Fluid flow shutoff valve

Details Fluid flow shutoff valve Fluid flow shutoff valve

1979-01-29

1980-12-09

Cline, William R.

Fluid handling

Systems

With pump

137494, 123198DB, 417295, 60459, B60K 1508

Patent

active

042379261

ABSTRACT:
A fluid system (10) has a shutoff valve (13) positioned between a fluid tank (11) and the intake side of a pump (12). The valve (13) includes a valve spool (21) movable between a first position at which an inlet port (18) connected to the fluid tank (11) is blocked from communication with an outlet port (19) connected to an intake side of the pump (12) and a second position at which the inlet port (18) is in communication with the outlet port (19). A passage (26) connects the outlet port (19) to a first chamber (23) at one end of the valve spool (21) while a port (27) connects the discharge side of the pump (12) to a second chamber (24) at the opposite end of the valve spool (21). A spring (29) resiliently urges the valve spool (21) to the first position.

REFERENCES:
patent: 1142194 (1915-06-01), Morgan
patent: 2767726 (1956-10-01), Feucht
patent: 3977384 (1976-08-01), Jahn
patent: 3994357 (1976-11-01), Smitley

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