US3129947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid metal freeze-type seal
Assignee: North American Aviation Corp
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Filing: 1960-12-23
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Granted: 1964-04-21
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Expires: 1980-12-23
Abstract
No abstract record available.
Inventors
- 👤 Frederick O Streck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:17
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/40; F16J15/403; Y; Y10; Y10S; Y10S277/00; Y10S277/93; Y10S277/931; Y10S277/933
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A FREEZE-TYPE SHAFT SEAL FOR A LIQUID METAL SYSTEM, COMPRISING CHANNEL MEANS FRO RECEIVING SHAFT LEAKAGE LIQUID METAL FROM SAID SYSTEM CONTIGUOUS TO THE SHAFT AND PARALLEL TO ITS AXIS; MEANS FOR FREEZING A FIRST PORTION OF THE SHAFT LEAKAGE IN SAID CHANNEL AROUND SAID SHAFT; AND MEANS FOR MAINTAINING A SECOND PORTION OF SAID SHAFT LEAKAGE IN SAID CHANNEL IN THE MOLTEN STATE, SAID SECOND PORTION BEING BETWEEN THE FROZEN REGION AND THE SHAFT SOURCE OF LIQUID METAL LEAKAGE.
Claim 2
Dependent Claim
80 words
A FREEZE-TYPE SHAFT SEAL FOR A LIQUID METAL SYSTEM, COMPRISING CHANNEL MEANS FRO RECEIVING SHAFT LEAKAGE LIQUID METAL FROM SAID SYSTEM CONTIGUOUS TO THE SHAFT AND PARALLEL TO ITS AXIS; MEANS FOR FREEZING A FIRST PORTION OF THE SHAFT LEAKAGE IN SAID CHANNEL AROUND SAID SHAFT; AND MEANS FOR MAINTAINING A SECOND PORTION OF SAID SHAFT LEAKAGE IN SAID CHANNEL IN THE MOLTEN STATE, SAID SECOND PORTION BEING BETWEEN THE FROZEN REGION AND THE SHAFT SOURCE OF LIQUID METAL LEAKAGE.
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) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |