Crane counterweight and handling method

Details Crane counterweight and handling method Crane counterweight and handling method

1980-08-14

1982-12-14

Love, John J.

Traversing hoists

Having counterweight or counterbalancing means

Counterweight movable relative to load support

414719, 212178, 280759, B66C 2376

Patent

active

043634125

ABSTRACT:
An extremely massive mobile crain counterweight requiring demounting from the crane rotary superstructure for separate transport or storage has self-contained raising and lowering mechanism which may be powered from the crane carrier and which forms a part of the counterweight mass. The internal counterweight mechanism is shielded from ballast, such as shot, which fills the interior of the counterweight. A foot plate forming a part of the raising and lowering mechanism of the counterweight is lockable in extended and retracted positions and is constructed for interlocking engagement with a locator structure on the crane carrier. An efficient and simplified sequence of counterweight manipulating steps is enabled.

REFERENCES:
patent: 3375021 (1968-03-01), Grider
patent: 3734319 (1973-05-01), Frisk
patent: 3822791 (1974-07-01), Eiler
patent: 3891095 (1975-06-01), Symmank
patent: 4142642 (1979-03-01), Meyers
patent: 4286720 (1981-09-01), Atkinson

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