Patent US3009243A successfully refreshed from Google Patents.
US3009243A
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Method of filling submersible pump motor chambers
Assignee: KENCO PUMP DIVISIONS OF AM
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Filing: 1958-10-14
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Granted: 1961-11-21
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Expires: 1978-10-14
Abstract
No abstract record available.
Inventors
- 👤 Fred E Tutthill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:24
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/132; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49236; Y10T29/49758; Y10T29/49764; Y10T29/49771
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
THE METHOD OF FILLING A SUBMERSIBLE PUMP MOTOR CHAMBER HAVING A MOTOR AND SHAFT WITH A RUNNING SEAL EXTENDING THROUGH THE WALL THEREOF COMPRISING THE STEPS OF PRESSURIZING AN AIR FILLED SUBMERSIBLE PUMP MOTOR CHAMBER WITH DICHLORODIFLUOROMETHANE, OPERATING THE MOTOR AND CHAMBER UNDER WATER FOR A PREDETERMINED PERIOD OF TIME TO LAP IN THE SEAL, INSPECTING THE PUMP CHAMBER WITH A HALOGEN TYPE LEAK DETECTOR TO DETECT ANY LEAKS IN THE MOTOR CHAMBER, EVACUATING THE DICHLORODIFLUOROMETHANE AND AIR FROM THE MOTOR CHAMBER, AND FILLING THE MOTOR CHAMBER WITH EXTRA DRY NITROGEN TO A PRESSURE AT LEAST EQUAL TO THE PRESSURE WHICH WILL BE IMPOSED ON THE EXTERIOR OF THE PUMP AND MOTOR CHAMBER DURING USE.
Claim 2
Independent Claim
115 words
THE METHOD OF FILLING A SUBMERSIBLE PUMP MOTOR CHAMBER HAVING A MOTOR AND SHAFT WITH A RUNNING SEAL EXTENDING THROUGH THE WALL THEREOF COMPRISING THE STEPS OF PRESSURIZING AN AIR FILLED SUBMERSIBLE PUMP MOTOR CHAMBER WITH DICHLORODIFLUOROMETHANE, OPERATING THE MOTOR AND CHAMBER UNDER WATER FOR A PREDETERMINED PERIOD OF TIME TO LAP IN THE SEAL, INSPECTING THE PUMP CHAMBER WITH A HALOGEN TYPE LEAK DETECTOR TO DETECT ANY LEAKS IN THE MOTOR CHAMBER, EVACUATING THE DICHLORODIFLUOROMETHANE AND AIR FROM THE MOTOR CHAMBER, AND FILLING THE MOTOR CHAMBER WITH EXTRA DRY NITROGEN TO A PRESSURE AT LEAST EQUAL TO THE PRESSURE WHICH WILL BE IMPOSED ON THE EXTERIOR OF THE PUMP AND MOTOR CHAMBER DURING USE.
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) | 1964-11-20 | 1965-05-22 | 1965-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-20 | 1969-05-22 | 1969-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-20 | 1973-05-22 | 1973-11-21 | $7700.00 | Window Closed / Lapsed |