Access door for air flow conduits
US5067278A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 7, 1990 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | Dec 7, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/1041
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A readily demountable door assembly for sealing an aperture in a duct comprises a door member having an inwardly directed ramp or cam which lies within the duct and is inclined outwardly toward the duct surface. A clamp is adapted to be mounted adjacent the aperture of the duct at a position diametrically opposite the ramp. The clamp engages the door and shifts the same in the direction of the ramp, which movement presses the flange of the door tightly against the duct surface, the clamp including portions which overlie the door at positions remote from the ramp to urge such remotely disposed portions of the door against the duct surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.