Vent check valve
US5213586A · kind A · utility
16Cited by
11References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 28, 1992 |
| Grant date | May 25, 1993 |
| Priority date | — |
| Expiry date | Aug 28, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/3099
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A vent check valve for use with a fluid pump such as a chemical pump wherein the vent check valve includes a floatation chamber and floatation member therein such that air is allowed to flow therethrough during normal operation of the pump while the liquid is prevented from flowing therethrough in the event of a malfunction of the pump. The vent check valve also includes a porous member thereon which allows air to flow therethrough while preventing direct access into and contamination of the vent check valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.