Seal for a drive journal of a ball valve
US4103909A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1977 |
| Grant date | Aug 1, 1978 |
| Priority date | — |
| Expiry date | Sep 29, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K41/046
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A seal for a drive journal of a ball valve. The elements which directly carry out the sealing action are arranged below a thrust collar which is directed against the cover of the ball valve and is displaceable in the axial direction with the aid of set screws which extend through the cover. The sealing ring is a U-ring which abuts the thrust collar and the walls of the drive journal and the housing. The U-ring is provided with an annular slot which is open toward a thrust ring and, at its deepest portion, has a metallic compensating ring followed by a spiral ring. The present invention relates to a seal for a drive journal of a ball valve, according to which the elements which directly carry out the sealing action are arranged below a thrust collar which is directed against the cover of the ball valve and is displaceable in the axial direction with the aid of set screws which extend through the cover. Such drive journal seals require a construction and arrangement of the sealing elements which guarantees a good seal between the drive journal and the housing even with an off-center positioning of the drive journal. It is known to satisfy this requirement by providing so-called cover…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.