US3826936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible submergible electric motor
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1973-12-06
•
Granted: 1974-07-30
•
Expires: 1993-12-06
Abstract
Abstract A flexible submergible electric motor is provided which may be used in deviated deep wells. The motor comprises successive rigid sections flexibly interconnected by coupling means which permit relative angular adjustment of the adjacent sections without relative axial rotation.
Inventors
- 👤 Rourke J O
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:20
CPC Classifications
H; H02; H02K; H02K7/00; H02K7/003; H02K5/00; H02K5/04; H02K5/12; H02K5/132; Y; Y10; Y10S; Y10S415/00; Y10S415/901
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
117 words
A flexible submergible motor comprising a plurality of housing sections in series, each housing section having a rotary shaft section extending along the axis thereof, with a rotor fixed to each shaft section and with a cooperating stator fixed to each housing section, each shaft section and each housing section being rigid, and each shaft section being coupled to the adjacent shaft section and each housing section being coupled to the adjacent housing section by flexible coupling means for permitting angular adjustment of each housing section and the associated shaft section relative to the adjacent housing sections and shaft sections, respectively, but for restricting relative axial rotation of adjacent housing sections and of adjacent shaft sections, respectively.
Claim 2
Dependent Claim
117 words
A flexible submergible motor comprising a plurality of housing sections in series, each housing section having a rotary shaft section extending along the axis thereof, with a rotor fixed to each shaft section and with a cooperating stator fixed to each housing section, each shaft section and each housing section being rigid, and each shaft section being coupled to the adjacent shaft section and each housing section being coupled to the adjacent housing section by flexible coupling means for permitting angular adjustment of each housing section and the associated shaft section relative to the adjacent housing sections and shaft sections, respectively, but for restricting relative axial rotation of adjacent housing sections and of adjacent shaft sections, respectively.
Claim 3
Dependent Claim
16 words
A flexible motor in accordance with claim 1, wherein said coupling means comprises a universal joint.
Claim 4
Dependent Claim
16 words
A flexible motor in accordance with claim 2, wherein said universal joint comprises a ball-and-socket joint.
Claim 5
Dependent Claim
37 words
A flexible motor in accordance with claim 1, further comprising electrical conductors carried by said adjacent housing sections and wherein said coupling means comprises means for flexibly interconnecting the ends of said conductors between adjacent housing sections.
Claim 6
Dependent Claim
32 words
A flexible motor in accordance with claim 4, wherein said last-mentioned means comprises electrically conductive coil springs, and further comprising telescoping insulating joints for insulating said coil springs from said housing sections.
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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) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |