Patent US3552393A successfully refreshed from Google Patents.
US3552393A
Expired / Lapsed
US
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Transfusion device
Assignee: Medizintechnik Leipzig VEB
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Filing: 1969-07-31
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Granted: 1971-01-05
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Expires: 1989-07-31
Abstract
Abstract A blood transfusion device for infusion of blood into a human body and for simultaneous removal of blood therefrom is equipped with two pair of pumps and respective valves arranged in two distinct units whereby, while one unit is removing the blood from the body through a distinct removing conduit, the other is supplying the blood through a distinct infusion conduit, the arrangement being such that a direct connection is made between the body and the receiving vessel through the removing conduit and another direct connection is made between the container holding the infusion fluid and the body through the infusion conduit.
Inventors
- 👤 Werner Willgerodt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:48
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/71; A61M1/77; A61M1/772; A61M1/02; A61M1/60; A61M1/63; A61M1/64; A61M1/67
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
335 words
Apparatus for infusing a fluid into a human body while simultaneously removing a waste fluid therefrom, said apparatus comprising a distinct infusion section including a container for said fluid to be infused, first pump means comprising a pair of pumps cooperating in such a way that one of said pair is operating in the suction cycle thereof while the other of said pair is operating in the compression cycle thereof, thereby causing a continuous flow of the pumped fluid, conduit means for connecting said container dIrectly to said first pump means and therefrom directly to the body, first means disposed in said conduit means for isolating the body from each respective one of said pair of pumps during the suction cycle thereof, second means disposed in said conduit means for isolating said container from each respective one of said pair of pumps during said compression cycle thereof, a distinct waste-fluid-removing section including a container for said waste fluid, second pump means comprising a pair of pumps cooperating in such a way that one of said pair is operating in the suction cycle thereof while the other of said pair is operating in the compression cycle thereof thereby causing a continuous flow of the pumped fluid, further conduit means for connecting said waste fluid container directly to said second pump means and therefrom directly to the body, third means disposed in said further conduit means for isolating the body from each respective one of said pair of pumps during the compression cycle thereof, fourth means disposed in said further conduit means for isolating the waste fluid container from each one of said pair of pumps during the suction cycle thereof, said pump means and said isolating means in said infusion section cooperating with said pump means and said isolating means in said waste-fluid-removing section to permit a continuous flow of fluid into said human body and simultaneously a continuous withdrawal of waste fluid therefrom, and drive means for driving said first and said second pump means.
Claim 2
Dependent Claim
335 words
Apparatus for infusing a fluid into a human body while simultaneously removing a waste fluid therefrom, said apparatus comprising a distinct infusion section including a container for said fluid to be infused, first pump means comprising a pair of pumps cooperating in such a way that one of said pair is operating in the suction cycle thereof while the other of said pair is operating in the compression cycle thereof, thereby causing a continuous flow of the pumped fluid, conduit means for connecting said container dIrectly to said first pump means and therefrom directly to the body, first means disposed in said conduit means for isolating the body from each respective one of said pair of pumps during the suction cycle thereof, second means disposed in said conduit means for isolating said container from each respective one of said pair of pumps during said compression cycle thereof, a distinct waste-fluid-removing section including a container for said waste fluid, second pump means comprising a pair of pumps cooperating in such a way that one of said pair is operating in the suction cycle thereof while the other of said pair is operating in the compression cycle thereof thereby causing a continuous flow of the pumped fluid, further conduit means for connecting said waste fluid container directly to said second pump means and therefrom directly to the body, third means disposed in said further conduit means for isolating the body from each respective one of said pair of pumps during the compression cycle thereof, fourth means disposed in said further conduit means for isolating the waste fluid container from each one of said pair of pumps during the suction cycle thereof, said pump means and said isolating means in said infusion section cooperating with said pump means and said isolating means in said waste-fluid-removing section to permit a continuous flow of fluid into said human body and simultaneously a continuous withdrawal of waste fluid therefrom, and drive means for driving said first and said second pump means.
Claim 3
Dependent Claim
30 words
Apparatus as claimed in claim 1, wherein said pumps are operable each with a piston, and also comprising coupling means coupling said drive means to respective pairs of said pumps.
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |