Moment transfer pulley system for compound archery bows

Details Moment transfer pulley system for compound archery bows Moment transfer pulley system for compound archery bows

1986-09-30

1988-09-13

Pinkham, Richard C.

Mechanical guns and projectors

Spring

Bow

124DIG1, F41B 500

Patent

active

047701544

ABSTRACT:
A compound bow (20) with a moment transfer pulley system (28) for reducing the holding force at the maximum bowstring draw position and for attaining and maintaining a high amount of stored energy. The moment transfer pulley system includes a pulley assembly (38) having a primary axle hole (76) and a primary axle (44) upon which the pulley assembly rotates. A secondary axle (64) is mounted to the pulley assembly. Mounted on the bow limb tip (24) on opposite sides of the pulley assembly are two moment transfer cams (52 and 54). These transfer cams are held in fixed relationship to the limb 24. The transfer cams include a notch (78) for receiving the secondary axle (64). As the bow reaches the full draw position the secondary axle (64) is received into the notches (78).

REFERENCES:
patent: 4060066 (1977-11-01), Kudlacek
patent: 4078537 (1978-03-01), Carella
patent: 4660536 (1987-04-01), McPherson

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