Brake holding apparatus

Details Brake holding apparatus Brake holding apparatus

1984-03-12

1986-04-01

Herrmann, Allan D.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

70255, 180287, 188353, 192 0049, 192 0094, 192 3H, B60K 4124

Patent

active

045792020

ABSTRACT:
Brake holding apparatus for use in a vehicle having a fluid pressure operated braking system including a master cylinder and at least one brake cylinder. The apparatus includes a trapping valve movable to an open position allowing fluid communication between the master and brake cylinders, and to a closed position blocking this fluid communication so as to trap fluid pressure in the brake cylinder. The trapping valve is biased for movement to its open position. Means are provided for moving the trapping valve to its closed position. A bypass valve allows fluid communication from the master cylinder to the brake cylinder, but blocks fluid communication in the opposite direction. The trapping valve is fluid pressure balanced such that fluid pressure trapped in the brake cylinder has no effect on the position of the valve.

REFERENCES:
patent: 2181699 (1939-11-01), Leichsenring, Jr.
patent: 2197721 (1940-04-01), Goepfrich
patent: 2201125 (1940-05-01), Freeman
patent: 2245958 (1941-06-01), Barr et al.
patent: 2277584 (1942-03-01), Freeman
patent: 2522835 (1950-09-01), Mayrath
patent: 2690824 (1954-10-01), Forman
patent: 2938611 (1960-05-01), Cooke
patent: 3433336 (1969-03-01), Mizuno
patent: 3698505 (1972-10-01), Webley
patent: 4515259 (1985-05-01), Ha

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