Flow control system and control valve having closure assistance
US10697558B2 · kind B2 · utility
1Cited by
13References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2014 |
| Grant date | Jun 30, 2020 |
| Priority date | — |
| Expiry date | Aug 4, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7922
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control valve includes a piston-housing having a hollow portion. The hollow portion has a first end, an open end, first and second internal chambers, and a fluid port configured to allow fluid to exit the second chamber. The first chamber is nearer the first end, and the second chamber is nearer the open end. A piston is located within the housing and is adapted for reciprocal motion. The piston includes a first and second seal-engaging portions. The first seal-engaging portion has a diameter that is less than the diameter of the second seal-engaging portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.