Fitting for insulated duct
US4009894A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1976 |
| Grant date | Mar 1, 1977 |
| Priority date | — |
| Expiry date | Jan 16, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F13/0209
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Disclosed is a fitting having an attachment configuration for end-to-panel securing of the fitting to an insulated duct. The fitting is provided with a standing flange spaced from the end margin of the fitting a distance substantially equal to the thickness of the insulated duct wall adjacent the opening therein and limiting the depth of insertion of the fitting into the opening. An outwardly extending tab or flange is located on one portion of the end margin of the fitting and is adapted to back the adjacent duct wall. A separate member, L-shaped in cross-section, is attached to an opposite portion of the end wall margin after insertion of the fitting, one leg of the L-shaped member backing the adjacent duct wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.