Patent ID: 7841360
Filing Date: 2010-11-30
Classification: F15B,F16H,F16K,G05D,Y10T

Abstract:
1. A proportional pressure control valve, comprising: a housing with first, second and third ports extending independently therein from an outside surface of said housing and connectable to a hydraulic drive system with a definable consumer pressure; a valve piston movably mounted in said housing controlling connection of said second and third ports by varying positions thereof and exposed to and acted on by prevailing consumer pressure at said first port on a first end thereof; a pilot seat in said housing and dynamically connected to said valve piston by an energy storage device on a second end of said valve piston, said first and second ends being opposite, said valve piston and said pilot seat including a piston connecting channel and a seat connecting channel, respectively, extending therethrough and having a choke orifice on an end of each thereof facing said first port; and valve control triggering said valve piston and acting on said valve piston, said seat, connecting channel being closable by a conical closing part of said valve control; depending on the prevailing consumer pressure and an actuating force of said valve control said valve piston is set in a position allowing fluid flow between said second and third ports in both directions through said valve housing.