Bridges – Gangway – ramp – or dock leveler
Patent
1991-08-01
1993-05-25
Melius, Terry Lee
Bridges
Gangway, ramp, or dock leveler
14 711, 14 715, 414401, B65B 2102, E01D 100
Patent
active
052128466
ABSTRACT:
A vehicle restraint is provided for securing a parked vehicle against a loading dock while the vehicle is being loaded or unloaded. The restraint includes a housing for below-ground installation and in which a ram is stored. The ram is mounted in the housing for vertical movement through an opening in the top of the housing, allowing the ram to move between a stored position and a raised position. Doors are provided for closing the opening in the top of the housing when the ram is in the stored position. A hydraulic cylinder is provided for moving the ram. A hook assembly is attached to the top of the ram for releasably retaining the vehicle. The hook assembly includes a hook in a stepped configuration to enable engagement of ICC bars having various heights and positioned various distances away from the loading dock wall. A sensor is provided for detecting when the hook engages the ICC bar of the vehicle and to stop the vertical movement of the ram when such engagement has been made. The hook assembly is pivotable about a vertical axis to permit controlled angular adaptation to the ICC bar when the vehicle is not parked at right angles to the loading dock wall. An automatic release mechanism is provided to protect the cylinder.
REFERENCES:
patent: 4553895 (1985-11-01), Ellis
patent: 4605353 (1986-08-01), Hahn et al.
patent: 4630989 (1986-12-01), Davey
patent: 4664582 (1987-05-01), Edmeads
patent: 4767254 (1988-08-01), Kovach et al.
patent: 4784567 (1988-11-01), Hageman et al.
patent: 4915568 (1990-04-01), West
patent: 5054237 (1991-10-01), Kapala
Connolly Nancy P.
Melius Terry Lee
Rite-Hite Corporation
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