Patent Application
20070074443
This invention relates to accessory mounts for mounting an accessory to a firearm, and more particularly to a mount or interface adapter for securing a light beam generator apparatus to a firearm including a handgun.
Light beam generator apparatus, such as flashlights and laser aiming devices, have long been adapted for being secured to firearms as target illuminators and laser sights. For example, U.S. Pat. No. 4,777,754, issued to Edward C. Reynolds, Jr. and assigned to the assignee of the present invention, teaches a light beam generator assembly mounted to a firearm below the firearm's barrel and forwardly of the firearm's trigger guard. As applied to a handgun having a longitudinally moveable slide and a slide stop which causes the slide to lock open automatically after the last round has been fired and ejected, or which may be manually actuated at other times, the Reynolds light beam generating apparatus is pivotably secured to the handgun's slide stop pin transversely secured to the handgun frame. Positional stabilization of the secured light beam generator device on the handgun is facilitated by an adjustable set screw extending from the rear of the light beam generator housing and abutting the front surface of the handgun's trigger guard. Reynolds U.S. Pat. No. 4,777,754 is incorporated herein by reference.
U.S. Pat. No. 6,378,237, issued to John W. Matthews and Paul Y. Kim and assigned to the assignee of the present invention, discloses an accessory mount or interface adapter clamped to the front of the handgun's trigger guard and longitudinally extending beneath the handgun's barrel. The accessory mount includes a rail having a pair of longitudinal grooves, one along each side of the rail, and the light beam generator apparatus includes a pair of longitudinal tongues for slidably mating with the mount's longitudinal grooves for being slidably held along the rail. A latch on the light beam generator housing co-acts with a transverse slot in the rail to releasably prevent further longitudinal movement of the light beam generator apparatus when such apparatus is at a predetermined position along the rail. Matthews et al. U.S. Pat. No. 6,378,237 is incorporated herein by reference.
U.S. patent application Ser. No. 10/889,768, by Paul Y. Kim and assigned to the assignee of the present invention, published as U.S. Patent Application Publication No. US-2005-0115142-A1, discloses an accessory mount or interface adapter for mounting a rail mountable accessory (such as a light beam generator apparatus) to a firearm, which accessory mount is removably secured to the firearm through utilization of an improved slide stop and pin combination, and which accessory mount is positionally stabilized by utilization of a shock absorbing trigger guard bumper. In the preferred embodiment disclosed therein, a rearwardly spring-biased resilient bumper is carried by the accessory mount and rearwardly urged against the trigger guard. U.S. Patent Application Publication No. U.S.-2005-0115142-A1 is incorporated herein by reference.
By the present invention, there is provided an accessory mount or interface adapter having a rail for mounting a rail mountable accessory (in particular a light beam generator apparatus) to a firearm, which accessory mount is removably secured to the firearm through utilization of a transverse pin retained by the firearm, and which accessory mount is positionally stabilized by utilization of a preferably elastomeric generally wedge shaped member urged between the mount and the firearm's trigger guard.
According to a preferred embodiment of the present invention, there is provided an accessory mount for mounting an accessory device to a firearm, the firearm including a longitudinal barrel, a frame having a transverse bore and a trigger guard, the accessory device comprising the combination of: a longitudinal rail adapted for removably securing the accessory device thereto; structural members upwardly projecting from the respective sides of the rail and adapted to straddle the frame with the rail beneath the barrel and forwardly of the trigger guard, the structural members including respective bores situated for being transversely aligned with the bore in the frame when the accessory mount is applied to the frame; a pin configured for being received by the bores in the longitudinal members and the bore in the frame when the accessory mount is applied to the firearm; an appendage downwardly projecting from the rail in the vicinity of the rear end of the rail; and a generally wedge shaped member, preferably elastomeric and carried by the appendage, for being wedged between the appendage and the trigger guard when the accessory mount is applied to the firearm with the pin received by the bores in the structural members and the bore in the frame.
The preferred embodiment of the present invention is of particular application with a handgun including a slide and a slide stop, wherein the pin is secured to the slide stop for pivotally securing the slide stop to the frame of the firearm. The slide stop is preferably pivotable about the pin, such as by being rotatably secured to the pin.
In the accessory mount of the preferred embodiment, the appendage includes a front wall depending from the rail and having a rear surface engaging a first wedging face of the elastomeric generally wedge shaped member. The generally wedge shaped member includes a second wedging face engaging a front surface of the trigger guard when the generally wedge shaped member is wedged between the appendage and the trigger guard. The generally wedge shaped member includes a base, and the appendage includes a threaded bore and a set screw threadedly engaging the threaded bore for cooperating with the base for urging the generally wedge shaped member to be wedged between the rear surface of the appendage front wall and the front surface of the trigger guard.
In the preferred embodiment where the generally wedge shaped member is elastomeric, the generally wedge shape member includes a rigid plate on the base for being contacted by the set screw.
According to another aspect of the present invention, there is provided apparatus for a firearm including a longitudinal barrel, a frame having a transverse bore, and a slide longitudinally movable along the frame, such apparatus comprising: a pin configured for being received by the transverse bore, the pin including a head and an annular protrusion spaced from the head; and a slide stop rotationally secured to the pin between the head and the protrusion. In a preferred embodiment, the pin includes an annular groove spaced from the head; and the protrusion comprises a ring retained by the groove and peripherally protruding therefrom.
The novel features believed to be characteristic of the present invention, together with further advantages thereof, will be better understood from the following description considered in connection with the accompanying drawings in which preferred embodiments of the invention are illustrated by way of example. It is to be expressly understood, however, that the drawings are for the purpose of illustration and description only and are not intended as a definition of the limits of the invention.
Turning to the drawings, there is illustrated in
As used herein, the word “longitudinal” describes a direction along or parallel to the axis a; “transverse” describes a horizontal direction perpendicular to the axis a when the barrel 18 is horizontally positioned; “above” means vertically above when the handgun 12 is held with its barrel 18 horizontal; “below” or “beneath” means vertically below when the handgun 12 is held with the barrel 18 horizontal; “front” or “forward” describes the direction toward the muzzle of the barrel 18 (i.e., to the left as shown in
As is well known in handguns of this type, upon firing of the handgun the slide moves rearwardly with respect to the frame, extracting the fired cartridge case for ejection by the ejector, cocks the hammer and compresses the recoil spring, after which the slide moves forwardly feeding the next cartridge into the chamber and locking the breech. After the last round has been fired and ejected, a slide stop 28 is rotatably urged by the magazine follower to pivot about the axis of a transverse pin 30 supported by the frame 20, such that a projection 32—slidably retained along a longitudinal edge of the slide 22—of the slide stop 28 (see also
The accessory mount 14 includes a longitudinal rail 36 (parallel to longitudinal axis a′ which is beneath and parallel to the axis a when the accessory mount 14 is installed on the handgun 12) having two longitudinal grooves 38, one along each side of the rail 36. Two structural members or uprights 40 upwardly project from the rail 36 and longitudinally extend along the respective sides of the rail 36. Two transversely aligned bores 42 extend through the uprights 40 in the vicinity of the rear ends 44 of the structural members 40. An appendage 46 projects downwardly from the rail 36, and is preferably positioned toward the rear of the rail 36 and forwardly of the transverse bores 42.
The accessory mount 14 is dimensioned such that it may be placed to the handgun 12 with the structural members 40 straddling the handgun's frame 20 beneath the barrel 18, and with the appendage 46 just forward of the trigger guard 24 when the structural members'rear bores 42 are transversely aligned with a transverse bore 48 (
In its preferred embodiment, the appendage 46 is generally U-shaped in cross-section, and includes a generally vertical front wall 50 depending from the rail 36, lateral walls for straddling a front section of the trigger guard 24 when the accessory mount 14 is installed to the handgun 12, and a lip 54 rearwardly projecting from the bottom edge of the front wall 50 but forwardly spaced from the trigger guard 24.
The appendage 46 further includes a set screw 56 threadedly retained by a threaded bore 58 through the appendage 46 generally along the intersection of the front wall 50 and the lip 54, preferably midway between the lateral walls 52. The threaded bore 58 is directed along an angleα with respect to the longitudinal axis a′. The inserted set screw therefore extends along the angleα as well; a preferred example of the angleα is approximately 45°.
A generally wedge shaped member 60 is, in the preferred embodiment, carried by the appendage 46, with a first face 62 of the wedge 60 engaging the rear surface 51 of the appendage front wall 50 and the opposing second face 64 of the wedge 60 contoured for engaging a front surface of the trigger guard 24. The wedge 60 is truncated so that its base 66 forms the angle α with the longitudinal axis a′ when installed in the appendage 46, i.e. 45° in the preferred example.
The generally wedge shaped member 60 preferably comprises a resilient or elastomeric member having a rigid base portion. For example, the wedge 60 may be comprised of an elastomeric material (two examples of which are a polymeric elastomer and neoprene) to which a rigid plate 68 (such as a hardened steel plate) is retained on the base 66; in an example, a rectangular steel plate 68 may be fitted into a rectangular recess in the base 66, with circular protrusions 70 of the elastomeric material fitted within bores 72 through the plate 68 for retainably engaging the plate 68.
The generally wedge shaped member 60 is fitted to the appendage 46 with the substantially planar (in the preferred example) first face 62 of the wedge 60 preferably contacting the rear surface 51 of the appendage front wall 50, and with the wedge's vertical sides 74 contacting the inner surfaces of the appendage lateral walls 52. Further, the bottom edge 75 of the wedge 60 is placed upon the appendage lip 54 and the base 66 of the wedge 60 is rearwardly adjacent to the threaded bore 58, such that threading adjustment of the set screw 56 by a user will cause the tip of the set screw 56 to contact a central portion of the rigid plate 68 and urge the plate 68 along the angleα shown in
When securing the accessory mount 14 to the handgun 12, the slide stop pin originally supplied with the handgun 12 is removed from the frame bore 48. The accessory mount 14 is then applied to the handgun 12 with the bores 42 of the uprights 40 aligned with the frame transverse bore 48 and a slide stop pin inserted through the bores, with the rail 36 longitudinally extending beneath the barrel 18. A spacer 76, for example a pad of preferably resilient material such as neoprene, may be secured to the upper surface of the rail 36 for engaging the lower surface of the handgun frame 20, for spacing such frame surface from the upper surface of the rail 36 and for providing a cushion therebetween.
At this point during the installation process, the appendage 60 is positioned forwardly of the firearm's trigger guard 24 and with the appendage lateral walls 52 straddling a front section of the trigger guard 24. The contoured second face 64 of the wedge 60 is contacting a forward surface of the trigger guard 24, or is positioned slightly forwardly of the forward surface of the trigger guard 24. The user thereupon threadedly urges the set screw 56 along the angleα so that the head of the set screw 56 engages the rigid plate 68 and urges the rigid plate 68, and hence the base 66, upwardly and rearwardly along the angleα . Such urging of the plate 68 correspondingly urges the contoured second face 64 of the wedge against the front surface of the trigger guard 24, causing the wedge shaped member 62 to become wedged between the trigger guard 24 and the rear surface 51 of the appendage front wall 50, positionally stabilizing the accessory mount 14 with respect to the firearm 12.
The accessory mount 14 of the present invention is preferably utilized in combination with a slide stop (preferably offset) and pin combination where the slide stop projection 32 is slidably retained along the edge of the slide 22. One prior art slide stop and pin combination is shown in
Another example of a slide stop and pin combination where the slide stop is rotatably secured to the pin, which example comprises an aspect of the present invention, is shown in
The accessory mount body of the present invention may be made using fabrication methods well known in the art, of well-known materials typically used in the art of making firearm accessory mounts including rigid and durable materials such as polymeric materials as well as metals such as aluminum alloys.
After the accessory mount 14 has been installed on the handgun 12, an accessory such as a light beam generator apparatus may be mounted to the accessory mount 14. For example, as shown in
Thus, there has been described a preferred embodiment of an accessory mount for removably mounting an accessory to a firearm. The accessory mount of the preferred embodiment is removably secured to the firearm through utilization of a slide stop and pin combination, preferably in which the slide stop is pivotally secured to the pin. The accessory mount preferred embodiment is positionally stabilized with respect to the firearm by means of a generally wedge shaped member, preferably elastomeric, urged between the mount and the firearm's trigger guard. Other embodiments of the present invention and of its various aspects, and variations of the embodiment and its aspects described herein, may be developed without departing from the essential characteristics thereof. Accordingly, the invention should be limited only by the scope of the claims listed below.
