Pressure loss compensation device of a fluid pressure circuit an

Details Pressure loss compensation device of a fluid pressure circuit an Pressure loss compensation device of a fluid pressure circuit an

1997-11-06

1999-08-31

Nguyen, Hoang

Power plants

Pressure fluid source and motor

60459, F16D 3102

Patent

active

059438606

ABSTRACT:
A pressure loss compensation device for a fluid pressure circuit automatically compensates a pressure loss of a working fluid pressure as required or regularly, in the fluid pressure circuit. A cylinder device forming the pressure loss compensation device is provided in the intermediate position of piping of the fluid pressure circuit. The cylinder device has an actuation pressure introducing chamber introducing a pneumatic pressure and a fluid pressure generating chamber communicated with the piping via a branch pipe provided with a check valve. A return spring is provided in a piston and a fluid induction pipe communicated with an oil pan is connected to the fluid pressure generating chamber. An excessive pressure introducing port is communicated with a drain port when the piston is shifted toward the fluid pressure generating chamber. The excessive pressure introducing port is connected to the piping via a relief valve. A gap serving as an orifice is provided between the excessive pressure introducing port and the drain port, which gap is adapted to be closed by the piston at the lowered position.

REFERENCES:
patent: 4099379 (1978-07-01), Budzich
patent: 4800990 (1989-01-01), Blain
patent: 5314315 (1994-05-01), Tcholakov
patent: 5579676 (1996-12-01), Wilke
patent: 5609088 (1997-03-01), Park

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