Fluid handling – Systems – Multi-way valve unit
Patent
1979-02-22
1981-11-03
Michalsky, Gerald A.
Fluid handling
Systems
Multi-way valve unit
137DIG7, F15B 13044
Patent
active
042980275
ABSTRACT:
A three-way, normally closed only, pilot valve for supplying pressurized pilot air to a fluid flow control valve, such as a four-way valve, a three-way valve, a two-way valve, or the like, for shifting the main spool valve of such valves. The pilot valve includes a valve body with a pressurized pilot air inlet port, a cylinder port, and an exhaust port. The inlet port is connected by a first passageway to the cylinder port. The cylinder port is connected by a second passageway to the exhaust port. A poppet spool valve is movably mounted in the valve body between an inoperative position for blocking the first passageway means, and an operative position for opening the first passageway means and blocking the second passageway means. A spring and air assist return means moves the poppet spool valve to the inoperative position. A solenoid moves the poppet spool valve to the operative position. The poppet spool valve has only one dynamic seal. The pilot valve includes a pair of longitudinally spaced apart, sharp edged valve seats which are alternately engaged, by a pair of longitudinally spaced annular valve members on the poppet spool valve, when the poppet spool valve is moved between the operative and inoperative positions.
REFERENCES:
patent: 3080888 (1963-03-01), Brinkel
patent: 3202182 (1965-08-01), Haviland
patent: 3329165 (1967-07-01), Lang
patent: 3538954 (1970-11-01), Fagerlie et al.
patent: 4187884 (1980-02-01), Loveless
Mac Valves Inc.
Mentag Robert G.
Michalsky Gerald A.
LandOfFree
Three-way normally closed pilot 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 normally closed pilot valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three-way normally closed pilot valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1059938