Portable vibrating units having different speeds
US6217533A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 18, 1998 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Nov 18, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61H2201/5007
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A bed massager includes two vibrating units and a control unit. Each vibrating unit has two motors oriented at 90.degree. relative to each other. The motors in each power unit preferably have different power ratings, and can operate at different speeds. One motor in each unit is controlled to necessarily operate at a different speed than a corresponding motor in the other unit in at least one mode of operation, to avoid monotonous vibration and ensure that a pulse/wave effect is achieved. The other motors can be operated over a continuous range of speeds. The control unit provides individual control of the two vibrating units. In addition, the other motors in each vibrating unit can be separately and variably controlled. The vibrating units can easily be placed between a box spring and an upper mattress of a bed, horizontally separated at some distance. The device can also be used with a chair, a pillow or the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.