Truck locking device
US4488325A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1982 |
| Grant date | Dec 18, 1984 |
| Priority date | — |
| Expiry date | Apr 12, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G69/003
- WIPO fieldHandling
- WIPO sectorMechanical engineering
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 mo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.