Manual operating means for valves
US6583435B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 2, 2001 |
| Grant date | Jun 24, 2003 |
| Priority date | — |
| Expiry date | Oct 25, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7881
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A manual operating means for the manual emergency and/or auxiliary operation of a normally electrically or pneumatically actuated valve. Same comprises a manual operating member which in a ready for use condition is so fixed at a housing recess in the valve in a sealing manner that its inner side faces the interior of the housing recess and its outer side is accessible for the application of a manual operating force. The manual operating member is provided with venting means which, in order to avoid the establishment of gage pressure in the housing recess due to leakage, render possible the flow of air from the inner side to the outer side thereof and in the opposite direction prevent the entry of foreign matter in the opposite direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.