Device for sequentially supplying several hydraulic motors

Details Device for sequentially supplying several hydraulic motors Device for sequentially supplying several hydraulic motors

1978-05-11

1979-12-25

Hershkovitz, Abraham

Motors: expansible chamber type

Fluid supply through diverse paths to single expansible chamber

Activation of one path disables second path

91447, 91517, 91518, 91510, 91531, F15B 1304

Patent

active

041799810

ABSTRACT:
A fluid supply circuit for supplying three motors includes means for sequentially connecting two of the motors to the supply conduit of the third motor as the pressure in the supply conduit rises through first and second threshold levels. The circuit includes a manual override for suppressing the automatic sequential action. The circuit is applied to the control of the booms and bucket of a hydraulic excavator, and provides for semi-automatic digging.

REFERENCES:
patent: 2979908 (1961-04-01), Shook
patent: 3354789 (1967-11-01), Schenkelberger
patent: 3543516 (1970-12-01), Treichel
patent: 3720059 (1973-03-01), Schurawski
patent: 3760689 (1973-09-01), Johnston

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