Telescoping crane arm

Details Telescoping crane arm Telescoping crane arm

1994-04-11

1995-11-14

Kashnikow, Andres

Traversing hoists

Boom or mast

Extensible by sliding sections

B66C 2304

Patent

active

054658551

ABSTRACT:
A telescoping crane arm assembly includes a base body; a power cylinder extendable from and retractable into the base body; a plurality of crane arm segments extendable from and retractable into one another and the base body; a first mechanism coupling the power cylinder to the crane arm segments for extending the crane arm segments as a unit from the base body when the power cylinder moves from a retracted position into an extended position relative to the base body; and a second mechanism coupling the power cylinder to the crane arm segments for extending the crane arm segments relative to one another when the power cylinder moves from an extended position into a retracted position relative to the base body.

REFERENCES:
patent: 3809249 (1974-05-01), Grove
patent: 4156331 (1979-05-01), Lester et al.
patent: 4327533 (1982-05-01), Sterner
patent: 4406375 (1983-09-01), Hockensmith
patent: 4490951 (1985-01-01), Mentzer et al.

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