Load absorbing operator restraint bar
US6732829B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 1, 2002 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Jul 1, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2021/0206
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An operator restraint bar or seat bar has side arms that are pivotally mounted to a rear wall of a loader cab, and a front lap bar. The restraint bar is mounted with a spring that will absorb energy when the front lap bar is moved in a forwardly direction. A spring also provides forces for urging the seat bar assembly to a working or restraining position. After the seat bar assembly has been pivoted away from its working position a desired amount, the spring urges the seat bar assembly toward a raised position. In one form of the invention, a single spring on each side arm performs all of the functions of absorbing energy and urging the restraint bar toward its working position and after initial upward movement, toward a raised position. The energy absorption can be accomplished by spring loading the vertical and horizontal arm section in various ways, so a change in angle between them adds energy to an energy absorbing member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.