Removable shutter for an orifice accessible only through a narrow passage
US4782863A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1987 |
| Grant date | Nov 8, 1988 |
| Priority date | — |
| Expiry date | Aug 24, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E30/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The shutter is composed of an assembly three independent panels comprising: a central panel (2) having a flange (6) for fastening to the orifice to be closed and having a seal and two rectilinear lateral rims (16, 18), and two side panels (1, 3), each comprising, on one part of its periphery, a flange (5, 7) for fastening on the periphery of the orifice to be closed, and which is provided with a seal, and, on the other part of its periphery, a rectilinear rim (12, 14) which forms a face for support on one of the lateral rims (16, 18) of the central panel (2) and on which are mounted members (20) for positioning the side panels (1, 3) on one of the lateral rims (16, 18) of the central panel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.