US4587451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor for a small electric motor having reduced shaft portion to improve windings
Assignee: Ducellier et Cie
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Filing: 1984-06-26
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Granted: 1986-05-06
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Expires: 2004-06-26
Abstract
Abstract A rotor for a small electric motor, useful for example in a vehicle window raising device, has an armature carried by a shaft and having slots in which electrical conductors are wound and connected to a current collector. The shaft has grooves at both ends of the armature to a depth such as to permit the path of the electrical conductors passing between non-consecutive generally opposed slots during winding of the conductors at the bottom of the armature slots to be substantially rectilinear.
Inventors
- 👤 Francis Savelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:45
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/46; H02K3/50; H02K3/51; H02K7/00; H02K7/10; H02K7/116; H02K7/1163; H02K7/1166
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
148 words
In a rotor for a small electric motor, particularly of the type suitable for automotive use such as in a window operating device, comprising: a rotor shaft and an armature including a stack of metal sheets mounted on said rotor shaft to rotate therewith, said armature having slots in which electrical conductors are wound; and a groove disposed in said rotor shaft at each end of said rotor shaft adjacent said armature, each said groove having a depth sufficient to allow said electrical conductors passing across the respective said end of said armature between non-adjacent substantially opposed slots to be substantially rectilinear where said electrical conductors are disposed adjacent said rotor shaft; said rotor shaft having a predetermined diameter on which said armature is mounted, for supporting said armature; said predetermined diameter being greater than a diameter of said rotor shaft at the location of each said groove.
Claim 2
Dependent Claim
148 words
In a rotor for a small electric motor, particularly of the type suitable for automotive use such as in a window operating device, comprising: a rotor shaft and an armature including a stack of metal sheets mounted on said rotor shaft to rotate therewith, said armature having slots in which electrical conductors are wound; and a groove disposed in said rotor shaft at each end of said rotor shaft adjacent said armature, each said groove having a depth sufficient to allow said electrical conductors passing across the respective said end of said armature between non-adjacent substantially opposed slots to be substantially rectilinear where said electrical conductors are disposed adjacent said rotor shaft; said rotor shaft having a predetermined diameter on which said armature is mounted, for supporting said armature; said predetermined diameter being greater than a diameter of said rotor shaft at the location of each said groove.
Claim 3
Dependent Claim
44 words
A rotor as claimed in claim 1 wherein each said groove is a reduced diameter circumferential groove disposed in said shaft; and at least a portion of some of said electrical conductors are disposed substantially tangentially to a peripheral surface of each respective groove.
Claim 4
Dependent Claim
54 words
A rotor as claimed in claim 1 wherein said rotor shaft further comprises a worm gear integrally formed on a portion of said rotor shaft at a location which is axially spaced from one of said grooves; and a current collector mounted on said rotor shaft operatively connected to ends of said electrical conductors.
Claim 5
Dependent Claim
54 words
A rotor as claimed in claim 2 wherein said rotor shaft further comprises a worm gear integrally formed on a portion of said rotor shaft at a location which is axially spaced from one of said grooves; and a current collector mounted on said rotor shaft operatively connected to ends of said electrical conductors.
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) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |