Pressure-modifying valve and electric bypass

Details Pressure-modifying valve and electric bypass Pressure-modifying valve and electric bypass

1997-07-08

1998-08-25

Graham, Matthew C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

13759617, 3031152, B60T 826

Patent

active

057976627

ABSTRACT:
A hydraulic valve having a housing with a piston located in a bore. The piston has a passage which connects an inlet chamber with an outlet chamber. A piston responds to a pressure differential between the inlet chamber and outlet chamber pressure and an outlet pressure by moving in the bore. A valve carried by the piston engages a needle to open communication through the passage and communicate fluid from the inlet chamber toward the outlet chamber. The needle extends from a core of an electromagnet, which responds to move the valve off a seat and open communication through the passage in opposition to a spring which urges the valve toward the seat and correspondingly control communication through the passage.

REFERENCES:
patent: 3893693 (1975-07-01), Skoyles
patent: 4138165 (1979-02-01), Blomberg et al.
patent: 5042885 (1991-08-01), Villec
patent: 5203617 (1993-04-01), Wilde
patent: 5244261 (1993-09-01), Ohe
patent: 5299859 (1994-04-01), Tackett et al.
patent: 5333945 (1994-08-01), Volz et al.

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