Motors: expansible chamber type – Relatively movable working members with one having motive... – Single valve unit controlling plural working chambers
Patent
1997-02-05
1999-11-02
Lopez, F. Daniel
Motors: expansible chamber type
Relatively movable working members with one having motive...
Single valve unit controlling plural working chambers
92140, 92240, 74129, F01L 3302
Patent
active
059749431
ABSTRACT:
A fluid valve system is provided for a variable stroke motor. The valve has a housing forming a cylinder, a first fluid input into the cylinder, a first fluid output out of the cylinder, a second fluid input into the cylinder, and a second fluid output out of the cylinder. Provided within the cylinder is a shaft provided with slots. As the shaft rotates into a first position, fluid communication between the first fluid input and the first fluid output is shut off, while fluid communication between the second fluid input and second fluid output is opened. As the shaft rotates to a second position, communication between the first fluid input and first fluid output is opened, while the communication between the second fluid input and the second fluid output is shut off. The device is preferably hooked up to a drive cylinder in fluid communication with the first fluid output and the second fluid input. A piston is provided within the drive cylinder. A fluid supply is operably coupled to the first fluid input and means are provided for rotating the shaft at a constant speed. As pressure of the fluid increases, the stroke of the piston increases, thereby generating a longer piston stroke, while the speed of the rotating shaft remains constant.
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patent: 5484272 (1996-01-01), Horn
patent: 5485905 (1996-01-01), Rader, III
Lopez F. Daniel
Trout Brett J.
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