Patent US3285183A successfully refreshed from Google Patents.
US3285183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control assembly for oil well pump
Assignee: HAGANHEM CO Inc
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Filing: 1964-12-01
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Granted: 1966-11-15
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Expires: 1984-12-01
Abstract
No abstract record available.
Inventors
- 👤 Oscar O Hembree
- 👤 Clyde E Yost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:09
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/12; F; F04; F04D; F04D15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
198 words
A DEVICE FOR CONTROLLING OPERATION OF A PUMP MOTOR FOR AUTOMATICALLY ACTIVATING A PUMP WHEN A FLUID LEVEL REACHES A PREDETERMINED HIGH POINT AND AUTOMATICALLY DEACTIVATING THE PUMP WHEN THE FLUID LEVEL REACHES A LOW POINT COMPRISING A TUBULAR CASING HAVING A PASSAGEWAY IN THE BOTTOM THEREOF FOR COMMUNICATING WITH A FLUID SUPPLY, THE UPPER END OF SAID CASING BEING COMMUNICATED WITH UPPER INLET MEANS FOR COMMUNICATION WITH FLUID WHEN THE FLUID REACHES A PREDETERMINED HIGH LEVEL, A NORMALLY CLOSED VALVE IN SAID PASSAGEWAY SO THAT PRECLUDE INLET OF FLUID THROUGH THE PASSAGEWAY SO THAT FLUID WILL HAVE TO ENTER THE INLET MEANS, AND SWITCH MEANS IN SAID CASING RESPONSIVE TO INFLOW OF FLUID INTO THE UPPER INLET MEANS FOR CLOSING A CIRCUIT TO OPERATE A PUMP MOTOR FOR PUMPING THE FLUID, AND MEANS OPENING SAID VALVE IN THE PASSAGEWAY IN THE CASING IN RESPONSE TO OPERATION OF THE PUMP MOTOR FOR OPENING THE VALVE IN THE CASING WHEREBY FLUID IN THE CASING WILL DRAIN OUT THROUGH THE PASSAGEWAY AS THE FLUID LEVEL LOWERS TO A PREDETERMINED POINT THEREBY OPENING THE SWITCH MEANS FOR STOPPING THE PUMP MOTOR AND CLOSING THE VALVE IN THE PASSAGEWAY IN THE CASING.
Claim 2
Independent Claim
198 words
A DEVICE FOR CONTROLLING OPERATION OF A PUMP MOTOR FOR AUTOMATICALLY ACTIVATING A PUMP WHEN A FLUID LEVEL REACHES A PREDETERMINED HIGH POINT AND AUTOMATICALLY DEACTIVATING THE PUMP WHEN THE FLUID LEVEL REACHES A LOW POINT COMPRISING A TUBULAR CASING HAVING A PASSAGEWAY IN THE BOTTOM THEREOF FOR COMMUNICATING WITH A FLUID SUPPLY, THE UPPER END OF SAID CASING BEING COMMUNICATED WITH UPPER INLET MEANS FOR COMMUNICATION WITH FLUID WHEN THE FLUID REACHES A PREDETERMINED HIGH LEVEL, A NORMALLY CLOSED VALVE IN SAID PASSAGEWAY SO THAT PRECLUDE INLET OF FLUID THROUGH THE PASSAGEWAY SO THAT FLUID WILL HAVE TO ENTER THE INLET MEANS, AND SWITCH MEANS IN SAID CASING RESPONSIVE TO INFLOW OF FLUID INTO THE UPPER INLET MEANS FOR CLOSING A CIRCUIT TO OPERATE A PUMP MOTOR FOR PUMPING THE FLUID, AND MEANS OPENING SAID VALVE IN THE PASSAGEWAY IN THE CASING IN RESPONSE TO OPERATION OF THE PUMP MOTOR FOR OPENING THE VALVE IN THE CASING WHEREBY FLUID IN THE CASING WILL DRAIN OUT THROUGH THE PASSAGEWAY AS THE FLUID LEVEL LOWERS TO A PREDETERMINED POINT THEREBY OPENING THE SWITCH MEANS FOR STOPPING THE PUMP MOTOR AND CLOSING THE VALVE IN THE PASSAGEWAY IN THE CASING.
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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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |