US4440176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digitally programmable cardiac synchronized high frequency jet ventilator control system
Assignee: Memorial Sloan Kettering Cancer Center
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Filing: 1982-08-09
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Granted: 1984-04-03
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Expires: 2002-08-09
Abstract
Abstract A delta modulator has its feedback loop components selected to put the delta modulator into slope overload in response to the QRS wave of an EKG signal for detecting the same.
Inventors
- 👤 Saul Miodownik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:57
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/0096
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
58 words
A device for detecting the QRS component of an EKG signal comprising: a delta modulator receiving the EKG signal and having a slope overload condition defined by the step size and sampling rate thereof such that it goes into the slope overload condition only in response to the QRS component of the EKG signal for detecting the same.
Claim 2
Independent Claim
58 words
A device for detecting the QRS component of an EKG signal comprising: a delta modulator receiving the EKG signal and having a slope overload condition defined by the step size and sampling rate thereof such that it goes into the slope overload condition only in response to the QRS component of the EKG signal for detecting the same.
Claim 3
Dependent Claim
26 words
A device according to claim 1, and further comprising: sensing means responsive to the slope overload condition of the delta modulator for producing an output pulse.
Claim 4
Dependent Claim
19 words
The device according to claim 2, wherein the sensing means comprises a programmable counter presettable to a desired count.
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) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |