Patent US3602219A successfully refreshed from Google Patents.
US3602219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Respirator having sound diaphragm protective cavity
Assignee: Draegerwerk AG and Co KGaA
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Filing: 1969-03-05
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Granted: 1971-08-31
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Expires: 1989-03-05
Abstract
Abstract A respirator or gas mask includes an inlet with an inlet check valve permitting flow of inhalation air in the mask body past a front viewing window. An inner auxiliary mask is formed within the mask body in a central area of a size accommodating the nose and the mouth of the wearer. The inner mask is provided with a vibration diaphragm or speaking membrane which permits the transmission of the sound of the speech of the wearer to the outside. The membrane is located over an external cavity which is formed directly adjacent the inlet of the mask. An outlet valve is arranged to receive exhalation air from the auxiliary mask cavity inside the mask and to discharge it in the vicinity of the antechamber or cavity adjacent the speaking membrane and the inlet passage.
Inventors
- 👤 Ernst Warncke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:00
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
115 words
A respirator mask, comprising a mask body, means defining an inhalation passage through said mask body, said body having wall means defining an interior body wall and an exterior wall spaced from said interior body wall and defining therewith an exterior protective antechamber on said body having an exterior discharge opening, a speaking membrane mounted on said interior body wall and communicating with the interior of said mask body on its one side and with said protective antechamber on the opposite side thereof, and an exhalation valve mounted on said interior body wall and communicating on its one side with the interior of said mask body and on its opposite side with said protective antechamber.
Claim 2
Dependent Claim
115 words
A respirator mask, comprising a mask body, means defining an inhalation passage through said mask body, said body having wall means defining an interior body wall and an exterior wall spaced from said interior body wall and defining therewith an exterior protective antechamber on said body having an exterior discharge opening, a speaking membrane mounted on said interior body wall and communicating with the interior of said mask body on its one side and with said protective antechamber on the opposite side thereof, and an exhalation valve mounted on said interior body wall and communicating on its one side with the interior of said mask body and on its opposite side with said protective antechamber.
Claim 3
Dependent Claim
29 words
A respirator mask, according to claim 1, wherein said means defining said inhalation passage includes a tubular portion, said exterior wall including as a portion thereof said tubular member.
Claim 4
Dependent Claim
31 words
A respirator mask, according to claim 1, wherein said exhalation valve includes an outer elastic valve holder mounted on said interior body wall and a valve body carried in said holder.
Claim 5
Dependent Claim
136 words
A respirator mask, comprising a mask body including a portion adapted to fit around the wearer''s head and a window-viewing portion, a connection piece fitted to the forward end of said mask body and including a tubular inlet having inlet valve means for the inflow of air and arranged adjacent said window-viewing means, means in said body adjacent said connection piece defining a generally centrally located auxiliary mask adapted to surround the nose, mouth and cheeks of the wearer, said connection piece including a wall adjacent the interior of said auxiliary mask, a speaking diaphragm mounted on said wall, said wall together with said tubular inlet defining an exterior protective chamber therebetween having an exterior discharge opening, and exhalation valve means connected to said body arranged to discharge into and being enclosed by said protective chamber.
Claim 6
Dependent Claim
136 words
A respirator mask, comprising a mask body including a portion adapted to fit around the wearer''s head and a window-viewing portion, a connection piece fitted to the forward end of said mask body and including a tubular inlet having inlet valve means for the inflow of air and arranged adjacent said window-viewing means, means in said body adjacent said connection piece defining a generally centrally located auxiliary mask adapted to surround the nose, mouth and cheeks of the wearer, said connection piece including a wall adjacent the interior of said auxiliary mask, a speaking diaphragm mounted on said wall, said wall together with said tubular inlet defining an exterior protective chamber therebetween having an exterior discharge opening, and exhalation valve means connected to said body arranged to discharge into and being enclosed by said protective chamber.
Claim 7
Dependent Claim
46 words
A respirator mask, according to claim 4, wherein said exhalation valve is mounted in said connection piece wall, said tubular inlet including a curved wall spaced outwardly from said speaking membrane and defining on its opposite side a flow passage directed upwardly against said window-viewing means.
Claim 8
Dependent Claim
27 words
A respirator mask, according to claim 5, wherein said protective chamber includes an exterior grid covering having the discharge opening therethrough for the passage of exhalation air.
Claim 9
Dependent Claim
132 words
A respirator mask, comprising a mask body including a portion adapted to fit around the wearer''s head and a window-viewing portion, attachment means associated with said body for attaching said body to a person''s head, a connection piece fitted to the forward end of said mask body and including a tubular inlet having inlet vaLve means for the inflow of air and arranged adjacent to said window-viewing means, an auxiliary mask defined within said mask body, a wall adjacent the interior or said auxiliary mask, s speaking diaphragm mounted on said wall, wall means spaced from said wall and defining with said wall an exterior chamber and grid, covering said diaphragm, and exhalation valve means connected to said body and arranged to discharge into and being enclosed by said protective exterior chamber.
Claim 10
Dependent Claim
132 words
A respirator mask, comprising a mask body including a portion adapted to fit around the wearer''s head and a window-viewing portion, attachment means associated with said body for attaching said body to a person''s head, a connection piece fitted to the forward end of said mask body and including a tubular inlet having inlet vaLve means for the inflow of air and arranged adjacent to said window-viewing means, an auxiliary mask defined within said mask body, a wall adjacent the interior or said auxiliary mask, s speaking diaphragm mounted on said wall, wall means spaced from said wall and defining with said wall an exterior chamber and grid, covering said diaphragm, and exhalation valve means connected to said body and arranged to discharge into and being enclosed by said protective exterior chamber.
References Cited (Backward Citations)
US2326650A
Cited
US2835250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |