Check valve
US5176171A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1991 |
| Grant date | Jan 5, 1993 |
| Priority date | — |
| Expiry date | Oct 17, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7931
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A check valve includes an outer poppet therein having a central opening therein where the outer poppet is mounted on the internal lip within the body of a valve. The outer poppet is translatable relative to the inner lip and body and an inner poppet is mounted within the central opening of the outer poppet where the inner poppet is also translatable relative to the outer poppet and inner lip. A means for limiting the translation of the outer poppet relative to the internal lip and a means for limiting translation of the inner poppet relative to the internal lip allow the outer and inner poppet to extend between an open position and retracted position to allow improved flow area through the valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.