Patent US3800802A successfully refreshed from Google Patents.
US3800802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Short-wave therapy apparatus
Assignee: INT MEDICAL ELECTRONICS Ltd
•
Filing: 1972-01-07
•
Granted: 1974-04-02
•
Expires: 1992-01-07
Abstract
Abstract A short wave therapy apparatus has two treatment heads enabling an operator to treat two separate areas of a patient at one time or to treat two patients simultaneously. The circuit includes a crystal oscillator, a pulse modulator, an RF buffer, an RF power amplifier and a ''''pi'''' network which precedes the interconnection with the attaching cables and the treatment heads. Each one of the cables is specifically selected in length so that it will be approximately a quarter wave electrical length thereby fixed tuning each one of the heads, varied only in 1/2 wave electrical lengths. An RF sample is picked off of the output from the RF power amplifier through a capacitive divider. The RF sample is fed back through a peak rectifier to a summing point where it is compared with the voltage on a pulse amplitude reference step switch and is delivered to a pulse amplitude control circuit. Further, a pulse generator and pulse rate control circuits are connected to the pulse modulator for control purposes. Accordingly, the correct power amplitude is maintained regardless of the loading on the particular heads. An oscilloscope is connected to the capacitive divider for the purpose of monitoring the operation of the apparatus.
Inventors
- 👤 E Lipsky
- 👤 F Berry
- 👤 J Shirley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:47
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/40
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
68 words
A short wave electrotherapeutic apparatus, said apparatus comprising means for producing electrical RF energy, at least two means for inducing RF energy in at least one patient, said means being operable independently of each other and having a substantially constant impedance, means for connecting said inducing means to said RF energy producing means, and means for automatically maintaining a constant power output from said RF energy producing means.
Claim 2
Dependent Claim
68 words
A short wave electrotherapeutic apparatus, said apparatus comprising means for producing electrical RF energy, at least two means for inducing RF energy in at least one patient, said means being operable independently of each other and having a substantially constant impedance, means for connecting said inducing means to said RF energy producing means, and means for automatically maintaining a constant power output from said RF energy producing means.
Claim 3
Dependent Claim
71 words
A short wave electrotherapeutic apparatus, said apparatus comprising means for producing electrical RF energy, at least two independently operating induction treatment heads, means for connecting said heads to said RF energy producing means, and means cooperating with said connecting means being operable to assist in the balancing of said heads to thereby enable substantially equal amounts of RF energy to be induced in at least one patient from said treatment heads.
Claim 4
Dependent Claim
71 words
A short wave electrotherapeutic apparatus, said apparatus comprising means for producing electrical RF energy, at least two independently operating induction treatment heads, means for connecting said heads to said RF energy producing means, and means cooperating with said connecting means being operable to assist in the balancing of said heads to thereby enable substantially equal amounts of RF energy to be induced in at least one patient from said treatment heads.
Claim 5
Dependent Claim
141 words
A short wave electrotherapeutic apparatus having an oscillator for producing RF electrical energy, means for modulating said RF energy, a power amplifier for amplifying said RF energy and having an amplified output therefrom, and at least two independently operating induction heads connected to said amplified RF energy output for inducing said amplified RF energy in a patient for treatment purposes, the improvement comprising a reference means for determining the level of the amplified RF energy from said RF power amplifier, means for comparing said RF energy level with said reference level means, said reference means having an output indicative of a difference in said RF level and said reference level means, and means for utilizing said difference output to adjust the output of said RF power amplifier to correspond to a desired level of intensity as determined by said comparison means.
Claim 6
Dependent Claim
141 words
A short wave electrotherapeutic apparatus having an oscillator for producing RF electrical energy, means for modulating said RF energy, a power amplifier for amplifying said RF energy and having an amplified output therefrom, and at least two independently operating induction heads connected to said amplified RF energy output for inducing said amplified RF energy in a patient for treatment purposes, the improvement comprising a reference means for determining the level of the amplified RF energy from said RF power amplifier, means for comparing said RF energy level with said reference level means, said reference means having an output indicative of a difference in said RF level and said reference level means, and means for utilizing said difference output to adjust the output of said RF power amplifier to correspond to a desired level of intensity as determined by said comparison means.
Claim 7
Dependent Claim
23 words
The combination as in claim 3, including means for varying the peak intensity of said RF energy emanating from said RF power amplifier.
Claim 8
Dependent Claim
22 words
The combination as in claim 3, including means for varying the rate of said RF energy emanating from said RF power amplifier.
Claim 9
Dependent Claim
104 words
In a shortwave electrotherapeutic apparatus having an osscillator for producing RF electrical energy, means for modulating said RF energy, a power amplifier for amplifying said modulated RF electrical energy and having an amplified output therefrom, and at least two independently operating induction heads connected to said amplified RF energy output for inducing said RF energy into a patient for treatment purposes, the improvement comprising an oscilloscope monitoring means, and means interconnecting said oscilloscope monitoring means with said RF power amplifier output, said oscilloscope moniToring means thereby monitoring the energy applied to said induction head and visually displaying same to an operator of said apparatus.
Claim 10
Dependent Claim
104 words
In a shortwave electrotherapeutic apparatus having an osscillator for producing RF electrical energy, means for modulating said RF energy, a power amplifier for amplifying said modulated RF electrical energy and having an amplified output therefrom, and at least two independently operating induction heads connected to said amplified RF energy output for inducing said RF energy into a patient for treatment purposes, the improvement comprising an oscilloscope monitoring means, and means interconnecting said oscilloscope monitoring means with said RF power amplifier output, said oscilloscope moniToring means thereby monitoring the energy applied to said induction head and visually displaying same to an operator of said apparatus.
Claim 11
Dependent Claim
51 words
The combination as in claim 6, including at least two induction treatment heads, means for fix tuning said induction heads, and means cooperating with said tuning means for balancing said heads to thereby enable substantially equal amounts of RF energy to be induced in at least one patient from said heads.
References Cited (Backward Citations)
DE748190C
Cited
US2752496A
Cited
US2838672A
Cited
US2970226A
Cited
US3016556A
Cited
US3090192A
Cited
US3329148A
Cited
US3566877A
Cited
US3543762A
Cited
US3638657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |