Dock leveler with automatic vehicle barrier

Details Dock leveler with automatic vehicle barrier Dock leveler with automatic vehicle barrier

1988-10-13

1990-05-01

Massie, IV, Jerome W.

Bridges

Gangway, ramp, or dock leveler

Attached

14 713, E01D 100

Patent

active

049205986

ABSTRACT:
A dock leveler is provided having an automatically actuated barrier for preventing accidental runoff of material handling equipment from a loading dock. The leveler includes a ramp pivotally mounted on the loading dock for selected movement from a stored position wherein the exposed upper surface of the ramp is level with the platform surface of the dock. A lip is hingedly connected to the front edge portion of the ramp and when in a depending first position supports the ramp in the stored position. When in the first position, a portion of the lip protrudes above the plane of the ramp upper surface and forms a vehicle barrier. Upon the ramp being actuated from the stored position to a raised position, the lip automatically slides relative to the ramp to a depending second position whereby no portion of the lip forms a protruding vehicle barrier. The lip is adapted to assume a cantilevered third position, when the ramp is in the raised position, thereby forming an extension of the ramp and spanning a gap forming between the front edge of the ramp and the rear end of the bed of a vehicle parked at the dock. When in the third position, no portion of the lip forms a protruding vehicle barrier.

REFERENCES:
patent: 2993219 (1961-07-01), Pennington
patent: 3280414 (1966-10-01), Layne
patent: 3424323 (1969-01-01), Barnaby
patent: 3486181 (1969-12-01), Hecker et al.
patent: 3786530 (1974-01-01), Le Clear
patent: 3872948 (1975-03-01), Richards
patent: 4155468 (1979-05-01), Royce
patent: 4848732 (1989-07-01), Rossato

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