Patent US4071033A successfully refreshed from Google Patents.
US4071033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrotherapeutic device with modulated dual signals
Assignee: Individual
•
Filing: 1976-12-20
•
Granted: 1978-01-31
•
Expires: 1996-12-20
Abstract
Abstract Stimuli are initiated by a master oscillator, whose output is split and applied to two frequency dividers which divide the frequency by different numbers. The two frequencies thus derived are applied to waveshapers to provide a desired waveform such as a half sinewave, and also each signal is further divided by a common number. The two signals are then amplified, and applied to the body through a probe whose contacts are arranged so that the two stimuli currents are orthogonal to each other. The two high frequency signals hetrodyne within the human muscle to produce a single low frequency stimuli, useful for the production of muscle contraction, hyperemia, electroanalgesia and muscle relaxation.
Inventors
- 👤 Edward P. Nawracaj
- 👤 Henry A. Greit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:43
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/36014; A61N1/36021; A61N1/323
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
165 words
An electrotherapeutic device for applying thereapeutic electrical currents to the body of a patient comprising: oscillator means for producing first electric signals of a predetermined first frequency; first and second divider means connected to receive said first electrical signals and to divide the frequency thereof by first and second numbers respectively to produce second and third signals respectively; first and second waveshaping means connected respectively to receive said second and third signals and to shape the envelopes for these signals in a corresponding predetermined manner to produce respectively fourth and fifth signals; first and second power amplifier means connected respectively to amplify said fourth and fifth signals; amplitude control means associated with said first and second power amplifier means to control the output voltage level of the outputs of said first and second power amplifier means; applicator means for receiving said amplified fourth and fifth signals from the first and second power amplifier means respectively and applying these signals to the body of the patient.
Claim 2
Dependent Claim
165 words
An electrotherapeutic device for applying thereapeutic electrical currents to the body of a patient comprising: oscillator means for producing first electric signals of a predetermined first frequency; first and second divider means connected to receive said first electrical signals and to divide the frequency thereof by first and second numbers respectively to produce second and third signals respectively; first and second waveshaping means connected respectively to receive said second and third signals and to shape the envelopes for these signals in a corresponding predetermined manner to produce respectively fourth and fifth signals; first and second power amplifier means connected respectively to amplify said fourth and fifth signals; amplitude control means associated with said first and second power amplifier means to control the output voltage level of the outputs of said first and second power amplifier means; applicator means for receiving said amplified fourth and fifth signals from the first and second power amplifier means respectively and applying these signals to the body of the patient.
Claim 3
Dependent Claim
43 words
An electrotherapeutic device as claimed in claim 1, wherein said first and second waveshaping means each include further divider means to divide the frequency of said second and third signals by the same third number in producing said fourth and fifth signals respectively.
Claim 4
Dependent Claim
40 words
An electrotherapeutic device as claimed in claim 1, wherein said amplitude control means comprises two variable resistors, connected respectively between the outputs of said power amplifier means and said application means, the resistors being ganged to a common mechanical control.
Claim 5
Dependent Claim
22 words
An electrotherapeutic device as claimed in claim 1, further including a remote program and control means coupled to control said oscillator means.
Claim 6
Dependent Claim
43 words
An electrotherapeutic device as claimed in claim 1, wherein said first and second wave shaping means provide modulation of said fourth and fifth signals in the form of monophasic semi-sine wave such a produced by a full wave rectifier from a full sinewave.
Claim 7
Dependent Claim
31 words
An electrotherapeutic device as claimed in claim 1, further including meter means to indicate the true root mean square value of the outputs to said probe means, with any stimulus waveform.
References Cited (Backward Citations)
US2622601A
Cited
GB888580A
Cited
US3096768A
Cited
US3774620A
Cited
US3835833A
Cited
US3958577A
Cited
DE2159437B1
Cited
US3794022A
Cited
US3918461A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-30 | 1981-08-01 | 1982-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-30 | 1985-08-01 | 1986-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-30 | 1989-08-01 | 1990-01-31 | $7700.00 | Window Closed / Lapsed |