Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1994-06-02
1995-04-25
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303 7, 303 28, 303 40, 303 71, 303 976, 303 68, 3031191, 188170, B60T 832, B60T 1300
Patent
active
054093031
ABSTRACT:
A full function skid control valve assembly for use in an air brake system which provides for brake control utilizing a compact single assembly. The system provides for the maintenance of certain minimum operating pressures so that, when the air pressure within the vehicle brake system falls below predetermined levels, the valve assembly automatically partially or entirely exhausts the air pressure sometimes causing the spring parking brakes to engage. Once the air pressure within the brake system returns to predetermined levels, the valve assembly will allow a reservoir to be charged and the spring brakes to be deactuated. During operation, the assembly provides control of the service brakes while preventing undesired skid conditions.
REFERENCES:
patent: 3836209 (1974-09-01), Neisch
patent: 3857614 (1974-12-01), Kurichl
patent: 3929381 (1985-12-01), Durling
patent: 5236250 (1993-08-01), Moody et al.
Engelbert David G.
Taylor Robert S.
Wallestad Steven D.
Butler Douglas C.
Midland Brake, Inc.
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