Patent US4900967A successfully refreshed from Google Patents.
US4900967A
Expired / Lapsed
US
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Electric motor assembly
Assignee: Aisin Corp
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Filing: 1988-09-30
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Granted: 1990-02-13
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Expires: 2008-09-30
Abstract
Abstract An electric motor assembly is comprised of a two-part cylindrical housing having a stepped interconnection. A circular plate is secured between the two housing portions by means of a plurality of spring clips located in peripheral recesses on said disk and having a flexible extension portion disposed in stressed engagement with one of said cylindrical housing portions to bias the plate into engagement with the stepped portion of the other cylindrical housing portion. The stator and rotor may be located on one side of the plate and a brush may be mounted on the opposite side of the plate for engagement with a commutator rotatable with the rotor.
Inventors
- 👤 Hiroyuki Amano
- 👤 Hiroyuki Takagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:49
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/14; H02K5/143; H02K5/148; H01; H01R; H01R39/00; H01R39/02; H01R39/38; H01R39/41
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
146 words
An electric motor assembly comprising housing means having first and second substantially cylindrical parts provided with stepped end portions connected in an interfitting circumferentially extending stepped connection, stator means secured within said housing means, rotor means rotatably supported in said housing means, a stationary base plate having a circumferential portion with circumferential concave recesses disposed intermediate the stepped end portions of said first and second substantially cylindrical parts in axial engagement with one of said first and second substantially cylindrical parts, spring means having intermediate portions mounted in said recesses between said plate and the other of said first and second substantially cylindrical parts and having end portions engaging said housing means for biasing said plate into engagement with said one of said first and second substantially cylindrical parts, and brush means mounted on said plate for engagement with commutator means carried by said motor assembly.
Claim 2
Dependent Claim
146 words
An electric motor assembly comprising housing means having first and second substantially cylindrical parts provided with stepped end portions connected in an interfitting circumferentially extending stepped connection, stator means secured within said housing means, rotor means rotatably supported in said housing means, a stationary base plate having a circumferential portion with circumferential concave recesses disposed intermediate the stepped end portions of said first and second substantially cylindrical parts in axial engagement with one of said first and second substantially cylindrical parts, spring means having intermediate portions mounted in said recesses between said plate and the other of said first and second substantially cylindrical parts and having end portions engaging said housing means for biasing said plate into engagement with said one of said first and second substantially cylindrical parts, and brush means mounted on said plate for engagement with commutator means carried by said motor assembly.
Claim 3
Dependent Claim
21 words
A motor device as claimed in claim 1 wherein said intermediate portions of said spring means are of approximately U-shaped configuration.
Claim 4
Dependent Claim
20 words
A motor device as claimed in claim 1 wherein said spring means is comprised of an elongated bent elastic member.
Claim 5
Dependent Claim
18 words
A motor device as claimed in claim 1 wherein said end portions of said spring means have R-configuration.
References Cited (Backward Citations)
DE2249684A1
Cited
GB2075276A
Cited
US4398135A
Cited
JPS60121940A
Cited
JPS626831A
Cited
WO1988001801A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-12 | 1993-08-14 | 1994-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-12 | 1997-08-14 | 1998-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-12 | 2001-08-14 | 2002-02-13 | $7700.00 | Window Closed / Lapsed |