Air brake system with pressure holding valve

Details Air brake system with pressure holding valve Air brake system with pressure holding valve

1977-02-17

1978-10-10

Kazenske, Edward R.

Fluid-pressure and analogous brake systems

Multiple fluid-receiving devices

Multiple motors

1374939, 303 69, 303 77, 303 82, B60T 1520

Patent

active

041193512

ABSTRACT:
A vehicle air brake system includes spring set air released parking brakes to which air is supplied through a pressure holding valve which maintains the air chambers of the parking brakes at a predetermined pressure even though the air brake system may be at operating pressures substantially lower than the predetermined pressure. When the air pressure in the air brake system falls below operational levels, the pressure holding valve responds to release the air from the parking brake chambers.

REFERENCES:
patent: 2706487 (1955-04-01), Wilson
patent: 3285672 (1966-11-01), Avrea
patent: 3394968 (1968-07-01), Bueler
patent: 3439873 (1969-04-01), Relf
patent: 3862782 (1975-01-01), Horowitz et al.
patent: 4016904 (1977-04-01), Gordon

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