Whirlpool bath with an inverter-controlled circulating pump
US5457826A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1993 |
| Grant date | Oct 17, 1995 |
| Priority date | — |
| Expiry date | Dec 6, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61H2201/5007
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A whirlpool bath with an inverter-controlled circulating pump comprises a bathtub body, a circulating pump driven by a power-operated motor, a hot water circulation path disposed between the bathtub body and the circulating pump, the hot water circulation path comprising a hot water suction path and a hot water forced-feed path, the hot water forced-feed path having at least one terminal end which communicates with the interior of the bathtub body, at least one blow-off nozzle which is mounted on the terminal end of the hot water forced-feed path, an air intake portion connected to the hot water forced-feed path to permit blowing of bubbling hot water into the bathtub body from the blow-off nozzles, an inverter interposed between a drive circuit of the power-operated motor of the circulating pump and a power source and an electrical insulation means protecting the transfer of high frequency components of inverter-produced current to the hot water in the bathtub body. Due to such construction, the circulating pump can be controlled such that the revolution of the motor is readily and smoothly varied by way of a frequency modulation influenced by the inverter to provide the blow-off …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.