Scraper
US4986347A · kind A · utility
4Cited by
3References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 1989 |
| Grant date | Jan 22, 1991 |
| Priority date | — |
| Expiry date | May 30, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB08B9/045
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus for the removal of residues from the inner wall of a tube carrying hot gases and/or vapors includes a passage extending into a first end of the tube in an axial direction; an axially extending shaft supported within the passage in an axially displaceable manner so that one end of the shaft is within the tube; a discharge opening in the tube through which the residues may be removed; a helically wound metal scraper connected to the one end of the shaft; and a device for driving the shaft such that the scraper is rotated in a manner of a corkscrew into the tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.