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US3758237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for producing a pulsating flow of a fluid
Assignee: Institut National de la Santé et de la Recherche Médicale
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Filing: 1972-01-18
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Granted: 1973-09-11
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Expires: 1992-01-18
Abstract
Abstract Device for producing a pulsating flow of a fluid. The device comprises a vessel receiving the fluid and an inflatable bag within the vessel. The interior of the bag is connected to means for producing a pulsating gas flow including a gas valve controlled electrically by a pulse generator, the frequency and ratio between the work time and rest time of the generator being variable. The resulting pulsating fluid issues from the vessel by way of an outlet.
Inventors
- 👤 J Kachelhoffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:23
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/12; A; A61; A61M; A61M5/00; A61M5/14; A61M5/142; A61M5/14212; A61M5/14224; A61M5/145; A61M5/148; A61M5/1483; A61M5/1486; Y; Y10; Y10S; Y10S128/00; Y10S128/03
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
96 words
A device for irrigating an element such as a biological organ with a pulsating flow of a liquid comprising a closed vessel having an inlet, a constant-flow pump connected to said inlet and to a source of said liquid for supplying the latter into said closed vessel and for maintaining therein a substantially constant liquid level, said closed vessel further comprising an outlet connected to said element, a variable-volume pressuremodulating element immersed in said liquid contained in the vessel, and means connected to said pressuremodulating element for controlling the variations of the volume of the latter.
Claim 2
Independent Claim
96 words
A device for irrigating an element such as a biological organ with a pulsating flow of a liquid comprising a closed vessel having an inlet, a constant-flow pump connected to said inlet and to a source of said liquid for supplying the latter into said closed vessel and for maintaining therein a substantially constant liquid level, said closed vessel further comprising an outlet connected to said element, a variable-volume pressuremodulating element immersed in said liquid contained in the vessel, and means connected to said pressuremodulating element for controlling the variations of the volume of the latter.
Claim 3
Independent Claim
124 words
A device for irrigating an element such as a biological organ with a pulsating flow of a liquid comprising a closed vessel having an inlet, a constant-flow pump connected to said inlet and to a source of said liquid for supplying the latter into said closed vessel and for maintaining therein a substantially constant liquid level, said closed vessel further comprising an outlet connected to said element, a bag of an elastically yieldable material in the liquid contained in the vessel, a reservoir containing a fluid under pressure, pipe means putting the outlet of the reservoir in communication with the interior of the bag and pulsatory valve means inserted in said pipe means for producing a pulsating flow of the fluid from the reservoir.
Claim 4
Independent Claim
124 words
A device for irrigating an element such as a biological organ with a pulsating flow of a liquid comprising a closed vessel having an inlet, a constant-flow pump connected to said inlet and to a source of said liquid for supplying the latter into said closed vessel and for maintaining therein a substantially constant liquid level, said closed vessel further comprising an outlet connected to said element, a bag of an elastically yieldable material in the liquid contained in the vessel, a reservoir containing a fluid under pressure, pipe means putting the outlet of the reservoir in communication with the interior of the bag and pulsatory valve means inserted in said pipe means for producing a pulsating flow of the fluid from the reservoir.
Claim 5
Dependent Claim
47 words
A device as claimed in claim 2, wherein the valve means iS an electrically operable valve means and said device further comprises a generator of electric pulses connected to the valve means to control operation of the valve means, the mark-to-space ratio of the generator being variable.
Claim 6
Dependent Claim
85 words
A device as claimed in claim 2, wherein the valve means is a three way valve capable of defining alternatively two fluid paths, one of said paths being connected in said pipe means between said bag and said reservoir and the other paths being connected between said pipe means and atmosphere, said device further comprising a first regulating valve connected in said pipe means between said bag and said three way valve and a second regulating valve connected between said three way valve and atmosphere.
Claim 7
Dependent Claim
31 words
A device as claimed in claim 2, further comprising a tap for putting the inside of the vessel in communication with the atmosphere when the vessel is being filled with fluid.
References Cited (Backward Citations)
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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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |