Patent US4220161A successfully refreshed from Google Patents.
US4220161A
Expired / Lapsed
US
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Perturbation device for the measurement of airway resistance
Assignee: Individual
•
Filing: 1975-04-18
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Granted: 1980-09-02
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Expires: 1995-04-18
Abstract
Abstract Instrumentation and process of measuring human airway resistance at rest or during physical activity.
Inventors
- 👤 Howard M. Berlin
- 👤 Arthur T. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:37
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/08; A61B5/085
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
116 words
An airway resistance measuring device for animals comprising: an air passage means providing air passage for an air stream from the animal to the atmosphere; a cyclic perturber means affixed to said passage means for cyclically imposing a resistance to said air stream comprising a sectored member traversing said passage means on one end thereof and said sectored member having at least one sector with a large void and at least one sector having plural small voids, and a drive means affixed to said passage means for driving said sectored member to alternately impose said sectors across said passage means; and pressure measuring means affixed to said passage means for measuring disparities caused by the resistance.
Claim 2
Dependent Claim
116 words
An airway resistance measuring device for animals comprising: an air passage means providing air passage for an air stream from the animal to the atmosphere; a cyclic perturber means affixed to said passage means for cyclically imposing a resistance to said air stream comprising a sectored member traversing said passage means on one end thereof and said sectored member having at least one sector with a large void and at least one sector having plural small voids, and a drive means affixed to said passage means for driving said sectored member to alternately impose said sectors across said passage means; and pressure measuring means affixed to said passage means for measuring disparities caused by the resistance.
Claim 3
Dependent Claim
28 words
The invention of claim 1 wherein said sectored member is a rotatable wheel and wherein said plural small voids are formed with screen means acting as said resistance.
Claim 4
Dependent Claim
13 words
The invention of claim 2 wherein said passage means includes a mouth piece.
Claim 5
Dependent Claim
14 words
The invention of claim 2 wherein said pressure measuring means includes an airflow meter.
Claim 6
Dependent Claim
20 words
The invention of claim 1 wherein the pressure measuring means is tap means for connecting a remotely located airflow means.
References Cited (Backward Citations)
GB850750A
Cited
US3036569A
Cited
DE1119459B
Cited
US3621833A
Cited
US3857385A
Cited
DE2233829A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-02 | 1984-03-03 | 1984-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-02 | 1988-03-03 | 1988-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-02 | 1992-03-03 | 1992-09-02 | $7700.00 | Window Closed / Lapsed |