Hydraulic disc brake actuator

Details Hydraulic disc brake actuator Hydraulic disc brake actuator

1974-06-17

1977-04-19

Halvosa, George E. A.

Expansible chamber devices

Rectilinearly moving working member and coaxial or parallel...

92 63, 92130A, 92130B, 188170, 192 91R, F01B 300

Patent

active

040181405

ABSTRACT:
A hydraulic disc brake actuator is disclosed. The actuator uses a first hydraulic motor for actuating a service brake, and a spring-applied, hydraulically released motor for emergency or handbrake applications. If the braking system malfunctions or is disengaged from its source of hydraulic pressure, the spring motor may be used to apply the brake by merely venting its associated hydraulic motor. The spring brake may be released by energizing a second hydraulic motor, or by using a mechanical restraction device to compress the spring motor. The spring-applied brake may be used as a parking brake or as an emergency brake.

REFERENCES:
patent: 2904961 (1959-09-01), Herbert
patent: 3181433 (1965-05-01), Cruse
patent: 3295423 (1967-01-01), Cox, Jr. et al.
patent: 3508470 (1970-04-01), Swander, Jr. et al.
patent: 3599761 (1971-08-01), Schultz et al.
patent: 3661230 (1972-05-01), Burnett
patent: 3768601 (1973-10-01), Bejot
patent: 3782251 (1974-01-01), Marchand
patent: 3833095 (1974-09-01), Engle
patent: 3895695 (1975-07-01), Hunter

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