Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors
Patent
1981-11-03
1983-11-22
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Multiple fluid-receiving devices
Multiple motors
188349, B60T 826, B60T 1134
Patent
active
044164904
ABSTRACT:
In a pressure control valve for a hydraulic brake system for vehicles, the closure member is carried by a control piston which has one of its ends guided through an annular seal and in a housing bore, which is preferably connected to atmosphere, and carries adjacent its other end a support plate for engagement with a valve spring. The valve seat is part of an annular body encircling the control piston and held in place by a tubular body surrounding the annular body and the control piston and secured to the housing. A return channel is formed between the annular body and the tubular body and incorporates therein a check valve opening in the direction from the outlet chamber to the inlet chamber. The annular seal is in abutment with a step in the housing and the annular body is in abutment with an inner flange of the tubular body. To obtain a minimum possible overall axial length, the annular body and the annular seal are arranged adjacent each other, leaving a clearance for radial channels. An elastic profile ring serves both as a valve seat and as a closure member of the check valve. The profile ring may be formed separate from or integral with the annular seal.
REFERENCES:
patent: 3423936 (1969-01-01), Stelzer
patent: 3508792 (1970-04-01), Bueler
Butler Douglas C.
Chaban Marvin M.
IT&T Industries, Inc.
Raden James B.
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