Two-way check valve
US6298873A · kind A · utility
18Cited by
16References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2000 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Jan 31, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7838
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The check valve has rotationally symmetric outer boundaries with a transverse plate separating a first portion which is intended to be within a first air space and a second portion which is intended to be within a second air space. Two internal passageways are formed within the interior of the check valve, each with an opening in the first portion and another opening in the second portion. The first and second portions each include a circular channel with flared walls into which one of the openings is formed. Each circular channel includes an O-ring which serves as a valve to control flow into the respective internal passageway.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.