Adjustable seat cushion with tension limiting means
US4712834A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 1986 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Dec 18, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64D11/0647
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A bottom cushion for use in a seat of the type used in situations where an occupant could be subjected to spine damaging injury resulting from rapid vertical acceleration or deceleration. The seat cushion includes a frame mounted above the rigid seat pan of the seat with an air-permeable, flexible membrane suspendingly carried in the frame. The seat cushion is provided with a membrane adjusting mechanism by which an occupant applies tension to the membrane to lift his or her posterior above the seat pan for comfort reasons, and has a vertical displacement limiting mechanism which for safety reasons prevents the occupant from lifting the membrane and his or her posterior an excessive distance above the set pan.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.