Insulated chimney assembly
US4502370A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1983 |
| Grant date | Mar 5, 1985 |
| Priority date | — |
| Expiry date | Apr 15, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23J2213/202
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Linear sections (101) of a chimney assembly (100) each include concentric outer, intermediate and inner sleeves (102, 104, 106). The inner sleeve (106) is interconnected at its lower portion (140) to the intermediate sleeve (104) through spaced apart U-shaped clips (142), while the upper portion of the inner sleeve (106) is allowed to float. The inner sleeve (106) is thus spaced apart from the intermediate sleeve (104) with an insulative air gap (136) therebetween. The air gap (136) and the particular connective arrangement of the inner sleeve (106) to the intermediate sleeve (104) allows for both linear and radial thermal expansion of the inner sleeve (106) caused by high temperature waste flue gases, and also facilitates engagement of adjoining linear sections (101).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.