Patent US3710780A successfully refreshed from Google Patents.
US3710780A
Expired / Lapsed
US
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Respiratory device with variable expiratory pressure resistance
Assignee: Individual
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Filing: 1971-08-05
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Granted: 1973-01-16
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Expires: 1991-08-05
Abstract
Abstract A device to permit more efficient breathing by medical patients comprising a mouthpiece having a passage portion for communication with the patient''s mouth and inlet and outlet passages communicating with the first passage portion. The inlet and outlet passages are provided, respectively, with inlet and outlet check valves. A flexible conduit extends from the outlet check valve portion of the mouthpiece to a receptacle containing a liquid and the outlet end of the flexible conduit is immersed in the liquid to an adjusted depth to interpose a predetermined variable fluid resistance to air flow from said mouthpiece outlet passage by way of said conduit.
Inventors
- 👤 R Milch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:58
CPC Classifications
A; A63; A63B; A63B23/00; A63B23/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
116 words
Respiratory apparatus for conducing more efficient breathing by medical patients, said apparatus comprising a mouthpiece having an inlet and an outlet passage for mouth breathing, a check valve in said inlet passage permitting air flow into said mouthpiece but closable under retrograde flow, a liquid containing receptacle, a conduit leading from said outlet passage and terminating in a portion projecting into the liquid in said receptacle to a predetermined depth, whereby exhalation by the patient through said mouthpiece and said conduit is effected against a liquid head as measured by the depth of immersion of said outlet conduit terminal portion in said liquid, and means preventing retrograde fluid flow from said conduit to said outlet passage.
Claim 2
Dependent Claim
116 words
Respiratory apparatus for conducing more efficient breathing by medical patients, said apparatus comprising a mouthpiece having an inlet and an outlet passage for mouth breathing, a check valve in said inlet passage permitting air flow into said mouthpiece but closable under retrograde flow, a liquid containing receptacle, a conduit leading from said outlet passage and terminating in a portion projecting into the liquid in said receptacle to a predetermined depth, whereby exhalation by the patient through said mouthpiece and said conduit is effected against a liquid head as measured by the depth of immersion of said outlet conduit terminal portion in said liquid, and means preventing retrograde fluid flow from said conduit to said outlet passage.
Claim 3
Dependent Claim
29 words
Respiratory apparatus as in claim 1 wherein said means for preventing retrograde fluid flow from said conduit to said outlet passage comprises a Check valve in said outlet passage.
Claim 4
Dependent Claim
57 words
Respiratory apparatus as in claim 1 wherein said check valve comprises a flexible disconnected to said inlet passage at opposite diametral points whereby the two halves thereof flex freely in the direction of fluid flow, and an annular seat portion adjacent to said valve at the outer side thereof to prevent flexure thereof in the opposite direction.
Claim 5
Dependent Claim
55 words
Respiratory apparatus as in claim 2 wherein said check valve comprises flexible discs connected to said passages at opposite diametral points whereby the two halves of each valve flex freely in the direction of air flow, and annular seat portions in said passages adjacent to said valves to prevent flexure thereof in the opposite direction.
Claim 6
Dependent Claim
29 words
Respiratory apparatus as in claim 1 wherein said receptacle is graduated to show the depth of liquid therein and the depth of immersion of said outlet conduit terminal portion.
Claim 7
Dependent Claim
29 words
Respiratory apparatus as in claim 5 wherein said receptacle includes adjustable means for supporting said outlet conduit to support the same for immersion to various depths in said liquid.
References Cited (Backward Citations)
FR779571A
Cited
US3511228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |