US3907463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submersible pumping unit
Assignee: Individual
•
Filing: 1973-07-05
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Granted: 1975-09-23
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Expires: 1993-07-05
Abstract
Abstract A submersible pumping unit having a reversible pump driven directly by a rotary hydraulic motor. Bearings for the pump shaft are lubricated by hydraulic liquid from this motor and are capable of taking up end thrusts in either direction. A hose on the outside of the casing for the pump and motor is inflated by hydraulic liquid from the motor to expand radially outward into sealing engagement with a well casing. This pumping unit may be suspended underground to pump water either vertically or horizontally.
Inventors
- 👤 J Marlin Eller
- 👤 J David Eller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:17
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/02; F04D13/06; F04D13/08; F04D13/083; F04B; F04B47/00; F04B47/06; F04B47/08; F04D13/04; F04D13/046; F04D13/10; F04D3/00; F04D3/005
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
In a submersible pumping unit having a hydraulic motor driving a pump, and an annular casing extending circumferentially around the motor and pump, the improvement which comprises: inflatable, radially expandable diaphragm means extending circumferentially around the outside of said casing; and means for passing hydraulic liquid from the hydraulic output side of said motor into said diaphragm means to inflate the latter so as to expand radially outward for sealing engagement with a well casing which receives said motor, pump and casing.
Claim 2
Dependent Claim
82 words
In a submersible pumping unit having a hydraulic motor driving a pump, and an annular casing extending circumferentially around the motor and pump, the improvement which comprises: inflatable, radially expandable diaphragm means extending circumferentially around the outside of said casing; and means for passing hydraulic liquid from the hydraulic output side of said motor into said diaphragm means to inflate the latter so as to expand radially outward for sealing engagement with a well casing which receives said motor, pump and casing.
Claim 3
Dependent Claim
22 words
A pumping unit according to claim 1, wherein said diaphragm means is a hose wrapped circumferentially around the outside of said casing.
Claim 4
Dependent Claim
52 words
A pumping unit according to claim 1, and further comprising: a rotary connecting shaft arrangement coupling said motor to said pump; bearing means supporting said connecting shaft arrangement for rotation; and means for passing hydraulic liquid from the hydraulic output side of said motor to said bearing means to lubricate the latter.
Claim 5
Dependent Claim
27 words
A pumping unit according to claim 3, wherein said bearing means comprises at least two combined radial and axial thrust bearings which withstand opposite axial thrusts, respectively.
Claim 6
Dependent Claim
94 words
A pumping unit according to claim 2, and further comprising: annular housing means disposed inside said casing and sealingly engaged axially between said motor and said pump; a connecting shaft arrangement extending axially from said motor to said pump and coupling the motor rotationally to the pump; bearing means inside said housing means supporting said connecting shaft arrangement for rotation; and conduit means inside said casing means extending outside the motor from the hydraulic output side of the latter to the interior of said housing means to pass hydraulic liquid to said bearing means.
Claim 7
Dependent Claim
27 words
A pumping unit according to claim 5, wherein said bearing means comprises at least two combined radial and axial thrust bearings which withstand opposite axial thrusts, respectively.
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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |