Crane with outboard counterweight carrier

Details Crane with outboard counterweight carrier Crane with outboard counterweight carrier

1984-06-04

1985-09-10

Blix, Trygve M.

Traversing hoists

Having counterweight or counterbalancing means

Counterweight movable relative to load support

212178, 212198, B66C 2376

Patent

active

045400970

ABSTRACT:
Disclosed is a crane wherein a trailer-like counterweight carrier has a horizontal motion transmitting connection with a platform which is swivelably mounted on a crane base and which supports the boom and the mast of the crane. Guy connections between the counterweight carrier and the top of the mast and between the mast and the boom translate forward tilting force that a lifted load imposes upon the boom into lifting force on the counterweight carrier. A lost motion connection between the counterweight carrier and the platform comprises rigid members. It allows the carrier to be lifted to a predetermined height above the ground and at that point imposes upon the crane chassis further lift force upon the counterweight carrier, so that the crane base cooperates with the counterweight in resisting forward tilting of the boom under heavy loads. The lost motion connection requires no adjustment to adapt it for different loads and different inclinations of the boom and mast.

REFERENCES:
patent: 2068397 (1937-01-01), Chapman
patent: 3842984 (1974-10-01), Brown et al.
patent: 3930583 (1976-01-01), Jouffray
patent: 4042115 (1977-08-01), Beduhn et al.
patent: 4170309 (1979-10-01), Lampson
patent: 4243148 (1981-01-01), Lampson
patent: 4258852 (1981-03-01), Juergens
patent: 4280627 (1981-07-01), Becker
patent: 4316548 (1982-02-01), Helm et al.
patent: 4349115 (1982-09-01), Lampson
patent: 4382519 (1983-05-01), Beduhn et al.

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