Vacuum release valve and method
US6687923B2 · kind B2 · utility
62Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2002 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Feb 22, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7897
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A vacuum release valve and method are defined. The valve 10, 100, 200 is positioned on a line L between a pool suction inlet I and a pump PU for pumping pool liquid from the inlet and along the line L. The valve 10, 100, 200 includes a valve member 24, 108, 214 that is urged by the pump into a sealing position during normal pumping of pool liquid from the inlet to the pump, so that pool liquid does not flow across the valve. When a predetermined level of vacuum is induced in the line, the valve member is moved out of the sealing position by the vacuum so that a fluid is allowed to flow through the valve to release the vacuum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.