Patent US3889660A successfully refreshed from Google Patents.
US3889660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spirometer
Assignee: Searle Cardio Pulmonary Systems Inc
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Filing: 1973-10-04
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Granted: 1975-06-17
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Expires: 1993-10-04
Abstract
Abstract A spirometer has a cabinet-like frame adapted to receive a deformable bag having one wall disposed against an abutting frame surface. A primary plate is hinged at its top on the frame to rest by gravity against an opposite wall of the bag. A valved inlet opening into the bag admits air to enlarge the bag. Movement of the enlarging bag swings the primary plate and moves an electrical transducer actuating an electrical meter and an electric light. An outlet valve moved by a solenoid controls air flow out of the bag. A secondary plate is hinged at its top to the frame to swing against and with the primary plate. An electric motor moves the secondary plate from a parked position against the primary plate to expel air from the bag. The outlet valve solenoid is timed to open the outlet valve accordingly. The motor moves the secondary plate away from the primary plate and back to the parked position, the outlet valve solenoid being simultaneously energized and the outlet valve closed.
Inventors
- 👤 Sotiris Kitrilakis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:27
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/08; A61B5/091; A61B5/093
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
135 words
In a spirometer, having a frame having an abutting surface adapted to receive an air bag thereagainst; a primary plate; means for supporting said primary plate on said frame for swinging movement about a superior, horizontal axis parallel to said surface and so positioned that said primary plate is gravity urged to a position adjacent said abutting surface; the improvement comprising: means for indicating the position of said primary plate relative to said frame; a secondary plate; means supporting said secondary plate on said frame for swinging movement about substantially the same superior, horizontal axis; and means on said frame for holding said secondary plate away from said primary plate and for swinging said secondary plate against said primary plate and forcibly swinging said primary and secondary plates as a unit toward said abutting surface.
Claim 2
Dependent Claim
135 words
In a spirometer, having a frame having an abutting surface adapted to receive an air bag thereagainst; a primary plate; means for supporting said primary plate on said frame for swinging movement about a superior, horizontal axis parallel to said surface and so positioned that said primary plate is gravity urged to a position adjacent said abutting surface; the improvement comprising: means for indicating the position of said primary plate relative to said frame; a secondary plate; means supporting said secondary plate on said frame for swinging movement about substantially the same superior, horizontal axis; and means on said frame for holding said secondary plate away from said primary plate and for swinging said secondary plate against said primary plate and forcibly swinging said primary and secondary plates as a unit toward said abutting surface.
Claim 3
Dependent Claim
67 words
A device as in claim 1 in which a deformable bag is between said abutting surface and said primary plate and has a portion depending below said primary plate provided with an air outlet, a valve plate, and means for mounting said valve plate on said frame for movement between a first position clamping said portion against said frame and a second Position free of said portion.
Claim 4
Dependent Claim
14 words
A device as in claim 2 including electrical means for moving said valve plate.
Claim 5
Dependent Claim
23 words
A device as in claim 3 including means for engaging said moving means in time with operation of said holding and swinging means.
Claim 6
Dependent Claim
17 words
A device as in claim 1 in which said holding and swinging means includes an electric motor.
Claim 7
Dependent Claim
30 words
A device as in claim 5 in which said holding and swinging means includes a rotor driven by said motor, and a pitman connecting said rotor and said secondary plate.
Claim 8
Dependent Claim
102 words
In a spirometer, having a frame establishing a stationary surface adapted to receive an air bag thereagainst, a primary plate, means mounting said primary plate on said frame for free swinging movement toward and from said stationary surface in a predetermined path, the improvement comprising: means for indicating the position of the primary plate relative to said frame; a secondary plate, means mounting said secondary plate on said frame for swinging movement relative to said stationary surface in said predetermined path, and means for swinging said secondary plate in said predetermined path and into and away from abutment with said primary plate.
Claim 9
Dependent Claim
102 words
In a spirometer, having a frame establishing a stationary surface adapted to receive an air bag thereagainst, a primary plate, means mounting said primary plate on said frame for free swinging movement toward and from said stationary surface in a predetermined path, the improvement comprising: means for indicating the position of the primary plate relative to said frame; a secondary plate, means mounting said secondary plate on said frame for swinging movement relative to said stationary surface in said predetermined path, and means for swinging said secondary plate in said predetermined path and into and away from abutment with said primary plate.
Claim 10
Dependent Claim
23 words
A spirometer as in claim 7 including a deformable bag disposed between and in contact with said stationary surface and said primary plate.
Claim 11
Dependent Claim
20 words
A spirometer as in claim 8 including an air inlet to said bag and an air outlet from said bag.
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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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |