Electrically actuated dock leveler
AssigneeUnited Dominion Industries, Inc.
InventorJames C. Alexander
Life of this patent
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Abstract
A 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 and supports the deck. An electric actuator is coupled to the deck and the frame and moves the deck from a generally horizontal stored position into an operative position. A control circuit is employed for controlling operation of the electrical actuator. The actuator carries a limit switch which is responsive to movement so that power is terminated to the actuator when the deck reaches either a stored or operative position.
Claims20
A dock leveler comprising:
- a frame adapted to be fixedly mounted at a dock;
- a deck, pivotedly mounted to said frame at one end thereof, and having a pivotable lip at the other end thereof;
- a compression spring attached to said deck and said frame to support said deck independently from said actuator:
- an electric actuator coupled to said deck and said frame, said electric actuator moving said deck from a generally horizontal stored position into an operative position, and a circuit for controlling operation of said electrical actuator.
A pit type dock leveler comprising:
- a frame fixedly mounted in a pit at a dock;
- a pivotal deck mounted to said frame at one end of the deck;
- an electric actuator coupled to said deck and said frame, said electric actuator moving said deck form a generally horizontal stored position into an operative position,
- a guide tube for said actuator, said guide tube also housing a movable arm, a limit switch carried by said actuator and responsive to movement of said arm to terminate power to said actuator as said actuator retracts.
Dependencies are inferred from the claim text.