Patent US3130701A successfully refreshed from Google Patents.
US3130701A
Expired / Lapsed
US
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Icebreakers
Assignee: Individual
•
Filing: 1962-08-14
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Granted: 1964-04-28
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Expires: 1982-08-14
Abstract
No abstract record available.
Inventors
- 👤 Poul O Langballe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:42
CPC Classifications
B; B63; B63B; B63B35/00; B63B35/08; B63B35/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN AN ICEBREAKER A SOURCE OF COMPRESSED AIR, A SUBMERSIBLE VESSEL INCLUDING A REINFORCED ICEBREAKING SHELL AT THE UPPER FACE THEREOF AND AN EXPANSIBLE AND INFLATABLE BOTTOM, MEANS FOR AUTOMATICALLY INFLATING SAID BOTTOM WHEN SAID ICEBREAKING SHELL IS SUBJECTED TO THE PRESSURE OF THE ICE, SAID MEANS FOR AUTOMATICALLY INFLATING SAID BOTTOM COMPRISING A COMPRESSIBLE SPRING LOADED FEELER ELEMENT IN SAID ICEBREAKING SHELL, A SHIFT VALVE OPERABLY ASSOCIATED WITH SAID FEELER ELEMENT AND CONNECTED WITH SAID SOURCE OF COMPRESSED AIR AND SAID INFLATABLE BODY FOR INFLATING THE EXPANSIBLE BOTTOM WHEN THE VALVE IS MOVED INTO ONE POSITION BY DEPRESSION OF THE FEELER ELEMENT AND TO EVACUATE SAID BOTTOM WHEN THE VALVE IS MOVED INTO ANOTHER POSITION BY RELEASE OF THE PRESSURE ON THE FEELER ELEMENT.
Claim 2
Dependent Claim
125 words
IN AN ICEBREAKER A SOURCE OF COMPRESSED AIR, A SUBMERSIBLE VESSEL INCLUDING A REINFORCED ICEBREAKING SHELL AT THE UPPER FACE THEREOF AND AN EXPANSIBLE AND INFLATABLE BOTTOM, MEANS FOR AUTOMATICALLY INFLATING SAID BOTTOM WHEN SAID ICEBREAKING SHELL IS SUBJECTED TO THE PRESSURE OF THE ICE, SAID MEANS FOR AUTOMATICALLY INFLATING SAID BOTTOM COMPRISING A COMPRESSIBLE SPRING LOADED FEELER ELEMENT IN SAID ICEBREAKING SHELL, A SHIFT VALVE OPERABLY ASSOCIATED WITH SAID FEELER ELEMENT AND CONNECTED WITH SAID SOURCE OF COMPRESSED AIR AND SAID INFLATABLE BODY FOR INFLATING THE EXPANSIBLE BOTTOM WHEN THE VALVE IS MOVED INTO ONE POSITION BY DEPRESSION OF THE FEELER ELEMENT AND TO EVACUATE SAID BOTTOM WHEN THE VALVE IS MOVED INTO ANOTHER POSITION BY RELEASE OF THE PRESSURE ON THE FEELER ELEMENT.
References Cited (Backward Citations)
US1321383A
Cited
US1500000A
Cited
US658265A
Cited
US808634A
Cited
US2277175A
Cited
US2722021A
Cited
FR1148743A
Cited
US3009434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |