Hydropneumatic brake actuator arranged to maintain a constant br

Details Hydropneumatic brake actuator arranged to maintain a constant br Hydropneumatic brake actuator arranged to maintain a constant br

1988-02-03

1989-02-07

Butler, Douglas C.

Brakes

Position adjusters

Slack

188 718, 188153R, 188196P, 188198, 188347, 188 7951, 188351, 92 131, F16D 6572

Patent

active

048025593

ABSTRACT:
A hydraulic power unit for a hydropneumatic brake actuator having a power piston comprising a force piston formed with a bore therein and a take-up piston operative in the force piston bore for movement relative thereto during a brake application. This relative movement is controlled by a check valve device carried with the force piston to establish or interrupt fluid pressure communication between the respective pistons and establishes a positive clearance between a brake shoe and wheel tread, for example, during a subsequent brake release.

REFERENCES:
patent: 2952338 (1960-09-01), Ostwalt
patent: 3125187 (1964-03-01), Dotto
patent: 3421604 (1969-01-01), Hobbs
patent: 3517784 (1970-06-01), Clemmons
patent: 3828894 (1974-08-01), Crossman
patent: 3837443 (1974-09-01), Clemmons et al.
patent: 4319671 (1982-03-01), Smith et al.
patent: 4323144 (1982-04-01), Morris et al.
patent: 4428462 (1984-01-01), Warwick et al.
patent: 4494631 (1985-01-01), Billeter
patent: 4496033 (1985-01-01), Hall et al.

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