Seat back frame
US5499863A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 1994 |
| Grant date | Mar 19, 1996 |
| Priority date | — |
| Expiry date | May 3, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60N2/682
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The upper frame 3 and a pair of the side frames 5 in the frame body 2 are simultaneously formed by bending the first frame plate 20 which is obtained from a raw flat plate by pressing treatment. And the upper frame 3 is formed into a pipe form having a slit 6 with edge portions and the slit 6 is welded at four positions corresponding to the bending portions 3B and the concave portions 9 in the horizontal portion 3C, thereby the slit connecting portions 10 are formed. Accordingly, based on that main members for constructing the seat back frame 1 are formed from the first flat frame plate 20, number of the members for constructing the seat back frame 1 and process number for assembling thereof can be easily reduced. And in case that weight of a driver is locally loaded on the seat back frame 1, the upper frame 3 can resist twisting moment occurring due to weight of the driver based on high rigidity produced from the slit connecting portions 10, therefore it can prevent the seat back frame 1 from being seriously deformed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.