Motors: expansible chamber type – Fluid supply through diverse paths to single expansible chamber – Second path activated in response to pressure or flow in...
Patent
1986-05-23
1988-07-26
Garrett, Robert E.
Motors: expansible chamber type
Fluid supply through diverse paths to single expansible chamber
Second path activated in response to pressure or flow in...
91 31, 91 32, 91 33, 91 20, 254277, 254394, 254392, F15B 1304
Patent
active
047592567
ABSTRACT:
Apparatus for controlling fluid communication with a fluid pressure system includes parallel flow paths connected to the system. A first flow path includes first valve apparatus for selectively closing the flow path. The second flow path includes relief valve apparatus responsive to fluid pressure in the second flow path to move from a closed configuration to an open configuration. Switching apparatus, including sensors for detecting the condition of the system, operate to close the first valve apparatus in response to pre-determined threshold values of such condition. Fluid communication from the system may thereafter occur along the second flow path at the relief valve apparatus opens in response to pressure buildup in the flow path. A third flow path, parallel to the first two flow paths, may be provided with throttling apparatus for controlled communication of fluid along such third flow path.
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Kovit Sheldon L.
Nayler Douglas W. J.
Yam Bryan K.
Denion Thomas
Garrett Robert E.
NL Industries Inc.
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