Method and apparatus for shielding a valve gate and other valve parts
US6448567B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2000 |
| Grant date | Sep 10, 2002 |
| Priority date | — |
| Expiry date | Apr 25, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K3/0209
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for shielding a valve gate from potentially harmful environmental conditions. A valve gate can be moved from a closed position, in which the valve gate closes a valve passage and is potentially exposed to harmful environmental conditions, to a retracted position, in which the valve gate is shielded from the harmful environmental conditions. For example, the valve gate can be retracted inside a housing and a door can be closed over an opening in the housing to protect the valve gate. Other portions of the valve, such as a valve seat, can also be protected from harmful conditions, e.g., by closing a valve seat opening to prevent substances or other environmental conditions from leaving the valve passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.