Remotely operable latch and locking pin for a multi-section boom

Details Remotely operable latch and locking pin for a multi-section boom Remotely operable latch and locking pin for a multi-section boom

1981-11-04

1984-02-28

Friedman, Carl D.

Static structures (e.g., buildings)

Mechanism operated relatively movable shaft assembly

Fluid pressure actuated

52632, 212268, B66C 2306

Patent

active

044335156

ABSTRACT:
A multi-section hydraulically operated telescoping crane boom includes a manual fly section which may be safely extended and retracted, securely latched in the extended position and pin locked by remote operation of a biased hydraulically powered latching plunger and a biased cooperative hydraulically powered locking pin both embodied in a static pressure hydraulic circuit which includes a pressure-responsive indicator to indicate when the latching plunger is engaged. The circuit also includes safety interlocks for the cooperative latching plunger and locking pin preventing their operation in improper sequence.

REFERENCES:
patent: 3346281 (1967-10-01), Thompson
patent: 3842985 (1974-10-01), Svede
patent: 3921819 (1975-11-01), Spain

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