Archery bow

Details Archery bow Archery bow

1985-07-15

1987-03-03

Pinkham, Richard C.

Mechanical guns and projectors

Spring

Bow

124DIG1, F41B 500

Patent

active

046467084

ABSTRACT:
An improved archery bow wherein draw force let off and continuous concurrent storing of energy is achieved by articulate bow limbs jointed at pivotal joints between energy storing resilient spring portions and shiftable bow tip-portions each having bow tips engaging the bowstring. The bow tips are shiftable about the pivotal joints through forward, neutral and rearward positions. Tendon cables coact with the bow tips resilient spring portions, and the bowstring for yieldingly spring biasing the bowstring and bow tips in the forward position and the bowstring in a rest position. The bowstring and tendon cables are coupled diametrically opposite each other at the bow tips so that forces acting through the tendon cables and the bowstring are resolved or split into force components. Some of these force components act through the bow tip-portions to the pivot joints during the shifting of the bow tips from the forward position to the rearward position to effect a draw force let off at the nocking point of the bowstring. Rollers are positioned in cooperative relationship with the spring portions of the bow limbs and the tendon cables to provide continuous transfer of energy to the spring portions of the bow limbs throughout the shifting of the bow tips from the forward position to the rearward position and movement of the bowstring from the rest position to a fully drawn position.

REFERENCES:
patent: 3595213 (1971-07-01), Storer
patent: 3993039 (1976-11-01), Groves et al.

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