Spring brake actuator with internal breathing conduit

Details Spring brake actuator with internal breathing conduit Spring brake actuator with internal breathing conduit

1997-11-06

1999-08-17

Ryznic, John E.

Expansible chamber devices

Relatively movable working members

First working member moves second coaxial working member...

92110, 92 48, F01B 700, F01B 3100

Patent

active

059377330

ABSTRACT:
A spring brake actuator (10), with a large-force compression spring (82) in a second spring chamber (78) of the housing, has vent openings (100) in the housing communicating with the second spring chamber (78). A filter assembly (134) covers the vent openings (100). Weep holes (62), (104), (102), and (100) in a sleeve (50) of an push rod (18), in a spring brake actuator rod (84), and in a spring brake housing portion (68) together permit fluid compressed in a first service brake chamber (30) to flow through a conduit define by these weep holes out of the brake actuator (10) wherein it is filtered by the filter assembly (134).

REFERENCES:
patent: H748 (1990-03-01), Graham
patent: 3406609 (1968-10-01), Cox
patent: 3896706 (1975-07-01), Newstead et al.
patent: 4796513 (1989-01-01), Hata et al.
patent: 4889037 (1989-12-01), Goral et al.
patent: 4890540 (1990-01-01), Mullins
patent: 5263403 (1993-11-01), Choinski et al.
patent: 5311809 (1994-05-01), Choinski et al.
patent: 5640893 (1997-06-01), Stojic
patent: 5671654 (1997-09-01), Plantan

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