Stop valve
US5170992A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 20, 1991 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | Nov 20, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K5/204
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A stop valve (1) comprises a housing (2) having a passage (15) for a reversible medium flow, which can be stopped by means of a valve body (20) having an annular portion of a sphere as a sealing surface (25) and a flat end portion (26). The transfer area between said sealing surface (25) and said flat end portion (26) having a very small bending radius (r) and the spherical radius (r1) of said sealing surface (25) is smaller than the turning radius (r2) of said valve body. The valve body (20) cooperates with a sealing ring (36), which is annular and surrounds the passage and has an annular body (37), which via a constriction (38) merges into a seat ring (39). The sealing ring (36) is, in the closing position of the valve, exposed with a smaller portion to that passage section, which houses said valve body, and with a larger portion to the other passage section. The mounting of said valve body ( 20) cooperates with a sealing ring (36), which is annular and surrounds the passage and has an annular body (37), which via a constriction (38) merges into a seat ring (39). The sealing ring (36) is, in the closing position of the valve, exposed with a smaller portion to that passage section…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.