Patent US2619870A successfully refreshed from Google Patents.
Patent US3171355A successfully refreshed from Google Patents.
US3171355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well pump
Assignee: Dresser Industries Inc
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Filing: 1963-03-14
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Granted: 1965-03-02
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Expires: 1983-03-14
Abstract
No abstract record available.
Inventors
- 👤 Jacob W Harris
- 👤 Richard C Farnham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:22
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/02; F04D13/06; F04D13/08; F04D13/10; F04D13/04; F04D13/066; F05; F05B; F05B2240/00; F05B2240/50; F05B2240/52; Y; Y10; Y10S; Y10S415/00; Y10S415/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
IN A TURBO-PUMP FOR INSTALLATION IN WELLS, APPARATUS COMPRISING: A HOUSING ADAPTED TO BE LOWERED INTO A WELL; A TURBINE IN SAID HOUSING HAVING RUNNERS ADAPTED TO BE DRIVEN BY POWER FLUID INTRODUCED THEREINTO; INLET MEANS FOR INTRODUCING SUCH POWER FLUID INTO SAID HOUSING AND DRIVINGLY TO SAID RUNNERS; A CENTRIFUGAL PUMP IN SAID HOUSING HAVING IMPELLERS ADAPTED TO PUMP FLUID FROM SUCH WELL; SHAFT MEANS UPON WHICH SAID RUNNERS AND IMPELLERS ARE FIXED FOR SUPPORT AND ROTATION ABOUT A COMMON AXIS; AND MEANS FOR BALANCING AXIAL THRUST IN SAID SHAFT INCLUDING: A CYLINDRICAL OUTER BEARING BODY, A CYLINDRICAL INNER BEARING BODY ROTATABLE AND AXIALLY SILDABLE IN SAID OUTER BEARING BODY, MEANS FIXING ONE OF SAID BEARING BODIES IN SAID HOUSING AND THE OTHER BEARING BODY TO SAID SHAFT, DUCT MEANS IN SAID HOUSING INTERCONNECTING SAID INLET MEANS AND SAID BEARING BODIES TO APPLY A DIFFERENTIAL FLUID PRESSURE ACROSS SAID INNER BEARING BODY IN SAID OUTER BEARING BODY, WHEREBY TO APPLY IN AXIAL BALANCING FORCE TO SAID SHAFT, AND MEANS, ACTUATABLE BY AXIAL DISPLACEMENT OF SAID INNER AND OUTER BEARING BODIES FROM A PREDETERMINED POSITION RELATIVE TO ONE ANOTHER TO VARY THE SAID DIFFERENTIAL PRESSURE.
Claim 2
Dependent Claim
195 words
IN A TURBO-PUMP FOR INSTALLATION IN WELLS, APPARATUS COMPRISING: A HOUSING ADAPTED TO BE LOWERED INTO A WELL; A TURBINE IN SAID HOUSING HAVING RUNNERS ADAPTED TO BE DRIVEN BY POWER FLUID INTRODUCED THEREINTO; INLET MEANS FOR INTRODUCING SUCH POWER FLUID INTO SAID HOUSING AND DRIVINGLY TO SAID RUNNERS; A CENTRIFUGAL PUMP IN SAID HOUSING HAVING IMPELLERS ADAPTED TO PUMP FLUID FROM SUCH WELL; SHAFT MEANS UPON WHICH SAID RUNNERS AND IMPELLERS ARE FIXED FOR SUPPORT AND ROTATION ABOUT A COMMON AXIS; AND MEANS FOR BALANCING AXIAL THRUST IN SAID SHAFT INCLUDING: A CYLINDRICAL OUTER BEARING BODY, A CYLINDRICAL INNER BEARING BODY ROTATABLE AND AXIALLY SILDABLE IN SAID OUTER BEARING BODY, MEANS FIXING ONE OF SAID BEARING BODIES IN SAID HOUSING AND THE OTHER BEARING BODY TO SAID SHAFT, DUCT MEANS IN SAID HOUSING INTERCONNECTING SAID INLET MEANS AND SAID BEARING BODIES TO APPLY A DIFFERENTIAL FLUID PRESSURE ACROSS SAID INNER BEARING BODY IN SAID OUTER BEARING BODY, WHEREBY TO APPLY IN AXIAL BALANCING FORCE TO SAID SHAFT, AND MEANS, ACTUATABLE BY AXIAL DISPLACEMENT OF SAID INNER AND OUTER BEARING BODIES FROM A PREDETERMINED POSITION RELATIVE TO ONE ANOTHER TO VARY THE SAID DIFFERENTIAL PRESSURE.
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) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |