Vacuum valve
US6431518B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 11, 2001 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Jan 21, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K51/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A vacuum valve comprises a valve opening which is provided in a valve housing and can be closed by a valve plate arranged at least one valve rod, at least a first piston-cylinder unit by which the valve plate is displaceable from its open position releasing the valve opening into a position which is located opposite the valve opening but is lifted from the valve seat, and at least a second piston-cylinder unit by which the valve plate can be moved toward the valve seat and pressed against it from its position which is located opposite the valve opening but is lifted from the valve seat. A first connection line runs between a base of the first piston-cylinder unit and a base of the second piston-cylinder unit, wherein a non-return valve is arranged in the first connection line and closes when there is a pressure in a closing cylinder space of the first piston-cylinder unit that is greater than or equal to the pressure in a closing cylinder space of the second piston-cylinder unit, and a mandrel is provided at the piston of the second piston-cylinder unit, which mandrel releases the non-return valve when the valve plate is in the position in which it is completely lifted from the val…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.