Coaxial bidirectional spool valve

Details Coaxial bidirectional spool valve Coaxial bidirectional spool valve

1981-07-20

1984-04-03

Garrett, Robert E.

Power plants

Pressure fluid source and motor

With means purging, cleaning or separating undesirables from...

92 78, 1374939, 137549, 210130, B01D 2710, F16K 1726

Patent

active

044399847

ABSTRACT:
Coaxial bidirectional spool valves are provided for use in fluid systems such as hydrostat systems where flow can proceed in opposite directions, and which direct flow through a unidirectional or multidirectional function such as a filter assembly in the normal direction regardless of the direction of flow in the system. The valve includes a spool valve reciprocably movable between two limiting positions according to fluid pressure differential across the valve and engaging one of a pair of bungee followers in each position, thereby intercepting and controlling flow through a box junction of the fluid line with the lines leading to and from the filter assembly in a manner such that, regardless of the direction of flow in the fluid line, flow proceeds in the same direction in the connecting fluid lines to and from the function.

REFERENCES:
patent: 2934080 (1960-04-01), Rice
patent: 4003397 (1977-01-01), Cooper
patent: 4009572 (1977-03-01), Cooper

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