Patent US4805608A successfully refreshed from Google Patents.
US4805608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breathing apparatus
Assignee: Draegerwerk AG and Co KGaA
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Filing: 1987-03-27
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Granted: 1989-02-21
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Expires: 2007-03-27
Abstract
Abstract A breathing apparatus removably mounted in a housing has a device for processing the breathing gas. This device includes a container and a charge for processing the breathing air which is disposed in the container. The container has air pass-through openings at least one of which is closable with a stopper. The breathing apparatus provides an indication of possible entry of water vapor and this indication is limited to only the water-vapor sensitive parts of the breathing apparatus. For this purpose, a charge is provided in the stopper having a moisture-sensitive indicator which is visible through a viewing window from outside the housing and this charge is in gas contact with the charge of the device for processing the breathing gas.
Inventors
- 👤 Wolfgang Eckstein
- 👤 Gunther Kolbe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:15
CPC Classifications
A; A62; A62B; A62B19/00; A62B25/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
131 words
In a breathing apparatus for a person including means for processing breathing air and housing means for enclosing said processing means until required for use, wherein the improvement comprises: said means for processing the breathing air including: a container having first and second breathing air pass-through openings; breathing conduit means connected to said first opening for use by the person when breathing with the apparatus; chemical means disposed in said container for processing the breathing air; stopper means for closing said second opening until said container is required for use; and, moisture-sensitive means held in said stopper means in gas contact with said chemical means for visually indicating the presence of moisture in said container; and, window means for permitting viewing of said moisture-sensitive means from outside of said housing means.
Claim 2
Dependent Claim
131 words
In a breathing apparatus for a person including means for processing breathing air and housing means for enclosing said processing means until required for use, wherein the improvement comprises: said means for processing the breathing air including: a container having first and second breathing air pass-through openings; breathing conduit means connected to said first opening for use by the person when breathing with the apparatus; chemical means disposed in said container for processing the breathing air; stopper means for closing said second opening until said container is required for use; and, moisture-sensitive means held in said stopper means in gas contact with said chemical means for visually indicating the presence of moisture in said container; and, window means for permitting viewing of said moisture-sensitive means from outside of said housing means.
Claim 3
Dependent Claim
109 words
The breathing apparatus of claim 1, said chemical means being a chemical means for binding carbon dioxide and releasing oxygen; the breathing air processing means further comprising: a breathing bag having a closed end and an open end, said open end attached to said container in surrounding relationship to said second opening and having a collapsed condition when said processing means is not in use and disposed in said housing means and an extended condition when said processing means has been removed from said housing means; and, said stopper means mounted on said breathing bag for closing said second opening when said breathing bag is in said collapsed condition.
Claim 4
Dependent Claim
113 words
The breathing apparatus of claim 2, said breathing bag havig at least one aperture formed therein opposite said second opening and said stopper means being a small sack overlying said at least one aperture on the exterior surface of said bag and holding said moisture-sensitive means; said sack including: a felt-like wall adjacent said at least one aperture and a transparent foil overlying said felt-like wall; and, the peripheries of said felt-like wall and said foil attached to each other and to said breathing bag about said at least one aperture so as to cause said felt-like wall and said foil to conjointly define an enclosed space for accommodating said moisture-sensitive means therein.
Claim 5
Dependent Claim
35 words
The breathing apparatus of claim 3, wherein said at least one aperture comprises a plurality of aperturs formed in said breathing bag to permit said gas contact between said chemical means and said moisture-sensitive means.
Claim 6
Dependent Claim
125 words
A breathing arrangement comprising: a device for processing breathing air; said device including: a container having first and second breathing air pass-through openings; breathing conduit means connected to said first opening and adapted for use by a person when breathing with the apparatus; chemical means disposed in said container for processing the breathing air; stopper means for closing said second opening until said container is required for use; and, moisture-sensitive means held in said stopper means in gas contact with said chemical means for visually indicating the presence of moisture in said container; removable housing means for enclosing said device until required for use; and, window means mounted in said housing means for permitting viewing of said moisture-sensitive means from outside of said housing means.
Claim 7
Dependent Claim
125 words
A breathing arrangement comprising: a device for processing breathing air; said device including: a container having first and second breathing air pass-through openings; breathing conduit means connected to said first opening and adapted for use by a person when breathing with the apparatus; chemical means disposed in said container for processing the breathing air; stopper means for closing said second opening until said container is required for use; and, moisture-sensitive means held in said stopper means in gas contact with said chemical means for visually indicating the presence of moisture in said container; removable housing means for enclosing said device until required for use; and, window means mounted in said housing means for permitting viewing of said moisture-sensitive means from outside of said housing means.
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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) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |