US3138154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breathing device
Assignee: Svenska AB Gasaccumulator
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Filing: 1961-02-23
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Granted: 1964-06-23
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Expires: 1981-02-23
Abstract
No abstract record available.
Inventors
- 👤 Hedberg Oscar Emanuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:56
CPC Classifications
A; A62; A62B; A62B9/00; A62B9/02; A62B9/022; B; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/22; B63C11/2227; Y; Y10; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939; Y10T137/2012
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
BREATHING APPARATUS COMPRISING A CHAMBER HAVING AT ONE END A VALVE CONNECTED TO A SOURCE OF BREATHABLE GAS, SAID VALVE HAVING A MOVABLE AND A FIXED PART FOR CONTROLLING GAS DELIVERED FROM THE SOURCE TO THE CHAMBER INTERIOR, A MEMBRANE FORMING A PART OF THE CHAMBER WALL RESPONSIVE TO THE DIFFERENCE BETWEEN THE PRESSURE OF THE AMBIENT MEDIUM AND THE PRESSURE WITHIN SAID CHAMBER, LEVER MEANS CONNECTING SAID MEMBRANE AND SAID MOVABLE PART FOR CONTROLLING THE INHALATION VALVE BY MEANS OF SAID MEMBRANE, GAS OUTLET MEANS FOR SUPPLYING GAS FROM THE CHAMBER INTERIOR TO A WEARER, A CLOSURE MEMBER OF RESILIENT MATERIAL MOUNTED AT ONE END OF SAID MOVABLE PART FACING SAID FIXED PART, SAID CLOSURE MEMBER TIGHTLY ABUTTING SAID FIXED PART IN THE CLOSED POSITION OF THE VALVE, SAID MOVABLE PART FURTHER HAVING A PORTION OF NON-RESILIENT MATERIAL ABUTTING SAID FIXED PART WHEN THE VALVE IS CLOSED, THE DISTANCE BETWEEN SAID CLOSURE MEMBER AND SAID FIXED PART IN THE OPEN POSITION OF THE VALVE BEING SMALLER THAN THE DISTANCE BETWEEN SAID PORTION OF NON-RESILIENT MATERIAL AND SAID FIXED PART OF THE VALVE.
Claim 2
Dependent Claim
183 words
BREATHING APPARATUS COMPRISING A CHAMBER HAVING AT ONE END A VALVE CONNECTED TO A SOURCE OF BREATHABLE GAS, SAID VALVE HAVING A MOVABLE AND A FIXED PART FOR CONTROLLING GAS DELIVERED FROM THE SOURCE TO THE CHAMBER INTERIOR, A MEMBRANE FORMING A PART OF THE CHAMBER WALL RESPONSIVE TO THE DIFFERENCE BETWEEN THE PRESSURE OF THE AMBIENT MEDIUM AND THE PRESSURE WITHIN SAID CHAMBER, LEVER MEANS CONNECTING SAID MEMBRANE AND SAID MOVABLE PART FOR CONTROLLING THE INHALATION VALVE BY MEANS OF SAID MEMBRANE, GAS OUTLET MEANS FOR SUPPLYING GAS FROM THE CHAMBER INTERIOR TO A WEARER, A CLOSURE MEMBER OF RESILIENT MATERIAL MOUNTED AT ONE END OF SAID MOVABLE PART FACING SAID FIXED PART, SAID CLOSURE MEMBER TIGHTLY ABUTTING SAID FIXED PART IN THE CLOSED POSITION OF THE VALVE, SAID MOVABLE PART FURTHER HAVING A PORTION OF NON-RESILIENT MATERIAL ABUTTING SAID FIXED PART WHEN THE VALVE IS CLOSED, THE DISTANCE BETWEEN SAID CLOSURE MEMBER AND SAID FIXED PART IN THE OPEN POSITION OF THE VALVE BEING SMALLER THAN THE DISTANCE BETWEEN SAID PORTION OF NON-RESILIENT MATERIAL AND SAID FIXED PART OF THE VALVE.
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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |