Motors: expansible chamber type – With motive fluid valve – For double-acting motor
Reexamination Certificate
2007-12-11
2007-12-11
Lazo, Thomas E. (Department: 3745)
Motors: expansible chamber type
With motive fluid valve
For double-acting motor
C091S463000, C091S464000
Reexamination Certificate
active
10767547
ABSTRACT:
An actuator includes a piston within a cylinder, the cylinder having a first fluid port in communication with an open side of the piston, and a second fluid port in communication with a shaft side of the piston. The piston travels in a first direction, toward the shaft side of the piston and in a second direction, toward the open side of the piston. The actuator includes a valve circuit configured to selectively couple the first fluid port with a high-pressure fluid source when piston travel in the first direction is desired, and with a low-pressure fluid source when piston travel in the second direction is desired. The valve circuit is further configured to couple the second fluid port to the high-pressure fluid source when piston travel is desired in the first or second direction, and to close the first and second fluid ports when no piston travel is desired.
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Lazo Thomas E.
Seed IP Law Group PLLC
The United States of America, as represented by the Administrato
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