Base structure in particular for a seat having an adjustable backrest
US4804225A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1986 |
| Grant date | Feb 14, 1989 |
| Priority date | — |
| Expiry date | Nov 10, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60N2/68
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The structure comprises a tubular substantially helical element (16) which forms in succession a base contour (22) and then a member (24, 26) for connection to the floor on which the seat is placed. The upper end portion (18) of the element has extending therethrough a pivot pin (20) for connection to one of the sides of a backrest (1) and is connected by gussets (38, 40) to the connection member The opposite end portion (52) of the tube is connected to the base contour frame by gussets (30, 32). Any force exerted by the backrest on the upper end portion (18) of the tube tends to unwind the substantially helical element and is thus absorbed by the latter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.