Vented ball valve with lock-out ring
US5785074A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 2, 1997 |
| Grant date | Jul 28, 1998 |
| Priority date | — |
| Expiry date | Jan 2, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86646
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a ball valve with a shear stem which can be utilized in combination with a conventional ball valve or vented ball valve. The ball valve with a shear stem is utilized with a conventional ball valve or a vented valve assembly including a valve body having a vent hole therein. The ball valve defines a body having first and second flow-through ends with a valve member receiving chamber thereinbetween, and a collar defining a stem receiving passage communicating with the chamber. A valve member such as a ball or cylindrical plug is disposed within the chamber. The valve member has a throughbore therein in operable alignment with the first end second flow-through ends. The vented ball valve embodiment has at least one valve member vent hole through the wall of the valve member in flow communication with the throughbore. A shear stem extends through and is rotatably mounted within the stem receiving passage and engageable with the valve member for rotating the valve member in and out of flow-through alignment. The vented valve embodiment includes a venting means in cooperation with the shear stem providing selected flow communication with the atmosphere th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.