Port rodder with anti-drift feature
US5070823A · kind A · utility
16Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1991 |
| Grant date | Dec 10, 1991 |
| Priority date | — |
| Expiry date | Jan 24, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23J3/00
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An anti-drift mechanism for a downwardly oriented port rodder for cleaning a port opening of a recovery boiler. The anti-drift mechanism prevents a cutter of the rodder from accidentally drifting from a retracted holding position into the port upon the loss of holding power to the actuator. Two embodiments are disclosed. The first is a frictional engagement with the port rodder while the second involves the use of a valve in conjuction with the actuator to trap fluid pressure and maintain the rodder in the holding position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.