Interlock system for container handler twist lock

Details Interlock system for container handler twist lock Interlock system for container handler twist lock

1980-12-11

1983-09-06

Marbert, James B.

Handling: hand and hoist-line implements

Spacing hoist bar or frame

Load gripping units

B66C 166

Patent

active

044025432

ABSTRACT:
A spreader frame assembly for engaging, lifting and transporting freight containers includes a pair of parallel spaced-apart lifting beams. A twist lock is connected at each end of each lifting beam for engagement with a respective corner fitting of a container. Each twist lock includes a shank projecting downwardly from the respective lifting beam. The lower end of the shank is capable of lifting engagement with the corner fitting when the shank is rotated in a selected direction. A circular disc is rigidly connected to the upper end of each shank. A hydraulically actuated mechanism is connected to simultaneously rotate the shanks. A pin having an enlarged upper portion has a first position where the enlarged upper portion of each of the pins is received in a recessed portion in each respective disc to prevent rotation of the respective shank from its no-lift position, and has a second position where the upper portion of the pin is raised above the disc so that the shank may be rotated to a lift position.

REFERENCES:
patent: 3749438 (1973-07-01), Loomis et al.
patent: 3762754 (1973-10-01), Goyarts
patent: 3764032 (1973-10-01), Ward
patent: 3874719 (1975-04-01), Goyarts
patent: 3892436 (1975-07-01), Fathauer
patent: 4017110 (1977-04-01), Pease et al.
patent: 4258949 (1981-03-01), Keagbine

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