Motors: expansible chamber type – With motive fluid valve – Pilot valve
Patent
1988-09-19
1990-07-03
Michalsky, Gerald A.
Motors: expansible chamber type
With motive fluid valve
Pilot valve
91446, 91448, 91459, 187111, F15B 13043
Patent
active
049381199
ABSTRACT:
The invention concerns a valve structure comprising a valve body, a chamber space disposed within the valve body, two running spindles and seats disposed to cooperate and placed within the chamber space, each running spindle enabling the aperture in the respective seat to be controlled. The valve structure comprises an input duct, a return duct and a working duct, the ducts being connected to the chamber space, a pressurized fluid being supplied through the input duct in the chamber space and the fluid being conducted through the controllable apertures with the aid of the running spindles either through the return duct out from the valve means to a tank or equivalent, or through the working duct to at least one power cylinder or equivalent, and the position of the running spindles and the size of the apertures being controlled with the aid of pilot valves. Through each running spindle is provided a passage connecting the back chamber space behind the running spindle with the space in front of the running spindle. In each passage is disposed pilot valves which control the differential pressure across the running spindles. At the same time the position of the running spindles and the size of the apertures are controlled, as well as the fluid flows from the chamber space to the return duct and/or to the working duct.
REFERENCES:
patent: 3057160 (1962-10-01), Russell et al.
patent: 4011888 (1977-03-01), Whelchel et al.
patent: 4153074 (1979-05-01), Risk
patent: 4318332 (1982-03-01), Shingu et al.
patent: 4418794 (1983-12-01), Manco
patent: 4583567 (1986-04-01), Arav
patent: 4700748 (1987-10-01), Fossati et al.
LandOfFree
Valve means does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Valve means, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Valve means will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1883384