High pressure tight shutoff valve seal
US3960364A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 1, 1974 |
| Grant date | Jun 1, 1976 |
| Priority date | — |
| Expiry date | Aug 1, 1994 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K1/425
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A tight shutoff valve seal is disclosed, wherein an easily deformable annular valve seal member is retained within an annular groove in a valve element. Protecting this seal member from erosion or damage by a fluid flowing therepast is a slidable seal retaining member which additionally retains the seal member within the groove. The retaining member is resiliently urged to a seal-protecting position when a valve employing this seal is opened, and when the valve is closed the retaining member slides on a surface of the seal member and on a surface of the valve element to allow the seal member to abut and seal against a valve seating surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.