COMPOUND ARCHERY CROSSBOW
First Claim
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1. A compound archery crossbow comprising:
- a) a stock with a barrel;
b) at least one right limb and at least one left limb, wherein the at least one right limb and at least one left limb are mounted to the stock by a riser;
c) a first cam and a second cam, wherein the first cam comprises a first let-out groove, a second let-out groove and a take-up groove, and the second cam comprises a first let-out groove, a second let-out groove and a take-up groove;
d) a first power cable extending from the first let-out groove of the first cam to the take-up groove of the second cam;
e) a second power cable extending from the first let-out groove of the second cam to the take-up groove of the first cam;
f) a bowstring extending from the second let-out groove of the first cam to the second let-out groove of the second cam;
g) a first axel assembly that extends through the first cam and the at least one right limb; and
h) a second axel assembly that extends through the second cam and the at least one left limb,wherein draw of the bowstring from the second let-out groove of the first and second cams rotates the first and second cams about the first and second axel assemblies and lets out portions of the first and second power cables from the first let-out groove on the first and second cams while taking up portions of the first and second power cables in the take up grooves of the first and second cams.
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Abstract
The invention is directed to a compound archery crossbow wherein the power cables and the bowstring remain substantially parallel allowing the bowstring to be positioned for increased power and accuracy of an arrow and/or wherein the power stroke has been extended by positioning the bowstring farther from the string catch.
58 Citations
35 Claims
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1. A compound archery crossbow comprising:
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a) a stock with a barrel; b) at least one right limb and at least one left limb, wherein the at least one right limb and at least one left limb are mounted to the stock by a riser; c) a first cam and a second cam, wherein the first cam comprises a first let-out groove, a second let-out groove and a take-up groove, and the second cam comprises a first let-out groove, a second let-out groove and a take-up groove; d) a first power cable extending from the first let-out groove of the first cam to the take-up groove of the second cam; e) a second power cable extending from the first let-out groove of the second cam to the take-up groove of the first cam; f) a bowstring extending from the second let-out groove of the first cam to the second let-out groove of the second cam; g) a first axel assembly that extends through the first cam and the at least one right limb; and h) a second axel assembly that extends through the second cam and the at least one left limb, wherein draw of the bowstring from the second let-out groove of the first and second cams rotates the first and second cams about the first and second axel assemblies and lets out portions of the first and second power cables from the first let-out groove on the first and second cams while taking up portions of the first and second power cables in the take up grooves of the first and second cams. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A compound archery crossbow comprising:
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a) a stock with a barrel; b) an right pair and a left pair of limbs, wherein the right pair of limbs has a first member comprising a distal end and a proximal end and a second member comprising a distal end and a proximal end and the left pair of limbs has a first member comprising a distal end and a proximal end and a second member comprising a distal end and a proximal end, wherein the right pair and the left pair of limbs are mounted to the stock by a riser, wherein an attachment means attaches the proximal end of the first member and the second member of the right pair of limbs and the proximal end of the first member and the second member of the left pair of limbs to the riser, and wherein the first member and the second member of the right pair of limbs are parallel and the first member and the second member of the left pair of limbs of limbs are parallel; c) a first cam and a second cam, wherein the first cam comprises a first let-out groove, a second let-out groove and a take-up groove, and the second cam comprises a first let-out groove, a second let-out groove and a take-up groove, wherein the second let-out groove is positioned between the first let-out groove and the take-up groove in the first and second cam, wherein the first let-out groove, the second let-out groove and the take-up groove of the second cam and the first let-out groove, the second let-out groove and the take-up groove of the first cam are inverted with respect to each other; d) a first power cable extending from the first let-out groove of the first cam to the take-up groove of the second cam; e) a second power cable extending from the first let-out groove of the second cam to the take-up groove of the first cam; f) a bowstring extending from the second let-out groove of the first cam to the second let-out groove of the second cam, wherein the bowstring is positioned between the riser and the first and second power cables; and g) a first axel assembly extending through the first cam and the distal ends of the first member and second member of the right pair of limbs and a second axel assembly extending through the second cam and the distal ends of the first member and second member of the left pair of limbs, wherein draw of the bowstring away from the riser lets out the bowstring from the second let-out groove of the first and second cam, rotates around the first and second axel assembly and lets out portions of the first and second power cables from the first let-out groove on the first and second cam. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A compound archery crossbow comprising:
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a) a stock with a barrel; b) limbs mounted to the stock by a riser; c) a first cam and a second cam, wherein the first cam comprises at least a first let-out groove and a take-up groove, and the second cam comprises at least a first let-out groove and a take-up groove; d) a first axel assembly extending through the first cam and the limbs; e) a second axel assembly extending through the second cam and the limbs; f) at least one independent groove traversed by the first axel assembly and at least one independent groove traversed by the second axel assembly; g) a first power cable extending from an anchor at the at least one independent groove traversed by the first axel assembly to the take-up groove of the second cam; h) a second power cable extending from an anchor at the at least one independent groove traversed by the second axel assembly to the take-up groove of the first cam; i) a bowstring extending from the first let-out groove of the first cam to the at least first let-out groove of the second cam; wherein draw of the bowstring from the at least first let-out groove of the first cam and the at least first let-out groove of the second cam rotates the first cam around the first axle assembly and the second cam around the second axle assembly such that the a portion of the first power cable is pulled into the take-up groove on the first cam and a portion of the second power cable is pulled into the take-up groove on the second cam. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification