US4554471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor having a U-shaped stator iron
Assignee: US Philips Corp
•
Filing: 1985-03-13
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Granted: 1985-11-19
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Expires: 2005-03-13
Abstract
Abstract The invention relates to an electric motor having a U-shaped stator iron such as a series-, split-pole- or single-phase synchronous motor. Between the free shank ends of the stator, pole shoes are formed, and on the shanks, induction coils are provided. The shanks of the stator iron in the area between the pole shoes and the coils are bent with respect to the central plane of the stator iron in such manner that the shaft of the rotor with the central plane of the stator iron encloses an angle differing from the perpendicular to the central plane.
Inventors
- 👤 Leo Bertram
- 👤 Hugo Schemmann
- 👤 Jan De Boer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:15
CPC Classifications
H; H02; H02K; H02K21/00; H02K21/12; H02K21/14; H02K21/18; H02K21/185
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
131 words
An electric motor which comprises a rotor having a shaft and a U-shaped stator having two shanks, each shank having a free end, said motor also including induction coils disposed around each of said shanks, each of said shanks being formed to define pole shoes between the free ends of each of said shanks and said induction coil disposed on that shank, said U-shaped stator having the major portion thereof configured so that an imaginary central plane extends through all of said stator except the free ends of said shanks, each of said shanks in the area between said pole shoes and said coils being bent with respect to said central plane in such a manner that said shaft encloses with said central plane an angle which is less than 90°.
Claim 2
Dependent Claim
131 words
An electric motor which comprises a rotor having a shaft and a U-shaped stator having two shanks, each shank having a free end, said motor also including induction coils disposed around each of said shanks, each of said shanks being formed to define pole shoes between the free ends of each of said shanks and said induction coil disposed on that shank, said U-shaped stator having the major portion thereof configured so that an imaginary central plane extends through all of said stator except the free ends of said shanks, each of said shanks in the area between said pole shoes and said coils being bent with respect to said central plane in such a manner that said shaft encloses with said central plane an angle which is less than 90°.
Claim 3
Dependent Claim
28 words
An electric motor as claimed in claim 1, characterized in that a hinge is provided in each of said shank and in said central plane of said stator.
Claim 4
Dependent Claim
25 words
An electric motor as claimed in claim 1, wherein said shanks each include projections for cooperation with recesses in axially adjacent portions of respective shanks.
Claim 5
Dependent Claim
32 words
An electric motor as claimed in claim 1, wherein said shanks have dimensions parallel to said central plane which is much larger than a dimension at right angles to said central plane.
Claim 6
Dependent Claim
29 words
An electric motor as claimed in claim 3, wherein said shanks have a larger dimension perpendicular to said central plane than in the direction parallel to said central plane.
Claim 7
Dependent Claim
51 words
An electric motor as claimed in claim 4, wherein the dimension of said shanks parallel to said central plane is in the order of between 7 and 15 units and the dimension of said shanks perpendicular to said central plane is in the order of magnitude of 1 to 7 units.
Claim 8
Dependent Claim
51 words
An electric motor as claimed in claim 4, wherein the dimension of said shanks perpendicular to said central plane is in the order of between 7 and 15 units and the dimension of said shanks parallel to said central plane is in the order of magnitude of 1 to 7 units.
Claim 9
Dependent Claim
50 words
An electric motor as claimed in claim 6, wherein the dimension of each of said shanks parallel to said central plane is in the order of magnitude of 12 units and the dimension of said shanks perpendicular to said central plane is in the order of magnitude of 5 units.
Claim 10
Dependent Claim
25 words
An electric motor as claimed in claim 1 wherein the thickness of said shanks is between 0.5 and 5.0 mm and preferably is 1.0 mm.
Claim 11
Dependent Claim
19 words
An electric motor as claimed in claim 1 wherein said stator iron consists of 1 to 7 laminated sheets.
Claim 12
Dependent Claim
23 words
An electric motor as claimed in claim 1 wherein said electric motor is a single-phase synchronous motor having a two-pole permanent magnetic rotor.
Claim 13
Dependent Claim
22 words
An electric motor as claimed in claim 1 wherein each of said shanks has a second axially spaced induction coil mounted thereon.
Claim 14
Dependent Claim
131 words
An electric motor which comprises a rotor having a shaft and a U-shaped stator having two shanks, each shank having a free end, said motor also including induction coils disposed around each of said shanks, each of said shanks being formed to define pole shoes between the free ends of each of said shanks and said induction coil disposed on that shank, said U-shaped stator having the major portion thereof configured so that an imaginary central plane extends through all of said stator except the free ends of said shanks, each of said shanks in the area between said pole shoes and said coils being bent with respect to said central plane in such a manner that said shaft encloses with said central plane an angle which is more than 90°.
Claim 15
Dependent Claim
131 words
An electric motor which comprises a rotor having a shaft and a U-shaped stator having two shanks, each shank having a free end, said motor also including induction coils disposed around each of said shanks, each of said shanks being formed to define pole shoes between the free ends of each of said shanks and said induction coil disposed on that shank, said U-shaped stator having the major portion thereof configured so that an imaginary central plane extends through all of said stator except the free ends of said shanks, each of said shanks in the area between said pole shoes and said coils being bent with respect to said central plane in such a manner that said shaft encloses with said central plane an angle which is more than 90°.
Claim 16
Dependent Claim
28 words
An electric motor as claimed in claim 13, characterized in that a hinge is provided in each of said shank and in said central plane of said stator.
Claim 17
Dependent Claim
25 words
An electric motor as claimed in claim 13, wherein said shanks each include projections for cooperation with recesses in axially adjacent portions of respective shanks.
Claim 18
Dependent Claim
32 words
An electric motor as claimed in claim 13, wherein said shanks have dimensions parallel to said central plane which is much larger than a dimension at right angles to said central plane.
Claim 19
Dependent Claim
29 words
An electric motor as claimed in claim 15, wherein said shanks have a larger dimension perpendicular to said central plane than in the direction parallel to said central plane.
Claim 20
Dependent Claim
51 words
An electric motor as claimed in claim 16, wherein the dimension of said shanks parallel to said central plane is in the order of between 7 and 15 units and the dimension of said shanks perpendicular to said central plane is in the order of magnitude of 1 to 7 units.
Claim 21
Dependent Claim
51 words
An electric motor as claimed in claim 16, wherein the dimension of said shanks perpendicular to said central plane is in the order of between 7 and 15 units and the dimension of said shanks parallel to said central plane is in the order of magnitude of 1 to 7 units.
Claim 22
Dependent Claim
50 words
An electric motor as claimed in claim 18, wherein the dimension of each of said shanks parallel to said central plane is in the order of magnitude of 12 units and the dimension of said shanks perpendicular to said central plane is in the order of magnitude of 5 units.
Claim 23
Dependent Claim
25 words
An electric motor as claimed in claim 16 wherein the thickness of said shanks is between 0.5 and 5.0 mm and preferably is 1.0 mm.
Claim 24
Dependent Claim
19 words
An electric motor as claimed in claim 16 wherein said stator iron consists of 1 to 7 laminated sheets.
Claim 25
Dependent Claim
23 words
An electric motor as claimed in claim 16 wherein said electric motor is a single-phase synchronous motor having a two-pole permanent magnetic rotor.
Claim 26
Dependent Claim
22 words
An electric motor as claimed in claim 16 wherein each of said shanks has a second axially spaced induction coil mounted thereon.
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) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |