Piloted check valve
US4793590A · kind A · utility
22Cited by
15References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 14, 1983 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | Apr 14, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K15/18
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A piloted check valve includes a closure that is pressure balanced to relieve pressure on non-metallic seat when valve is closed against high pressure differential. The closure includes a disc having a stem moving in a sealed chamber communicating through the stem and disc with the interior of the valve seat opening. The chamber is provided by a cylindrical wall received in a socket in the valve body. The closure disc has a lip engaging the seat, the lip I.D. being about equal to that of the seat opening and the valve stem.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.