Fluid handling – Systems – Supply and exhaust
Reexamination Certificate
2006-10-10
2006-10-10
Keasel, Eric (Department: 3753)
Fluid handling
Systems
Supply and exhaust
Reexamination Certificate
active
07117889
ABSTRACT:
The object of the present invention is to provide a three-way valve reduced in the number of component parts and man-hours for assembling the component parts. A pressure chamber of a piston for urging a first main valve in a valve-closing direction by a spring, and a pressure chamber of a piston for urging a second main valve in a valve-opening direction against the urging force of a spring are connected to a medium-pressure port B via a pilot valve and a pressure passage. When the pilot valve is open, the pressure in the pressure chambers into which high-pressure fluid is introduced from a high-pressure port A via an orifice is permitted to escape to the medium-pressure port B, whereby the piston is pushed upward by the high pressure to open the first main valve, and a plug is urged by the spring to close the second main valve. When the pilot valve is closed, the pressure in the pressure chambers becomes high, so that the piston is pushed downward by the spring to close the first main valve, and the piston is pushed downward by the high pressure to open the second main valve. Since the pilot valve is formed by a two-way solenoid valve, and the pressure passage is formed within a body, it is possible to reduce the number of component parts.
REFERENCES:
patent: 2878832 (1959-03-01), Hoge
patent: 3175581 (1965-03-01), Brandenberg et al.
patent: 3194266 (1965-07-01), Abbott et al.
patent: 3536096 (1970-10-01), Grieger et al.
patent: 5588463 (1996-12-01), Kervagoret
patent: 6637462 (2003-10-01), Foster et al.
patent: 652 181 (1985-10-01), None
patent: 1 917 499 (1970-10-01), None
patent: 789 241 (1958-01-01), None
patent: 5-64582 (1993-08-01), None
Keasel Eric
Schneider Craig
TGK Co. Ltd.
Westerman, Hattori, Daniels & Adrian , LLP.
LandOfFree
Three-way valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Three-way valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three-way valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3664929