Variable lip throw-out for dockboard
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United States of America Patent
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-
Jul 3, 1990
Grant Date -
N/A
app pub date -
Jun 1, 1989
filing date -
Jun 1, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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