Lumbar support device
US5423593A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 11, 1994 |
| Grant date | Jun 13, 1995 |
| Priority date | — |
| Expiry date | Mar 11, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60N2/6673
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A lumbar support device for an automotive seat, which comprises a drive mechanism, a crank-like rod operatively connected to the drive mechanism, an elastic synthetic resin support plate, the upper part of which is movably secured to a seat back frame within a seat back of the seat, and a lumbar support portion defined in the lower part of the support plate. The lumbar support portion is formed in a cambered or forwardly curved shape. A forward and backward displacement of the support plate may be ajustably effected by the drive mechanism and crank-like rod to apply a pressure against the lumbar support area of foam cushion member of the seat back, and because of integral formation of both support plate and lumbar support portion, a gradual pressure gradient or distribution may be attained in the seat back cushion member, without creating a local non-pressure or extremely soft spot therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.