Patent ID: 9733651
Date: 2017-08-15
CPC Classifications: G05D

Claim:
1. A proportional pressure-regulating valve, comprising: a valve housing having a working connection, a tank connection and a supply connection; a regulating piston guided displaceably in said valve housing opening a first fluid connection from said working connection to said tank connection and closing a second fluid connection from said supply connection to said working connection when said regulating piston is in a first position, said regulating piston closing said first fluid connection and opening said second fluid connection in a second position of said regulating piston, said regulating piston being displaceable from the first position to a third position by a total differential pressure produced when fluid flows through said valve housing, said first fluid connection being opened with an enlarged cross section in the third position than in the first position while said second fluid connection remains closed; a restoring device holding said regulating piston in a direction of the first position; an actuating device displacing said regulating piston against a restoring force of said restoring device in a direction of the second position; and an intermediate element engaging and connecting the restoring device with said regulating piston, said intermediate element abutting said regulating piston in the first position of the regulating piston and being spaced apart from said regulating piston in the third position of said regulating piston.