Check-valve construction
US4249567A · kind A · utility
25Cited by
9References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 2, 1979 |
| Grant date | Feb 10, 1981 |
| Priority date | — |
| Expiry date | Oct 2, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7898
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention contemplates a combined closure spring and upstop having particular application to check valves having multiple valve members. The invention is illustrated by one embodiment involving two valve members hinged on a single axis oriented diametrically of the valve-flow passage, and by another embodiment involving more than two valve members hinged on separate axes oriented tangentially of the valve-flow passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.