Bridges – Gangway – ramp – or dock leveler – Attached
Patent
1976-01-26
1976-12-07
Byers, Jr., Nile C.
Bridges
Gangway, ramp, or dock leveler
Attached
B65G 1100
Patent
active
039953424
ABSTRACT:
A dockboard incorporating a truck bed sensing mechanism. The dockboard includes a ramp which is hinged at its rear edge to the loading dock and a lip is pivoted to the forward edge of the ramp and is movable between a downwardly hanging pendant position and an extended position. Safety legs are mounted on the underside of the ramp and are movable between an upright operable position, in which the legs support the ramp against downward movement, and a retracted or inoperable position. Pivoted to the underside of the lip are a series of truck bed sensors which are provided with a shorter length than the lip. The sensors are operably connected to the safety legs, whereby downward movement of the sensors from an extended position will effect movement of the legs to the supporting position. The lip, when in the extended position, and the sensors are adapted to engage a truck bed during a loading or unloading operation. If a truck pulls away from the dock with a load on the ramp, the sensors, being of a shorter length than the lip, will lose contact with the truck bed before the lip loses contact with the truck bed, so that the sensors will pivot downward while the lip is still extended, thereby enabling the legs to move to the supporting position to restrain downward movement of the ramp when the truck bed moves out of engagement with the lip.
REFERENCES:
patent: 3137017 (1964-06-01), Pfleger
patent: 3858264 (1975-01-01), Kuhns
patent: 3877102 (1975-04-01), Artzberger
patent: 3902213 (1975-09-01), Pfleger
Byers Jr. Nile C.
Kelley Company Inc.
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