Compound spear sling

Details Compound spear sling Compound spear sling

1990-10-31

1992-06-30

Cuomo, Peter M.

Mechanical guns and projectors

Spring

Elastic band

124 203, 124 22, F41B 302

Patent

active

051253887

ABSTRACT:
A compound spear sling including a frame, a pair of pulleys each with a cam portion and a cable track, an elastomeric material connecting each cam to the frame, and a draw cable.
The draw cable is retracted with the spear to its ready position. As the draw cable is retracted, it rotates the cams which stretch the elastic material in such a way and in such a direction that a mechanical advantage is achieved upon reaching a READY position.
Release of the draw cable reverses rotation of the pulleys due to a snap-action of the elastomeric material.
The pulleys are positioned to enable a spear to pass therebtween subsequent to release of the draw cable.

REFERENCES:
patent: 2715895 (1955-08-01), Loveless
patent: 4169453 (1979-10-01), Hunsicker
patent: 4169546 (1979-10-01), Van House
patent: 4651707 (1987-03-01), Bozek
patent: 4703744 (1987-11-01), Taylor et al.
patent: 4926834 (1990-05-01), Chauvin

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