Patent US3263933A successfully refreshed from Google Patents.
US3263933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duct systems
Assignee: Michigan Oven Co
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Filing: 1964-07-29
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Granted: 1966-08-02
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Expires: 1984-07-29
Abstract
No abstract record available.
Inventors
- 👤 Samuel R Porwancher
- 👤 Kenneth W Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:04
CPC Classifications
F; F26; F26B; F26B21/00; F26B21/50; F26B21/55
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A DUCT SYSTEM FOR DEVELOPING A HIGH-VELOCITY STREAM OF FLUID OF UNIFORM VELOCITY COMPRISING: AN ELONGATED SUPPLY DUCT; MEANS FOR SUPPLYING FLUID UNDER PRESSURE AT MODERATE VELOCITY INTO ONE END OF SAID SUPPLY DUCT; AN ELONGATED ACCELERATION DUCT, HAVING AN INLET PORTION ALONG ONE SIDE AND AN OUTLET PORTION ALONG THE OPPOSITE SIDE, SAID ACCELERATION DUCT PROGRESSIVELY DECREASING IN WIDTH FROM SAID INLET PORTION TO SAID OUTLET PORTION TO PROGRESSIVELY INCREASE THE VELOCITY OF FLUID FLOWING THERETHROUGH; ONE OF SAID DUCTS BEING MOUNTED WITHIN THE OTHER, THE INNERMOST DUCT HAVING OPENING MEANS INTERCONNECTING SAID SUPPLY DUCT WITH THE INLET PORTION OF SAID ACCELERATION DUCT; AND DISCHARGE MEANS AFFORDING AN ELONGATED NARROW DELIVERY SLOT CONNECTED TO SAID OUTLET PORTION OF SAID ACCELERATION DUCT TO DELIVER A UNIFORM HIGH-VELOCITY STREAM OF FLUID OUTWARDLY OF SAID ACCELERATION DUCT ALONG THE LENGTH OF THAT DUCT.
Claim 2
Dependent Claim
141 words
A DUCT SYSTEM FOR DEVELOPING A HIGH-VELOCITY STREAM OF FLUID OF UNIFORM VELOCITY COMPRISING: AN ELONGATED SUPPLY DUCT; MEANS FOR SUPPLYING FLUID UNDER PRESSURE AT MODERATE VELOCITY INTO ONE END OF SAID SUPPLY DUCT; AN ELONGATED ACCELERATION DUCT, HAVING AN INLET PORTION ALONG ONE SIDE AND AN OUTLET PORTION ALONG THE OPPOSITE SIDE, SAID ACCELERATION DUCT PROGRESSIVELY DECREASING IN WIDTH FROM SAID INLET PORTION TO SAID OUTLET PORTION TO PROGRESSIVELY INCREASE THE VELOCITY OF FLUID FLOWING THERETHROUGH; ONE OF SAID DUCTS BEING MOUNTED WITHIN THE OTHER, THE INNERMOST DUCT HAVING OPENING MEANS INTERCONNECTING SAID SUPPLY DUCT WITH THE INLET PORTION OF SAID ACCELERATION DUCT; AND DISCHARGE MEANS AFFORDING AN ELONGATED NARROW DELIVERY SLOT CONNECTED TO SAID OUTLET PORTION OF SAID ACCELERATION DUCT TO DELIVER A UNIFORM HIGH-VELOCITY STREAM OF FLUID OUTWARDLY OF SAID ACCELERATION DUCT ALONG THE LENGTH OF THAT DUCT.
References Cited (Backward Citations)
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Cited
US1759231A
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US1751960A
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US2624625A
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US2919861A
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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) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |