Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors
Patent
1978-12-01
1980-10-14
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Multiple fluid-receiving devices
Multiple motors
137 87, 303 6C, 303 22R, B60T 826, B60T 1110
Patent
active
042277469
ABSTRACT:
The braking pressure control unit for a dual circuit brake system comprises a housing with two closure members arranged therein coaxially and in tandem. In their rest position, the closure members are held spaced apart from associated valve seats by a control force. The control force acts directly on a first of the two closure members which in turn bears against a second of the two closure members provided both are in the open positions. At least one closure member consists of a shaft element having one end in an operative relationship with the adjacent end of the other closure member and a closure element in a slidably sealed relationship with the outer surface of the shaft element, the closure element being displaced between limits of the shaft element. A weak closure spring biases the closure element toward its associated valve seat.
REFERENCES:
patent: 3973578 (1976-10-01), Heibel et al.
patent: 3992063 (1976-11-01), Falk
patent: 4025123 (1977-05-01), Oberthuer
patent: 4053185 (1977-10-01), Carre
patent: 4053186 (1977-10-01), Jakobi
Schopper Bernd
Tandler Peter
Butler Douglas C.
Hill Alfred C.
IT&T Industries, Inc.
O'Halloran John T.
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