Series self-leveling valve with single spool for unloading and r

Details Series self-leveling valve with single spool for unloading and r Series self-leveling valve with single spool for unloading and r

1985-10-02

1987-12-01

Garrett, Robert E.

Motors: expansible chamber type

Fluid supply through diverse paths to single expansible chamber

One path includes restriction

91513, 91516, 91520, 414708, F15B 1122, F15B 1307, B66F 346

Patent

active

047096187

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 of 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. An improved boom lower circuit which bypasses the flow divider valve as the boom is lowered to achieve a faster boom lower rate and the inclusion of an unloading valve in the bucket circuit which includes the dual function of preventing cavitation and relieving high pressure.

REFERENCES:
patent: 2306379 (1942-12-01), Conradson
patent: 2988891 (1961-06-01), Hemings
patent: 3023584 (1962-03-01), Markovich
patent: 3073123 (1963-01-01), Hodgson et al.
patent: 3161111 (1964-12-01), Williams
patent: 3179120 (1965-04-01), Erickson et al.
patent: 3217726 (1965-11-01), Rohweder et al.
patent: 3251277 (1966-05-01), Stacey
patent: 3563137 (1971-02-01), Graber et al.
patent: 3654835 (1972-04-01), Sievenpiper
patent: 3883023 (1975-05-01), Bernhoft
patent: 3987920 (1976-10-01), Parquet et al.
patent: 4058139 (1977-11-01), Budzich
patent: 4349305 (1982-09-01), Wynn et al.
patent: 4352398 (1982-10-01), Schantz
patent: 4408518 (1983-10-01), Diel et al.
patent: 4561342 (1985-12-01), Calvert
patent: 4622886 (1986-11-01), Imada et al.

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