US3793543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamoelectric machine
Assignee: General Electric Co
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Filing: 1973-01-19
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Granted: 1974-02-19
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Expires: 1993-01-19
Abstract
Abstract Lubrication retention system includes oil throwing member. Features of improved oil thrower may be included in a thrust member. Particular benefits may be realized for vertical shaft motor applications which require frequent start-stop cycling and low speed operation. Oil throwers have oil feeding surfaces and departure surfaces or edges particularly oriented relative to one another and dimensioned to be within preselected ranges of sizes. Oil throwers can prevent oil from escaping down the motor shaft or past the lip of an oil well cover or end cap. Oil throwers are provided with departure surfaces (or slinging edges) specifically designed to have at least a minimum dimension so that oil droplets will not be thrown from a knife edge. Oil feeding surfaces are generally planar and lie in a plane normal to the axis of shaft rotation. The feeding surface and the slinging edge are oriented to define relatively square corners. Oil slinging edges are on a diameter sufficiently large to move at an angular velocity of a predetermined minimum speed. Clearances are provided between active oil thrower surfaces and adjacent surfaces.
Inventors
- 👤 J Stokke
- 👤 R Langdon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:05
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/10; F16C33/1025; F16C33/103; F16C33/72; F16C33/74; H; H02; H02K; H02K5/00; H02K5/04; H02K5/16; H02K5/167; H02K5/1672
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
156 words
In an electric motor, a rotor assembly including a shaft rotatable about a longitudinal axis of rotation, means rotatably supporting said shaft, means for lubricating said shaft during rotation thereof, lubricant feeding means, and lubricant return means for returning lubricant to the lubricant feeding means; said lubricant return means including at least one lubricant thrower and at least one thrust member having a lubricant throwing portion; said lubricant thrower and said throwing portion each having a substantially planar lubricant feeding surface disposed in a plane substantially normal to the longitudinal axis of rotation and each having a lubricant throwing edge surface generally concentric with the shaft; said throwing edge surface of said throwing portion and thrower having a dimension along the direction of the axis of rotation of at least three-hundredths of an inch; and at least one of the feeding surfaces being spaced at least five-hundredths of an inch from motor structure next adjacent thereto.
Claim 2
Dependent Claim
156 words
In an electric motor, a rotor assembly including a shaft rotatable about a longitudinal axis of rotation, means rotatably supporting said shaft, means for lubricating said shaft during rotation thereof, lubricant feeding means, and lubricant return means for returning lubricant to the lubricant feeding means; said lubricant return means including at least one lubricant thrower and at least one thrust member having a lubricant throwing portion; said lubricant thrower and said throwing portion each having a substantially planar lubricant feeding surface disposed in a plane substantially normal to the longitudinal axis of rotation and each having a lubricant throwing edge surface generally concentric with the shaft; said throwing edge surface of said throwing portion and thrower having a dimension along the direction of the axis of rotation of at least three-hundredths of an inch; and at least one of the feeding surfaces being spaced at least five-hundredths of an inch from motor structure next adjacent thereto.
Claim 3
Dependent Claim
54 words
The structure of claim 1 wherein the throwing edge surface of the thrower and throwing portion establish the radially outermost extremity of such parts; each said edge surface having a diameter of at least one and seven-hundredths of an inch whereby efficient oil slinging will result during intermittent low speed vertical shaft motor operation.
Claim 4
Dependent Claim
159 words
An electric motor comprising a rotor assembly including a shaft rotatable about a longitudinal axis of rotation, means rotatably supporting said shaft, means for lubricating said shaft during rotation thereof, lubricant feeding means, and lubricant return means for returning lubricant to the lubricant feeding means; said lubricant return means including at least one lubricant throwing means; said lubricant throwing means having a substantially continuous lubricant feeding surface disposed in a plane substantially normal to the longitudinal axis of rotation and having a lubricant throwing edge surface generally concentric with the shaft; said throwing edge surface having a dimension along the direction of the axis of rotation of from about three-hundredths of an inch to about six-hundredths of an inch; said feeding surface being spaced at least five-hundredths of an inch from motor structure next adjacent thereto and terminating at the edge surface; said throwing means also including another continuous surface disposed in parallel relation to the lubricant feeding surface.
Claim 5
Dependent Claim
159 words
An electric motor comprising a rotor assembly including a shaft rotatable about a longitudinal axis of rotation, means rotatably supporting said shaft, means for lubricating said shaft during rotation thereof, lubricant feeding means, and lubricant return means for returning lubricant to the lubricant feeding means; said lubricant return means including at least one lubricant throwing means; said lubricant throwing means having a substantially continuous lubricant feeding surface disposed in a plane substantially normal to the longitudinal axis of rotation and having a lubricant throwing edge surface generally concentric with the shaft; said throwing edge surface having a dimension along the direction of the axis of rotation of from about three-hundredths of an inch to about six-hundredths of an inch; said feeding surface being spaced at least five-hundredths of an inch from motor structure next adjacent thereto and terminating at the edge surface; said throwing means also including another continuous surface disposed in parallel relation to the lubricant feeding surface.
Claim 6
Dependent Claim
26 words
The structure of claim 3 wherein an annular cavity is provided on the feeding surface and on the another surface between the shaft and edge surface.
Claim 7
Dependent Claim
16 words
The structure of claim 4 wherein the edge surface has a diameter greater than one inch.
Claim 8
Dependent Claim
32 words
The structure of claim 3 wherein said lubricant return means includes a thrust member having a throwing portion; said throwing portion having an edge surface that is substantially concentric with said shaft.
Claim 9
Dependent Claim
42 words
The structure of claim 6 further including a collar on the shaft adjacent to the thrust member; said thrust member having spaced apart generally planar substantially parallel lubricant feeding surfaces that are oriented in substantially perpendicular relation to the axis of rotation.
Claim 10
Dependent Claim
15 words
The structure of claim 3 wherein the lubricant thrower is formed of an elastomer material.
References Cited (Backward Citations)
US3250579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |