Hydraulic circuit for self-undecking crane

Details Hydraulic circuit for self-undecking crane Hydraulic circuit for self-undecking crane

1985-05-07

1986-12-30

Blix, Trygve M.

Traversing hoists

Having means facilitating assembly or disassembly

212189, 91512, 91517, 91530, B66C 2326, B66C 2378, F15B 1100

Patent

active

046322612

ABSTRACT:
A hydraulic circuit for a self-undecking crane having retractable legs with extendable jacks for elevating and supporting the crane upper. Hydraulic cylinders move the legs between a retracted position and an extended position in which the jacks are engageable with the ground and isolation valve devices in the hydraulic circuit prevent retraction of said legs when the crane upper is supported on the extendable jacks.

REFERENCES:
patent: 3814265 (1974-06-01), Miller
patent: 3856152 (1974-12-01), Parrett et al.
patent: 4124226 (1978-11-01), Phillips
patent: 4273244 (1981-06-01), Jensen et al.
patent: 4318550 (1982-03-01), Jacobsen

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