Patent US3221733A successfully refreshed from Google Patents.
US3221733A
Expired / Lapsed
US
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Pressure breathing therapy unit
Assignee: Bennett Respiration Products Inc
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Filing: 1961-10-02
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Granted: 1965-12-07
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Expires: 1981-10-02
Abstract
No abstract record available.
Inventors
- 👤 Noel F Beasley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:49
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/10; A61M16/105; A61M16/106; A61M16/107; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7794
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
IN A RESPIRATION UNIT HAVING AN AIR PUMP AND VALVE MEANS CONNECTED TO SAID PUMP FOR CONTROLLING AIR FLOW TO A PATIENT, A FLOW AND PRESSURE REGULATOR IN SERIES WITH AND BETWEEN SAID PUMP AND VALVE MEANS, SAID REGULATOR COMPRISING: A BODY; A MOVABLE DIAPHRAGM SECURED TO SAID BODY AND COOPERATING THEREWITH TO DEFINE A PRESSURE CHAMBER; MEANS IN SAID BODY FORMING AN INLET PASSAGE; ASPIRATOR MEANS MOUNTED ON SAID BODY AND ARRANGED FOR RECEIVING COMPRESSED AIR FROM SAID PUMP AND DISCHARGING INTO SAID CHAMBER THROUGH SAID INLET PASSAGE, SAID ASPIRATOR MEANS BEING POWERED BY COMPRESSED AIR FROM SAID PUMP TO ASPIRATE AMBIENT AIR INTO SAID CHAMBER AT A RATE DEPENDENT UPON THE PRESSURE IN SAID CHAMBER; MEANS IN SAID BODY FORMING AN OUTLET PASSAGE FROM SAID CHAMBER FOR DELIVERING AIR TO SAID VALVE MEANS; MEANS IN
Claim 2
Dependent Claim
137 words
IN A RESPIRATION UNIT HAVING AN AIR PUMP AND VALVE MEANS CONNECTED TO SAID PUMP FOR CONTROLLING AIR FLOW TO A PATIENT, A FLOW AND PRESSURE REGULATOR IN SERIES WITH AND BETWEEN SAID PUMP AND VALVE MEANS, SAID REGULATOR COMPRISING: A BODY; A MOVABLE DIAPHRAGM SECURED TO SAID BODY AND COOPERATING THEREWITH TO DEFINE A PRESSURE CHAMBER; MEANS IN SAID BODY FORMING AN INLET PASSAGE; ASPIRATOR MEANS MOUNTED ON SAID BODY AND ARRANGED FOR RECEIVING COMPRESSED AIR FROM SAID PUMP AND DISCHARGING INTO SAID CHAMBER THROUGH SAID INLET PASSAGE, SAID ASPIRATOR MEANS BEING POWERED BY COMPRESSED AIR FROM SAID PUMP TO ASPIRATE AMBIENT AIR INTO SAID CHAMBER AT A RATE DEPENDENT UPON THE PRESSURE IN SAID CHAMBER; MEANS IN SAID BODY FORMING AN OUTLET PASSAGE FROM SAID CHAMBER FOR DELIVERING AIR TO SAID VALVE MEANS; MEANS IN
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |