EP 0047885 B1 19840208 - FLOW CONTROL VALVE ARRANGEMENT
Title (en)
FLOW CONTROL VALVE ARRANGEMENT
Publication
Application
Priority
DE 3034377 A 19800912
Abstract (en)
[origin: US4365645A] A three-way or three-ported flow-regulating valve for use in a hydraulic system comprises a two-position two-ported throttle valve inserted between an inflow conduit and an outflow conduit and a pressure-relief valve connected to the inflow conduit at an upstream point thereof and at a downstream point proximate to an intake port of the throttle valve. A servovalve is connected in parallel to the throttle valve via small-diameter pressure-transmission channels extending to the intake port and to an output port of the throttle valve. Upon a jump in the pressurization of the inflow conduit, for example due to the activation of an auxiliary pump, the pressure-relief valve opens; it closes again only upon an equalization of the pressure throughout the inflow conduit. The servovalve has a biasing spring which exerts a force determining the maximum pressure drop across the throttle valve.
IPC 1-7
IPC 8 full level
F16K 17/30 (2006.01); F04B 49/08 (2006.01); F15B 11/05 (2006.01)
CPC (source: EP US)
F04B 49/08 (2013.01 - EP US); Y10T 137/2589 (2015.04 - EP US); Y10T 137/2594 (2015.04 - EP US)
Designated contracting state (EPC)
AT BE CH FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0047885 A1 19820324; EP 0047885 B1 19840208; AT E6168 T1 19840215; DE 3034377 A1 19820422; DE 3034377 C2 19890302; JP H0423122 B2 19920421; JP S5779369 A 19820518; US 4365645 A 19821228
DOCDB simple family (application)
EP 81106571 A 19810825; AT 81106571 T 19810825; DE 3034377 A 19800912; JP 14372281 A 19810911; US 29399081 A 19810818