Device for connecting a pressure fluid source to a fluid motor

Details Device for connecting a pressure fluid source to a fluid motor Device for connecting a pressure fluid source to a fluid motor

1980-10-31

1982-07-27

Walton, George L.

Fluid handling

With leakage or drip collecting

91468, 137498, 13750525, F16K 1740, F16K 31122

Patent

active

043412351

ABSTRACT:
A device for connecting a hydraulic pump or other pressure fluid source to a working cylinder or other fluid motor comprises a pair of concentric hoses and a safety shut-off valve. One end of the inner hose is connected to the cylinder and the other end is connected to the pump by way of the safety shut-off valve. The space between the hoses normally is unpressurized and is in constant communication with a cavity containing a movable element of the shut-off valve. An elevated pressure in the space between the hoses will actuate the valve element for closing the shut-off valve. A second valve element is movable to close the valve when subjected to fluid flow forces resulting from an excessive flow of hydraulic liquid through the shut-off valve.

REFERENCES:
patent: 3344807 (1967-10-01), Lehrer et al.
patent: 3434493 (1969-03-01), Owens
patent: 3890999 (1975-06-01), Moskow
patent: 4004607 (1977-01-01), Freese
patent: 4174732 (1979-11-01), Freese
patent: 4257449 (1981-03-01), Takagi

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