Metering valve with integral relief and makeup function

Details Metering valve with integral relief and makeup function Metering valve with integral relief and makeup function

2007-08-21

2007-08-21

Leslie, Michael (Department: 3745)

Motors: expansible chamber type

With motive fluid valve

Relatively movable inlet and exhaust valves for single...

C251S030020

Reexamination Certificate

active

11214957

ABSTRACT:
A metering valve for a work machine hydraulic system is disclosed. The metering valve has an inlet and an outlet, a main poppet, and a solenoid-operated pilot element. The main poppet is movable to pass fluid from the inlet to the outlet, and to block fluid from the inlet to the outlet. The solenoid-operated pilot element is movable between a first position at which pressurized fluid from the inlet pressurizes a control chamber in communication with a control end of the main poppet to urge the main poppet toward the flow-blocking position, and a second position at which the control chamber is communicated with a drain to move the main poppet toward the flow-passing position. The metering valve also has a relief valve element configured to drain pressurized fluid from the control chamber to move the main poppet toward the flow-passing position in response to a pressure at the inlet exceeding a predetermined pressure.

REFERENCES:
patent: 5137254 (1992-08-01), Aardema et al.
patent: 5421545 (1995-06-01), Schexnayder
patent: 5645263 (1997-07-01), Aardema
patent: 5709368 (1998-01-01), Hajek, Jr.
patent: 5868059 (1999-02-01), Smith
patent: 6047944 (2000-04-01), Hajek, Jr.
patent: 6089528 (2000-07-01), Hajek, Jr. et al.
patent: 6502393 (2003-01-01), Stephenson et al.
patent: 6694859 (2004-02-01), Smith
patent: 6748738 (2004-06-01), Smith
patent: 6769252 (2004-08-01), Smith
patent: 6848475 (2005-02-01), Smith

Affiliated with

Also associated with

Rating

Metering valve with integral relief and makeup function does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Metering valve with integral relief and makeup function, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metering valve with integral relief and makeup function will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3828815