Liquid sensor and touch control for hydrotherapy baths
US4716605A · kind A · utility
Inventors
Key dates
| Filing date | Aug 29, 1986 |
| Grant date | Jan 5, 1988 |
| Priority date | — |
| Expiry date | Aug 29, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61H2033/007
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A hydrotherapy system is provided including a hydrotherapy tub with a water circulation pump and motor. Electrical proximity sensor terminals are mounted to the tub on the outside surface, one at a relatively low level for detecting the presence of water in the tub and a second preferably at a higher level for detecting the presence of the user to serve as an "on" and "off" switch which the user can operate by placing his hand in proximity therewith. Neither of the terminals requires physical contact to be actuated. Each is connected to circuit means for establishing the presence of an object in proximity with it and each of the terminals is operatively connected to the pump motor so that the pump motor will operate only when both of the terminals are actuated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.