US 10,267,590 B1Granted

Spiral-wound split-buss let-out mechanism for a compound archery bow

AssigneeBowTech, Inc.

InventorsDylan G. Rinker, Nicholas C. Obteshka, Tony E. Hyde, Allen C. Rasor, Jr.

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Abstract

A pulley assembly for a compound archery bow comprises an axle, a draw cable pulley, and a pair of split-buss let-out pulleys positioned on opposite sides of the draw cable pulley. Each secondary cable of a split-buss end of a power cable is wound in a spiral arrangement around a corresponding split-buss let-out pulley. As the bow is drawn, the pulley assembly rotates, the draw cable pulley lets out a draw cable, and each split-buss let-out pulley lets out the corresponding secondary cable. The spiral arrangement results in lateral movement, away from the draw cable pulley, of a contact point of the corresponding secondary power cable on each split-buss let-out pulley as the bow is drawn. The spiral arrangement can include a corresponding spiral groove on each split-buss let-out pulley.

Claims25

Dependent claims

A pulley assembly for a compound archery bow, the pulley assembly comprising an axle, a draw cable pulley, and a pair of split-buss let-out pulleys positioned on opposite sides of the draw cable pulley, wherein:

(a) the axle is structurally arranged so as to (i) define a first pulley assembly transverse rotation axis and (ii) be rotatably mounted on a first limb of a compound archery bow to rotate about the first pulley assembly axis;
(b) the draw cable pulley is (i) non-rotatably mounted on the axle and (ii) structurally arranged so as to let out, from a circumferential draw cable groove thereof, a draw cable of the archery bow, when the bow is drawn and the draw cable pulley rotates with the axle about the first pulley assembly axis;
(c) each split-buss let-out pulley is (i) non-rotatably mounted on the axle, and (ii) structurally arranged so as to let out a corresponding one of two secondary power cables of a split-buss end of a first power cable of the archery bow, when the bow is drawn and the pair of split-buss let-out pulleys rotates with the axle about the first pulley assembly axis;
and
(d) each split-buss let-out pulley is structurally arranged to have wound therearound the corresponding secondary power cable in a spiral arrangement so that, when the bow is drawn, as the pulley assembly rotates and the corresponding secondary power cable is let-out from the split-buss let-out pulley, a contact point of the corresponding secondary power cable on the split-buss let-out pulley moves laterally away from the draw cable pulley.

2 more elements

A compound archery bow comprising:

(a) a substantially rigid riser;
(b) a first resilient bow limb extending from a first end portion of the riser and a second resilient bow limb extending from a second end portion of the riser;
(c) a draw cable and a first power cable;
(d) a first pulley assembly comprising a first axle, a first draw cable pulley, and a pair of split-buss let-out pulleys positioned on opposite sides of the first draw cable pulley, wherein (i) the first axle is rotatably mounted on the first limb so as to define and rotate about a first pulley assembly transverse rotation axis, (ii) the first draw cable pulley is non-rotatably mounted on the first axle, and (iii) the first draw cable pulley is structurally arranged so as to let out the draw cable, from a circumferential draw cable groove of the first draw cable pulley, when the bow is drawn and the first draw cable pulley rotates with the first axle about the first pulley assembly axis;
and
(e) a second pulley assembly comprising a second axle, a second draw cable pulley, and a take-up mechanism for the first power cable, wherein (i) the second axle is mounted on the second limb so as to define a second pulley assembly transverse rotation axis, (ii) the second draw cable pulley is mounted on the second axle so as to rotate about the second pulley assembly axis, (iii) the second draw cable pulley is structurally arranged so as to let out the draw cable, from a circumferential draw cable groove of the second draw cable pulley, when the bow is drawn and the second draw cable pulley rotates about the second pulley assembly axis, (iv) the first-power-cable take-up mechanism is non-rotatably mounted on the second axle or on the second draw cable pulley, and (v) the first-power-cable take-up mechanism is structurally arranged so as to take-up a take-up end of the first power cable, when the bow is drawn and the first-power-cable take-up mechanism rotates with the second draw cable pulley about the second pulley assembly axis,
wherein:
(f) each split-buss let-out pulley of the first pulley assembly is (i) non-rotatably mounted on the first axle, and (ii) structurally arranged so as to let out a corresponding one of two secondary power cables of a split-buss end of the first power cable, when the bow is drawn and the pair of split-buss let-out pulleys rotates with the first axle about the first pulley assembly axis;
and
(g) each split-buss let-out pulley is structurally arranged to have wound therearound the corresponding secondary power cable of the first power cable in a spiral arrangement so that, when the bow is drawn, as the first pulley assembly rotates and the corresponding secondary power cable is let-out from the split-buss let-out pulley, a contact point of the corresponding secondary power cable on the split-buss let-out pulley moves laterally away from the first draw cable pulley.

7 more elements

A compound archery bow comprising:

(a) a substantially rigid riser;
(b) a first resilient bow limb extending from a first end portion of the riser and a second resilient bow limb extending from a second end portion of the riser;
(c) a draw cable and a first power cable;
(d) a first pulley assembly comprising a first axle, a first draw cable pulley, and a split-buss let-out pulleys positioned on one side of the first draw cable pulley, wherein (i) the first axle is rotatably mounted on the first limb so as to define and rotate about a first pulley assembly transverse rotation axis, (ii) the first draw cable pulley is non-rotatably mounted on the first axle, and (iii) the first draw cable pulley is structurally arranged so as to let out the draw cable, from a circumferential draw cable groove of the first draw cable pulley, when the bow is drawn and the first draw cable pulley rotates with the first axle about the first pulley assembly axis;
and
(e) a second pulley assembly comprising a second axle, a second draw cable pulley, and a take-up mechanism for the first power cable, wherein (i) the second axle is mounted on the second limb so as to define a second pulley assembly transverse rotation axis, (ii) the second draw cable pulley is mounted on the second axle so as to rotate about the second pulley assembly axis, (iii) the second draw cable pulley is structurally arranged so as to let out the draw cable, from a circumferential draw cable groove of the second draw cable pulley, when the bow is drawn and the second draw cable pulley rotates about the second pulley assembly axis, (iv) the first-power-cable take-up mechanism is non-rotatably mounted on the second axle or on the second draw cable pulley, and (v) the first-power-cable take-up mechanism is structurally arranged so as to take-up a take-up end of the first power cable, when the bow is drawn and the first-power-cable take-up mechanism rotates with the second draw cable pulley about the second pulley assembly axis,
wherein:
(f) the split-buss let-out pulley of the first pulley assembly is (i) non-rotatably mounted on the first axle, and (ii) structurally arranged so as to let out a first secondary power cable of a split-buss end of the first power cable, when the bow is drawn and the split-buss let-out pulley rotates with the first axle about the first pulley assembly axis;
(g) the split-buss let-out pulley is structurally arranged to have wound therearound the first secondary power cable in a spiral arrangement so that, when the bow is drawn, as the first pulley assembly rotates and the first secondary power cable is let-out from the split-buss let-out pulley, a contact point of the first secondary power cable on the split-buss let-out pulley moves laterally away from the first draw cable pulley;
(h) the split-buss end of the power cable includes a yoke or coupling member and the first power cable is attached to the yoke or coupling member;
(i) the split-buss end of the power cable includes a single, discrete, additional cable segment that is (i) looped around the yoke or coupling member, (ii) attached at a first end thereof to the split-buss let-out pulley to form the first secondary power cable, and (iii) attached at a second end thereof to the first axle or first bow limb to form a second secondary power cable;
and
(j) the yoke or coupling member includes a bearing structurally arranged so as to permit movement of the yoke or coupling member along the additional cable segment, thereby permitting alteration of relative lengths of the first and second secondary power cables as the bow is drawn, the first secondary power cable is let out from the split-buss let-out pulley, and the yoke or coupling member moves along the additional cable segment.

10 more elements

Dependencies are inferred from the claim text.