Archery bow with circular string track
AssigneeMcp IP, LLC
InventorsMathew A. McPherson, Gary L. Simonds
Life of this patent
Estimating the term…
Abstract
In some embodiments, an archery bow comprises a riser, a first limb supported by the riser and a second limb supported by the riser. A first rotatable member is supported by the first limb and arranged to rotate on a first axis and a second rotatable member is supported by the second limb and arranged to rotate on a second axis. The first rotatable member comprises a first bowstring track comprising a first portion and a second portion, the first portion having a constant radius and a center located on the first axis, the second portion having a varying radius. A bowstring comprises a first end attached to the first rotatable member and a second end attached to the second rotatable member.
Claims20
An archery bow comprising:
- riser;
- a first limb supported by said riser;
- a second limb supported by said riser;
- a first rotatable member supported by said first limb and arranged to rotate on a first axis, said first rotatable member comprising a bowstring track;
- a second rotatable member supported by said second limb and arranged to rotate on a second axis;
- and
- a bowstring comprising a first end attached to said first rotatable member, the bowstring extending to said second rotatable member;
- wherein said bowstring track comprises a first portion and a second portion, said first portion comprising a circular arc having a constant radius from the first axis, said circular arc extending at least 90 degrees about said first axis, said second portion comprising a non-circular arc having a varying radius from said first axis, said non-circular arc extending at least 90 degrees about said first axis, said constant radius being greater than any portion of said varying radius.
An archery bow comprising:
- a riser;
- a first limb supported by said riser;
- a second limb supported by said riser;
- a first rotatable member supported by said first limb and arranged to rotate on a first axis, said first rotatable member comprising a bowstring track and a first cam track;
- a second rotatable member supported by said second limb and arranged to rotate on a second axis, said second rotatable member comprising a bowstring track and a second cam track;
- a first power cable comprising a segment in contact with said first cam track;
- and
- a second power cable comprising a segment in contact with said second cam track;
- and
- a bowstring extending between said first rotatable member and said second rotatable member;
- wherein an outer periphery of the first rotatable member comprises a first portion and a second portion, said first portion comprising a circular arc having a constant radius from the first axis, said circular arc extending at least 90 degrees about the first axis, said second portion comprising an arc having a varying radius from the first axis, said outer periphery being continuously concave with respect to the first axis.
An archery bow comprising:
- a riser;
- a first limb supported by said riser;
- a second limb supported by said riser;
- a bowstring;
- a first rotatable member supported by said first limb and arranged to rotate on a first axis, said first rotatable member comprising a bowstring track having a working portion, said working portion arranged to feed out said bowstring as the bow is drawn;
- and
- a second rotatable member supported by said second limb and arranged to rotate on a second axis, said second rotatable member comprising a second bowstring track;
- said working portion comprising a first portion and a second portion, said first portion comprising a circular arc having a constant radius from the first axis, said circular arc comprising approximately 50% of said working portion, said second portion comprising an arc having a varying radius from the first axis, said second portion occupying the remainder of said working portion, said constant radius being greater than any portion of said varying radius.
Dependencies are inferred from the claim text.