Sofa bed with closing and opening assist
US4918770A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1988 |
| Grant date | Apr 24, 1990 |
| Priority date | — |
| Expiry date | Nov 21, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C17/225
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A sofa bed having a foldable bed frame including a main section, center section and front section which are coplanar with one another when the frame is in the bed configuration. A mattress is supported by the foldable frame and folds with it when the bed is closed or stored in the sofa frame. When the foldable bed frame is partially folded, the front section does not fully compress the mattress between the main and front sections. When the partially folded bed frame is moved to the fully folded position inside the sofa frame, a series of links causes the front section of the bed frame to move to a horizontal position and fully compress the mattress. In this fashion, the stored energy in the mattress is reduced when the frame is partially open so as to reduce the possibility of injury to the operator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.