Transcutaneous pain control and/or muscle stimulating apparatus
US4147171A · kind A · utility
Inventors
Key dates
| Filing date | Jan 28, 1977 |
| Grant date | Apr 3, 1979 |
| Priority date | — |
| Expiry date | Jan 28, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/36021
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus for generating electrical pulses which are suitable for application to selected areas of the user's body for pain control or muscle stimulation. The current level, pulse width, pulse rate, voltage level and pulse configuration are all controlled to produce the desired effects. The apparatus includes a timing circuit which emits pulses of selected width and repetition rate. The pulses from the timing circuit energize a switching circuit which selectively connects the primary of a pulse transformer to a power source. The transformer is so constructed and arranged that it operates near saturation, thereby effectively operating as a current limiter, which helps to prevent spikes in the electrical pulse output of the apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.