Seat cushion and method of manufacturing the same
US6571411B1 · kind B1 · utility
19Cited by
18References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 20, 2000 |
| Grant date | Jun 3, 2003 |
| Priority date | — |
| Expiry date | Jun 23, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60N2/68
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A seat cushion is formed of a lower body and an upper body. The lower body is made of a polyurethane chip molded product containing fibrillated polyurethane chips with radial projections and a binder for binding the fibrillated polyurethane chips. The polyurethane chip molded product has 25 percent ILD hardness of 1,000 to 5,000 N and a density of 150 to 300 kg/M3. The upper body is made of soft polyurethane foam molded on the lower body. The upper body has 25 percent ILD hardness of 60 to 300 N and a density of 20 to 80 kg/M3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.