Motors: expansible chamber type – With correlated control of motive fluid and locking means – Common or interconnected valve means control motive fluid...
Patent
1988-03-16
1989-05-02
Garrett, Robert E.
Motors: expansible chamber type
With correlated control of motive fluid and locking means
Common or interconnected valve means control motive fluid...
91 44, 92 23, 92 88, 188271, 188 67, F15B 1526
Patent
active
048257460
ABSTRACT:
Power cylinder comprising a housing having a throughbore capped by end plates defining therein a longitudinally extending chamber. A piston including a longitudinally extending body portion mounts for reciprocal movement in and in bearing relation to the portion of the wall surface which bounds the length of said chamber. The piston has a longitudinally extended through passage and brake means immediately of its outer peripheral surface. A valve device associated with the piston body includes a portion thereof in communication with the through passage. The housing has ports respectively communicating with respective end portions of the chamber for selective delivery thereto and discharge therefrom of fluid under pressure and the selective application of such fluid under pressure to one or both ends of the piston. The valve portion associated with the through passage is constructed and arranged (1) to respond to fluid under pressure applied to one end of the piston to provide a closing of its through passage and prevent movement of applied fluid therethrough as the piston is moved thereby to the remote end of the chamber and (2) to respond to simultaneous application of pressure fluid to both end portions of the piston to place the so applied pressure fluid in communication with said brake means to activate and substantially simultaneously lock portions thereof to that portion of the chamber wall surface which is then in peripherally bounding realtion thereto.
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Bloom Jerome P.
Denion Thomas
Garrett Robert E.
Mosier Industries, Incorporated
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