Patent ID: 6805148
Filing Date: 2004-10-19
Classification: F03C,Y10T

Abstract:
Pressure limiting valve to limit the pressure of hydraulic oil which can be admitted through two intakes comprising a control rod (3, 4), which is movable against spring force within a cylindrical housing (1) provided with the two intakes (A,B), which, when upon exposure of one of the intakes (A,B) with oil under high pressure, connects the other intake, which is supplied with oil under low pressure to an outlet leading to a pressure-limiting valve, characterized in that,the control rod (3, 4) is provided with an axial hole, in which a second control rod (5) is movable against the force of at least one limiting spring (6) adjusted to the pressure to be limited, and that the first control rod (3,4), depending upon which of the two intakes (A,B) is exposed to high pressure, is pushed into a position in which the second control rod (5) connects to the intake (A,B) under low pressure to an outlet opening (T), while overcoming the force of the limiting spring (6).