Packing device for rotary valves
US6561517B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 16, 2001 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Jul 16, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/18
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A packing device, for sealing a longitudinal shaft against leakage of a pressurized fluid, having an elongate valve housing with an annular internal chamber about a coaxial rotatable shaft. The chamber has an inner end with an annular stationary packing support shoulder exposed to pressurized fluid and an outer end with an annular packing access opening exposed to ambient air pressure. Annular self travelling pressure energized retained chevron packing is disposed within the chamber, an inner end thereof engaging the stationary packing support shoulder. An axially slidable ring engages an outer end of the packing, and gland housing engages an outer end of the slidable ring. The gland housing includes compression mountings for loading the packing. For limiting the axial movement of the ring within the chamber when the gland housing is removed, the valve housing includes an annular groove within which a floating retaining clip is slidably disposed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.