Guillotine damper
US4493311A · kind A · utility
12Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 19, 1983 |
| Grant date | Jan 15, 1985 |
| Priority date | — |
| Expiry date | Oct 19, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23L13/06
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A guillotine damper for use in exhaust or like duct systems which must be entered by men for servicing has its frame provided with guides extending about the flow path from one end of the opening by which the blade enters an air tight bonnet to the other end thereof and enclosed by resiliently flexible metal seals. The blade has marginal channels coextensive with the guides with the channels closely fitting the guides and compressing the sides of the seals with zero leakage attained by sealing air discharged along the channels during movement of the blade and while the damper is closed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.