Check valves
US10724647B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2018 |
| Grant date | Jul 28, 2020 |
| Priority date | — |
| Expiry date | Apr 12, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/167
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A check valve includes an upper housing having an inlet of the check valve, a lower housing axially coupled to the upper housing and having an outlet of the check valve, a valve portion cooperatively formed by the upper and lower housings, a passageway extending between the inlet and outlet, a first filter included in the upper housing to limit passage of undesirable matter in fluid flowing through the check valve, a second filter included in the lower housing to limit passage of undesirable matter in fluid flowing through the check valve, each of the first filter and the second filter including a plurality of vertical structures disposed in the valve portion and extending axially and radially in the valve portion, and a valve member positioned in the valve portion to selectively permit fluid to flow through the check valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.