Mechanically actuated dock leveler with hydraulic assist
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United States of America Patent
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-
Dec 11, 2001
Grant Date -
N/A
app pub date -
Dec 10, 1999
filing date -
Dec 10, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
A pit type dock leveler having a frame adapted to be fixedly mounted at a dock with a deck, pivotedly mounted to the frame at one end thereof, and having a pivotable lip at the other end. A spring is mounted to the deck and the frame to support and raise the deck the deck. A hydraulic actuator is coupled to the deck and to a pivotable linkage member that is mounted to the frame. In a powered mode, the hydraulic unit acts as a power assist for the springs to move the deck from a generally horizontal stored position into an operative position. A control circuit is employed for controlling operation of the hydraulic actuator. In a manual mode, the linkage and the hydraulic unit act a pivoting follower to deck movement without any extension of the hydraulic unit.
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