Multiple hearth furnace
US8382471B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2008 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | Mar 23, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27B9/24
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A multiple hearth furnace including a rabble arm with a tubular structure and a solid plug body. The latter is received in a socket arranged in an arm fixing node. It has an axial through boring and cooling fluid supply and return channels arranged around this through boring. A clamping bolt is rotatably fitted in the through boring. It has a bolt head, which can be brought by rotation into and out of hooking engagement with an abutment surface on the arm fixing node. A threaded end of the clamping bolt sticks out of the through boring at the rear end of the plug body. A threaded sleeve, which is screwed onto this threaded end, bears on an abutment surface at the rear end of the plug body for exerting a clamping force onto the clamping bolt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.