Backrest adjustment device
US6488336B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 25, 2001 |
| Grant date | Dec 3, 2002 |
| Priority date | — |
| Expiry date | Sep 25, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C7/36
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A backrest adjustment device has a hollow base seat, an oblong panel, a guide mount, a slide seat, a nut, a coiled spring, a compression spring, a positioning plate, a top panel, a screw rod, and a control rod. The positioning plate has a threaded aperture. The guide mount is disposed on the oblong panel. The guide mount has a bottom recess and an oblong hole. The positioning plate is inserted in the bottom recess of the oblong panel. The slide seat has a bottom groove, a slant slot, and a lateral lug. The screw rod has a disk head. The top panel has a plurality of click serrations. The top panel engages with the hollow base seat. The control rod has an oval plate, an extension bar, and a plurality of annular grooves. The screw rod passes through the compression spring, the lateral lug, the coiled spring, the nut, and the oval plate. The extension bar is disposed between the top panel and the hollow base seat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.