Patent ID: 8746276

Claim:
A proportional throttle valve, comprising a valve housing having a fluid inlet and a fluid outlet; a valve piston movably guided in a longitudinal direction in said valve housing; a compression spring pretensioning said valve piston against a stroke stop defining a closed position; a pressure limiting valve integrated in said valve housing and in said valve piston and exposed to fluid pressure on a back side of said valve piston to move away from said stroke stop in opposition to pretensioning of said compression spring when a definable pressure is exceeded at said fluid inlet, fluid pressure at said fluid inlet acting on a valve seat of said pressure limiting valve and being routed via a radially offset axial bore in said valve piston to said back side of said valve piston via an orifice, a piston bore extending axially in said valve piston and a radial bore in said valve piston to a pilot chamber for pressure balancing of said valve piston; and an actuating magnet directly coupled to said valve piston.