FIREARM HANDGRIP ASSEMBLY WITH LASER GUNSIGHT SYSTEM

FIELD OF THE INVENTION

The present invention relates to firearm grip assemblies for handguns, and more particularly to a device that replaces the standard factory-supplied firearm handgrips without requiring significant modification of the firearm and enhances the functionality of the firearm by providing a laser gunsight operable by the user while the firearm is gripped by the handgrip in the firing position.

BACKGROUND OF THE INVENTION

Lasers are commonly used for firearm sighting when light conditions are poor, such as at night or in the darkened rooms of buildings. They are often used by police and military users of firearms, who need to be able to quickly and accurately aim the firearm at a poorly-illuminated target under low light conditions. They are increasingly popular for use with handguns, which are otherwise potentially difficult to aim and shoot accurately.

Laser sights have been developed that employ a battery-powered laser that has been sighted-in so that the laser illuminates the firearm's point of impact. The target reflects the laser beam back to the user, which informs the user exactly where the firearm is aimed and where the bullet will impact if the firearm is fired.

Various laser gunsight systems have been developed for use with firearms that are equipped with a handgrip. One example is the LG-401 LASERGRIPS® manufactured by Crimson Trace® of Wilsonville, Oreg. The standard factory-supplied grips are removed from the firearm and replaced by two panels that are screwed onto the firearm's frame. The two panels are connected by a front activation pad that wraps around the front strap of the firearm's handgrip. The handgrip is grasped by the user's hand when the firearm is being held in the firing position, and a laser attached to the top of the right grip is turned on while the front activation pad is depressed. The laser housing includes set screws to adjust the laser's elevation and windage when the laser is sighted-in by firing rounds at a target and noting any aiming error. The two batteries are capable of powering the laser for about four hours of illumination. However, the LG-401 LASERGRIPS® has a significant disadvantage in that the sighting-in process of the laser has to be repeated every time the batteries are changed. One of the two batteries cannot be replaced unless the right grip holding the laser is removed from the firearm so the battery can be accessed and replaced. When the right grip is reattached, there is no guarantee the laser beam will still accurately reflect the firearm's point of impact. Battery replacement is recommended at least annually, and even more frequently for heavy users, which creates considerable inconvenience if a shooting range is not readily available. Furthermore, if the batteries begin to fail or experience a complete failure in the field, the user cannot replace them without taking the chance that the laser beam will no longer accurately indicate the firearm's point of impact.

The LG-401 LASERGRIPS® has an additional disadvantage in that its exterior mimics the standard hard factory-supplied firearm grips for handguns. It is often desirable to utilize firearm handgrip assemblies composed of rubber or other relatively soft elastomers instead. The use of a soft firearm handgrip assembly provides the user with a more secure grip. Such firearm handgrip assemblies often include ergonomic features such as finger ridges and palm swells to provide adequate security for holding the gun during recoil. The firearm handgrip assemblies may also provide a larger grip circumference than the standard factory-supply firearm handgrips to accommodate users with larger hands. Firearm grip assemblies may include rigid inserts for reinforcement of the elastomer material.

Laser gunsight systems attached to firearms experience recoil impulses every time the firearm is discharged. One conventional approach to protecting the electronic components of laser gunsight systems from impact, vibration, and loose wires is potting. In potting, an electronic assembly is placed in a mold. The mold is then filled with a liquid compound that hardens, which permanently protects the electronics assembly. Thermosetting plastics, silicone rubber gels, or epoxy resins are typically used to fill the mold. Potting has the disadvantage of using a liquid compound, which can potentially enter areas where its presence is undesirable or produce unpredictable results when too much or too little is used. For example, in at least one example of a prior art laser gunsight system, it has been reported the epoxy or potting compound used to secure the laser to the grip was either pushed out or too much was used. As a result, when the grip was tightened, the targeting dot emitted by the laser tended to move toward the right, thereby resulting in undesirable aiming shifts causing an inaccurate indication of the point of aim on a target.

Therefore, a need exists for a new and improved firearm handgrip assembly that provides a laser gunsight system with an elastomeric restraint element having a definite shape contacting the laser element. In this regard, the various embodiments of the present invention substantially fulfill at least some of these needs. In this respect, the firearm handgrip assembly according to the present invention substantially departs from the conventional concepts and designs of the prior art, and in doing so provides an apparatus primarily developed for the purpose of providing a laser gunsight system with an elastomeric restraint element having a definite shape contacting the laser element.

SUMMARY OF THE INVENTION

The present invention provides an improved firearm handgrip assembly with laser gunsight system, and overcomes the above-mentioned disadvantages and drawbacks of the prior art. As such, the general purpose of the present invention, which will be described subsequently in greater detail, is to provide an improved firearm grip sleeve with laser gunsight system that has all the advantages of the prior art mentioned above.

To attain this, the preferred embodiment of the present invention essentially comprises a frame, a laser element movably connected to the frame, an adjustor connected the frame and operably connected to the laser element to establish an aiming direction of the laser element based on a position of the adjustor, and an elastomeric restraint element contacting the laser element. There may be a spring other than the restraint element and configured to bias the laser element against the adjustor. The laser element may be pivotally connected to the frame. The frame may define a laser element chamber configured to receive the laser element and may include a door configured to enclose the chamber. The door may include the elastomeric restraint element. The door may include a thermoplastic body, and the elastomeric restraint element may be connected to the thermoplastic body. The restraint element may be chemically bonded with the thermoplastic body. There are, of course, additional features of the invention that will be described hereinafter and which will form the subject matter of the claims attached.

There has thus been outlined, rather broadly, the more important features of the invention in order that the detailed description thereof that follows may be better understood and in order that the present contribution to the art may be better appreciated.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front isometric view of the current embodiment of a firearm handgrip assembly with laser gunsight system constructed in accordance with the principles of the present invention installed on the pistol frame of a M1911-type pistol.

FIG. 2 is an exploded view of the current embodiment of the firearm handgrip assembly with laser gunsight system of FIG. 1.

FIG. 3 is an exploded view of the right side of the current embodiment of the firearm handgrip assembly with laser gunsight system of FIG. 1.

FIG. 4 is an exploded view of the left side of the current embodiment of the firearm handgrip assembly with laser gunsight system of FIG. 1.

FIG. 5 is a block diagram of the current embodiment of the firearm handgrip assembly with laser gunsight system of FIG. 1.

FIG. 6 is a flowchart of the programming state program for use with current embodiment of the firearm handgrip assembly with laser gunsight system of FIG. 1.

FIG. 7 is an exploded view of the overmold process for the current embodiment of the firearm handgrip assembly with laser gunsight system of FIG. 1.

FIG. 8 is an enlarged view of the upper and lower battery pockets of the current embodiment of the firearm handgrip assembly with laser gunsight system of FIG. 1.

FIG. 9 is a top angled sectional view of the upper battery pocket of the current embodiment of the firearm handgrip assembly with laser gunsight system of FIG. 1.

FIG. 10 is a sectional view of the right side of the current embodiment of the firearm handgrip assembly with laser gunsight system installed on the pistol frame of a M1911-type pistol.

FIG. 11 is an enlarged view of the activation switch pocket of FIG. 10 denoted by the circled portion 11.

FIG. 12 is a sectional view of the right side of the current embodiment of the firearm handgrip assembly with laser gunsight system of FIG. 1.

FIG. 13 is an enlarged view of the laser pocket of FIG. 12 denoted by the circled portion 13.

FIG. 14 is a sectional view of the right side of the current embodiment of the firearm handgrip assembly with laser gunsight system of FIG. 1.

FIG. 15 is a sectional view taken along line 15-15 of FIG. 14.

FIG. 16 is a sectional view taken along line 16-16 of FIG. 14.

FIG. 17 is a front isometric view of an alternative embodiment of the firearm handgrip assembly with laser gunsight system constructed in accordance with the principles of the present invention installed on the pistol frame of a M1911-type pistol.

FIG. 18 is an exploded view of the alternative embodiment of the firearm handgrip assembly with laser gunsight system of FIG. 17.

FIG. 19 is an exploded view of the alternative embodiment of the firearm handgrip assembly with laser gunsight system of FIG. 17.

FIG. 20 is an exploded view of the alternative embodiment of the firearm handgrip assembly with laser gunsight system of FIG. 17.

FIG. 21 is a right side view of the alternative embodiment of the firearm handgrip assembly with laser gunsight system of FIG. 17.

FIG. 22 is a sectional view taken along line 21-21 of FIG. 21.

FIG. 23 is a left side view of the alternative embodiment of the firearm handgrip assembly with laser gunsight system of FIG. 17.

FIG. 24 is a sectional view taken along line 24-24 of FIG. 23.

FIG. 25 is a sectional view taken along line 25-25 of FIG. 17.

FIG. 26 is an enlarged view of circled area 26 of FIG. 25.

FIG. 27 is a sectional view taken along line 27-27 of FIG. 17.

FIG. 28 is an enlarged view of circled area 28 of FIG. 27.

FIG. 29 is an exploded view of the right side of a second alternative embodiment of the firearm handgrip assembly with laser gunsight system.

FIG. 30 is a front isometric view of the second alternative embodiment of the laser diode cover plate of FIG. 29 with the elastomeric restraint element removed.

FIG. 31 is a front isometric view of the second alternative embodiment of the laser diode cover plate of FIG. 29 with the elastomeric restraint element chemically bonded to the laser diode cover plate.

FIG. 32 is a front isometric view of the second alternative embodiment of the laser diode cover plate of FIG. 29 with laser diode received in the front and rear cradles of the laser diode cover plate.

FIG. 33 is a top sectional view of the second alternative embodiment of the firearm handgrip assembly with laser gunsight system of FIG. 29.

FIG. 34 is a sectional view of the second alternative embodiment of the firearm handgrip assembly with laser gunsight system of FIG. 29 taken through the elastomeric restraint element.

FIG. 35 is a sectional view of the second alternative embodiment of the firearm handgrip assembly with laser gunsight system of FIG. 29 taken behind the elastomeric restraint element.

The same reference numerals refer to the same parts throughout the various figures.

DESCRIPTION OF THE CURRENT EMBODIMENT

An embodiment of the firearm handgrip assembly with laser gunsight system of the present invention is shown and generally designated by the reference numeral 10.

FIGS. 1-4 illustrate the improved firearm handgrip assembly with laser gunsight system 10 of the present invention for use with a pistol having removable grips. This type of pistol typically has a molded plastic grip with a curved exterior to be comfortably received in a user's hand. The pistol includes a removable back strap insert (not shown). Only the frame 200 of the pistol is illustrated for clarity. More particularly, the one-piece integrally molded plastic frame shown is for an M1911 pistol.

The frame 200 has a downwardly-extending handgrip 202 that angles slightly rearward and is a tubular body defining an elongated well 204 capable of closely receiving a removable magazine (not shown). The handgrip has a lower free end 206. The grip has flat or gently curved right and left side portions 208, 210, a straight semi-cylindrical front strap 212 facing forward, and a curved back strap recess 214 facing rearward. The handgrip generally has an oblong, oval or “racetrack” cross-section. At the upper end of the front strap, a trigger guard 216 projects forward and upward to protect the trigger (not shown) from accidental activation. A magazine release (not shown) protrudes transversely from the frame in front of the handgrip through a magazine release aperture 218. The back strap extends nearly to the upper edge 220 of the frame, curving rearward at its upper portion. A beavertail protrusion portion 222 of the frame protrudes rearward at the upper end of the back strap recess.

The pistol frame 200 includes two screw holes on each of the left and right side portions of the handgrip 202 (screw holes 224, 226 on the right side portion 208 are visible; screw hole 256 on the left side portion 210 is visible in FIG. 20; screw hole 258 on the left side portion is visible in FIG. 17) that receive screws to attach standard factory-supplied grips (not shown) or replacement grips such as those provided by the firearm handgrip assembly with laser gunsight system 10. When the pistol frame is assembled for use, it also includes a back strap insert (not shown), which is a curved insert that is normally located on the rear of the grip immediately below the beavertail. The back strap insert is received by the back strap recess and has mating features that engage with the handgrip. Specifically, the pistol frame includes one screw hole 228, 230 on each of the left and right side portions adjacent to the lower free end 206 to secure the back strap insert. With the back strap insert and the grips installed, the handgrip has a curved and continuous surface to provide a secure comfortable grip, in the manner of any pistol. With the back strap and grips removed, the handgrip has discontinuities, steps, cavities, and other features that render it unsuitable for use.

The firearm handgrip assembly with laser gunsight system 10 of the present invention includes an exterior skin 12 with a top 14, a bottom 16, a left side 18, a right side 20, a front 22, and an interior surface 24. FIGS. 3 and 4 depict the firearm handgrip assembly with laser gunsight system 10 as if it were composed of discrete first and second grip body halves with a flexible connection portion for clarity, but the exterior skin 12 is continuous in the current embodiment. As a result, the flexible connection portion provides a continuous external surface of the firearm handgrip assembly with laser gunsight system 10 when the firearm handgrip assembly with laser gunsight system is connected to a frame 200. The top of the exterior skin defines a U-shaped trigger guard notch 26. The trigger guard notch provides clearance for the trigger guard 216. The right side of the trigger guard notch includes a magazine release notch 28. The magazine release notch 28 provides clearance for the magazine release aperture 218. The bottom of the exterior skin defines a notch 30, 32 on each side. The notches 30, 32 provide clearance for the back strap insert holes 228, 230. The roles of the notches 28, 30, 32 are best shown in FIG. 1.

A plurality of ridges 34 extends from the front 22 of the exterior skin 12. The ridges define a plurality of grooves between the ridges that receive the user's fingers when the pistol is held in a firing position. The front of the exterior skin also defines an activation switch cover 36 and a hinge 38. The activation switch cover is a flexible membrane in the current embodiment. The hinge joins the left side 18 of the exterior skin to the right side 20 of the exterior skin. The left and right sides of the exterior skin each define two screw holes (screw holes 40, 42 on the right side and screw holes 44, 46 on the left side). The screw holes on the exterior skin are axially registered with the screw holes 224, 226 on the pistol frame 200 so factory-supplied grip screws (not shown) can be used to secure the exterior skin to the handgrip 202.

The top 14 of the right side 20 of the exterior skin 12 exposes a right plate 56 that includes a laser housing 102. The laser housing has a forward-facing aperture 104 that exposes the front 108 of a beam projection element in the form of laser diode 106. The laser housing is positioned immediately below the upper edge 220 so the laser housing does not obstruct reciprocation of the slide (not shown) above the upper edge. The laser housing includes a windage screw 112 and an elevation screw 114 that adjust the position of the front of the laser diode to control the point of aim of a laser beam emitted by the laser diode through the forward-facing aperture.

The interior surface 48 of the exterior skin 12 defines a left plate pocket 50 on the left side 18 and a right plate pocket 52 on the right side 20 (shown in FIG. 7). The plate pockets receive a left plate 54 and the right plate 56, respectively, which are rigid. The front 22 of the interior surface of the exterior skin defines a front flex cable channel 58 that communicates between the left and right plate pockets. The front flex cable channel defines an activation switch pocket 60 at its midpoint. The interior surface of the exterior skin includes additional features that will be described in detail in the discussion of FIG. 5.

The left plate 54 defines an upper battery pocket 62, a lower battery pocket 64, an upper void 66, a lower void 68, a negative contact pocket 70, a negative contact post 72, a positive contact pocket 74, a positive contact post 76, two screw holes 78, 80, and a notch 82. The two screw holes are axially aligned with the screw holes 44, 46 on the left side of the exterior skin 12. The notch is aligned with the notch 32 on the bottom 16 of the exterior skin. The upper and lower battery pockets include additional features that will be described in detail in the discussion of FIGS. 5-7.

The right plate 56 defines a laser diode pocket 84, a wires channel 86, a control circuit receptacle in the form of a PC board pocket 88, a mode selector switch pocket 90, a lower flex cable channel 92, a safety switch pocket 94, a bottom aperture 96, four PC board posts 98, two lower portion posts 100, two screw holes 158, 160, a notch 162, and a notch 182. The two screw holes are axially aligned with the screw holes 40, 42 on the right side of the exterior skin 12. The notch 162 is aligned with the notch 32 on the bottom 16 of the exterior skin. The notch 182 is aligned with the magazine release notch 28 on the exterior skin.

When the firearm handgrip assembly with laser gunsight system 10 is assembled for use, the left and right plates 54, 56 and the interior surface 48 of the exterior skin 12 receive the laser gunsight system components of the present invention. More particularly, the laser gunsight system components include a laser diode 106, a circular coil spring 198, wires 236, a flex cable assembly 116, a PC board 118, a positive contact 120, a negative contact 122, an activation switch 124, a mode selection switch 126, a safety switch 128, upper and lower batteries 130, 132, and a cover plate 134. The laser diode has a front beam emitting end 108 and an opposed rear end 110. The flex cable assembly includes an upper portion 136 that defines four apertures 138, a conductive front flex cable 140 with a left end 142 that defines an aperture 144, a conductive lower flex cable 146, and a lower portion 148 that defines two apertures 150. The PC board defines four apertures 152 that are axially aligned with the four apertures in the upper portion of the flex cable assembly. The positive contact defines an aperture 154. The negative contact defines an aperture 156.

When the firearm handgrip assembly with laser gunsight system 10 is assembled for use, the left and right plates 54, 56 and the interior surface 48 of the exterior skin 12 receive the laser gunsight system components of the present invention. More particularly, the laser diode pocket 84 receives the laser diode 106 and spring 198. The wires 236 electrically connect the laser diode to the upper portion 134 of the flex cable assembly 116 and are received within the wires channel 86. The PC board pocket 88 receives the PC board 118 and the upper portion 136 of the flex cable assembly 116. The apertures 152 in the PC board and the apertures 138 in the upper portion receive the PC board posts 98 to secure and align the PC board and upper portion within the PC board pocket. The lower flex cable 146 electrically connects the upper portion to the front flex cable 140 and the lower portion 148 and is received within the lower flex cable channel 92. The safety switch pocket 94 receives the safety switch 128 and the lower portion. The safety switch is aligned with the aperture 96, and the apertures 150 in the lower portion receive the lower portion posts 100 to secure and align the lower portion and the safety switch within the safety switch pocket.

The activation switch 124 is received within the activation switch pocket 60. The activation switch is electrically connected to the midpoint of the front flex cable 140, which is received within the front flex cable channel 58. The left end 142 of the front flex cable and the positive contact 120 are electrically connected and received within the positive contact pocket 74. The aperture 144 in the left end and the aperture 154 in the positive contact receive the positive contact post 76 to secure and align the left end and positive contact within the positive contact pocket. The negative contact 122 is received within the negative contact pocket 70 and is electrically connected to the left end of the front flex cable. The aperture 156 in the negative contact receives the negative contact post 72 to secure and align the negative contact within the negative contact pocket. The cover plate 134 serves to further secure the left end, positive contact, and negative contact within their respective pockets. The upper battery 130 is received within the upper battery pocket 62, and the lower battery 132 is received within the lower battery pocket 64 to provide a power storage facility.

In the current embodiment, the safety switch 128 enables the laser gunsight system to be operable when in the on position and to be inoperable when in the off position. The activation switch 124 is a momentary switch that enables the upper and lower batteries 130, 132 to power the laser diode 106 when depressed and prevents the laser diode from being powered when released. The mode selection switch 126 determines the characteristics of the laser beam emitted by the laser diode. The available laser beam modes enabled when the activation switch is depressed can include continuously on at full power, dimmed, strobe, and momentary flicker. The mode can be changed by pressing and holding the mode selection switch for five seconds to enter a programming state, whereby the user can change the laser beam mode. To facilitate the user's ability to locate the mode selection switch, the exterior skin 12 may be marked with an indicium 244, such as a logo.

FIG. 5 is a block diagram illustrating the improved firearm handgrip assembly with laser gunsight system 10 of the present invention. More particularly, the pc board 118 includes memory 248 connected to a Central Processing Unit (CPU) 246 and the mode selection switch 126. The memory stores the current program mode 250 and brightness setting 252, as well as programming state program 300. The CPU uses the current program mode and brightness setting to control the laser beam emitted by the laser diode 106 when the safety switch 128 is in the on position and the activation switch 124 is actuated. When the activation switch is actuated, the CPU controls the flow of electricity from batteries 130,132 to laser diode 106 to produce a laser beam having the characteristics prescribed by the current program mode and brightness setting.

The firearm handgrip assembly with laser gunsight system 10 (including the laser beam emitting laser diode 106 and controller CPU 246 with connected memory 248) has three switches connected to the controller. The first switch (safety switch 128) is an on-off switch that prevents any operation when in a first position, and enables operation when in a second position. The safety switch is stable in each position so that it remains in the selected position when set and released. A second switch (activation switch 124) is a momentary switch that is accessible for operation in a location while the user is gripping the gun for firing. The activation switch has an on and an off position, and is biased to the off position so that it is in the on position only when pressure is applied by the user. A third switch (mode selection switch 126) establishes the operating mode when the safety switch and activation switch are both on. The mode selection switch is also a momentary switch that is biased to an open position, and which sends a signal to the controller circuitry in response to momentary pressure (a tap or push). The controller has several operating modes, and sequential pushes on the mode selection switch cycle the controller through the different operating modes. The available operating modes will be discussed subsequently in the description of FIG. 6.

The first switch (safety switch 128) is preferably a toggle switch located in a recess at the base of one of the grip panels (left and right plates 54, 56), so that it is not accidentally switched, but may be switched only by deliberate action with a fingernail or small tool. The second switch (activation switch 124) is preferably located on the front strap 212 of a pistol handgrip 202 below the trigger guard 216, where the activation switch rests under the user's middle finger as it naturally grips the gun. The third switch (mode selection switch 126) is preferably located in the middle of a grip panel, under a distinctive feature such as a logo medallion (indicium 244) to enable a user to locate it. Operation of the mode selection switch requires a deliberate pressure with a fingertip.

The activation and mode selection switches 124, 126 include a flexible exterior skin membrane 12 covering them (activation switch cover 36 and indicium 244). The membrane is coextensive to cover the grip panels (left and right plates 54, 56) to provide a resilient gripping surface.

When the firearm handgrip is gripped by a user's hand for firing, the activation switch 124 will be covered by the user's finger for selectable actuation, mode selection switch 126 will be covered by the palm of the user's hand to prevent actuation, and the safety switch 128 will be away from the user's hand to avoid actuation. The controller has electrical connections to each of the three switches.

FIG. 6 is a flowchart of the programming state program 300 for use with the improved firearm handgrip assembly with laser gunsight system 10 of the present invention. More particularly, the program starts (310) by checking if the mode selection switch 126 has been depressed for 5 seconds (312). If the mode selection switch has been depressed for five seconds, the CPU 246 retrieves the current program mode 250 and brightness setting 252 from memory 248. Subsequently, the CPU causes the laser diode 106 to illuminate in the manner prescribed by the current program mode and brightness setting (316). If the mode selection switch has been depressed within the last five seconds (318), the CPU changes the current program mode to the next program mode and stores the change as the current program mode in memory 248. The program then returns to step 316, which gives the user an opportunity to view the result and make additional changes to the characteristics of the laser beam if desired.

If the mode selection switch 126 has not been depressed within the last five seconds at step 318, the program checks if the activation switch 124 has been depressed within the last five seconds (322). If the activation switch has been depressed within the last five seconds, the CPU 246 changes the current brightness setting to the next brightness setting and stores the change as the current brightness setting in memory 248. The program then returns to step 316, which gives the user an opportunity to view the result and make additional changes to the characteristics of the laser beam if desired. Once five seconds have passed without the user pressing either the mode selection switch or the activation switch, the program ends (326).

In the current embodiment, the mode selection switch 126 is used to cycle between flashing, stealth target, or steady modes. In flashing mode, the laser will blink twice per second while the activation switch 124 is depressed. In stealth target mode, a press of the activation switch activates a burst of three quick flashes of the laser beam, then the laser diode turns off for stealth targeting. This mode will repeat with each press of the activation button. The user can hold the activation button down to override the stealth target mode and enter steady mode. In steady mode, pressing and holding the activation button results in a continuous laser beam.

In the current embodiment, the activation switch 124 is used in the programming state to set one of three levels of laser beam brightness. Each time the activation switch is pressed and released in the programming state, the laser beam's brightness will be reduced by one level. After the minimum brightness level setting is reached, the next press of the activation switch will return the laser beam's brightness to the maximum brightness setting.

FIG. 7 illustrates the overmold process used to manufacture the improved firearm handgrip assembly with laser gunsight system 10 of the present invention. More particularly, in the current embodiment the firearm handgrip assembly with laser gunsight system 10 is a unitary molded piece comprising two materials. The exterior skin 12 is made of thermoplastic elastomer in the current embodiment. However, the exterior skin may be any elastomeric material preferably having a minimum durometer hardness of 30A in order to provide adequate firmness to retain shape and resist dislocation, and preferably having a hardness of no more than 80A so the material maintains sufficient elasticity to be comfortable to grip. The left and right plates 54, 56 are a rigid material, which is a hard plastic element molded into the rubber exterior skin in the current embodiment. It is desirable for the two materials to form a chemical bond between them. Such a molding process is described in U.S. Pat. No. 6,301,817 (Hogue et al.).

Prior to the overmolding process, the exterior skin 12, left plate 54, right plate 56, cover plate 134, and PC board 118 are fabricated as discrete components. The interior surface 24 of the exterior skin includes upper protrusions 168, 170 and lower protrusions 172, 174 on the left side 18. The upper protrusions are aligned with apertures 178, 190 formed in the upper battery pocket 62 of the left plate when the left plate is molded into the left plate pocket 50 in the exterior skin. The lower protrusions are aligned with apertures 180, 196 formed in the lower battery pocket 64 of the left plate when the left plate is molded into the left plate pocket in the exterior skin.

An aperture 176 is present at the bottom 16 of the right side 20 of the exterior skin 12. The aperture is aligned with the aperture 96 in the bottom of the right plate 56 when the right plate is molded into the right plate pocket 52 in the exterior skin. The apertures enable the user to access the safety switch 128 while the firearm handgrip assembly with laser gunsight system 10 is installed on a pistol frame 200.

FIGS. 8 and 9 illustrate the improved upper and lower battery pockets 62, 64 of the present invention. More particularly, the apertures 178, 190 in the upper battery pocket and the apertures 180, 196 in the lower battery pocket enable the upper protrusions 168, 170 and lower protrusions 172, 174 to enter into the upper and lower battery compartments during the overmolding process and fit into undercuts beneath the upper battery retention surfaces 182, 184 and lower battery retention surfaces 186, 188. To prevent the upper and lower protrusions from distorting during the overmolding process, dummy upper battery 164 and dummy lower battery 166 are inserted into the upper and lower battery pockets prior to molding. The dummy upper and lower batteries serve as supports for the thin upper and lower protrusion membranes during the overmolding process. The dummy upper and lower batteries are then removed from the upper and lower battery compartments.

The upper and lower protrusions serve to hold the upper and lower batteries 130, 132 in place despite any shock or vibration that the firearm handgrip assembly with laser gunsight system 10 may experience. The upper and lower batteries are firmly held in place yet easily removable because of the presence of upper void 66 and lower void 68. The upper and lower voids make the upper battery retention surface 182 and lower battery retention surface 186 thin and flexible. As a result, the user can flex the upper and lower battery retention surfaces into the upper and lower voids in order to remove the upper and lower batteries. The replacement upper and lower batteries will then flex the upper and lower battery retention surfaces into the upper and lower voids when the batteries are inserted, and the upper and lower battery retention surfaces will then snap back into place to firmly hold the batteries.

FIGS. 10 and 11 illustrate the improved activation switch cover 36 and activation switch pocket 60 of the present invention. More particularly, the activation switch pocket is located in the middle of the front 22 of the interior surface 24 of the exterior skin 12 and is in communication with the front flex cable channel 58. The activation switch pocket receives the activation switch 124. The activation switch is held in an angled forward position parallel to the activation switch cover 36 by two elastomeric/compressible flaps 238, 240. The flaps are shaped to support the activation switch in that position. The activation switch cover 36 is a membrane that both protects the activation switch from the external environment and flexes to allow the activation switch to be actuated when the user squeezes the activation switch cover. The underside of the activation switch cover defines an elastomeric bump 242 that contacts the activation switch.

The elastomeric/compressible flaps 238, 240 further provide a compressible backing support for the activation switch 124. The compressible backing support and the elastomeric bump 242 enable the firearm handgrip assembly with laser gunsight system 10 to accommodate variations in frame tolerances between M1911 pistols produced by different manufacturers. If the activation switch pocket did not include a compressible backing support and elastomeric bump, the amount of pressure required to actuate the activation switch would vary considerably depending on the specific M1911 pistol frame the firearm handgrip assembly with laser gunsight system 10 was attached to. Substantial variability in actuation pressure could be problematic for both manufacturing quality control and for the user. By using both the elastomeric bump and the two elastomeric/compressible flaps, minimally variable actuation pressure is achieved regardless of which M1911 pistol frame the firearm handgrip assembly with laser gunsight system 10 is attached to.

FIGS. 12-16 illustrate the improved laser housing 102 and laser diode 106 of the present invention. More particularly, the rear 110 of the laser diode has a central bore 194 that receives one end of the circular coil spring 198. The circular coil spring not only provides stress relief for the wires 236 as the wires enter the wires channel 86, but the spring also urges the exterior surface 192 of the laser diode against the windage screw 112 and elevation screw 114, thereby fixing the laser diode in place within the laser diode pocket 84 of the laser housing. As a result, the point of aim of a laser beam emitted by the front 108 of the laser diode through the front facing aperture 104 of the laser housing along optical axis 254 is determined and can be adjusted by the extent to which the windage screw and elevation screw penetrate into the laser diode pocket. Curved surfaces 232, 234 adjacent to the front facing aperture form a socket that engages with the spherical surface portion of the front of laser diode to form a ball and socket joint, which enables the front of the laser diode to pivot within the socket. The spring also serves to bias the spherical surface portion of the front of the laser diode towards the socket.

In use, the firearm handgrip assembly with laser gunsight system 10 is installed on the standard factory-supplied handgrip 202 of a pistol with removable grips. To attach the firearm handgrip assembly with laser gunsight system 10, the grips are removed from the handgrip by unscrewing the factory-supplied screws from the handgrip. Subsequently, the right plate 56 is attached to the right side 208 of the handgrip using the factory supplied screws, the front 22 of the exterior skin 12 is wrapped around the front strap 212 below the trigger guard 216, and the left plate 54 is attached to the left side 210 of the handgrip using the factory supplied screws.

The firearm handgrip assembly with laser gunsight system 10 is then ready to undergo the sighting-in procedure. While squeezing the activation switch cover 36 to activate the laser diode 106, the user fires a few rounds at a target. After noting where the bullets are striking relative to the laser beam reflection on the target is located, the user adjusts the windage screw 112 and/or the elevation screw 114 until subsequent fired rounds impact where the laser beam reflection on the target is located. The laser diode will remain sighted-in until the right plate 56 is loosened or detached from the handgrip 202.

Although the upper and lower batteries 130, 132 will provide sufficient power for the laser diode 106 to illuminate for several hours, the batteries eventually require replacement.

Fortunately, both batteries can be replaced without loosening or detaching the right plate 56 from the handgrip 202. Instead, the user merely detaches the left plate 54 from the left side 210 of the handgrip by unscrewing the factory-supplied screws on the outside while the right plate remains firmly secured to the handgrip. The spent batteries are removed, new batteries are inserted, and the left plate is reattached to the left side of the handgrip without any disturbance to the position of the right plate or the laser diode. As a result, both batteries can be replaced without requiring the user to repeat the sighting-in process since no point of aim error can be introduced by the battery change process. Optionally, different screw types or screw caps could be used for the left plate and right plate to convey which plate is intended to be removed for routine access and which is not intended to be removed.

FIGS. 17-20 illustrate an alternative embodiment of the improved firearm handgrip assembly with laser gunsight system 400 of the present invention for use with a pistol having removable grips. This type of pistol typically has a molded plastic grip with a curved exterior to be comfortably received in a user's hand. The pistol includes a removable back strap insert (not shown). Only the frame 200 of the pistol is illustrated for clarity. More particularly, the one-piece integrally molded plastic frame shown is for an M1911 pistol.

The firearm handgrip assembly with laser gunsight system 400 of the present invention has a laser device assembly 412, a right grip panel 512, and a left grip panel 538. The laser device assembly includes a circuit housing 414 having a top 416, bottom 418, front 420, rear 422, and exterior 424. The circuit housing is adapted to overlay and connect to a selected portion of the right side 208 of the grip portion 202. The exterior of the circuit housing defines an on/off switch hole 426, a mode switch hole 428, and a screw hole 432. The front of the circuit housing defines a notch 430. The top of the circuit housing includes a laser housing 434 having a windage screw 436, and elevation screw 568 (shown in FIG. 23), and a front aperture 438. The laser housing receives a laser diode 440 having a front 442 and a rear 444. A biasing spring 446 abuts the rear of the laser diode. The laser diode is secured within the laser housing by a laser diode cover plate 448. The laser diode cover plate has an interior 450 that includes a front cradle 452 and a rear cradle 454 that receive the front and rear of the laser diode.

An on/off switch 456 has a switch transfer bar 458 that protrudes through the on/off switch hole 426 in the circuit housing 414. A mode switch 496 that protrudes through the mode switch hole 428. A PCB cover plate 460 secures the on/off switch and the mode switch within the circuit housing. One end 490 of a flex cable 488 is electrically connected to the mode switch and extends from the front 420 of the circuit housing. The opposing end 492 of the flex cable is connected to a positive contact 468 and a negative contact 470. The positive and negative contacts are received within a battery housing 472. The battery housing is adapted to overlay and connect to a selected portion of the left side 210 of the grip portion 202. An actuator switch 494 is attached to a midportion of the flex cable to make the actuator switch operably connected to the electronic components.

A wraparound elastomer 498 having a right 500, left 502, front 504, and rear 506 is a flexible web element that covers the flex cable 488. The wraparound elastomer is shaped to wraparound the front strap 212 of the pistol frame 200 below the trigger guard 216. The right rear portion of the wraparound elastomer includes a mode switch cover 510 that covers the mode switch 496. The mode switch cover is formed with a visible indicium 574. The front of the wraparound elastomer defines an actuator switch cover 508 that covers the actuator switch 494. The right rear of the wraparound elastomer is sized to be closely received within the notch 430 in the circuit housing 414. The left rear of the wraparound elastomer is sized to be closely received within a notch 478 in the front 484 of the battery housing 472. As a result, the wraparound elastomer interconnects the circuit housing and the battery housing. The elastomeric wraparound is overmolded onto the circuit housing and battery housing using the same process described in conjunction with FIG. 7 and in U.S. Pat. No. 6,301,817 (Hogue et al.). The battery housing also has a top 480, bottom 482, and rear 486. The top of the battery housing defines an upper battery compartment 474 that receives an upper battery 462. The bottom of the battery housing defines a lower battery compartment 476 that receives a lower battery 466. A contact cover 464 retains the positive and negative contacts 468, 470 in a space between the upper and lower battery compartments where they are in electrical contact with the opposed end 492 of the flex cable 488.

A right grip panel 512 includes an interior 536 circuit housing recess 564 (shown in FIG. 23) that closely receives the circuit housing 414. The right grip panel also has a top 514, bottom 516, front 518, rear 520, and exterior 522. The right grip panel has a peripheral portion extending beyond the circuit housing recess that contacts the frame 200. The front edge of the right grip panel is flush with the front strap of the frame, and the rear edge of the right grip panel is flush with the rear strap of the frame. The circuit housing is spaced apart from the front strap and the rear strap. The right grip panel is free of any electronic components and is electrically disconnected from the circuit housing. The right grip panel has flat inner interior surfaces contacting the frame and contoured outer exterior surfaces. The right grip panel defines a screw hole 524, magazine release aperture notch 526, notch 528, mode switch hole 530, on/off switch hole 532, screw hole 534, and notch 562. The top closely abuts the laser housing 534. The screw hole 524 is axially registered with the screw hole 432 in the circuit housing and the screw hole 224 in the pistol frame 200 such that a single fastener passing through the screw holes 524, 432 engaging screw hole 224 secures the right grip panel and the circuit housing to the frame. The magazine release aperture notch 526 provides clearance for the magazine release aperture 218. Notch 528 closely receives notch 430 in the circuit housing. Mode switch hole 530 closely receives and exposes the mode switch cover 510. The mode switch cover is flexible and axially registered with the mode switch hole and the mode switch 496 such that depressing the mode switch cover actuates the mode switch. On/off switch hole 532 is axially registered with on/off switch hole 426 in the circuit housing and exposes the switch transfer bar 458. Screw hole 534 is axially registered with screw hole 226 in the pistol frame and is spaced apart from the circuit housing. Notch 562 exposes screw hole 230 in the pistol frame.

A left grip panel 538 includes an interior 550 battery housing recess 554 that closely receives the battery housing 472. The left grip panel also has a top 540, bottom 542, front 544, rear 546, and exterior 548. The left grip panel has a peripheral portion extending beyond the battery housing recess that contacts the frame 200. The front edge of the left grip panel is flush with the front strap of the frame, and the rear edge of the right grip panel is flush with the rear strap of the frame. The battery housing is spaced apart from the front strap and the rear strap. The left grip panel is free of any electronic components and is electrically disconnected from the circuit housing. The left grip panel has flat inner interior surfaces contacting the frame and contoured outer exterior surfaces. The left grip panel defines a screw hole 552, screw hole 558, notch 556, and notch 560. The screw hole 552 is axially registered with a screw hole 256 (shown in FIG. 25) in the left side 210 of the pistol frame 200. Notch 556 closely receives notch 478 in the battery housing. Screw hole 558 is axially registered with screw hole 258 in the left side of the pistol frame. Notch 560 exposes screw hole 228 in the pistol frame.

The actuator switch 494, mode switch 496, and on/off switch 456 interact with the same electronic components as those associated with the firearm handgrip assembly with laser gunsight system 10 to provide the same functionality previously described for the activation switch 124, mode selection switch 126, and safety switch 128.

FIGS. 21 and 22 illustrate the left grip panel 538. More particularly, the battery housing 472 is shown closely received within the battery housing recess 554. The rear 486 of the battery housing defines a tongue portion 564 that snaps into groove 566 in the rear 546 of the battery housing recess to releasably retain the battery housing within the battery housing recess.

FIGS. 23 and 24 illustrate the right grip panel 512. More particularly, the circuit housing 414 is shown closely received within the circuit housing recess 564. The rear 422 of the circuit housing defines a tongue portion 570 that snaps into groove 572 in the rear 520 of the circuit housing recess to releasably retain the circuit housing within the circuit housing recess.

FIG. 25 illustrates the alternative embodiment of the improved firearm handgrip assembly with laser gunsight system 400. More particularly, the axial registration of screw hole 552 with screw hole 256, screw hole 558 with screw hole 258, screw hole 524 with screw hole 432 and screw hole 224, and screw hole 534 with screw hole 226 can be best appreciated such that the screw holes can receive factory-supplied screws 260, 262, 264, 266 to attach the right grip panel 512 and left grip panel 538 to the handgrip 202.

FIG. 26 illustrates the alternative embodiment of the improved firearm handgrip assembly with laser gunsight system 400. More particularly, the layered arrangement of the right side 208 of the firearm frame 200, the end 490 of the flex cable 488, the mode switch 496, and the mode switch cover 510 and right grip panel 512 can be best appreciated.

FIGS. 27 and 28 illustrate the alternative embodiment of the improved firearm handgrip assembly with laser gunsight system 400. More particularly, the layered arrangement of the front strap 212 of the firearm frame 200, the midportion of the flex cable 488, the actuator switch 494, and the activator switch cover 508 can be best appreciated.

Although the upper and lower batteries 462, 466 will provide sufficient power for the laser diode 440 to illuminate for several hours, the batteries eventually require replacement. Fortunately, both batteries can be replaced without loosening or detaching the right grip panel 512 from the handgrip 202. Instead, the user merely detaches the left grip panel 538 from the left side 210 of the handgrip by unscrewing the factory-supplied screws on the outside while the right grip panel remains firmly secured to the handgrip. The spent batteries are removed, new batteries are inserted, and the left grip panel is reattached to the left side of the handgrip without any disturbance to the position of the right grip panel or the laser diode. As a result, both batteries can be replaced without requiring the user to repeat the sighting-in process since no point of aim error can be introduced by the battery change process. Optionally, different screw types or screw caps could be used for the left grip panel and right grip panel to convey which plate is intended to be removed for routine access and which is not intended to be removed.

FIGS. 29-35 illustrate a second alternative embodiment of the improved firearm handgrip assembly with laser gunsight system 600 of the present invention. More particularly, the firearm handgrip assembly with laser gunsight system 600 has a laser device assembly 612 that includes a circuit housing 614 having a top 616, bottom 618, front 620, rear 622, and exterior 624. The circuit housing is adapted to overlay and connect to a selected portion of the right side 208 of the grip portion 202. The exterior of the circuit housing defines an on/off switch hole 626, a mode switch hole 628, and a screw hole 632. The front of the circuit housing defines a notch 630. The top of the circuit housing includes a laser housing 634 having a windage screw 636, and elevation screw 662, and a front aperture 638 (shown in FIG. 33). The laser housing receives a laser diode 640 having a front 642 and a rear 644. The windage screw and elevation screw each have nose ends 672, 674 configured to contact the laser diode. A biasing spring 646 abuts the rear of the laser diode. The laser diode is secured within the laser housing by a laser diode cover plate 648. The laser diode cover plate has an interior 650 that includes a front cradle 452 and a rear cradle 454 (shown in FIGS. 30-32) that receive the front and rear of the laser diode. The remaining electronic and structural components not shown are substantially identical to those of the firearm handgrip assembly with laser gunsight system 400.

The interior 650 of the laser diode cover plate 648 includes a U-shaped recess 656 located between the front and rear cradles 652, 654. An elastomeric restraint element 658 is received within in the U-shaped recess to chemically bond the elastomeric restraint element to the laser diode cover plate using the same process described in conjunction with FIGS. 7, 17-20, and in U.S. Pat. No. 6,301,817 (Hogue et al.). A plug 660 occupies one end of the U-shaped recess at the conclusion of the overmolding process. The elastomeric restraint element includes a front cradle 664 and a rear cradle 666. The front and rear cradles are two spaced-apart sub elements each contacting the laser diode 640.

The circuit housing 614 can be viewed as a frame. The laser diode 640 is a laser element movably and pivotally connected to the frame. The windage screw 636 and elevation screw 662 are each an adjustor connected to the frame and operably connected to the laser element to establish an aiming direction of the laser element based on a position of the adjustor. The biasing spring 646 is a spring other than the elastomeric restraint element 658 and is configured to bias the laser element against the adjustor. The frame defines a laser element chamber 684 configured to receive the laser diode. The laser diode cover plate 648 is a door portion of the frame configured to enclose the laser element chamber. The laser diode cover plate includes the elastomeric restraint element. The front cradle 652 of the laser diode cover plate includes at least a portion of a socket to pivotally connect the laser diode to the frame. In the current embodiment, the laser diode cover plate includes a thermoplastic body, and the elastomeric restraint element is connected to the thermoplastic body. The elastomeric restraint element is chemically bonded with the thermoplastic body. The elastomeric restraint element is overmolded with the thermoplastic body. The laser diode cover plate is a planar body, and the elastomeric restraint element protrudes from a major surface (the interior 650) of the body. The laser diode cover plate is also an elongated body, and the elastomeric restraint element is a planar body oriented perpendicular to the laser diode cover plate. The elastomeric restraint element has a definite shape. In the context of the specification, the term “definite shape” contrasts with a cast or potted blob of material that has a shape defined only by the objects it contacts when it solidifies, and by the natural flow or surface tension where is does not contact an object. Overmolding of the elastomeric restraint element to chemically bond the elastomeric restraint element to the laser diode cover plate does not involve liquids, so the process does not involve potting. Thus, the overmolding process is advantageous because the overmolding process results in a molded, precision part instead of a quantity of solidified liquid that has unpredictable results even when a mold is used. The elastomeric restraint element has a concave contoured surface receiving the laser element (concave surfaces 668, 670 on the front and rear cradles 664, 666). The laser element is an elongated body, and the elastomeric restraint element contacts an intermediate portion 686 of the laser element. The elastomeric restraint element is registered with the adjustor to provide an opposing force. The elastomeric restraint element has a first surface portion (surface portions 676, 678) opposite and facing the windage set screw and a second surface portion (surface portions 680, 682) facing the elevation set screw.

The elastomeric restraint element 658 may be always in contact with the laser diode 640 and compressing the laser diode over the productive range of adjustment of the windage screw 636 and elevation screw 662, or just touching the laser diode without compressing for some adjustments of the windage and elevation screws, or even spaced apart from the laser diode by a gap for some adjustments of the windage and elevation screws. The elastomeric restraint element is formed of a resilient material that elastically returns to its illustrated configuration after substantial compression. The term “resilient” is used herein to distinguish from materials (including most thermoplastics) that are essentially rigid, even if they will undergo slight elastic deformation from which they may recover without permanent distortion. The hardness of the elastomeric restraint element may vary. A lower hardness limit is required to avoid an elastomeric restraint element that is so soft it does not withstand anticipated forces. If the elastomeric restraint element were too hard, it would generate concentrated forces and have inadequate flexure to absorb energy and prevent damage to the laser diode. While a generally rigid plastic that may compress to less than 90% of its length without permanent deformation may in some senses be resilient, it is not considered resilient for the purposes of this disclosure, which contemplates substantial resiliency in the manner of an elastomer that can be compressed to less than 50% of its length repeatedly without permanent deformation. For this disclosure, “resilient” materials include rubber, silicone and any other synthetic or natural elastomer, as well as composite elements including more than one material, and/or with complex forms, including metal or other springs, compressible gas-filled bladders or bellows, and the like. Such elements may be used to construct a “resilient” nose element body, even when they include materials that would not be considered “resilient” if employed in monolithic form.

The laser diode 640 is presumed to always strike the elastomeric restraint element 658 to dissipate energy, which prevents denting of the laser diode upon resuming contact with the windage and elevation screws 636, 662. The dissipation of energy may prevent permanent or temporary aiming shifts caused by denting or temporary dislocation of the laser diode within the laser element chamber 684 that is restored upon another recoil impulse. The elastomeric restraint element is suitable for use with any weapon-mounted laser subject to recoil jostling.

In the context of the specification, the terms “rear” and “rearward,” and “front” and “forward,” have the following definitions: “rear” or “rearward” means in the direction away from the muzzle of the firearm while “front” or “forward” means it is in the direction towards the muzzle of the firearm.

While current embodiments of a firearm handgrip assembly with laser gunsight system has been described in detail, it should be apparent that modifications and variations thereto are possible, all of which fall within the true spirit and scope of the invention. With respect to the above description then, it is to be realized that the optimum dimensional relationships for the parts of the invention, to include variations in size, materials, shape, form, function and manner of operation, assembly and use, are deemed readily apparent and obvious to one skilled in the art, and all equivalent relationships to those illustrated in the drawings and described in the specification are intended to be encompassed by the present invention. For example, while M1911 pistols as described are the most likely contemplated application for the concepts of the present invention, it should be appreciated that the current invention could be used with any firearm grip, including revolvers and rifles such as AR-15s, as well as hand and power tools and other implements with a handgrip. Furthermore, the left and right grip panels can be made of any suitable material, including plastic, wood, or a composite material.

Therefore, the foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the invention.

	Number	Date	Country
Parent	15403086	Jan 2017	US
Child	16185308		US
Parent	14964503	Dec 2015	US
Child	15265458		US
Parent	14592976	Jan 2015	US
Child	14964503		US

	Number	Date	Country
Parent	16185308	Nov 2018	US
Child	16283648		US
Parent	15265458	Sep 2016	US
Child	15403086		US

FIREARM HANDGRIP ASSEMBLY WITH LASER GUNSIGHT SYSTEM

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CROSS-REFERENCE TO RELATED APPLICATIONS

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