Patent US2934756A successfully refreshed from Google Patents.
Patent US3756245A successfully refreshed from Google Patents.
US3756245A
Expired / Lapsed
US
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Heartbeat stimulating apparatus including means for calibrating its power supply
Assignee: American Optical Corp
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Filing: 1972-05-15
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Granted: 1973-09-04
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Expires: 1992-05-15
Abstract
Abstract Apparatus for externally calibrating an implanted energy source used for powering an electronic device implanted within a patient. The apparatus includes test circuitry and an externally operated control for engaging the test circuitry with the device. Variations in output of the device when operated in a testmode versus a normal operating mode are externally measured and are used to calibrate the energy source. A typical device which can be used with the present invention is an implantable pacer which is described in an illustrative embodiment of the invention.
Inventors
- 👤 S Thaler
- 👤 R Daynard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:38
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/362; A61N1/37; A61N1/3706; A61N1/3708
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
155 words
Implantable heart pacer apparatus for stimulating the heart of a patient, said apparatus including a DC power supply, terminal means for connection to said patient''s heart, pulse generating means connected to said supply for providing stimulation pulses on said terminal means, non-invasive means for calibrating said power supply said calibrating means comprising seriatim first means for establishing amplitudes of said stimulation pulses to be proportional to voltage of said supply, zener diode means connected to said supply for generating a precise DC voltage less than said voltage, second means responsive to operation of said zener diode means for controlling said amplitudes of said stimulation pulses to be proportional to said precise DC voltage, third means for mutually exclusively inhibiting operation of said first means and said second means, and fourth means for providing a representation of said amplitudes of said stimulation pulses in accordance with the operations of said first means and said second means.
Claim 2
Dependent Claim
155 words
Implantable heart pacer apparatus for stimulating the heart of a patient, said apparatus including a DC power supply, terminal means for connection to said patient''s heart, pulse generating means connected to said supply for providing stimulation pulses on said terminal means, non-invasive means for calibrating said power supply said calibrating means comprising seriatim first means for establishing amplitudes of said stimulation pulses to be proportional to voltage of said supply, zener diode means connected to said supply for generating a precise DC voltage less than said voltage, second means responsive to operation of said zener diode means for controlling said amplitudes of said stimulation pulses to be proportional to said precise DC voltage, third means for mutually exclusively inhibiting operation of said first means and said second means, and fourth means for providing a representation of said amplitudes of said stimulation pulses in accordance with the operations of said first means and said second means.
Claim 3
Dependent Claim
66 words
Apparatus as recited in claim 1 further comprising means for detecting heartbeats, inhibiting means responsive to operation of said detecting means detecting one of said heart-beats within a predetermined interval from the most previous one of said heartbeats for inhibiting generation of the next otherwise generated said stimulation pulse, and means for controllably disabling operation of said inhibiting means whereby said stimulation pulses are continuously provided.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |