US3467137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Demand valve
Assignee: Automatic Sprinkler Corp
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Filing: 1965-09-02
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Granted: 1969-09-16
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Expires: 1985-09-02
Abstract
No abstract record available.
Inventors
- 👤 William H Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:26
CPC Classifications
F; F16; F16K; F16K13/00; A; A62; A62B; A62B9/00; A62B9/02; A62B9/022; A62B9/025; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
A BREATHING APPARATUS COMPRISING: A HOLLOW CASING HAVING AN OPENING IN ONE WALL THEREOF; A FLEXIBLE DIAPHRAGM POSITIONED IN SAID OPENING AND SECURED TO SAID CASING SO THAT SAID DIAPHRAGM AND SAID CASING FORM A CHAMBER, SAID CASING HAVING A FLUID INLET ADAPTED TO BE CONNECTED TO A SOURCE OF BREATHING FLUID UNDER PRESSURE AND A FLUID OUTLET IN COMMUNICATION WITH SAID CHAMBER; MEANS FORMING AN ORIFICE BETWEEN SAID FLUID INLET AND SAID CHAMBER; VALVE MEANS OPERABLY ASSOCIATED WITH SAID ORIFICE FOR CONTROLLING THE FLOW OF BREATHING FLUID THERETHROUGH, SAID VALVE MEANS INCLUDING A VALVE BODY AND A VALVE SEAT HAVING AN ORIFICE DEFINING SEATING SURFACE, THE LENGTHWISE DIMENSION OF SAID SURFACE BEING RELATIVELY GREATER THAN THE WIDTHWISE DIMENSION THEREOF, SAID DIAPHRAGM BEING RESPONSIVE TO DIFFERENTIAL VARIATIONS IN PRESSURE WITHIN AND WITHOUT SAID CHAMBER; MEANS RESPONSIVE TO MOVEMENT OF SAID DIAPHRAGM FOR TILTING SAID VALVE BODY TO EFFECT OPENING OF SAID ORIFICE; AND GUIDE MEANS ADAPTED TO CONSTRAIN TILTING MOTION OF SAID VALVE BODY TO A PLANE NORMAL TO SAID LENGTHWIDE DIMENSION OF SAID VALVE SEAT SURFACE.
Claim 2
Dependent Claim
177 words
A BREATHING APPARATUS COMPRISING: A HOLLOW CASING HAVING AN OPENING IN ONE WALL THEREOF; A FLEXIBLE DIAPHRAGM POSITIONED IN SAID OPENING AND SECURED TO SAID CASING SO THAT SAID DIAPHRAGM AND SAID CASING FORM A CHAMBER, SAID CASING HAVING A FLUID INLET ADAPTED TO BE CONNECTED TO A SOURCE OF BREATHING FLUID UNDER PRESSURE AND A FLUID OUTLET IN COMMUNICATION WITH SAID CHAMBER; MEANS FORMING AN ORIFICE BETWEEN SAID FLUID INLET AND SAID CHAMBER; VALVE MEANS OPERABLY ASSOCIATED WITH SAID ORIFICE FOR CONTROLLING THE FLOW OF BREATHING FLUID THERETHROUGH, SAID VALVE MEANS INCLUDING A VALVE BODY AND A VALVE SEAT HAVING AN ORIFICE DEFINING SEATING SURFACE, THE LENGTHWISE DIMENSION OF SAID SURFACE BEING RELATIVELY GREATER THAN THE WIDTHWISE DIMENSION THEREOF, SAID DIAPHRAGM BEING RESPONSIVE TO DIFFERENTIAL VARIATIONS IN PRESSURE WITHIN AND WITHOUT SAID CHAMBER; MEANS RESPONSIVE TO MOVEMENT OF SAID DIAPHRAGM FOR TILTING SAID VALVE BODY TO EFFECT OPENING OF SAID ORIFICE; AND GUIDE MEANS ADAPTED TO CONSTRAIN TILTING MOTION OF SAID VALVE BODY TO A PLANE NORMAL TO SAID LENGTHWIDE DIMENSION OF SAID VALVE SEAT SURFACE.
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) | 1972-09-15 | 1973-03-17 | 1973-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-15 | 1977-03-17 | 1977-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-15 | 1981-03-17 | 1981-09-16 | $7700.00 | Window Closed / Lapsed |