Load sensor safety vacuum release system
US8281425B2 · kind B2 · utility
40Cited by
125References
10Claims
0Family size
Inventor
Key dates
| Filing date | Nov 1, 2005 |
| Grant date | Oct 9, 2012 |
| Priority date | — |
| Expiry date | Dec 10, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61H2201/0176
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A motor with associated load sensor is connected to a circulation pump of a swimming pool circulation system. The load sensor performs the function of a safety vacuum release system by detecting underload of the motor. Underload is now discovered to be reliably indicative of blockage on the intake side of a circulation pump. A switch controlled by the load sensor shuts off the motor in response to a suitable underload. Vacuum on the intake side of the circulation pump neutralizes, thereby freeing a person or object blocking the suction line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.