Check valve
US4971093A · kind A · utility
11Cited by
7References
3Claims
0Family size
Inventor
Key dates
| Filing date | Feb 13, 1990 |
| Grant date | Nov 20, 1990 |
| Priority date | — |
| Expiry date | Feb 13, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7938
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a check valve wherein a possible malfunction resides in a thread pipe end being seat too far into the valve housing in a position to make a contact with the movable head or poppet of the valve and thus undesirably close the valve, vanes are provided in certain locations on the head or poppet that will themselves to contact the pipe end under pressure conditions and provide flumes for the fluid to flow through, in spite of the condition stated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.