Temporary obturation panel of a passage inside a vessel accessible only through an orifice of smaller size
USRE32832E · kind E · reissue
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1987 |
| Grant date | Jan 17, 1989 |
| Priority date | — |
| Expiry date | Apr 13, 2007 |
Classification
- Technology area (CPC —)General
Abstract
The invention relates to a temporary sealing obturation panel, inside a vessel accessible only through a manhole, of a passage provided on its periphery with a support collar. It is constituted by: panels articulated by flexible fluid-tight hinges, bordered by lines of latching pins, stiffeners comprising lines of holes conjugate with the lines of pins, a frame in at least two articulated parts, with means for gripping the ends of the panels and the stiffeners against the support collar. The invention is applicable to the closing of primary circuit ducts opening into the water box of a steam generator of a pressurized water nuclear boiler.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.