US3374942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pressure transformer
Assignee: BBC Brown Boveri AG Germany
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Filing: 1966-08-08
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Granted: 1968-03-26
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Expires: 1986-08-08
Abstract
No abstract record available.
Inventors
- 👤 Seippel Claude
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:15
CPC Classifications
F; F04; F04F; F04F13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN A ROTARY PRESSURE TRANSFORMER COMPRISING A CIRCULAR ARRAY OF ELONGATED CELLS IN WHICH ENERGY CONVERSIONS ACCOMPANIED BY COMPRESSION AND RAREFACTION WAVES ARE PRODUCED BY OPENING AND CLOSING OF THE CELL ENDS IN ROTATION IN CONJUCTION WITH CONNECTION OF THE CELL ENDS WHEN OPENED WITH GAS INFLOW AND OUTFLOW CHANNELS, THE IMPROVEMENT WHEREIN SAID CELLS EXCEPT FOR THE OPPOSITE END PORTIONS THEREOF HAVE A CROSS-SECTION FAVORABLE TO THE FLOW OF THE GAS, AND SAID END PORTIONS OF SAID CELLS ARE CONSTRICTED IN A CIRCUMFERENTIAL DIRECTION AND ENLARGED IN A DIRECTION PERPENDICULARLY THERETO.
Claim 2
Dependent Claim
92 words
IN A ROTARY PRESSURE TRANSFORMER COMPRISING A CIRCULAR ARRAY OF ELONGATED CELLS IN WHICH ENERGY CONVERSIONS ACCOMPANIED BY COMPRESSION AND RAREFACTION WAVES ARE PRODUCED BY OPENING AND CLOSING OF THE CELL ENDS IN ROTATION IN CONJUCTION WITH CONNECTION OF THE CELL ENDS WHEN OPENED WITH GAS INFLOW AND OUTFLOW CHANNELS, THE IMPROVEMENT WHEREIN SAID CELLS EXCEPT FOR THE OPPOSITE END PORTIONS THEREOF HAVE A CROSS-SECTION FAVORABLE TO THE FLOW OF THE GAS, AND SAID END PORTIONS OF SAID CELLS ARE CONSTRICTED IN A CIRCUMFERENTIAL DIRECTION AND ENLARGED IN A DIRECTION PERPENDICULARLY THERETO.
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) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |