Bridges – Gangway – ramp – or dock leveler – Attached
Patent
1982-04-12
1984-12-18
Leppink, James A.
Bridges
Gangway, ramp, or dock leveler
Attached
14 711, 414401, E01D 100, B65G 6900, B60D 700
Patent
active
044883250
ABSTRACT:
A device for locking a vehicle to a loading dock during a loading operation. The device includes a frame mounted on the front surface of the dock beneath a pit which houses an adjustable dockboard. A slide assembly is mounted for vertical movement on the frame, and the slide assembly includes a locking member adapted to engage an abutment on the vehicle, as the slide assembly is elevated. To raise and lower the slide assembly, a motor is mounted on the slide assembly and drives a gear that engages a rack carried by the frame. The rack is spring biased to an upper position, and on operation of the motor in one direction, the slide assembly is raised to bring the locking member into engagement with the abutment on the vehicle. Continued operation of the motor will then move the rack downwardly relative to the gear and slide assembly, and downward movement of the rack will activate a switch to cut off power to the motor. After the loading operation is completed the motor is driven in the opposite direction to lower the locking member to its storage position. The movement of the slide assembly and locking member can be tied into the operation of the lip of the dockboard in which the motor will automatically be operated to move the locking member upwardly toward the locking position when the lip is raised from its pendant position, and the motor will be operated in the reverse direction when the loading operation is completed and the lip is returned to its pendant position.
REFERENCES:
patent: 3877102 (1975-04-01), Artzberger
patent: 3995342 (1976-12-01), Wiener
patent: 3997932 (1976-12-01), Artzberger
patent: 4127856 (1978-11-01), Bickel
patent: 4373847 (1983-02-01), Hipp et al.
Bennett David E.
Driear Joseph R.
Hjorth Beverly E.
Kelley Company Inc.
Leppink James A.
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