Retractable in house open stairwell cover
US6739100B1 · kind B1 · utility
17Cited by
8References
16Claims
0Family size
Inventor
Key dates
| Filing date | Jan 10, 2003 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Jan 11, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04F11/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A stairwell cover adapted to seal a stairwell opening such as between a first floor living space and a basement when the basement is not in use includes a housing mounted to a wall partition above the base of the stairs, a retractable cover rotatably mounted in the housing, and a pair of roller rails extending along the sidewalls of the stairwell and along which the cover rolls for movement between an retracted position providing open access to the basement and an extended position closing off the basement at the top of the stairwell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.