Leak-detecting hydraulic system

Details Leak-detecting hydraulic system Leak-detecting hydraulic system

1983-11-21

1985-06-11

Maslousky, Paul E.

Motors: expansible chamber type

With motive fluid valve

Contracting chamber exhaust valve controlled by expanding...

91437, 91447, 91452, F15B 1108, F15B 1304

Patent

active

045221090

ABSTRACT:
A leak-detecting hydraulic system is disclosed for operation of a fluid actuator associated with a front-end loader, a backhoe, or a like implement on a material handling device. Notably, the system includes a leak-detection circuit which normally acts to prevent movement of the implement associated with the actuator by gravity in the event of a failure in one of the hydraulic fluid lines operatively connected with the actuator. Additionally, the system preferably includes a selectively operable float valve which permits fluid flow which bypasses the leak-detection circuit, thus desirably permitting operation of the implement associated with the actuator in a "floating" mode.

REFERENCES:
patent: 4063489 (1977-12-01), Parquet et al.
patent: 4147093 (1979-04-01), Dunn
patent: 4282797 (1981-08-01), Hirsch
patent: 4367673 (1983-01-01), Krueck et al.

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