Telescoping crane boom with locking and indicator means

Details Telescoping crane boom with locking and indicator means Telescoping crane boom with locking and indicator means

1986-05-12

1987-05-12

Peters, Jr., Joseph F.

Traversing hoists

Having vertically swinging boom

Having means to swing boom vertically

212229, 212230, 212264, 52116, B66C 2364

Patent

active

046642722

ABSTRACT:
A power actuator on the base section of a multisection telescoping crane boom can bridge at least one intermediate boom section to operate a biased locking pin retract mechanism employed in a system for remotely controlling the operation of a manual fly section of the telescoping boom. To enable the crane operator to know with certainty that the biased locking pin is in a fully engaged position, a visual indicator on the boom readily viewable from the crane operator's cab is directly mechanically linked to the biased locking pin and moves to the indicating position only when the locking pin is fully engaged.

REFERENCES:
patent: 2924107 (1960-02-01), Fresaid et al.
patent: 3346281 (1967-10-01), Thompson
patent: 3386594 (1968-06-01), Grove
patent: 3398645 (1968-08-01), Nansel
patent: 3841494 (1974-10-01), Chalupsky et al.
patent: 3842985 (1974-10-01), Svede
patent: 3921819 (1975-11-01), Spain
patent: 4036372 (1977-07-01), Rao et al.
patent: 4327533 (1982-04-01), Sferner
patent: 4433515 (1984-02-01), Mentzer
patent: 4434902 (1984-03-01), Goode et al.

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