The present disclosure is directed to a multi-axis bow sight that permits individual pins in a pin array to be selectively and independently repositioned using a single micro-adjust. The present disclosure is also directed to a support assembly for the multi-axis bow sight that decouples bow cant from operation of the elevation and windage adjustments.
A common type of archery bow sight employs an array of vertically-spaced apart sight pins, each corresponding to a different range (distance to a target). These pins are installed in a frame or bezel, which is mounted to the riser of the bow. The spacing between the individual sight pins and the position of the sight pins within the bezel is typically adjustable to compensate for the particular shooter, the bow, the type of arrows used, and the like.
One type of adjustment system is a simple set screw that is loosened to permit the sight pin to slide in a slot formed in the bezel, such as disclosed in U.S. Pat. No. 7,832,109 (Gibbs). Once the desired location is found, the set screw is tightened. Alternatively, the sight pins are adjusted using a threaded lead screw. A separate lead screw is typically required for each sight pin to permit independent adjustable within the bezel, resulting in increased weight, cost, and complexity.
In addition to adjustments for the location of the sight pins within the bezel, many bow sights include elevation and windage adjustments that reposition the bezel with respect to the bow.
The elevation assembly 22 permits the shooter to raise and lower the bezel 24 relative to the bow sight 20 along vertical axis 26 to compensate for distance. Windage assembly 32 permits the shooter to move the bezel 24 along horizontal axis 34 to compensate for wind conditions. The operation of the elevation and windage assemblies 2232, however, is dependent on the bow 28 being held vertical, as illustrated in
Human physiology is such that when the arm muscles are in a relaxed state the shooters has a natural tendency to hold a bow at an angled or canted position. Alternatively, the shooter may have a preferred angle or cant for holding the bow. As used herein, “bow cant” refers to a shooter's natural and/or preferred angle for holding a bow relative to vertical. Right-handed shooters cant or angle the bow 28 to the left and left-handed shooters cant the bow 28 to the right. The degree of cant varies between shooters, but is generally in the range of about 20 degrees.
The Gibbs '112 patent discloses a bow cant adjustment that permits the bezel 24 to be rotated level relative to the shooter as illustrated in
The present disclosure is directed to a multi-axis bow sight that permits individual pins in a pin array to be selectively and independently adjusted using a single micro-adjust. Each sight pin can be independently engaged or disengaged from the micro-adjust lead screw. The spring loaded pin carriers automatically disengage from the micro-adjust lead screw to prevent inadvertent damage to the threads.
The present disclosure is also directed to a support assembly for the multi-axis bow sight that decouples bow cant from operation of the elevation and windage adjustments. An eye alignment assembly is preferably included with the bezel.
The present disclosure is directed to a sighting device for a bow that includes a support assembly adapted to attach to the bow. A bezel assembly is attached to the support assembly. The bezel assembly includes a micro-adjust with a lead screw located adjacent to a bezel opening. A plurality of pin carriers each include a slider selectively moveable between an engaged position coupled to the lead screw and a disengaged position. As a result, each pin carrier is adapted to be selectively and independently displaced or not displaced by rotation of the lead screw. A plurality of sight pins are coupled to the pin carriers. Each sight pin includes a sight point at a distal end located in the bezel opening and a proximal end coupled to one of the pin carriers. The sight points are generally oriented along an axis that is parallel to the lead screw. The sight points are adapted to align the bow with a target viewed through the bezel opening.
The pin carriers preferably include a spring that biases the slider into the engaged position. Each pin carriers includes a pin adjustment screw adapted to retain the slider to the disengaged position. At least one stabilizing pin parallel to the lead screw preferably extends through each of the pin carriers. The pin adjustment screws on the pin carriers bias the slider against the stabilizing pin in a locked position that retains the pin carrier in a particular location relative to the bezel opening. The slider preferably includes an indicator tab visible in the bezel opening providing an indication of the locked position.
In one embodiment, the support assembly includes a proximal portion that is adapted to attach to the bow. A distal portion is rotatably attached to the proximal portion and adapted to rotate around a longitudinal axis of the proximal portion so the sight points are oriented generally along a vertical axis while the bow is held at a bow cant greater than zero. The support assembly preferably includes a micro-adjust adapted to control the rotational position around the longitudinal axis of the distal portion relative to the proximal portion. An elevation assembly optionally attaches the distal portion to the bezel assembly. The elevation assembly is adapted to move the bezel assembly along a substantially vertical axis while the bow is held at a bow cant greater than zero. As a result, the micro-adjust decouples the shooter's bow cant from operation of the elevation assembly. An adjustable windage assembly is preferably interposed between the distal portion and the bezel assembly.
In one embodiment, an eye alignment assembly is mounted to the bezel assembly. The eye alignment assembly includes a sight point of an optical fiber positioned a distance behind an alignment indicia on a lens. An adjustment system is provided to reorient the lens relative to the bezel assembly. The eye alignment assembly provides an indication of orientation of the shooter relative to the bow in at least two degrees of freedom. The alignment indicia on the lens is aligned with the sight point on the optical fiber only when the shooter is in a predetermined relationship with respect to the bow.
The present disclosure is also directed to a method of adjusting sight pins on a bow sight for a bow. The method includes selectively moving a slider on each of a plurality of pin carriers to either an engaged position coupled to a lead screw of a micro-adjust located on a bezel assembly, or a disengaged position not engaged with the lead screw, such that each pin carrier is selectively and independently displaced or not displaced by rotation of the lead screw. The micro-adjust is rotated to displace only the pin carriers with its sliders in the engaged position, while simultaneously not displacing the pin carriers with the sliders in the disengaged position.
At least one sight pin is attached to each pin carrier so that sight points on the sight pins are located in the bezel opening. The sight points are oriented generally along an axis that is parallel to the lead screw.
In one embodiment, the shooter holds the bow at the shooter's bow cant. A micro-adjust is operated to rotate a distal portion of the segmented support assembly around the Y-axis relative to the proximal portion until the bezel assembly is substantially horizontal. Once the bezel is horizontal, an elevation micro-adjust on an elevation assembly attached to the distal portion is operated to move the bezel assembly along a substantially vertical axis while the bow is held at a bow cant greater than zero. The method also includes operating a windage assembly interposed between the distal portion and the bezel assembly to move the bezel assembly substantially horizontally.
In another embodiment, the bow is held at a preferred orientation. The shooter views an eye alignment assembly mounted on the bezel. The eye alignment assembly includes a sight point of an optical fiber and alignment indicia on a lens. The user adjusts the orientation of the eye alignment assembly relative to the bezel assembly so the sight point is aligned with the alignment indicia on a lens. Once the eye alignment assembly is adjusted for the shooters preferred bow orientation, holding the bow so the sight point on the eye alignment assembly is aligned with the alignment indicia on a lens results in the bow being at the preferred orientation.
Rotational position of the intermediate portion 58 relative to the proximal portion 56 is controlled by micro-adjust assembly 64 illustrated in
As used herein, “micro-adjust” refers to an assembly including a threaded traveler engaged with threads of a precision lead screw to precisely control the relative position of two components. For example, the threads can have a pitch of about 0.5 millimeters (50.8 threads per inch), with a sensitivity of less than about 2 micrometers. A setscrew preferably locks the micro-adjust in the desired position.
Turning back to
Threaded traveler 102 is rotatably attached to distal portion 90 in cavity 104 by polymeric washers 70. Lead screw 106 extends through holes 108 in the intermediate portion 58 and engages with the threads in the traveler 102. Since the cavity 104 is located offset from the Z-axis 96, rotation of knob 110 displaces the traveler 102 left or right, resulting in rotational movement 94 of the distal portion 90 relative to the intermediate portion 58 (see e.g.,
Windage assembly 118 illustrated in
Ball bearing 132 located in recess 133 in windage block 120 is preferably biased by spring 134 against detents on knob 128. Pins 136 extend through holes 138 in the distal portion 90 to stabilize movement of the windage block 120 along the X-axis 130.
As best illustrated in
Bezel assembly 164 is attached to the bezel traveler 156 by fastener 166. A variety of different bezel assemblies can be attached to the bezel traveler 156 in accordance to embodiments of the present invention. The illustrated bezel assembly 164 includes opening that extends to bezel opening 170 of bezel 172. A battery powered light assembly 176 can optionally be attached to the opening. The light is transmitted through the opening 168 into the bezel opening 170 to illuminate the sight points 174 or targeting reticule.
Set screw 200 (see
Since this adjustment is specific to the particular shooter, once the adjustment is completed the set screw 200 is tightened to secure the micro-adjust 64. Because the interface between the proximal portion 56 and intermediate portion 58 is located closest to the bow, the windage assembly 118 and elevation assembly 150 both rotate around the Y-axis 54 in direction 190 with the bezel 172. As a result, subsequent adjustment of the elevation assembly 150 causes the bezel 172 and sight pin 174 to travel along a vertical axis 196. Similarly, an adjustment of the windage assembly 118 causes the bezel 172 to travel along a horizontal axis 198.
Slider 316 is configured to move inside carrier 306 along axis 318. The slider 316 includes first opening 320 with washer 322 and second opening 324 with washer 326. Distal edge 328 of the second opening 324 includes threads 330 configured to couple with lead screw 332 on the bezel 172 (see
Pin adjustment screw 342 is provided at the proximal edge 340 of the carrier 306 to shift the slider 316 in the opposite direction 344 to disengage the threads 330 on the slider 316 from the lead screw 332. When fully advanced, the pin adjustment screws 342 presses proximal edges 362, 364 of the openings 320, 324 in the slider 316 against the washers 322, 326 and the stabilizing pins 352, 356, respectively, securing the pin 300 in the locked position relative to the bezel opening 170. In the locked position, indicator tab 365 extends into the bezel opening 170 to provide an indication of the locked position. Since each sight pin assembly 300 includes a separate pin adjustment screw 342, the sight pin assembly 300 can be independently and selectively adjusted within the bezel opening 170.
As best illustrated in
Fiber optics extending from the openings 308 in the housings 306 exit the side of the bezel 172 and are retained under covering 380. The covering 380 permits light to pass through to illuminate the fiber optics.
In operation, knob 360 is used to rotate the lead screw 332 of the micro-adjust 382, which raises and lowers the pins 300 along axis 368 that is parallel to the Z-axis 96. Once a particular pin 300 is in the desired location, the shooter advances the pin adjustment screws 342 (see also
The present pin array adjustment system 370 permits the single micro-adjust 382 to selectively and independently position each of the plurality of sight pins 300. If one of the sight pins 300 contacts an adjacent sight pin 300 that is already secured in the desired location, further rotation of the lead screw 332 will overcome the spring force 366 and permits the slider 316 to be displaced in the direction 344, thereby preventing damage to the threads 330 on the slider 316 or the lead screw 332.
The present bow sight preferably includes an eye alignment assembly 400 that provides an indication of orientation of a shooter's eye in the pitch and yaw directions relative to the bow. The eye alignment assembly 400 assists the shooter to consistently position her body in the correct orientation relative to the bow, so that over time the bow becomes an extension of the user's body. The eye alignment assembly decouples the user's line of sight from the operating axis/plane of the bow. Suitable eye alignment assemblies are disclosed in U.S. Pat. Nos. 7,814,668 (Pulkrabek et al); 7,921,570 (Pulkrabek et al.); 8,079,153 (Pulkrabek et al.); and U.S. Patent Publication 2011/0167654 (Pulkrabek), the entire disclosures of which are hereby incorporated by reference.
As best illustrated in
In use, when alignment indicia 406 on lens 404 is aligned with sight point 410 on optical fiber 408, the shooter's eye is in a predetermined relationship with respect to the eye alignment assembly 400, and hence, the present bow sight 50. That is, alignment indicia 406 and sight point 410 can only be viewed in a predetermined way from a predetermined approximate angle, assuring that the shooter's shooting eye is consistently positioned relative to the present sight 50.
The eye alignment assembly 400 includes adjustment mechanisms 420 for pitch (rotation in a plane perpendicular to the Y-axis 130) and yaw (rotation in a plane perpendicular to the Z-axis 96). The adjustment mechanism 420 permits the eye alignment assembly 400 to be easily adjusted for the shooting style of a particular shooter.
In the illustrated embodiment, the tubular structure 402 includes at least one elastomeric O-ring 422 that engage with the bezel 172. Adjustment screw 424 attached to cover 380 displaces the tubular structure 402 up and down (pitch) in a plane perpendicular to the Y-axis 130 by compressing the O-rings 422. Adjustment screw 426 attached to the bezel 172 displaces the tubular structure 402 left and right (yaw) in a plane perpendicular to the Z-axis 96 by compressing the O-rings 422. The adjustment screws 424, 426 preferably include tooth portions 428. Bearings 430 are preferably biased by springs 432 into engagement with the tooth portions 428 to provide feedback during rotation of the adjustment screws 424, 426 and to prevent inadvertent adjustments.
Where a range of values is provided, it is understood that each intervening value, to the tenth of the unit of the lower limit unless the context clearly dictates otherwise, between the upper and lower limit of that range and any other stated or intervening value in that stated range is encompassed within the disclosure. The upper and lower limits of these smaller ranges which may independently be included in the smaller ranges is also encompassed within the disclosure, subject to any specifically excluded limit in the stated range. Where the stated range includes one or both of the limits, ranges excluding either both of those included limits are also included in the disclosure.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which these inventions belong. Although any methods and materials similar or equivalent to those described herein can also be used in the practice or testing of the present inventions, the preferred methods and materials are now described. All patents and publications mentioned herein, including those cited in the Background of the application, are hereby incorporated by reference to disclose and described the methods and/or materials in connection with which the publications are cited.
The publications discussed herein are provided solely for their disclosure prior to the filing date of the present application. Nothing herein is to be construed as an admission that the present inventions are not entitled to antedate such publication by virtue of prior invention. Further, the dates of publication provided may be different from the actual publication dates which may need to be independently confirmed.
Other embodiments of the invention are possible. Although the description above contains much specificity, these should not be construed as limiting the scope of the invention, but as merely providing illustrations of some of the presently preferred embodiments of this invention. It is also contemplated that various combinations or sub-combinations of the specific features and aspects of the embodiments may be made and still fall within the scope of the inventions. It should be understood that various features and aspects of the disclosed embodiments can be combined with or substituted for one another in order to form varying modes of the disclosed inventions. Thus, it is intended that the scope of at least some of the present inventions herein disclosed should not be limited by the particular disclosed embodiments described above.
Thus the scope of this invention should be determined by the appended claims and their legal equivalents. Therefore, it will be appreciated that the scope of the present invention fully encompasses other embodiments which may become obvious to those skilled in the art, and that the scope of the present invention is accordingly to be limited by nothing other than the appended claims, in which reference to an element in the singular is not intended to mean “one and only one” unless explicitly so stated, but rather “one or more.” All structural, chemical, and functional equivalents to the elements of the above-described preferred embodiment that are known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the present claims. Moreover, it is not necessary for a device or method to address each and every problem sought to be solved by the present invention, for it to be encompassed by the present claims. Furthermore, no element, component, or method step in the present disclosure is intended to be dedicated to the public regardless of whether the element, component, or method step is explicitly recited in the claims.