US3894535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blood pressure monitor system with pushbutton zero-offset compensation
Assignee: Warner Lambert Co LLC
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Filing: 1974-02-01
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Granted: 1975-07-15
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Expires: 1994-02-01
Abstract
Abstract A blood pressure monitor system with pushbutton zero-offset compensation. There is disclosed a blood pressure monitor system for monitoring blood pressure of a patient. The system includes a manual control which when operated, automatically provides a feedback signal to compensate for zero-offset of the pressure transducer when zero pressure is applied to the transducer. Zerooffset compensation is thus rapidly and easily obtained, and the signal is maintained thereafter for a long period of time. The present invention thus greatly facilitates monitoring blood pressure of a patient.
Inventors
- 👤 Robert L Cannon
- 👤 Robert A Mceachern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:09
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/0215
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A blood pressure monitor system for monitoring blood pressure of a patient said system comprising: transducer means adapted to be operatively connected to said patient for sensing said pressure and for converting said pressure into an analogous electrical signal; amplifying means; means for extending said electrical signal to input terminals of said amplifying means; indicator means responsive to output of said amplifying means for displaying value of said pressure; means for disconnecting said transducer means from said patient thereby applying zero pressure to said transducer; a manual control; feedback means including said manual control; means responsive to operation of said manual control for simultaneously increasing gain of said amplifying means, generating a transducer-compensating zero-pressure-offset signal during operation of said disconnecting means, and extending said offset signal to said input terminals of said amplifying means to cause said indicator means to display zero pressure; and means for maintaIning said offset signal for an extended period of time after release of said manual control and after termination of operation of said disconnecting means.
Claim 2
Dependent Claim
171 words
A blood pressure monitor system for monitoring blood pressure of a patient said system comprising: transducer means adapted to be operatively connected to said patient for sensing said pressure and for converting said pressure into an analogous electrical signal; amplifying means; means for extending said electrical signal to input terminals of said amplifying means; indicator means responsive to output of said amplifying means for displaying value of said pressure; means for disconnecting said transducer means from said patient thereby applying zero pressure to said transducer; a manual control; feedback means including said manual control; means responsive to operation of said manual control for simultaneously increasing gain of said amplifying means, generating a transducer-compensating zero-pressure-offset signal during operation of said disconnecting means, and extending said offset signal to said input terminals of said amplifying means to cause said indicator means to display zero pressure; and means for maintaIning said offset signal for an extended period of time after release of said manual control and after termination of operation of said disconnecting means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |