Pump with reciprocating high pressure seal and valve for...

Details Pump with reciprocating high pressure seal and valve for... Pump with reciprocating high pressure seal and valve for...

2006-09-12

2006-09-12

Kramer, Devon (Department: 3683)

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

C303S010000

Reexamination Certificate

active

07104613

ABSTRACT:
A pump assembly with a combination reciprocating high-pressure seal and fluid inlet check valve for use within brake systems. The pump assembly comprises a housing having a bore formed therethrough and a piston disposed within the bore for reciprocal movement therein. An annular seal is disposed around the piston for reciprocal movement thereon. The annular seal cooperates with the piston and/or the housing to form at least one longitudinally extending passageway. The passageway, the piston, the annular seal, and the housing cooperating to form a check valve assembly. The annular seal is moveable to a first position relative to the piston in which the check valve assembly is in a flow-through position to fill a pump chamber with fluid from an inlet chamber during a fluid inlet stroke. The annular seal is moveable to a second position relative to the piston in which the check valve assembly is closed.

REFERENCES:
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patent: 4556261 (1985-12-01), Farr
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patent: 5207567 (1993-05-01), Joy
patent: 5336066 (1994-08-01), Myers et al.
patent: 6671966 (2004-01-01), Lewis
patent: 2005/0074349 (2005-04-01), Hool et al.
patent: 308 083 (1955-06-01), None
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patent: 60198382 (1985-10-01), None
patent: PCT/US2004/032607 (2004-10-01), None
patent: WO 2005/032897 (2005-04-01), None
U.S. Appl. No. 10/678,676, filed Oct. 3, 2003, Hool et al.

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