Hydraulic locking of the boom to the swivel arm of an excavator,

Details Hydraulic locking of the boom to the swivel arm of an excavator, Hydraulic locking of the boom to the swivel arm of an excavator,

1979-12-31

1982-06-01

Eickholt, E. H.

Excavating

Railway graders

Side former

414723, 414686, E02F 502

Patent

active

043320945

ABSTRACT:
In an excavator, crane or the like comprising a base structure, a swivel arm connected to said base structure and a boom attachment releasably locked to said swivel arm, releasable locking means for said boom attachment comprising at least two locking pins passing therethrough and through said swivel arm, said locking pins being linked to at least one hydraulic piston-cylinder unit for inserting them through and withdrawing them from said boom attachment and swivel arm.

REFERENCES:
patent: 3034587 (1962-05-01), Dorkins et al.
patent: 3204793 (1965-09-01), Lane
patent: 3426929 (1969-02-01), Vik
patent: 3653131 (1972-04-01), Pilch
patent: 3760883 (1973-09-01), Birk

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