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US3724482A
Expired / Lapsed
US
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Breathing valve
Assignee: Linde Sverige AB
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Filing: 1971-03-05
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Granted: 1973-04-03
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Expires: 1991-03-05
Abstract
Abstract A breathing valve having a housing comprising an inlet chamber in communication with which is an inlet opening controlled by an inlet valve, a passage to the breathing organs of the user and an exhalation valve. A control diaphragm subject on one side to the pressure in the inlet chamber acts through an intermediate member to control the inlet valve. An overpressure valve on the side of the control diaphragm across from the inlet chamber receives fluid through the exhalation valve and when the pressure in the overpressure chamber builds up it causes the control diaphragm to open the inlet valve. Springs act on the two diaphragms urging them towards the inlet valve opened position, thereby setting a predetermined pressure value in the overpressure chamber. With this structure, an overpressure is created in the inlet chamber during both inhalation and exhalation.
Inventors
- 👤 S Ekstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:44
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/22; B63C11/2227; A; A62; A62B; A62B9/00; A62B9/02; A62B9/022; F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; Y; Y10; Y10S; Y10S137/00; Y10S137/908
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
244 words
A breathing vaLve comprising: a housing having an inlet, an outlet and an opening adapted to be connected to lead to a user, an inlet chamber, an inlet valve controlling the flow of gas from the inlet to the inlet chamber, the said inlet and the said opening both being in fluid connection with the inlet chamber, a control diaphragm, one side of which is subjected to gas pressure in the inlet chamber, a control means including a lever operatively connecting said control diaphragm and the inlet valve such that movement of the control diaphragm actuates the inlet valve, an overpressure diaphragm spaced from the control diaphragm and forming with it an overpressure chamber, a first outlet valve connecting the inlet chamber and the overpressure chamber and opening in a direction toward the overpressure chamber, means including a stud connected with the central part of the overpressure diaphragm and extending against the control diaphragm, a control spring acting on the overpressure diaphragm holding said stud against the control diaphragm in a direction tending to operate the lever to open the inlet valve, a second outlet valve connecting the overpressure chamber and the surrounding atmosphere, a second spring for loading said second outlet valve, and an adjustable member in the housing, both said springs resting against said adjustable member, wherein adjustment of the adjustable member varies the force exerted by the springs on the overpressure diaphragm and hence varies the overpressure in the overpressure chamber.
Claim 2
Dependent Claim
244 words
A breathing vaLve comprising: a housing having an inlet, an outlet and an opening adapted to be connected to lead to a user, an inlet chamber, an inlet valve controlling the flow of gas from the inlet to the inlet chamber, the said inlet and the said opening both being in fluid connection with the inlet chamber, a control diaphragm, one side of which is subjected to gas pressure in the inlet chamber, a control means including a lever operatively connecting said control diaphragm and the inlet valve such that movement of the control diaphragm actuates the inlet valve, an overpressure diaphragm spaced from the control diaphragm and forming with it an overpressure chamber, a first outlet valve connecting the inlet chamber and the overpressure chamber and opening in a direction toward the overpressure chamber, means including a stud connected with the central part of the overpressure diaphragm and extending against the control diaphragm, a control spring acting on the overpressure diaphragm holding said stud against the control diaphragm in a direction tending to operate the lever to open the inlet valve, a second outlet valve connecting the overpressure chamber and the surrounding atmosphere, a second spring for loading said second outlet valve, and an adjustable member in the housing, both said springs resting against said adjustable member, wherein adjustment of the adjustable member varies the force exerted by the springs on the overpressure diaphragm and hence varies the overpressure in the overpressure chamber.
Claim 3
Dependent Claim
17 words
A breathing valve according to claim 1, wherein the adjustable member comprises a lid having openings therein.
Claim 4
Dependent Claim
33 words
A breathing valve according to claim 1, wherein the circumference of the overpressure diaphragm forms a movable element of said second outlet valve, said second spring loading said circumference of the overpressure diaphragm.
Claim 5
Dependent Claim
27 words
A breathing valve according to claim 1, wherein the control diaphragm includes openings which are closed by the said first outlet valve. AGA Aktiebolag 03 Lidingo SW
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |