Patent US4648398A successfully refreshed from Google Patents.
US4648398A
Expired / Lapsed
US
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Nasal cannula
Assignee: Sherwood Medical Co
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Filing: 1984-10-31
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Granted: 1987-03-10
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Expires: 2004-10-31
Abstract
Abstract A nasal cannula is provided that includes a pair of sponge-like nasal tips for insertion into the nostrils of a patient and which are easily, manually compressible to reduce the size of the tips for easy insertion and which have a relatively slow rate of expansion.
Inventors
- 👤 Ronald T. Agdanowski
- 👤 James A. Geil
- 👤 Bernard J. Tatro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:16
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/06; A61M16/0666
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A nasal cannula comprising a pair of nasal tips, a bridge connecting said tips together for respective insertion into the nostrils of a patient, each of said tips including a resilient, compressible foam seal, and gas flow passage means extending therethrough for connection with a source of gas, each of said foam seals having a rate of recovery from 60% compression thereof to 40% compression thereof in a time range between about 1 and 60 seconds, said seals having a size adapted to be manually compressed and respectively insertable into the nostrils of the patient and expandable thereafter to obturate the nostrils about said passage means, said passage means including a pair of conduits respectively extending through said seals and connectable to a source of gas, said pair of conduits respectively including a pair of gas supply tubes extending through said bridge, each of said conduits including an annular radial flange at the distal end thereof, and each of said seals is disposed between the flange of its respective conduit and said bridge.
Claim 2
Dependent Claim
173 words
A nasal cannula comprising a pair of nasal tips, a bridge connecting said tips together for respective insertion into the nostrils of a patient, each of said tips including a resilient, compressible foam seal, and gas flow passage means extending therethrough for connection with a source of gas, each of said foam seals having a rate of recovery from 60% compression thereof to 40% compression thereof in a time range between about 1 and 60 seconds, said seals having a size adapted to be manually compressed and respectively insertable into the nostrils of the patient and expandable thereafter to obturate the nostrils about said passage means, said passage means including a pair of conduits respectively extending through said seals and connectable to a source of gas, said pair of conduits respectively including a pair of gas supply tubes extending through said bridge, each of said conduits including an annular radial flange at the distal end thereof, and each of said seals is disposed between the flange of its respective conduit and said bridge.
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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) | 1990-03-09 | 1990-09-08 | 1991-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-09 | 1994-09-08 | 1995-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-09 | 1998-09-08 | 1999-03-10 | $7700.00 | Window Closed / Lapsed |