Lance construction for boiler cleaning apparatus
US4209028A · kind A · utility
15Cited by
2References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 29, 1979 |
| Grant date | Jun 24, 1980 |
| Priority date | — |
| Expiry date | May 29, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28G1/16
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A lance tube for soot blowers having a steam nozzle near its end, a liquid nozzle spaced rearwardly from the steam nozzle, and a thermostatically operable valve interposed between the nozzles which closes off the steam nozzle when liquid at a temperature lower than that of steam is in the lance tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.