Vehicle restraining mechanism
US5203663A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 23, 1991 |
| Grant date | Apr 20, 1993 |
| Priority date | — |
| Expiry date | May 23, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G69/003
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Restraint for preventing inadvertent horizontal movement away from a loading dock of a vehicle on a driveway adjacent the loading dock, the restraint comprising an elongated restraint arm including a bracket at a first end thereof shaped to engage a component of the vehicle, the restraint arm being connected to the driveway for movement of the first end between a lowered position proximate the driveway and a raised position wherein the bracket is disposed to engage the vehicle component, a piston-cylinder arrangement for selectively biasing the restraint arm to the raised position, and a cam structure at the second end of the restraint arm for locking the restraint arm in the raised position in response to a horizontal force acting on the restraint arm in a direction away from the loading dock and for permitting movement of the restraint arm between the raised and lowered positions in response to a horizontal force acting on the restraint arm toward the loading dock or a vertical force acting on the restraint arm toward the driveway.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.