Brakes – Wheel – Axially movable brake element or housing therefor
Patent
1997-08-01
2000-01-25
Schwartz, Chris
Brakes
Wheel
Axially movable brake element or housing therefor
188 724, 188 731, F16D 5502, F16D 5518, F16D 6500
Patent
active
060168927
ABSTRACT:
An adjustment arrangement or adjuster for a hydraulic brake actuator (5) of the type having a piston (13) which moves a preferred distance within a cylindrical bore (18) in a housing (7) between a quiescent retracted position with a preferred clearance space (25) between one piston end (10) and a brake member (2) of a heat stack (1), and an extended position with the one piston end (10) engaging and actuating the brake member (2) in response to the application of hydraulic fluid pressure, includes a return spring (19) which, upon relief of the hydraulic pressure, urges the piston (13) back from the brake member (1) engaging position to the retracted position. An internally disposed mechanical piston clearance space adjuster includes inner (15) and outer (17) concentric sleeves, the inner one of which establishes a normally fixed anchor location (39) comprising a rim and/or washer (39a) engaging and holding one end of the return spring (19) during spring compression, and an arrangement for moving the anchor location to a new fixed location in response to piston translation exceeding the preferred clearance space (25) thereby changing the quiescent position to which the return spring (19) forces the piston (13) and reestablishing the preferred clearance space (25).
REFERENCES:
patent: 3729072 (1973-04-01), Borkowski
patent: 4529068 (1985-07-01), Gallo
patent: 4751985 (1988-06-01), Chambers
patent: 5219046 (1993-06-01), Clark
patent: 5355774 (1994-10-01), Dittlinger
patent: 5542504 (1996-08-01), Berwanger
Allied-Signal Inc.
Palguta Larry J.
Schwartz Chris
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