US3757149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shading coil motor assembly
Assignee: Molon Motor and Coil Corp
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Filing: 1972-02-16
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Granted: 1973-09-04
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Expires: 1992-02-16
Abstract
Abstract A shading coil motor assembly including a pair of juxtaposed stator frames, each having a rotor, a common coil to produce magnetic flux for both stator frames, and drive shafts joined to the rotor on spaced, parallel axes for delivering torque to a common gear and output shaft.
Inventors
- 👤 F Holper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:24
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/04; H02K17/10; H02K16/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
87 words
A shading coil motor assembly comprising a pair of juxtaposed identical magnetic stator frames, a rotor cavity in each frame, shading coil means on each frame, a rotor in each rotor cavity and each rotor having a rotor shaft, the rotational axes of said rotor shafts being in juxtaposed parallel spaced relation, a single common coil connected to said stator frames to develop magnetic flux simultaneously in both stator frames when the coil is energized, and means for coupling the rotor shafts to a single output shaft.
Claim 2
Dependent Claim
87 words
A shading coil motor assembly comprising a pair of juxtaposed identical magnetic stator frames, a rotor cavity in each frame, shading coil means on each frame, a rotor in each rotor cavity and each rotor having a rotor shaft, the rotational axes of said rotor shafts being in juxtaposed parallel spaced relation, a single common coil connected to said stator frames to develop magnetic flux simultaneously in both stator frames when the coil is energized, and means for coupling the rotor shafts to a single output shaft.
Claim 3
Dependent Claim
25 words
The combination as defined in claim 1, wherein fans are coupled to the rotor shafts for creating a flow of air across the stator frames.
Claim 4
Dependent Claim
15 words
The combination as defined in claim 1, wherein said coupling means includes a gear box.
Claim 5
Dependent Claim
107 words
A shading coil motor assembly comprising a pair of juxtaposed U-shaped magnetic stator frames, a rotor cavity in each frame, shading coil means on each frame at the cavity, a rotor freely rotatable in each rotor cavity, each rotor having a rotor shaft the rotational axes of said rotor shafts being in juxtaposed parallel spaced relation, the open ends of the U-shaped frames facing each other and being closed by magnetic coil cores, a common coil wrapped around said coil cores to develop magnetic flux simultaneously in both coil cores when the coil is energized, and means for coupling the rotor shafts to a single output shaft.
Claim 6
Dependent Claim
107 words
A shading coil motor assembly comprising a pair of juxtaposed U-shaped magnetic stator frames, a rotor cavity in each frame, shading coil means on each frame at the cavity, a rotor freely rotatable in each rotor cavity, each rotor having a rotor shaft the rotational axes of said rotor shafts being in juxtaposed parallel spaced relation, the open ends of the U-shaped frames facing each other and being closed by magnetic coil cores, a common coil wrapped around said coil cores to develop magnetic flux simultaneously in both coil cores when the coil is energized, and means for coupling the rotor shafts to a single output shaft.
Claim 7
Dependent Claim
25 words
A shading coil motor assembly as defined in claim 4, wherein said coupling means includes gearing means connecting the rotor shafts to the output shafts.
Claim 8
Dependent Claim
30 words
A shading motor assembly is defined in claim 5, wherein said rotor shafts extend from both ends of the rotors, and fans are mounted on one end for cooling purposes.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |