US2711728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blood pressure measuring device
Assignee: Wyeth Holdings LLC
•
Filing: 1951-08-24
•
Granted: 1955-06-28
•
Expires: 1971-08-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Edwin M Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:18
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/022; A61B5/0225; A61B5/02255; A61B5/024; A61B5/02416
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
AN APPARATUS FOR MEASURING BLOOD PRESSURE COMPRISING IN COMBINATION A MANOMETER HAVING A PLURALITY OF SPACED ELECTRICAL CONTACTS THEREON, A STEPPING RELAY INCLUDING A SWITCH ARM ASSOCIATED WITH SAID MANOMETER, A PLURALITY OF ELECTRICAL CONTACTS ON SAID STEPPING RELAY CONNECTED TO SAID CONTACTS ON SAID MANOMETER, A CHRONOGRAPH RECORDER CONNECTED TO SAID STEPPING RELAY, A MANOMETRIC CUFF PNEUMATICALLY CONNECTED TO SAID MANOMETER, A HOLDER FOR A PORTION OF A TEST SUBJECT, THE CIRCULATION OF WHICH IS AFFECTED BY THE PRESSURE TO SAID CUFF, A LIGHT SOURCE, A PHOTOELECTRIC SYSTEM RESPONSIVE TO LIGHT FROM SAID SOURCE, THE HOLDER BEING LOCATED BETWEEN THE LIGHT SOURCE AND THE PHOTOELECTRIC SYSTEM, A VACUUM TUBE AMPLIFIER CONNECTED TO SAID PHOTOELECTRIC SYSTEM FOR AMPLIFYING THE ELECTRICAL SIGNAL FROM SAID PHOTOELECTRIC SYSTEM, A RECORDER MILLIMETER CONNECTED TO SAID AMPLIFIER, AND MEANS TO ADJUSTABLY VARY THE PRESSURE IN SAID MANOMETRIC CUFF WHEREBY CHANGES IN OPTICAL DENSITY AND MANOMETER PRESSURE ARE SIMULTANEOUSLY PRESSURE AT WHICH THE SAME CHART SO THAT THE PNEUMATIC PRESSURE AT WHICH THE OPTICAL DENSITY CHANGES ABRUPTLY MAY BE DETERMINED.
Claim 2
Independent Claim
174 words
AN APPARATUS FOR MEASURING BLOOD PRESSURE COMPRISING IN COMBINATION A MANOMETER HAVING A PLURALITY OF SPACED ELECTRICAL CONTACTS THEREON, A STEPPING RELAY INCLUDING A SWITCH ARM ASSOCIATED WITH SAID MANOMETER, A PLURALITY OF ELECTRICAL CONTACTS ON SAID STEPPING RELAY CONNECTED TO SAID CONTACTS ON SAID MANOMETER, A CHRONOGRAPH RECORDER CONNECTED TO SAID STEPPING RELAY, A MANOMETRIC CUFF PNEUMATICALLY CONNECTED TO SAID MANOMETER, A HOLDER FOR A PORTION OF A TEST SUBJECT, THE CIRCULATION OF WHICH IS AFFECTED BY THE PRESSURE TO SAID CUFF, A LIGHT SOURCE, A PHOTOELECTRIC SYSTEM RESPONSIVE TO LIGHT FROM SAID SOURCE, THE HOLDER BEING LOCATED BETWEEN THE LIGHT SOURCE AND THE PHOTOELECTRIC SYSTEM, A VACUUM TUBE AMPLIFIER CONNECTED TO SAID PHOTOELECTRIC SYSTEM FOR AMPLIFYING THE ELECTRICAL SIGNAL FROM SAID PHOTOELECTRIC SYSTEM, A RECORDER MILLIMETER CONNECTED TO SAID AMPLIFIER, AND MEANS TO ADJUSTABLY VARY THE PRESSURE IN SAID MANOMETRIC CUFF WHEREBY CHANGES IN OPTICAL DENSITY AND MANOMETER PRESSURE ARE SIMULTANEOUSLY PRESSURE AT WHICH THE SAME CHART SO THAT THE PNEUMATIC PRESSURE AT WHICH THE OPTICAL DENSITY CHANGES ABRUPTLY MAY BE DETERMINED.
References Cited (Backward Citations)
US2123573A
Cited
US2352875A
Cited
US2173164A
Cited
US2493301A
Cited
GB622934A
Cited
US2571124A
Cited
US2540163A
Cited
US2506384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-27 | 1958-12-27 | 1959-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-27 | 1962-12-27 | 1963-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-27 | 1966-12-27 | 1967-06-28 | $7700.00 | Window Closed / Lapsed |