Patent US4553176A successfully refreshed from Google Patents.
Patent US3068879A successfully refreshed from Google Patents.
US3068879A
Expired / Lapsed
US
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Oxygen supply system
Assignee: BOC Group Ltd
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Filing: 1961-05-31
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Granted: 1962-12-18
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Expires: 1981-05-31
Abstract
No abstract record available.
Inventors
- 👤 Snowman John Washington
- 👤 Bell Alec Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:02
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/02; G; G05; G05D; G05D11/00; G05D11/006; Y; Y10; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939; Y10T137/2012; Y10T137/2496; Y10T137/2514; Y10T137/2521
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
IN AN OXYGEN SUPPLY SYSTEM HAVING A MIXING UNIT FOR PROPORTIONING OXYGEN AND AIR, THE COMBINATION OF A CASING, A COMMON MIXING CHAMBER WITHIN SAID CASING, A FIRST INLET FOR THE SUPPLY OF OXYGEN TO SAID CHAMBER AND A SECOND INLET FOR THE SUPPLY OF AIR TO SAID CHAMBER, A FIRST METERING VALVE FOR CONTROLLING SAID SUPPLY OF OXYGEN, A SECOND METERING VALVE FOR CONTROLLING SAID SUPPLY OF AIR, MEANS RESPONSIVE TO AMBIENT PRESSURE OPERATIVE TO ACTUATE SAID FIRST AND SECOND METERING VALVES TO SIMULTANEOUSLY INCREASE THE RATIO OF OXYGEN AND DECREASE THE RATIO OF AIR WITH FALLING AMBIENT PRESSURE, AND TO SIMULTANEOUSLY DECREASE THE RATIO OF OXYGEN AND INCREASE THE RATIO OF AIR WITH RISING AMBIENT PRESSURE, CONTROL VALVE MEANS IN SAID INLET FOR THE SUPPLY OF OXYGEN, AND ACTUATING MEANS FOR SAID CONTROL VALVE MEANS, SAID ACTUATING MEANS BEING RESPONSIVE TO THE PRESSURE DIFFERENTIAL BETWEEN THE PRESSURE OF SAID SUPPLY OF AIR AND THE PRESSURE OF SAID SUPPLY OF OXYGEN AT A LOCATION UPSTREAM OF SAID CONTROL VALVE MEANS.
Claim 2
Dependent Claim
171 words
IN AN OXYGEN SUPPLY SYSTEM HAVING A MIXING UNIT FOR PROPORTIONING OXYGEN AND AIR, THE COMBINATION OF A CASING, A COMMON MIXING CHAMBER WITHIN SAID CASING, A FIRST INLET FOR THE SUPPLY OF OXYGEN TO SAID CHAMBER AND A SECOND INLET FOR THE SUPPLY OF AIR TO SAID CHAMBER, A FIRST METERING VALVE FOR CONTROLLING SAID SUPPLY OF OXYGEN, A SECOND METERING VALVE FOR CONTROLLING SAID SUPPLY OF AIR, MEANS RESPONSIVE TO AMBIENT PRESSURE OPERATIVE TO ACTUATE SAID FIRST AND SECOND METERING VALVES TO SIMULTANEOUSLY INCREASE THE RATIO OF OXYGEN AND DECREASE THE RATIO OF AIR WITH FALLING AMBIENT PRESSURE, AND TO SIMULTANEOUSLY DECREASE THE RATIO OF OXYGEN AND INCREASE THE RATIO OF AIR WITH RISING AMBIENT PRESSURE, CONTROL VALVE MEANS IN SAID INLET FOR THE SUPPLY OF OXYGEN, AND ACTUATING MEANS FOR SAID CONTROL VALVE MEANS, SAID ACTUATING MEANS BEING RESPONSIVE TO THE PRESSURE DIFFERENTIAL BETWEEN THE PRESSURE OF SAID SUPPLY OF AIR AND THE PRESSURE OF SAID SUPPLY OF OXYGEN AT A LOCATION UPSTREAM OF SAID CONTROL VALVE MEANS.
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) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |