Patent US3626221A successfully refreshed from Google Patents.
US3626221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor with permanently lubricated bearings
Assignee: AEM MANUFACTURING Corp C/O JOHN L MAIER JR 1040 EAST STATE STREET ROCKFORD ILLINOIS 61108 A ILLINOIS CORP
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Filing: 1970-09-14
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Granted: 1971-12-07
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Expires: 1990-09-14
Abstract
Abstract The rotor of a shaded-pole motor includes a central sleeve supported on a stationary shaft by axially spaced inner and outer bearings which are lubricated by an oil impregnated tubular liner telescoped into the sleeve and sandwiched between the two bearings. An oil storage ring disposed in contact with the outboard face of the inner bearing includes angularly spaced fingers which engage the shaft to prevent oil from leaking out of the sleeve and along the shaft. An additional ring is disposed in contact with the outboard face of the outer bearing to return oil to such bearing.
Inventors
- 👤 Gordon R Anderson
- 👤 Gordon R Anderson Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:59
CPC Classifications
F; F04; F04D; F04D25/00; F04D25/02; F04D25/06; F04D25/0606; H; H02; H02K; H02K17/00; H02K17/02; H02K17/04; H02K17/10; H02K5/00; H02K5/04; H02K5/16; H02K5/167; H02K5/1677
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
151 words
An electric motor having a stator assembly and an outwardly projecting stationary shaft extending cantilever fashion from part of said stator assembly, a rotor having a centrally located cylindrical sleeve telescoped over said shaft, axially spaced bearings of porous material fixed within said sleeve and rotatable on said shaft, and a tubular liner impregnated with oil telescoped into said sleeve and over said shaft and sandwiched between the opposing inboard faces of said bearings, the improvement in said motor comprising, oil retaining rings of absorbent material telescoped into said sleeve and over said shaft and captivated in contact with the outboard faces of said bearings, the inner periphery of the inner one of said rings being formed with angularly spaced and inwardly projecting fingers whose inner ends contact and wipe against said shaft to soak up any oil bleeding along the shaft and to return such oil to the adjacent bearing.
Claim 2
Dependent Claim
151 words
An electric motor having a stator assembly and an outwardly projecting stationary shaft extending cantilever fashion from part of said stator assembly, a rotor having a centrally located cylindrical sleeve telescoped over said shaft, axially spaced bearings of porous material fixed within said sleeve and rotatable on said shaft, and a tubular liner impregnated with oil telescoped into said sleeve and over said shaft and sandwiched between the opposing inboard faces of said bearings, the improvement in said motor comprising, oil retaining rings of absorbent material telescoped into said sleeve and over said shaft and captivated in contact with the outboard faces of said bearings, the inner periphery of the inner one of said rings being formed with angularly spaced and inwardly projecting fingers whose inner ends contact and wipe against said shaft to soak up any oil bleeding along the shaft and to return such oil to the adjacent bearing.
Claim 3
Dependent Claim
152 words
An electric motor having a stator assembly and an outwardly projecting stationary shaft extending cantilever fashion from part of said stator assembly, a rotor having a centrally located cylindrical sleeve telescoped over said shaft, axially spaced bearings of porous material fixed within said sleeve and rotatable on said shaft, and a tubular liner impregnated with oil telescoped into said sleeve and over said shaft and sandwiched between the opposing inboard faces of said bearings, the improvement in said motor comprising, an oil retaining ring of absorbent material telescoped into said sleeve and over said shaft and captivated in contact with the outboard face of the inner one of said bearings, the inner periphery of said ring being formed with angularly spaced and inwardly projecting fingers whose inner ends contact and wipe against said shaft to soak up any oil bleeding along the shaft and to return such oil to the inner bearing.
Claim 4
Dependent Claim
152 words
An electric motor having a stator assembly and an outwardly projecting stationary shaft extending cantilever fashion from part of said stator assembly, a rotor having a centrally located cylindrical sleeve telescoped over said shaft, axially spaced bearings of porous material fixed within said sleeve and rotatable on said shaft, and a tubular liner impregnated with oil telescoped into said sleeve and over said shaft and sandwiched between the opposing inboard faces of said bearings, the improvement in said motor comprising, an oil retaining ring of absorbent material telescoped into said sleeve and over said shaft and captivated in contact with the outboard face of the inner one of said bearings, the inner periphery of said ring being formed with angularly spaced and inwardly projecting fingers whose inner ends contact and wipe against said shaft to soak up any oil bleeding along the shaft and to return such oil to the inner bearing.
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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |