US4174712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for use with medicinal inhalation devices
Assignee: Draco AB
•
Filing: 1977-11-07
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Granted: 1979-11-20
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Expires: 1997-11-07
Abstract
Abstract A device for use with a medicinal inhalation device comprises a rotationally symmetrical chamber having an opening to be connected to a spray nozzle and a mouthpiece. The chamber diverges conically from the opening and converges towards the mouthpiece. During passage through the chamber, an aerosol mist will lose propellant by evaporation, and smaller particles will be generated which can more readily follow the path of inhalation.
Inventors
- 👤 Nils F. E. Moren
- 👤 Kjell I. L. Wetterlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:24
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/28; B65D83/30; A; A61; A61M; A61M15/00; A61M15/0001; A61M15/0013; A61M15/0016; A61M15/0018; A61M15/0086; A61M15/0088; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
177 words
A device for use with a medicinal inhalation device for generating and enclosing a delimited aerosol mist, the device comprising a chamber which is rotationally symmetrical about an axis and has opposed ends, an opening at one said end to be connected with a spray nozzle, and a mouthpiece at the other said end, said opening and mouthpiece having axes aligned with said axis, the chamber having a first part adjacent the opening and a second part adjacent the mouthpiece, said first part being conical and divergent away from the opening, said second part converging towards the mouthpiece, orifices being provided in said first part only, said orifices comprising 1-50% of the total surface area of the chamber, the total internal volume of the chamber being between 0.5 and 2.0 liters, the total length of the chamber being between 10 and 40 cm, the maximum diameter of the chamber being between 25 and 80% of its length, and the part of the chamber which has the maximum diameter being closer to the mouthpiece than to the opening.
Claim 2
Independent Claim
177 words
A device for use with a medicinal inhalation device for generating and enclosing a delimited aerosol mist, the device comprising a chamber which is rotationally symmetrical about an axis and has opposed ends, an opening at one said end to be connected with a spray nozzle, and a mouthpiece at the other said end, said opening and mouthpiece having axes aligned with said axis, the chamber having a first part adjacent the opening and a second part adjacent the mouthpiece, said first part being conical and divergent away from the opening, said second part converging towards the mouthpiece, orifices being provided in said first part only, said orifices comprising 1-50% of the total surface area of the chamber, the total internal volume of the chamber being between 0.5 and 2.0 liters, the total length of the chamber being between 10 and 40 cm, the maximum diameter of the chamber being between 25 and 80% of its length, and the part of the chamber which has the maximum diameter being closer to the mouthpiece than to the opening.
Claim 3
Dependent Claim
16 words
A device as claimed in claim 1 wherein said second part of the chamber is conical.
Claim 4
Dependent Claim
23 words
A device as claimed in claim 1 wherein said orifices comprise between 10 and 50% of the total surface area of the chamber.
Claim 5
Dependent Claim
26 words
A device as claimed in claim 1 including, in said mouthpiece, a valve mechanism allowing exhalation through the mouthpiece without exhaled air passing through the chamber.
References Cited (Backward Citations)
US673021A
Cited
US1854726A
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US3001524A
Cited
US2906463A
Cited
US3522806A
Cited
US3897779A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-19 | 1983-05-21 | 1983-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-19 | 1987-05-21 | 1987-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-19 | 1991-05-21 | 1991-11-20 | $7700.00 | Window Closed / Lapsed |