Force limiting device for a parking brake actuator arranged in s

Details Force limiting device for a parking brake actuator arranged in s Force limiting device for a parking brake actuator arranged in s

1976-11-30

1977-07-19

Halvosa, George E. A.

Fluid-pressure and analogous brake systems

Multiple fluid-receiving devices

Multiple motors

188106P, 303 68, B60T 1502, F16D 6514

Patent

active

040365336

ABSTRACT:
A force limiting device for a parking brake actuator is arranged in series with a service brake actuator to limit the maximum force of the two actuators to the maximum force from one of them. One actuator works from hydraulic pressure and the other from air pressure. Thus, an overflow valve controls the hydraulic pressure and is forced closed by an adjustable spring and open by either hydraulic pressure in a valve chamber or by air pressure exerted on a valve plunger. Both sides of the valve are maintained at the hydraulic pressure while the valve outlet is both closed or open.

REFERENCES:
patent: 2726738 (1955-12-01), Fawick
patent: 3443839 (1969-05-01), Hinrichs et al.
patent: 3456988 (1969-07-01), Gibbons et al.

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