Cable take-up or let-out mechanism for a compound archery bow
First Claim
1. A compound archery bow comprising:
- a substantially rigid riser;
a first resilient bow limb extending from a first end portion of the riser;
a second resilient bow limb extending from a second end portion of the riser;
a first pulley member connected to the first bow limb and rotatable relative to the first bow limb around a first rotation axis, which first pulley member includes a first draw cable journal, a power cable take-up mechanism, and first and second axle segments arranged to extend from opposite sides of the first pulley member;
a second pulley member connected to the second bow limb and rotatable relative to the second bow limb around a second rotation axis, which second pulley member includes a second draw cable journal;
a draw cable engaged with the first and second draw cable journals and arranged to rotate the first and second pulley members as the bow is drawn and the draw cable is let out from the first draw cable journal; and
a power cable engaged to be taken up by the power cable take-up mechanism as the bow is drawn and the first pulley member rotates,wherein;
the axle segments are substantially coaxial with the first rotation axis, and rotatably connect the first pulley member to a corresponding portion of the first bow limb;
the first pulley member is arranged so that an effective lever arm of the power cable take-up mechanism decreases, during a latter portion of drawing the bow, from a distance that is greater than a radius of the axle segments to a minimum distance that is less than that radius; and
the first pulley member is further arranged so that, with the bow fully drawn, at least a portion of the power cable passes through at least a portion of a space between the first and second axle segments.
7 Assignments
0 Petitions
Accused Products
Abstract
A compound archery bow comprises a riser, limbs, pulley members connected to the limbs, a draw cable, and a power cable. A first pulley member includes a draw cable journal, a power cable take-up mechanism, and coaxial axle segments extending from opposite sides of the pulley member. The effective lever arm of the power cable take-up mechanism decreases, during a latter portion of drawing the bow, from a distance that is greater than a radius of the axle segments to a minimum distance that is less than that radius. The first pulley member is further arranged so that, with the bow fully drawn, at least a portion of the power cable passes through at least a portion of a space between the first and second axle segments.
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Citations
24 Claims
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1. A compound archery bow comprising:
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a substantially rigid riser; a first resilient bow limb extending from a first end portion of the riser; a second resilient bow limb extending from a second end portion of the riser; a first pulley member connected to the first bow limb and rotatable relative to the first bow limb around a first rotation axis, which first pulley member includes a first draw cable journal, a power cable take-up mechanism, and first and second axle segments arranged to extend from opposite sides of the first pulley member; a second pulley member connected to the second bow limb and rotatable relative to the second bow limb around a second rotation axis, which second pulley member includes a second draw cable journal; a draw cable engaged with the first and second draw cable journals and arranged to rotate the first and second pulley members as the bow is drawn and the draw cable is let out from the first draw cable journal; and a power cable engaged to be taken up by the power cable take-up mechanism as the bow is drawn and the first pulley member rotates, wherein; the axle segments are substantially coaxial with the first rotation axis, and rotatably connect the first pulley member to a corresponding portion of the first bow limb; the first pulley member is arranged so that an effective lever arm of the power cable take-up mechanism decreases, during a latter portion of drawing the bow, from a distance that is greater than a radius of the axle segments to a minimum distance that is less than that radius; and the first pulley member is further arranged so that, with the bow fully drawn, at least a portion of the power cable passes through at least a portion of a space between the first and second axle segments. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A pulley member for a compound archery bow, the pulley member comprising:
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first and second substantially coaxial axle segments arranged to extend from opposite sides of the pulley member and to rotatably connect the pulley member to a bow limb of a compound archery bow, which axle segments substantially define a rotation axis of the pulley member relative to the bow limb; a draw cable journal connected to the axle segments and arranged to let out a draw cable as the bow is drawn and the pulley member rotates about the rotation axis; and a power cable take-up mechanism arranged to take up a power cable as the bow is drawn and the pulley member rotates about the rotation axis, wherein; the pulley member is arranged so that an effective lever arm of the power cable take-up mechanism decreases during a latter portion of drawing the bow from a distance that is greater than a radius of the axle segments to a distance that is less than that radius; and the pulley member is further arranged so that, with the bow fully drawn, at least a portion of the power cable passes through at least a portion of a space between the first and second axle segments. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification