US3643686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-velocity breathing valve
Assignee: Individual
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Filing: 1970-10-21
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Granted: 1972-02-22
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Expires: 1990-10-21
Abstract
Abstract A high-flow, low-resistance minimal dead space breathing valve having intake and exhaust flow paths separated but coaxial and coupled with in-line K-valves which reduce turbulence and flow resistance to a minimum. The breathing valve is particularly suitable for making very accurate maximal breathing capacity and oxygen cost determinations under conditions of severe exercise.
Inventors
- 👤 Ewald Koegel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:26
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/20; A61M16/208; A61B; A61B5/00; A61B5/08; A61B5/097; A62; A62B; A62B9/00; A62B9/02; F; F16; F16K; F16K15/00; F16K15/14; F16K15/1401; F16K15/144; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
159 words
A high-velocity breathing valve for controlling the flow of intake air and exhaust gas to and from an individual, said breathing valve comprising a main housing having at least one inlet duct operatively connected to the sidewall thereof, an inline K-valve positioned in said inlet duct for restricting the flow of air to the inward direction, a tubular section at the lower end of said main housing for attachment to a standard mouthpiece, said inlet duct being operatively connected to said tubular section, an exhaust section within said main housing having an exhaust duct opening in the upper end thereof, an outlet tube attached to said exhaust duct for connection with a gas collection device, means in said exhaust section for separating the exhaust flow path from the intake flow path while maintaining the flow paths in coaxial relationship, and an inline K-valve positioned in said exhaust duct for restricting the flow of expiration gas to the outward direction.
Claim 2
Dependent Claim
159 words
A high-velocity breathing valve for controlling the flow of intake air and exhaust gas to and from an individual, said breathing valve comprising a main housing having at least one inlet duct operatively connected to the sidewall thereof, an inline K-valve positioned in said inlet duct for restricting the flow of air to the inward direction, a tubular section at the lower end of said main housing for attachment to a standard mouthpiece, said inlet duct being operatively connected to said tubular section, an exhaust section within said main housing having an exhaust duct opening in the upper end thereof, an outlet tube attached to said exhaust duct for connection with a gas collection device, means in said exhaust section for separating the exhaust flow path from the intake flow path while maintaining the flow paths in coaxial relationship, and an inline K-valve positioned in said exhaust duct for restricting the flow of expiration gas to the outward direction.
Claim 3
Dependent Claim
51 words
The high velocity breathing valve defined in claim 1 wherein said main housing is cylindrical in configuration and includes two inlet ducts operatively connected to the sidewall thereof forming 60* included angles with the central axis of said main housing, each of said inlet ducts having an in-line K-valve positioned therein.
Claim 4
Dependent Claim
53 words
The high-velocity breathing valve defined in claim 2 wherein said in-line K-valves are conical in configuration and include a flexible membrane formed by molding on a conical form, and a Y-section support shaped to the same conical form at one end, said membrane being cemented to said Y-section support to form said K-valve.
Claim 5
Dependent Claim
71 words
The high-velocity breathing valve defined in claim 2 wherein said means for separating the intake flow path from the exhaust flow path includes a conical air expander positioned within said exhaust section, said conical air expander serving to allow expansion of the exhaled air as it passes toward said outlet tube, thereby reducing the velocity and turbulence of the air before it reaches the in-line K-valve positioned in said exhaust duct.
Claim 6
Dependent Claim
53 words
The high-velocity breathing valve defined in claim 4 wherein the diameters of the tubular section at the lower end of said main housing and the lower end of the conical air expander are so proportioned that their free areas are equal, thereby preventing airway restriction during expiration and inspiration under severe exercise conditions.
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |