Variable lip throw-out for dockboard

Details Variable lip throw-out for dockboard Variable lip throw-out for dockboard

1989-06-01

1990-07-03

Massie, IV, Jerome W.

Bridges

Gangway, ramp, or dock leveler

Attached

14 713, E01D 100

Patent

active

049379062

ABSTRACT:
A dockleveler employs a lip counterbalance mechanism to increase the force of the lip counterbalance spring as the deck is raised. A linkage is coupled at one end to the dockboard lip and at the other end to a level assembly. The lever in turn is adjustably coupled to the lip spring. As the dockboard is raised, a chain coupled to the frame and the linkage exerts a force causing initial raising of the lip while pivoting the linkage downward. This in turn causes the lever to rotate such that the force on the lever pushes the linkage further raising the lip.

REFERENCES:
patent: 3982295 (1976-09-01), Burnham
patent: 4402100 (1983-09-01), Slusar

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