Fluid-pressure regulating valve

Details Fluid-pressure regulating valve Fluid-pressure regulating valve

1974-12-06

1976-03-23

Reger, Duane A.

Fluid-pressure and analogous brake systems

Load control

Responsive to fluid pressure spring

303 40, B60T 822

Patent

active

039456900

ABSTRACT:
A fluid-pressure regulating valve for adjusting a supply pressure from either of two air reservoirs according to the payload of a vehicle and supplying the adjusted pressure to a control pressure chamber in a pressure-proportioning relay valve, the regulating valve comprising: a valve assembly for controlling the supply pressure, said assembly including a pressure piston reciprocably disposed in the valve body and formed with an air passage through the wall on one side, a supply valve accommodated in a supply pressure chamber inside the pressure piston and seated on a valve seat provided at the lower end of the supply pressure chamber, and an exhaust valve having an exhaust valve seat engageable with the supply valve and also having an upward protrusion extended through an exhaust bore formed in the axial center of the supply valve; an output pressure chamber defined between the underside of the pressure piston and the inner wall of the valve body; a balance spring disposed above the pressure piston in communication with the atmosphere to offset the upward force developed by the output pressure to raise the pressure piston; and a loading spring disposed under the exhaust valve to bias the supply valve into the open position via the exhaust valve; said upward protrusion of the exhaust valve being linked at its end with a linkwork movable in response to the vehicle payload.

REFERENCES:
patent: 3484138 (1969-12-01), Cumming
patent: 3767274 (1973-10-01), Gruner et al.

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