Sealed spring brake actuator

Details Sealed spring brake actuator Sealed spring brake actuator

1995-12-05

1997-09-30

Denion, Thomas E.

Expansible chamber devices

Relatively movable working members

First working member moves second coaxial working member...

92 82, 285179, F01B 700

Patent

active

056716540

ABSTRACT:
An improved brake actuator is fully sealed against ingress of liquid or other contaminants. Separate breather tubes selectively communicate each of the pressure ports to the non-pressurized sides of the service and spring chambers. The separate breather tubes provide clean air into the non-pressurized chambers. Relief valves are positioned in each of the breather tubes. The pressurized ports may be reconfigured into two configurations such that the source of pressurized air may be connected to either of two orientations. In addition, a seal closely receives the push rod such that the non-pressurized chamber of the service side is fully sealed against ingress of liquids.

REFERENCES:
patent: 1605507 (1926-11-01), Burke
patent: 3202530 (1965-08-01), Dobrikin et al.
patent: 3401606 (1968-09-01), Mathews et al.
patent: 3502003 (1970-03-01), Dobrikin et al.
patent: 3943831 (1976-03-01), Coupland
patent: 4221158 (1980-09-01), Klimek et al.
patent: 4478319 (1984-10-01), Casaline et al.
patent: 4890540 (1990-01-01), Mullins
patent: 4907496 (1990-03-01), Neal

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