Metal-to-metal seat hub seals
US4264054A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 30, 1978 |
| Grant date | Apr 28, 1981 |
| Priority date | — |
| Expiry date | Oct 30, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S285/917
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve has a metal-to-metal seal system between the flow bores of the valve body housing and each of the valve seat hubs. Each seal system includes an elastic dished metal ring gasket and a retainer ring. Each metal gasket is softer than each of the seat hub and the valve housing, is of rectangular cross-section, and the edge at the inner periphery on the convex side is flattened. Each seal system is disposed on an annular groove cut in the outer periphery surface of the end of the seat hub. One side of the metal ring gasket is located adjacent to the shoulder of the seat hub formed by the groove cut into the outer periphery end of the seat hub. The retainer ring is reciprocably mounted on the seat hub groove adjacent to the other side of the metal ring gasket and extends beyond the end of the seat hub prior to activation of the seal system. Each seal system is activated by insertion of the seat hub on which it is mounted into the corresponding bore of the valve housing until the end of the seat hub contacts a stop shoulder in the bore. The stop shoulder of the valve bore causes the retainer ring to advance towards the seat hub shoulder far enough to flatten out the dished metal r…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.