Archery bow with pivoted bow limbs having rotational synchronize

Details Archery bow with pivoted bow limbs having rotational synchronize Archery bow with pivoted bow limbs having rotational synchronize

1975-07-24

1977-08-16

Pinkham, Richard C.

Mechanical guns and projectors

Fluid pressure

Applied to intermediate projectile-engaging member

124 24R, 124 16, F41B 1100

Patent

active

040419274

ABSTRACT:
An archery bow which uses a single adjustable load spring instead of the usual pair of flexible bow limbs as the resilient energy medium. Bow limbs which are relatively rigid are pivoted on the handle section and are coupled together and synchronized in travel rate and equalized in forces by a single synchronizing linkage. A single adjustable ratio changing mechanism is used to provide a high mid draw force and a low full draw force and include structure to change the draw distance at which these draw forces occur.
These three features: a single adjustable spring, a single synchronizing mechanism and a single adjustable ratio changing mechanism make the bow highly efficient, easy to hold at full draw and readily adjustable for short or tall, weak or strong archers.

REFERENCES:
patent: 2714377 (1955-08-01), Mulkey
patent: 3128094 (1964-04-01), Wolf
patent: 3518980 (1970-07-01), Hamm
patent: 3744473 (1973-07-01), Nishioka
patent: 3812835 (1974-05-01), Smith

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