Chimney cleaning device
US4873739A · kind A · utility
4Cited by
3References
2Claims
0Family size
Inventor
Key dates
| Filing date | Apr 5, 1988 |
| Grant date | Oct 17, 1989 |
| Priority date | — |
| Expiry date | Apr 5, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23J3/026
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
This invention relates to two or more flat flexible membranes segmented into blades for cleaning chimneys and conduits. Said membranes can be lowered into a chimney by gravity and with only light contact with the interior surface of the chimney. The blades comprising the membrane are forced into firm and maintained contact, with the interior surface of the chimney when moved through the chimney in the upward direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.