Bridges – Gangway – ramp – or dock leveler – Attached
Patent
1979-08-06
1981-07-28
Byers, Jr., Nile C.
Bridges
Gangway, ramp, or dock leveler
Attached
182 82, E01D 100
Patent
active
042802431
ABSTRACT:
Improvement in a bulk loading facility having a fixed deck having a vertical column as a part thereof and a drop way hinged to the deck so that it can be raised or lowered for loading, the improvement comprising the drop way having a handrail assembly including a handrail and a post for the handrail, the handrail and the post hinged to each other, the post hinged to the drop way, the handrail hinged to the column, and a four-bar mechanism consisting of the drop way, the handrail, the post and a portion of the column between the handrail and the drop way, the four-bar mechanism constructed so that the sum of the lengths of the column portion and the top rail is greater than the sum of the lengths of the drop way and the post, whereby the drop way has an overcenter action during raising thereof which assists in maintaining the drop way in its raised position.
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patent: 4168764 (1979-09-01), Walters
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Byers Jr. Nile C.
Fisher William L.
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