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US3870072A
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Insufflation apparatus for introducing limited quantities of carbon dioxide into the human body for operative purposes
Assignee: LINDEMANN HANS#JOACHIM
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Filing: 1973-06-29
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Granted: 1975-03-11
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Expires: 1993-06-29
Abstract
Abstract The insufflation apparatus serves for introducing limited quantities of carbon dioxide into the human body for operative purposes and consists of a CO2 container disposed in a housing and comprising a manometer and a shut-off valve and of an optical and/or acoustic signal device which is connected to a flow meter via a control device comprising a measured value comparator and a time switch, and the shut-off valve of the flow meter is connected to a device which reopens the closed shut-off valve after passage of a variable regeneration time and is controllable via the time switch.
Inventors
- 👤 Hans-Joachim Lindemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:35
CPC Classifications
A; A61; A61M; A61M13/00; A61M13/003; A61M2202/00; A61M2202/02; A61M2202/0225; A61M2205/00; A61M2205/33; A61M2205/3331; A61M2205/3344; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8326
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
Insufflation apparatus for introducing limited quantities of carbon dioxide to the human body for surgical purposes comprising, in combination, a housing, a replaceable carbon dioxide container (11), a manometer and a shut-off valve (19) for said container, said shut-off valve (19) being operable between an open and a closed position, flow measuring means (15) comprising measured value pickup means (151) consisting of PTC conductor feelers, said measured value pickup means (151) being constructed as a cold conductor, a warning signal generating device (192), a control device (191) including a measured value comparator (152) and a time switch (193) connecting said signal generating device (192) to said flow meter (15), drive motor means, and means connecting said shut-off valve (19) to said flow measuring means (15) and to said drive motor means, said drive motor means being operable to reopen said shut-off valve (19) after closure thereof upon passage of a variable regeneration time under control of said time switch (193).
Claim 2
Dependent Claim
160 words
Insufflation apparatus for introducing limited quantities of carbon dioxide to the human body for surgical purposes comprising, in combination, a housing, a replaceable carbon dioxide container (11), a manometer and a shut-off valve (19) for said container, said shut-off valve (19) being operable between an open and a closed position, flow measuring means (15) comprising measured value pickup means (151) consisting of PTC conductor feelers, said measured value pickup means (151) being constructed as a cold conductor, a warning signal generating device (192), a control device (191) including a measured value comparator (152) and a time switch (193) connecting said signal generating device (192) to said flow meter (15), drive motor means, and means connecting said shut-off valve (19) to said flow measuring means (15) and to said drive motor means, said drive motor means being operable to reopen said shut-off valve (19) after closure thereof upon passage of a variable regeneration time under control of said time switch (193).
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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |