Crossbow cam system
First Claim
Patent Images
1. A crossbow assembly comprising:
- a stock assembly;
first and second cams rotatably mounted in respective fixed positions on said stock assembly;
a bowstring extending between said first and second cams, said bowstring having two ends and a central medial portion extending directly from said first cam to said second cam and having end lengths wrapped around a track of each of said first and second cams, wherein one of said bowstring ends is anchored to said first cam and the other of said bowstring ends is anchored to said second cam;
a pair of flexible limbs extending laterally from said stock assembly to limb tips; and
,first and second pulleys, wherein one of said pulleys is mounted adjacent the tip of each of said flexible limbs.
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Abstract
Certain embodiments of the present disclosure describe a crossbow that includes a stock assembly. Flexible limbs extend laterally from the stock assembly. Cams are rigidly attached directly to the stock assembly or to extensions from the stock assembly, typically within an area defined by the limbs.
119 Citations
20 Claims
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1. A crossbow assembly comprising:
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a stock assembly; first and second cams rotatably mounted in respective fixed positions on said stock assembly; a bowstring extending between said first and second cams, said bowstring having two ends and a central medial portion extending directly from said first cam to said second cam and having end lengths wrapped around a track of each of said first and second cams, wherein one of said bowstring ends is anchored to said first cam and the other of said bowstring ends is anchored to said second cam; a pair of flexible limbs extending laterally from said stock assembly to limb tips; and
,first and second pulleys, wherein one of said pulleys is mounted adjacent the tip of each of said flexible limbs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A crossbow assembly comprising:
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a stock assembly; first and second cams rotatably mounted via axles to respective fixed locations on said stock assembly; a bowstring extending between said first and second cams, said bowstring having two ends and a central medial portion extending directly from said first cam to said second cam and having end lengths wrapped around a track of each of said first and second cams, wherein one of said bowstring ends is anchored to said first cam and the other of said bowstring ends is anchored to said second cam; a pair of flexible limbs extending laterally from said stock assembly to limb tips; first and second pulleys, wherein one of said pulleys is mounted adjacent the tip of each of said flexible limbs; and
,wherein the axle-to-axle distance between said first cam and said second cam remains fixed as the bowstring is drawn. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A crossbow assembly comprising:
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a stock assembly; first and second cams rotatably mounted via axles to respective fixed points on said stock assembly; a bowstring extending between said first and second cams, said bowstring having two ends and a central medial portion extending directly from said first cam to said second cam and having end lengths wrapped around a track of each of said first and second cams, wherein one of said bowstring ends is anchored to said first cam and the other of said bowstring ends is anchored to said second cam; wherein said medial portion of said bowstring is positioned forward of said first and second cams when said bowstring is undrawn; wherein the axle-to-axle distance between said first cam and said second cam remains fixed as the bowstring is drawn; and
,a pair of flexible limbs extending laterally from said stock assembly wherein said flexible limbs define an inner limb area and the entirety of said first and second cams are located within said inner limb area. - View Dependent Claims (19, 20)
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Specification