Patent US3218979A successfully refreshed from Google Patents.
US3218979A
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Hydraulic blood pump
Assignee: Individual
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Filing: 1964-04-28
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Granted: 1965-11-23
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Expires: 1984-04-28
Abstract
No abstract record available.
Inventors
- 👤 Alan W Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:17
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/1037; F04B53/1047; F04B53/1057; A; A61; A61M; A61M60/00; A61M60/10; A61M60/104; A61M60/109; A61M60/113; A61M60/30; A61M60/36; A61M60/38; A61M60/40; A61M60/424; A61M60/427; A61M60/50; A61M60/508; A61M60/562; A61M60/80; A61M60/835; A61M60/837; A61M60/855; A61M60/89; F04B43/00; F04B43/08; F04B43/10; F04B43/107; F04B49/00; F04B49/12; A61M60/892; A61M60/894; A61M60/896; Y; Y10; Y10S; Y10S128/00; Y10S128/03; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T137/7882
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
A HYDRAULIC BLOOD PUMP COMPRISING: A SEALED CYLINDER FILLED WITH HYDRAULIC FLUID AND PROVIDED WITH A DETACHABLE LID, A COMPRESSIBLE RUBBER BULB SECURED WITHIN SAID SEALED CYLINDER AND PROVIDED WITH VALVED INLET AND OUTLET CONNECTIONS, AN INLET VALVE AND AN OUTLET VALVE IN SAID VALVED INLET AND OUTLET CONNECTIONS, EACH OF SAID VALVES COMPRISE A TUBULAR SECTION HAVING A THIN TAPERING END, SAID END HAVING LATERAL SLITS THEREIN FORMING A YIELDABLE CLOSURE, A FLEXIBLE DIAPHRAGM FORMING A SEALED CLOSURE WITH THE BOTTOM OF SAID CYLINDER, A RAISED PLATFORM FOR SUPPORTING SAID CYLINDER, AN OPENING IN SAID PLATFORM SUBSTANTIALLY THE AREA OF SAID DIAPHRAGM, A ROD EXTENDING DOWNWARD FROM SAID DIAPHRAGM, A ROCKER ARM PIVOTALLY CONNECTED WITH SAID ROD, SAID ARM BEING PIVOTALLY MOUNTED ON AN ADJUSTABLE SUPPORT TO PROVIDE A PRESSURE STROKE TO SAID DIAPHRAGM, SAID SUPPORT BEING MOUNTED ON A MOVABLE BAR FOR ADJUSTING THE PIVOT POINT OF SAID ROCKER ARM AND CONSEQUENTLY THE PRESSURE STROKE OF SAID DIAPHRAGM, AND DRIVING MEANS CONNECTED TO SAID ARM TO PRODUCE A ROCKING MOTION IN THE SAME THEREBY VARYING THE VERTICAL MOVEMENT OF SAID ROD.
Claim 2
Dependent Claim
183 words
A HYDRAULIC BLOOD PUMP COMPRISING: A SEALED CYLINDER FILLED WITH HYDRAULIC FLUID AND PROVIDED WITH A DETACHABLE LID, A COMPRESSIBLE RUBBER BULB SECURED WITHIN SAID SEALED CYLINDER AND PROVIDED WITH VALVED INLET AND OUTLET CONNECTIONS, AN INLET VALVE AND AN OUTLET VALVE IN SAID VALVED INLET AND OUTLET CONNECTIONS, EACH OF SAID VALVES COMPRISE A TUBULAR SECTION HAVING A THIN TAPERING END, SAID END HAVING LATERAL SLITS THEREIN FORMING A YIELDABLE CLOSURE, A FLEXIBLE DIAPHRAGM FORMING A SEALED CLOSURE WITH THE BOTTOM OF SAID CYLINDER, A RAISED PLATFORM FOR SUPPORTING SAID CYLINDER, AN OPENING IN SAID PLATFORM SUBSTANTIALLY THE AREA OF SAID DIAPHRAGM, A ROD EXTENDING DOWNWARD FROM SAID DIAPHRAGM, A ROCKER ARM PIVOTALLY CONNECTED WITH SAID ROD, SAID ARM BEING PIVOTALLY MOUNTED ON AN ADJUSTABLE SUPPORT TO PROVIDE A PRESSURE STROKE TO SAID DIAPHRAGM, SAID SUPPORT BEING MOUNTED ON A MOVABLE BAR FOR ADJUSTING THE PIVOT POINT OF SAID ROCKER ARM AND CONSEQUENTLY THE PRESSURE STROKE OF SAID DIAPHRAGM, AND DRIVING MEANS CONNECTED TO SAID ARM TO PRODUCE A ROCKING MOTION IN THE SAME THEREBY VARYING THE VERTICAL MOVEMENT OF SAID ROD.
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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |