Boom latch

Details Boom latch Boom latch

1995-02-01

1996-07-23

Merritt, Karen B.

Traversing hoists

Boom position lock

212300, 292216, 403322, 182 2, B66C 2342

Patent

active

055381502

ABSTRACT:
A boom assembly includes a boom arm movable away from and into a first position used for storage and transport of the boom assembly, and a boom latch positioned adjacent a free end of the boom arm when the boom arm is in the first position for restricting the movement of the boom arm out of the first position during transport of the boom assembly. The boom latch includes a lock member, a latch hook movable from a closed position wherein the lock member is retained in the latch hook to an open position wherein the lock member is not retained in the latch hook, and a latch hook control unit for alternately locking the latch hook in the closed position and unlocking the latch hook so that the latch hook is free to move from the closed position to the open position.

REFERENCES:
patent: 1955969 (1934-04-01), Marzolf
patent: 2394314 (1946-02-01), Le Tourneau
patent: 2699314 (1955-01-01), Beale
patent: 3572793 (1971-03-01), Cole
patent: 4303165 (1981-12-01), Cassens et al.
patent: 4492311 (1985-01-01), Rathe
patent: 4534444 (1985-08-01), Smith
Dur-A-Lift DFSL-37 Advertisement, 1988.
Dur-A-Lift UFN-32 Advertisement, 1984.

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