Patent US3794072A successfully refreshed from Google Patents.
US3794072A
Expired / Lapsed
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Oxygen diluter device
Assignee: CREDITANSTALT-BANKVEREIN
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Filing: 1972-06-26
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Granted: 1974-02-26
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Expires: 1992-06-26
Abstract
Abstract An improved device for controlling oxygen concentration delivered to an oxygen mask comprises a nozzle portion disposed at one end for attaching an oxygen delivery tube, a hollow gas delivery portion at the opposite end for directing gas to an oxygen mask and a tunnel portion disposed between the nozzle and gas delivery portion having support bars extending between the nozzle and delivery portions and a plurality of spaced arcuate ribs secured along the bars between which ribs are defined a plurality of air entrainment ports through which atmospheric air is drawn for diluting a stream of oxygen passing along the tunnel. Air restriction closure members are secured between the ribs selectively closing one or more of the ports for metering air entrainment and oxygen concentration delivered to the mask.
Inventors
- 👤 D Diedrich
- 👤 J Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:16
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/06; A61M16/10; A61M16/12; A61M16/122; A61M16/125; A61M16/127; A61M16/0683; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87571; Y10T137/87587; Y10T137/87619; Y10T137/87627
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
157 words
A device for diluting an oxygen stream delivered to a patient comprising: a. a nozzle portion disposed at one end for attaching an oxygen supply tube; b. a hollow gas delivery portion at the opposite end for directing gas to the patient; c. a hollow tunnel portion extending between the nozzle and gas delivery portions including a pair of oppositEly disposed rods extending between said nozzle and gas delivery portions and a plurality of arcuate and parallel ribs secured around both sides of said rods and spaced therealong whereby a tunnel is defined interiorly of said ribs and rods and a plurality of ports are defined between said ribs; and d. a closure member for each port for being selectively secured on said device to close at least a portion of a respective port whereby an oxygen stream flowing through the tunnel portion is mixed and diluted with entrained air entering through one or more open ports.
Claim 2
Independent Claim
157 words
A device for diluting an oxygen stream delivered to a patient comprising: a. a nozzle portion disposed at one end for attaching an oxygen supply tube; b. a hollow gas delivery portion at the opposite end for directing gas to the patient; c. a hollow tunnel portion extending between the nozzle and gas delivery portions including a pair of oppositEly disposed rods extending between said nozzle and gas delivery portions and a plurality of arcuate and parallel ribs secured around both sides of said rods and spaced therealong whereby a tunnel is defined interiorly of said ribs and rods and a plurality of ports are defined between said ribs; and d. a closure member for each port for being selectively secured on said device to close at least a portion of a respective port whereby an oxygen stream flowing through the tunnel portion is mixed and diluted with entrained air entering through one or more open ports.
Claim 3
Dependent Claim
25 words
The device of claim 1 wherein said closure members comprise air restriction discs each of which is shaped to substantially occlude one of said ports.
Claim 4
Dependent Claim
25 words
The device of claim 1 wherein said nozzle portion includes a restricted passageway for creating a high velocity oxygen stream directed into said tunnel portion.
Claim 5
Dependent Claim
113 words
The device of claim 3 wherein said device has three of said ports and closure members and wherein with all three of said closure members secured an oxygen concentration of about 40 percent is delivered at a flow rate of 8 liters per minute, with two of said closure members secured an oxygen concentration of about 35 percent is delivered at 8 liters per minute flow, with one of said closure members secured an oxygen concentration of about 28 percent is delivered at 4 liters per minute flow, and with no closure members secured and all ports open an oxygen concentration of about 24 percent is delivered at 4 liters per minute flow.
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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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |