Height adjustor for furniture
US4485996A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1982 |
| Grant date | Dec 4, 1984 |
| Priority date | — |
| Expiry date | Jan 6, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C3/30
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A height adjustor for funiture, such as chairs, and the like, comprises a pair of telescoping tubular members which interconnect base and seat portions of a chair and form a supportive pedestal therefor. A ram is mounted in the tubular members, such that extension and retraction of the ram respectively raises and lowers the chair seat. The ram and tubular members are sized in a manner to form an annular space therebetween which permits the ram to assume an eccentric position in the tubular members during a loaded chair condition. The ram ends are pivotally connected in the tubular members, such that lateral forces (as distinguished from vertical forces) which are applied to a chair seat are supported primarily by the tubular members, and are not transmitted to the ram.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.