Patent US4509514A successfully refreshed from Google Patents.
US4509514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial airway device
Assignee: Individual
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Filing: 1982-12-14
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Granted: 1985-04-09
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Expires: 2002-12-14
Abstract
Abstract An artificial airway device, for use in place of an endotracheal tube to facilitate lung ventilation in an unconscious patient, is in the form of a laryngeal mask comprising a tube opening into the interior of a mask portion whose periphery, which may be inflatable, is adapted to seal around the inlet to the larynx, thus securing the patient's airway, permitting spontaneous or controlled ventilation and preventing inhalation of extraneous matter.
Inventors
- 👤 Archibald I. J. Brain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:23
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/04; A61M16/0402; A61M16/0409
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
135 words
An artificial airway device to facilitate lung ventilation in an unconscious patient, comprising a curved or flexible tube and a mask portion carried at one end of the tube, the mask portion having a soft flexible annular peripheral formation which surrounds a hollow interior space or lumen of the mask, said annular peripheral formation of the mask being pre-formed with a roughly elliptical shape capable of conforming to, and fitting readily within the actual and potential space behind the larynx and to form a seal around the circumference of the laryngeal inlet without the device penetrating into the interior of the larynx, the tube opening into the lumen of the mask to provide the airway with the axis of the tube substantially aligned with the length of the roughly elliptical annular periphery of the mask.
Claim 2
Dependent Claim
135 words
An artificial airway device to facilitate lung ventilation in an unconscious patient, comprising a curved or flexible tube and a mask portion carried at one end of the tube, the mask portion having a soft flexible annular peripheral formation which surrounds a hollow interior space or lumen of the mask, said annular peripheral formation of the mask being pre-formed with a roughly elliptical shape capable of conforming to, and fitting readily within the actual and potential space behind the larynx and to form a seal around the circumference of the laryngeal inlet without the device penetrating into the interior of the larynx, the tube opening into the lumen of the mask to provide the airway with the axis of the tube substantially aligned with the length of the roughly elliptical annular periphery of the mask.
Claim 3
Dependent Claim
29 words
An artificial airway device according to claim 1, wherein the annular peripheral formation of the mask portion is inflatable to form or improve the seal around the laryngeal inlet.
Claim 4
Dependent Claim
29 words
An artificial airway device according to claim 1 wherein the mask portion is made separately from the curved or flexible tube and is secured thereto in an airtight manner.
Claim 5
Dependent Claim
35 words
An artificial airway device according to claim 3 wherein the end of the tube which opens into the interior of the mask portion is cut off at an angle to the length of the tube.
Claim 6
Dependent Claim
33 words
An artificial airway device according to claim 2 wherein the mask portion is formed of flexible rubber or plastics material with a tubular element of the same material forming its inflatable peripheral formation.
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) | 1988-04-08 | 1988-10-08 | 1989-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-08 | 1992-10-08 | 1993-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-08 | 1996-10-08 | 1997-04-09 | $7700.00 | Window Closed / Lapsed |