Motors: expansible chamber type – With motive fluid valve – Inlet check valve with means for disconnectable supply line
Patent
1992-08-27
1994-01-04
Look, Edward K.
Motors: expansible chamber type
With motive fluid valve
Inlet check valve with means for disconnectable supply line
91437, 91440, 137328, 137539, 251360, 811775, 81461, F15B 1108, F15B 1304
Patent
active
052750868
ABSTRACT:
A fluid actuator of the type for producing reciprocal movement is provided having a cylindrical housing adapted to be secured to a relatively stationary object. The cylindrical housing includes first and second end portions and respective first and second fluid ports positioned therein. A piston is disposed for relative movement within the cylindrical housing and defines first and second fluid chambers within the housing. The first fluid chamber is in communication with the first fluid port and the second fluid chamber is in communication with the second fluid port. A piston rod connects to the piston and extends outwardly from the first end portion of the housing. The piston rod is adapted to be connected to an object to be moved. A conduit communicates with the first fluid chamber through the first fluid port in the first end portion of the housing and extends longitudinally from the first fluid port alongside the housing to the second end portion of the housing. Valve arrangement is disposed within the second end portion of the housing and in fluid communication with the second fluid chamber directly through the second fluid port and in fluid communication with the first fluid port through the conduit for controlling the fluid pressure within the chambers responsive to pressure in one of the chambers exceeding a predetermined pressure therein and to moderate movement of the piston responsive thereto. The valve arrangement includes an adjustable valve seat within the second end portion of the housing, a ball member positioned on the valve seat, and a spring cooperating with the ball member for maintaining the ball member in cooperating relation with the valve sat. Pressure selective apparatus cooperates with the adjustable valve seat for selectively adjusting the position of the valve seat which in turn adjusts the compression force of the spring on the ball member and to thereby adjust the predetermined pressure.
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Look Edward K.
Nguyen Hoang
Unlimited Solutions, Inc.
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