Bridges – Gangway – ramp – or dock leveler – Attached
Patent
1978-01-27
1979-02-06
Byers, Jr., Nile C.
Bridges
Gangway, ramp, or dock leveler
Attached
E61D 100
Patent
active
041375874
ABSTRACT:
A dockboard apparatus is disclosed in which a vertically displaceable chassis moves a pivotally mounted ramp between a vertical storing position and a horizontal working position. Skewing and binding of the chassis are prevented by a construction wherein a counterweight for the chassis is coupled to the chassis by first and second spaced hubs, such as chain sprockets, and first and second linkages, such as drive chains, connected between the chassis, hubs, and counterweight. To facilitate movement of the ramp into place, the support of the dockboard apparatus includes an upper support member having an upper rear part disposed substantially at the same level as the loading surface of the loading dock and an upper front part disposed substantially below the level of the upper rear part. This member may be embodied by an L-shaped beam with vertical and horizontal legs. The hubs are mounted on the upper front part, e.g., on the horizontal leg of the L-shaped beam. With this construction, the ramp may assume a pronounced forward, downward inclination from the loading surface of the loading dock during movement between the storing and working positions.
REFERENCES:
patent: 3426377 (1969-02-01), Bezkwith
patent: 3440673 (1969-04-01), Kezley
patent: 3596303 (1971-08-01), Kezley
patent: 3806976 (1974-04-01), Yoon
patent: 3840930 (1974-10-01), Waddell
Byers Jr. Nile C.
Mack Peter G.
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