Plug valve having seal segments with booster springs
US6554249B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2001 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Jun 25, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K5/188
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention is directed to a plug valve comprising a body which includes an inlet port, an outlet port and a cavity that is connected between the inlet and outlet ports; first and second seal segments which are mounted in the cavity and which each comprise a through bore that is coaxial with the inlet and outlet ports; the through bores and the inlet and outlet ports defining a flow passage through the body; a plug member which is rotatably positioned between the first and second seal segments and which includes a hole that extends transversely therethrough; the plug member being rotatable between an open position in which the hole is aligned with the flow passage and a closed position in which the hole is offset from the flow passage; and at least a first booster spring which is positioned between the first seal segment and the body to bias the first seal segment against the plug member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.