US4355636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humdifier and heater for air to be inhaled for connection to an inhalation conduit of a respirator
Assignee: Draegerwerk AG and Co KGaA
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Filing: 1980-06-20
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Granted: 1982-10-26
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Expires: 2000-06-20
Abstract
Abstract A humidifier and heater for air to be inhaled for connection to an inhalation conduit of a respirator comprises a housing having a bundle of vapor permeable fiber tubes which have evaporation fiber wall surfaces extending therethrough. A packing is arranged adjacent each end of the housing in said tubes and seals the space in the housing around the tubes between the packing. The tubes in the interior of the housing in the space have a coating on their exteriors of at least either copper or silver. Warm water is circulated into the housing in the space around the tubes and the inhalation air is directed through the tubes or vice versa.
Inventors
- 👤 Georg-Wilhelm Oetjen
- 👤 Frank Benthin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:25
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/10; A61M16/14; A61M16/16; A61M16/142; A61M16/145; A61M2202/00; A61M2202/02; A61M2202/0208; A61M2202/03; Y; Y10; Y10S; Y10S165/00; Y10S165/907; Y10S261/00; Y10S261/65
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
124 words
A respirator humidifier and heater for air to be inhaled for connection to an inhalation conduit of a respirator, comprising a housing having a bundle of vapor permeable fiber tubes with evaporation fiber wall surfaces extending therethrough, a packing adjacent each end of said tubes sealing a space in said housing around said tubes between said packings, said tubes and the interior of said housing having a thin porous coating on their exterior surfaces of at least one of copper and silver, means for passing inhalation air into the housing in the space around said tubes between said packings, means for circulating warm water through said tubes, wherein said at least one of copper and silver are evaporated onto the surfaces in a vacuum.
Claim 2
Dependent Claim
124 words
A respirator humidifier and heater for air to be inhaled for connection to an inhalation conduit of a respirator, comprising a housing having a bundle of vapor permeable fiber tubes with evaporation fiber wall surfaces extending therethrough, a packing adjacent each end of said tubes sealing a space in said housing around said tubes between said packings, said tubes and the interior of said housing having a thin porous coating on their exterior surfaces of at least one of copper and silver, means for passing inhalation air into the housing in the space around said tubes between said packings, means for circulating warm water through said tubes, wherein said at least one of copper and silver are evaporated onto the surfaces in a vacuum.
Claim 3
Dependent Claim
123 words
A respirator humidifier and heater for air to be inhaled for connection to an inhalation conduit of a respirator, comprising a housing having a bundle of vapor permeable fiber tubes with evaporation fiber wall surfaces extending therethrough, a packing adjacent each end of said tubes sealing a space in said housing around said tubes between said packings, said tubes and the interior of said housing having a thin porous coating on their exterior surfaces of at least one of copper and silver, means for passing inhalation air into the housing in the space around said tubes between said packings, means for circulating warm water through said tubes, wherein said at least one of copper and silver are applied to the surfaces by sputtering.
Claim 4
Dependent Claim
123 words
A respirator humidifier and heater for air to be inhaled for connection to an inhalation conduit of a respirator, comprising a housing having a bundle of vapor permeable fiber tubes with evaporation fiber wall surfaces extending therethrough, a packing adjacent each end of said tubes sealing a space in said housing around said tubes between said packings, said tubes and the interior of said housing having a thin porous coating on their exterior surfaces of at least one of copper and silver, means for passing inhalation air into the housing in the space around said tubes between said packings, means for circulating warm water through said tubes, wherein said at least one of copper and silver are applied to the surfaces by sputtering.
Claim 5
Dependent Claim
48 words
A humidifier according to claim 1 or 2, wherein said housing includes an intermediate case part carrying said bundle of tubes and an end piece fitted to said casing part enclosing each end and providing a passage for the inlet and outlet of the air to be inhaled.
References Cited (Backward Citations)
US1123201A
Cited
US2448315A
Cited
US2670933A
Cited
US3170512A
Cited
US3747598A
Cited
US4146597A
Cited
US4155961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |