Series self-leveling valve

Details Series self-leveling valve Series self-leveling valve

1983-07-25

1985-12-31

Garrett, Robert E.

Motors: expansible chamber type

Fluid supply through diverse paths to single expansible chamber

One path includes restriction

91514, 91517, 91520, 91530, F15B 1306

Patent

active

045613427

ABSTRACT:
A self-leveling series type hydraulic system with a float position including boom and bucket valves which separately control boom and bucket cylinders and a flow divider valve positioned in the exhaust flow path from the rod end of the boom cylinder. The flow divider valve in one position splits the flow sending a portion of it to the cap end of the bucket cylinder so as to maintain the bucket in a level condition during raising of the boom with the remaining flow returning to the control valve downstream of the boom valve whereby the bucket valve can be separately actuated concurrent with the boom valve and supplied with oil so as to override the self-leveling function if desired. The flow divider valve having a second position which bypasses all of the flow from the boom cylinder to reservoir when the boom control valve is in a float position.

REFERENCES:
patent: 2737196 (1956-03-01), Eames
patent: 3033168 (1962-05-01), Ruhl
patent: 3482600 (1969-12-01), Hodgson
patent: 3703186 (1972-11-01), Brewer
patent: 4337787 (1982-07-01), Rhodes
patent: 4408518 (1983-10-01), Diel et al.

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