Adjustable lumbar support mechanism for a vehicular seat
US5088790A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 1990 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | May 21, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60N2/666
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An adjustable lumbar support mechanism (20) includes a screw shaft (36) having spaced apart right hand (38) and left hand (40) thread convolutions. A traveling nut (42, 44) is disposed in coacting engagement with each of the right hand (38) and left hand (40) threads for linear movement in opposite directions along the screw shaft (36). A pair of links (50, 58) are pivotally attached to each other and at opposite ends to each of the traveling nuts (42, 44) such that movement of the nuts (42, 44) along the screw shaft (36) laterally displaces the links (50, 58). A pressure applicator (68) is attached to the links (50, 58) by a universal joint connection (66). The screw shaft (36) extends outwardly from the seat (22) to an external hand crank (106). The assembly is disposed in a vehicular seat (22) such that movement of the pressure applicator (68) causes an alteration in the contour of the lumbar region (28) of the seat (22) thereby providing adjustable lumbar support.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.