Truck rear door opening mechanism
US6386613B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 2000 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Sep 26, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/544
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A four bar link is provided between a walled cargo area of a truck and a rigid rear cargo door. The effective length of the lower link of the four bar linkage is longer than that of the upper link such that the motion of the door is generally up and over the top of the truck body. An eccentric cam is joined to the upper link with a tensioned spring extending around the cam such that the spring slackens as the door opens. The cam is configured so that, as the door is opened, the spring slackens more slowly initially then more quickly. This allows the door to be moved initially mostly outwardly before moving significantly upwardly and still be effectively counterbalanced throughout its motion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.