Patent JPS5217837A successfully refreshed from Google Patents.
Patent US6254435B1 successfully refreshed from Google Patents.
US3105632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure centrifugal compressor
Assignee: Dresser Industries Inc
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Filing: 1960-03-14
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Granted: 1963-10-01
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Expires: 1980-03-14
Abstract
No abstract record available.
Inventors
- 👤 Eric W Tanzberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:39
CPC Classifications
F; F04; F04D; F04D25/00; F04D25/02; F04D25/024; F04D17/00; F04D17/08; F04D17/10; F04D17/12; F04D17/122; F04D17/125; F04D29/00; F04D29/05; F04D29/051; F04D29/0513; F04D29/0516
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN A CENTRIFUGAL COMPRESSOR, THE COMBINATION COMPRISING A CASING HAVING END HEADS, A SHAFT JOURNALLED IN BEARINGS ON SAID END HEADS, A SEAL ASSEMBLY SURROUNDING SAID SHAFT AND ARRANGED INWARDLY OF THE JOURNAL BEARING AT EACH END THEREOF, A PLURALITY OF IMPELLERS FAST TO SAID SHAFT AND ARRANGED BETWEEN SAID SEAL ASSEMBLIES TO PROVIDE MULTI-STAGE COMPRESSION, A POWER-RECOVERY RADIALLY INWARD FLOW TYPE TURBINE WHEEL FAST TO SAID SHAFT AND ARRANGED BETWEEN THE LAST STAGE IMPELLER AND THE CORRESPONDING SEAL ASSEMBLY AND MEANS FOR BY-PASSING TO SAID WHEEL SOME OF THE COMPRESSED FLUID DISCHARGED BY SAID LAST STAGE IMPELLER TO BE EXPANDED WHILE FLOWING THROUGH SAID WHEEL AND THEREBY DRIVE THE SAME, THE EXPANDED FLUID DISCHARGED BY SAID WHEEL BEING DIRECTED TOWARD SAID CORRESPONDING SEAL ASSEMBLY.
Claim 2
Dependent Claim
125 words
IN A CENTRIFUGAL COMPRESSOR, THE COMBINATION COMPRISING A CASING HAVING END HEADS, A SHAFT JOURNALLED IN BEARINGS ON SAID END HEADS, A SEAL ASSEMBLY SURROUNDING SAID SHAFT AND ARRANGED INWARDLY OF THE JOURNAL BEARING AT EACH END THEREOF, A PLURALITY OF IMPELLERS FAST TO SAID SHAFT AND ARRANGED BETWEEN SAID SEAL ASSEMBLIES TO PROVIDE MULTI-STAGE COMPRESSION, A POWER-RECOVERY RADIALLY INWARD FLOW TYPE TURBINE WHEEL FAST TO SAID SHAFT AND ARRANGED BETWEEN THE LAST STAGE IMPELLER AND THE CORRESPONDING SEAL ASSEMBLY AND MEANS FOR BY-PASSING TO SAID WHEEL SOME OF THE COMPRESSED FLUID DISCHARGED BY SAID LAST STAGE IMPELLER TO BE EXPANDED WHILE FLOWING THROUGH SAID WHEEL AND THEREBY DRIVE THE SAME, THE EXPANDED FLUID DISCHARGED BY SAID WHEEL BEING DIRECTED TOWARD SAID CORRESPONDING SEAL ASSEMBLY.
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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) | 1966-09-30 | 1967-04-01 | 1967-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-30 | 1971-04-01 | 1971-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-30 | 1975-04-01 | 1975-10-01 | $7700.00 | Window Closed / Lapsed |