Self aligning spherical backseat assembly for a valve
US8672290B2 · kind B2 · utility
1Cited by
28References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2012 |
| Grant date | Mar 18, 2014 |
| Priority date | — |
| Expiry date | Aug 28, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K43/008
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A gate valve assembly having a body, a gate, a stem, and a backseat for sealing between the stem and the body. The backseat is an annular member with a complementary surface on its inside that fits over a spherically shaped section of the stem; thus allowing the backseat to rotate and pivot with respect to the stem. An outer surface of the backseat is beveled for sealingly engaging a stem passage formed through the body. A flex member is provided that is for sealing a surface adjacent the backseat. The flex member can form a seal between the backseat member and the stem or between an annular retainer and the backseat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.