Adjustable pulley assembly for a compound archery bow

摘要

A pulley assembly for a compound bow comprises a draw cable pulley rotatable about a first axis, a mounting member attached to the draw cable pulley and adjustable among multiple positions, and a power cable pulley attached to the mounting member and adjustable among multiple positions about a second axis. Movement of the mounting member shifts the second axis relative to the first axis. Movement of one or both of the mounting member or power cable pulley alters one or more of the bow's draw force curve, draw length, draw weight, or stored energy.

主权项

1. A pulley assembly for a compound archery bow, the pulley assembly comprising a draw cable pulley, a mounting member substantially rigidly attached to the draw cable pulley, and a power cable pulley substantially rigidly attached to the mounting member, wherein:
the draw cable pulley is structurally arranged so as to (i) define a first pulley assembly transverse rotation axis, (ii) be mounted on a first limb of an archery bow to rotate about the first pulley assembly axis, (iii) receive a first end of a draw cable of the bow in a circumferential draw cable journal of the draw cable pulley, and (iv) let out the first end of the draw cable when the bow is drawn and the draw cable pulley rotates about the first pulley assembly axis; one or both of the draw cable pulley and the mounting member are structurally arranged so as to enable substantially rigid attachment of the mounting member to the draw cable pulley in any one of a set of multiple mounting member positions; one or both of the mounting member and the power cable pulley are structurally arranged so as to enable substantially rigid attachment of the power cable pulley to the mounting member in any one of a set of multiple power cable pulley rotational positions, and the set of multiple power cable pulley rotational positions defines a power cable pulley rotation axis substantially parallel to the first pulley assembly rotation axis; the power cable pulley member is structurally arranged so as to (i) receive a power cable of the bow in a circumferential power cable journal of the power cable pulley, and (ii) take up the power cable when the bow is drawn and the draw cable pulley rotates about the first pulley assembly axis; and each different position of the mounting member results in a corresponding different position of the power cable pulley rotation axis relative to the first pulley assembly rotation axis.