Snap-acting over-center chain saw safety brake and method of ope

Details Snap-acting over-center chain saw safety brake and method of ope Snap-acting over-center chain saw safety brake and method of ope

1976-01-20

1977-05-31

Halvosa, George E. A.

Brakes

Operators

Spring

30381, 74 97, 188 77R, 192 80, 192 89R, B60T 1304

Patent

active

040263924

ABSTRACT:
A chain saw safety brake including a snap-acting, over-center actuating mechanism.
A chain saw safety brake and method of operation characterized by an actuation accelerator interposed between a brake mechanism and a brake actuating mechanism. A biasing means is operable to bias the brake actuating means toward a nonactuating position with a relatively lower biasing force. The biasing means is operable to bias the brake actuating means toward an actuating position with a relatively higher biasing force.

REFERENCES:
patent: 1393111 (1921-10-01), Getchell
patent: 2621538 (1952-12-01), Bechman et al.
patent: 2900970 (1959-08-01), Sims et al.
patent: 3213707 (1965-10-01), McCann et al.
patent: 3776331 (1973-12-01), Gustafsson
patent: 3923126 (1975-12-01), Bidanset

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