B - Operations – Transporting – 66 – C
Patent
B - Operations, Transporting
66
C
294/51
B66C 13/20 (2006.01) B66C 1/66 (2006.01) B66C 15/00 (2006.01)
Patent
CA 1117162
Title of the Invention FORCE LIMITER Abstract of the Disclosure A bidirectional force limiter for limiting the magnitude of a force applied along a line of action to a predetermined magnitude includes a slide assembly sup- ported for reciprocating movement along its longitudinal axis by the spaced guide plates of a support structure. A yieldable force-bias means, such as a helical spring in compression, is constrained between the guide plates, and means are provided for transmitting the applied force from the slide assembly to the biasing means to cause the slide assembly to displace and the biasing means to yield in response to the applied force. The force limiter is suitable for use, in a preferred mode, with cargo-container spreaders which are adapted to attach to and detach from cargo containers. The spreader carries a plurality of locks which are adapted to register with and engage complementary lock receiving structures on each container. A hydraulic actuator is linked to the locks to selectively actuate them between a locked position and an unlocked position to, respectively, attach the spreader to the container and detach the spreader from the container. The force limiter is connected between the hydraulic actuator and the spreader frame to limit the applied locking and unlocking forces to a predetermined, safe magnitude. The force limiter prevents excessively high hydraulic fluid pressure from damaging a jammed lock or over-riding safety devices designed to prevent unlocking when the spreader and attached cargo container are in a suspended position.
334787
Macrae & Co.
R. P. C. Corporation
LandOfFree
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