US4039876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved supporting arrangement for hollow cylindrical armature winding
Assignee: Hitachi Ltd
•
Filing: 1975-09-05
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Granted: 1977-08-02
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Expires: 1995-09-05
Abstract
Abstract A cylindrical armature has a rotor ring firmly fitted on a shaft, and an armature winding arranged cylindrically and coaxially with the rotor ring and having at least a uniform inner cylindrical insulating layer in closed contact with the inner peripheral surface of the cylindrical armature winding, one end of the armature winding being fixed on the outer peripheral surface of the rotor ring. The outer peripheral surface of the rotor ring, through which the armature winding is coupled with the rotor ring, has grooves knurled at almost the same angle as the angle at which a filament constituting the inner cylindrical insulating layer is wound, whereby a reinforcing layer is formed integrally with the inner cylindrical insulating layer within the knurled grooves, when the filament is wound up.
Inventors
- 👤 Keita Takasaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:15
CPC Classifications
H; H02; H02K; H02K3/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
129 words
A cylindrical armature comprising an armature winding cylindrically arranged, and a rotor ring fixed on a shaft, said armature winding having at least an inner cylindrical insulating layer formed by winding a filament member at least on the inner peripheral surface of said armature winding, said armature winding having an end fixed on the outer peripheral surface of said rotor ring, said rotor ring having a plurality of knurled grooves in the surface thereof through which surface said armature winding is coupled with the rotor ring, said knurled grooves being cut at substantially the same angle as the angle at which said filament member of said inner cylindrical insulating layer is wound, whereby a reinforcing layer is formed integrally with said inner cylindrical insulating layer within said knurled grooves.
Claim 2
Dependent Claim
129 words
A cylindrical armature comprising an armature winding cylindrically arranged, and a rotor ring fixed on a shaft, said armature winding having at least an inner cylindrical insulating layer formed by winding a filament member at least on the inner peripheral surface of said armature winding, said armature winding having an end fixed on the outer peripheral surface of said rotor ring, said rotor ring having a plurality of knurled grooves in the surface thereof through which surface said armature winding is coupled with the rotor ring, said knurled grooves being cut at substantially the same angle as the angle at which said filament member of said inner cylindrical insulating layer is wound, whereby a reinforcing layer is formed integrally with said inner cylindrical insulating layer within said knurled grooves.
Claim 3
Dependent Claim
101 words
A hollow cylindrical armature comprising a rotor shaft, a rotor ring fixed on said shaft and having an outer peripheral surface provided with a plurality of circumferential grooves disposed in planes angularly disposed with respect to the axis of said rotor ring and said shaft, an elongated cylindrical insulating layer formed of a wound filament member supported at one end thereof on the outer surface of said rotor ring with said filament member being wound into the grooves in the surface of said rotor ring, and a cylindrically arranged armature winding disposed on the outer peripheral surface of said insulating layer.
Claim 4
Dependent Claim
101 words
A hollow cylindrical armature comprising a rotor shaft, a rotor ring fixed on said shaft and having an outer peripheral surface provided with a plurality of circumferential grooves disposed in planes angularly disposed with respect to the axis of said rotor ring and said shaft, an elongated cylindrical insulating layer formed of a wound filament member supported at one end thereof on the outer surface of said rotor ring with said filament member being wound into the grooves in the surface of said rotor ring, and a cylindrically arranged armature winding disposed on the outer peripheral surface of said insulating layer.
Claim 5
Dependent Claim
20 words
A hollow cylindrical armature as defined in claim 2 wherein said wound filament member is impregnated with an insulating resin.
Claim 6
Dependent Claim
45 words
A hollow cylindrical armature as defined in claim 2 wherein said circumferential grooves extend in two directions with respect to the axis of said rotor ring and said shaft so as to provide a knurled configuration on the outer peripheral surface of said rotor ring.
Claim 7
Dependent Claim
36 words
A hollow cylindrical armature as defined in claim 4, further including a second insulating layer disposed over said armature winding and having the same construction as said elongated cylindrical insulating layer supported on said rotor ring.
Claim 8
Dependent Claim
20 words
A hollow cylindrical armature as defined in claim 5 wherein said wound filament member is impregnated with an insulating resin.
Claim 9
Dependent Claim
38 words
A hollow cylindrical armature as defined in claim 4 wherein said wound filament member is a glass filament impregnated with resin and wound in spiral reciprocation into the grooves in the outer peripheral surface of said rotor ring.
Claim 10
Dependent Claim
20 words
A hollow cylindrical armature as defined in claim 2 wherein the outer peripheral surface of said rotor ring is tapered.
Claim 11
Dependent Claim
45 words
A hollow cylindrical armature as defined in claim 2 wherein the depth of said circumferential grooves in the outer surface of said rotor ring exceeds the magnitude of possible variation of the diameter of said rotor ring due to possible thermal expansion and contraction thereof.
References Cited (Backward Citations)
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Cited
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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) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |