US3916231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction motor
Assignee: Keppel LeTourneau USA Inc
•
Filing: 1973-12-26
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Granted: 1975-10-28
•
Expires: 1993-12-26
Abstract
Abstract An induction motor having a frame, end bells closing the ends of said frame, a shaft, lubricated bearings rotatably supporting said shaft in said end bells, means sealing between said shaft and said end bells, a rotor mounted on said shaft, a stator, rings supported on said end bells, clips supported by said rings and supporting said stator, a pair of annular heaters, one of said heaters mounted on the inner surface of each of said end bells and in close spaced relationship to said seals and said bearings for heating them and positioned to heat air circulating within said motor. This abstract is neither intended to define the invention of the application which, of course, is measured by the claims, nor is it intended to be limiting as to the scope of the invention in any way.
Inventors
- 👤 Jimmie J Cathey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:05
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/10; H02K15/00; H02K15/12; H02K15/125
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
220 words
An induction motor, comprising a cylindrical frame, a pair of end bells adapted to be secured to the ends of said frame, a rotor shaft rotatably supported in said end bells, an induction rotor mounted on said shaft, an induction stator mounted to the end bells in surrounding relationship to said rotor, a plurality Of vanes mounted on said shaft, said rotor, stator, frame and end bells defining a plurality of air passages through and around the ends of said rotor and said stator through which air is circulated by said vanes, a pair of rings, each of said end bells defining interior shoulders for engaging and aligning one of said rings around said rotor shaft, said rings and said frame defining a plurality of slots, a plurality of clips adapted to be received in said slots and to engage and support said stator, seals in said shaft, bearing means supporting said shaft in said end bells, an annular heater supported on each of said end bells exposed to the interior of said motor, means for retaining lubricating oil in said bearing means, said heaters being positioned to heat said seals, the lubricating oil in said bearings and the air flowing through said air passages, and said secured end bells and said frame totally enclosing said rotor and said stator.
Claim 2
Dependent Claim
220 words
An induction motor, comprising a cylindrical frame, a pair of end bells adapted to be secured to the ends of said frame, a rotor shaft rotatably supported in said end bells, an induction rotor mounted on said shaft, an induction stator mounted to the end bells in surrounding relationship to said rotor, a plurality Of vanes mounted on said shaft, said rotor, stator, frame and end bells defining a plurality of air passages through and around the ends of said rotor and said stator through which air is circulated by said vanes, a pair of rings, each of said end bells defining interior shoulders for engaging and aligning one of said rings around said rotor shaft, said rings and said frame defining a plurality of slots, a plurality of clips adapted to be received in said slots and to engage and support said stator, seals in said shaft, bearing means supporting said shaft in said end bells, an annular heater supported on each of said end bells exposed to the interior of said motor, means for retaining lubricating oil in said bearing means, said heaters being positioned to heat said seals, the lubricating oil in said bearings and the air flowing through said air passages, and said secured end bells and said frame totally enclosing said rotor and said stator.
Claim 3
Dependent Claim
142 words
An induction motor, comprising a hollow cylindrical frame, a pair of end bells, means for securing said end bells to the ends of said frame, an induction rotor, means in said end bells for mounting said rotor within said frame, an induction stator, means contained within said end bells for mounting said stator within said frame in preselected relation to said rotor, said frame with said end bells secured thereto totally enclosing said mounted rotor and said mounted stator, and means for connecting said stator and said frame whereby stator torque is transmitted to said frame including, a plurality of clips secured to the exterior of said induction stator in parallel relation to the axis of said stator, said frame defining grooves extending along its interior surface to receive said clips whereby stator torque is transmitted to said frame by said clips.
Claim 4
Dependent Claim
142 words
An induction motor, comprising a hollow cylindrical frame, a pair of end bells, means for securing said end bells to the ends of said frame, an induction rotor, means in said end bells for mounting said rotor within said frame, an induction stator, means contained within said end bells for mounting said stator within said frame in preselected relation to said rotor, said frame with said end bells secured thereto totally enclosing said mounted rotor and said mounted stator, and means for connecting said stator and said frame whereby stator torque is transmitted to said frame including, a plurality of clips secured to the exterior of said induction stator in parallel relation to the axis of said stator, said frame defining grooves extending along its interior surface to receive said clips whereby stator torque is transmitted to said frame by said clips.
Claim 5
Dependent Claim
29 words
An induction motor according to claim 2 including heating means mounted on the inner surface of each of said end bells and exposed to the interior of said motor.
Claim 6
Dependent Claim
31 words
An induction motor according to claim 3 wherein said heating means is positioned to heat the air within said motor and the rotor seals and the rotor bearings of said motor.
Claim 7
Dependent Claim
167 words
An induction motor, comprising a hollow cylindrical frame, a pair of end bells, means for securing said end bells to the ends of said frame, an induction rotor, means in said end bells for mounting said rotor within said frame, an induction stator, means contained within said end bells for mounting said stator within said frame in preselected relation to said rotor, said frame with said end bells secured thereto totally enclosing said mounted rotor and said mounted stator, and means for connecting said stator and said frame whereby stator torque is transmitted to said frame, said mounting means including a pair of mounting rings, and means for securing said mounting rings in concentric relationship to each end of said induction stator, said end bells each defining an outwardly facing annular shoulder concentric with said rotor mounting means, said mounting rings engaging said annular shoulders on said end bell on assembly of the components of said motor to maintain a concentricity between said rotor and said stator.
Claim 8
Dependent Claim
167 words
An induction motor, comprising a hollow cylindrical frame, a pair of end bells, means for securing said end bells to the ends of said frame, an induction rotor, means in said end bells for mounting said rotor within said frame, an induction stator, means contained within said end bells for mounting said stator within said frame in preselected relation to said rotor, said frame with said end bells secured thereto totally enclosing said mounted rotor and said mounted stator, and means for connecting said stator and said frame whereby stator torque is transmitted to said frame, said mounting means including a pair of mounting rings, and means for securing said mounting rings in concentric relationship to each end of said induction stator, said end bells each defining an outwardly facing annular shoulder concentric with said rotor mounting means, said mounting rings engaging said annular shoulders on said end bell on assembly of the components of said motor to maintain a concentricity between said rotor and said stator.
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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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |