Seat backrest having an adjustable lumbar support
US4449751A · kind A · utility
59Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 26, 1981 |
| Grant date | May 22, 1984 |
| Priority date | — |
| Expiry date | May 26, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60N2/66
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A seat backrest having an adjustable lumbar support is provided wherein the cam surface of a rotatable cam of a regulating mechanism, which adjusts the lumbar support, is effectively utilized to facilitate manual adjustment of the lumbar support. Rotation of the cam in a first direction cams a follower away from the axis of rotation of the cam. The follower causes an attached bar to rotate therewith. A lumbar support plate is supported by a cantilevered resilient or rigid element in the form of a leaf spring which is supported by the bar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.