Ball valve to relieve cavity pressure
US4236691A · kind A · utility
14Cited by
11References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 29, 1978 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | Nov 29, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K5/0668
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Disclosed is a ball valve with seats having means to relieve harmful build-up of cavity pressure. The heel of the valve seat has grooves therein allowing cavity pressure to be applied over a portion of the seat surface in a fashion that produces a resultant force in a lip region of the seat. This resultant force causes the lip region of the seat temporarily to move away from the ball and thus vent the cavity pressure to a lower pressure zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.