Patent US3799185A successfully refreshed from Google Patents.
US3799185A
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Breathing valve
Assignee: Kohler Co
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Filing: 1972-07-03
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Granted: 1974-03-26
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Expires: 1992-07-03
Abstract
Abstract A breathing valve of the type having concentric inhalation and exhalation valves has an exhaust passage with tapered inlet ports that provide a variable orifice to minimize flutter. Flutter is further reduced by having the exhalation valve mounted on an unsupported rubber sleeve that can flex to accommodate pressure variations, and by a mushroom inhalation valve that has a Ushaped flex ring with its open end facing the inhalation chamber so that the periphery of the valve lifts as a whole. A modified version of the valve for respiratory use includes a control ring operable to progressively open and close the exhaust passage, another modified version for use in anesthesia includes a collector shroud that encloses the exhaust passage and is connectable to a discharge line, and a third modified version includes both the ring and shroud.
Inventors
- 👤 P Milnes
- 👤 K Muellenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:13
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; F16K15/1402; F16K15/148; F16K2200/00; F16K2200/20; F16K2200/202; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7841
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
330 words
In a breathing valve of the type comprising: a housing defining an inhalation chamber on the supply side, an exhalation chamber on the user side that terminates at its inner end in an annular exhalation valve seat facing the inhalation chamber, and an outwardly opening annular exhaust passage downstream of the exhalation chamber; an exhalation valve disc on the inhalation chamber side of the exhalation valve seat that is movable between a closed position where its periphery engages the seat to close off the exhalation chamber from the exhaust passage and an open position where it is spaced from the exhalation valve seat to allow communication between the exhalation chamber and exhaust passage, the exhalation valve disc being biased toward closed position; a cylindrical sleeve connected between the periphery of the inhalation chamber side of the exhalation valve disc and the housing to seal off the inhalation chamber from the exhalation chamber and the exhaust passage, said sleeve being capable of accommodating axial movement of the exhalation valve disc; an inhalation port extending through the exhalation valve disc within the area circumscribed by the exhalation valve seat; and an inhalation check valve that is adapted to open and close the inhalation port to allow communication only from the inhalation chamber to the exhalation chamber; the improvement wherein: the housing includes a cylindrical guide wall that relatively closely surrounds the edge of the exhalation valve disc to guide the same in its axial movement; and the exhaust passage includes a series of slots defining inlet ports leading through the guide wall, the slots being of substantial axial length and extending from upper ends that are approximately at the level of the exhalation valve disc when the same is in closed position to lower ends that are approximately at the level of the edge of the exhalation valve disc when the same is in maximum open position, the upper inner edge portions of the slots being out-wardly tapered from top to bottom.
Claim 2
Dependent Claim
330 words
In a breathing valve of the type comprising: a housing defining an inhalation chamber on the supply side, an exhalation chamber on the user side that terminates at its inner end in an annular exhalation valve seat facing the inhalation chamber, and an outwardly opening annular exhaust passage downstream of the exhalation chamber; an exhalation valve disc on the inhalation chamber side of the exhalation valve seat that is movable between a closed position where its periphery engages the seat to close off the exhalation chamber from the exhaust passage and an open position where it is spaced from the exhalation valve seat to allow communication between the exhalation chamber and exhaust passage, the exhalation valve disc being biased toward closed position; a cylindrical sleeve connected between the periphery of the inhalation chamber side of the exhalation valve disc and the housing to seal off the inhalation chamber from the exhalation chamber and the exhaust passage, said sleeve being capable of accommodating axial movement of the exhalation valve disc; an inhalation port extending through the exhalation valve disc within the area circumscribed by the exhalation valve seat; and an inhalation check valve that is adapted to open and close the inhalation port to allow communication only from the inhalation chamber to the exhalation chamber; the improvement wherein: the housing includes a cylindrical guide wall that relatively closely surrounds the edge of the exhalation valve disc to guide the same in its axial movement; and the exhaust passage includes a series of slots defining inlet ports leading through the guide wall, the slots being of substantial axial length and extending from upper ends that are approximately at the level of the exhalation valve disc when the same is in closed position to lower ends that are approximately at the level of the edge of the exhalation valve disc when the same is in maximum open position, the upper inner edge portions of the slots being out-wardly tapered from top to bottom.
Claim 3
Dependent Claim
68 words
A breathing valve according to claim 1 wherein: the exhaust passage terminates at its outer end in a portion that lies in parallel to the length of the housing; and there is a control ring surrounding the exterior of the housing and threadedly mounted thereon to be axially movaBle toward and away from the outer end portion of the exhaust passage to progressively close and open the same.
Claim 4
Dependent Claim
54 words
A breathing valve according to claim 2 wherein: there is an annular collector shroud fixed to the exterior of the housing that encloses the outer end portion of the exhaust passage and defines a collector passage leading to an outlet; and the control ring extends axially through the shroud with an airtight seal therebetween.
Claim 5
Dependent Claim
276 words
In a breathing valve of the type comprising: a housing defining an inhalation chamber on the supply side, an exhalation chamber on the user side that terminates at its inner end in an annular exhalation valve seat facing the inhalation chamber, and an outwardly opening annular exhaust passage downstream of the exhalation chamber; an exhalation valve disc on the inhalation chamber side of the exhalation valve seat that is movable between a closed position where its periphery engages the seat to close off the exhalation chamber from the exhaust passage and an open position where it is spaced from the exhalation valve seat to allow communication between the exhalation chamber and exhaust passage, the exhalation valve disc being biased toward closed position; a cylindrical sleeve connected between the periphery of the inhalation chamber side of the exhalation valve disc and the housing to seal off the inhalation chamber from the exhalation chamber and the exhaust passage, said sleeve being capable of accommodating axial movement of the exhalation valve disc; an inhalation port extending through the exhalation valve disc within the area circumscribed by the exhalation valve seat; and an inhalation check valve that is adapted to open and close the inhalation port to allow communication only from the inhalation chamber to the exhalation chamber; the improvement wherein: the exhaust passage terminates at its outer end in a portion that lies parallel to the length of the housing; and there is a control ring surrounding the exterior of the housing and threadedly mounted thereon to be axially movable toward and away from the outer end portion of the exhaust passage to progressively close and open the same.
Claim 6
Dependent Claim
276 words
In a breathing valve of the type comprising: a housing defining an inhalation chamber on the supply side, an exhalation chamber on the user side that terminates at its inner end in an annular exhalation valve seat facing the inhalation chamber, and an outwardly opening annular exhaust passage downstream of the exhalation chamber; an exhalation valve disc on the inhalation chamber side of the exhalation valve seat that is movable between a closed position where its periphery engages the seat to close off the exhalation chamber from the exhaust passage and an open position where it is spaced from the exhalation valve seat to allow communication between the exhalation chamber and exhaust passage, the exhalation valve disc being biased toward closed position; a cylindrical sleeve connected between the periphery of the inhalation chamber side of the exhalation valve disc and the housing to seal off the inhalation chamber from the exhalation chamber and the exhaust passage, said sleeve being capable of accommodating axial movement of the exhalation valve disc; an inhalation port extending through the exhalation valve disc within the area circumscribed by the exhalation valve seat; and an inhalation check valve that is adapted to open and close the inhalation port to allow communication only from the inhalation chamber to the exhalation chamber; the improvement wherein: the exhaust passage terminates at its outer end in a portion that lies parallel to the length of the housing; and there is a control ring surrounding the exterior of the housing and threadedly mounted thereon to be axially movable toward and away from the outer end portion of the exhaust passage to progressively close and open the same.
Claim 7
Dependent Claim
54 words
A breathing valve according to claim 4 wherein: there is an annular collector shroud fixed to the exterior of the housing that encloses the outer end portion of the exhaust passage and defines a collector passage leading to an outlet; and the control ring extends axially through the shroud with an airtight seal therebetween.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |