Series self-leveling valve

Details Series self-leveling valve Series self-leveling valve

1981-03-17

1983-10-11

Schwadron, Martin P.

Motors: expansible chamber type

Fluid supply through diverse paths to single expansible chamber

One path includes restriction

91 6, 91513, 91516, 91520, 414700, 414708, F15B 1306

Patent

active

044085184

ABSTRACT:
A self-leveling series type hydraulic system 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 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 connected to one of the boom valve motor ports 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.

REFERENCES:
patent: 3179120 (1965-04-01), Erickson
patent: 3251277 (1966-05-01), Stacey
patent: 3563137 (1971-02-01), Graber
patent: 3811587 (1974-05-01), Seaberg
patent: 3987920 (1976-10-01), Parquet

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