Butterfly valve
US4154426A · kind A · utility
19Cited by
3References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1978 |
| Grant date | May 15, 1979 |
| Priority date | — |
| Expiry date | Jan 23, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/32
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The valve closure element has an annular peripheral groove opening outwardly onto the periphery of the closure element. An annular sealing element has an annular heel portion disposed in the groove. The latter has an inner end face whose diameter is less than the inside diameter of the heel portion. The groove is defined laterally by two confronting annular faces of the closure element which have a substantially rectilinear generatrix and grip the heel portion so as to prevent relative movement of the heel portion and closure element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.