Device for closing an opening of a tank or a tubular conduit
US6056266A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 20, 1998 |
| Grant date | May 2, 2000 |
| Priority date | — |
| Expiry date | Oct 20, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/122
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A device for closing an opening of a tank or a tubular conduit and including a plate for closing the opening and movable substantially perpendicular to a plane of the opening toward the opening to be pressed against a wall in which the opening is formed and away from the opening, and displaceable, in its position in which it is spaced from the opening, substantially parallel to the plane of the opening, first and second piston-cylinder units for displacing the closing plate parallel to the plane of the opening and perpendicular to the plane of the opening respectively, with each piston-cylinder unit having a housing with a cylinder bore and at least one piston displaceable in the cylinder bore relative to the housing, and conduits for communicating pressure medium to the cylinder bores of both piston-cylinder units for displacing respective pistons in respective bores.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.