Spa safety drain
US4115878A · kind A · utility
79Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1977 |
| Grant date | Sep 26, 1978 |
| Priority date | — |
| Expiry date | Mar 14, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61H2201/0176
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A safety drain for a spa having a recirculating water pump is arranged to prevent entrapment, against the drain, of an object or person that may inadvertently block flow of water through the drain. The drain body, having a first fitting connected to the suction line of the pump, is provided with a second fitting connected to a vent conduit that has an end open to atmosphere at a point above water level. A by-pass conduit interconnecting the pump suction line and the vent conduit avoids disablement of the safety function of the vent conduit if the latter should become blocked within the drain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.