US4926540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing an electric motor
Assignee: Brother Industries Ltd
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Filing: 1989-05-31
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Granted: 1990-05-22
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Expires: 2009-05-31
Abstract
Abstract A motor is equipped with a magnetic structure, stator assemblies having a non-magnetic molding member for being incorporated in the magnetic structure and coils for being wound on the outer periphery of each stator assembly. The magnetic structure is provided with magnetic pole plate bodies, a recess provided in each magnetic pole plate body, bridge members incorporated in the magnetic pole plate body in such a manner as to surround the recess and a plurality of terminal elements whose base ends are coupled to the bridge members and whose free ends are extended toward the recess. The recess, together with the free ends of the terminal elements, is filled with the non-magnetic molding member. On the other hand, the bridge members are not embedded with the non-magnetic molding member but are subsequently cut and removed, so that the base ends of the terminal elements are arranged in such a manner as to project from the surface of the non-magnetic molding member.
Inventors
- 👤 Iwao Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:52
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/22; H02K5/225; H02K3/00; H02K3/46; H02K3/52; H02K3/521; H02K3/525; H02K15/00; H02K15/30; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49117; Y10T29/49169; Y10T29/49171; Y10T29/49172; Y10T29/49204; Y10T29/49208; Y10T29/4922; Y10T29/49799
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
203 words
A process of producing a motor having at least two stator assemblies, each including magnetic means and a non-magnetic molded member incorporated in said magnetic means, coils wound on the outer periphery of said stator assemblies, and a rotor rotating within said stator assemblies, said process comprising the steps of: forming said magnetic means to have magnetic pole plate bodies, a recess formed in at least one of said magnetic pole plate bodies, a bridge member incorporated in said at least one of said magnetic pole plate bodies in such a manner as to close said recess, a plurality of terminal elements respectively having base ends and free ends with the base ends being coupled to said bridge member and the free ends extending into and toward said recess; molding said stator assemblies by filling said recess of said magnetic means, together with the free ends of said terminal elements, with said non-magnetic molded member; projecting the base ends of said terminal elements from the surface of said non-magnetic molded member by cutting and removing said bridge member of said stator assembly; and winding said coils on said stator assemblies and electrically connecting the ends thereof to the projections of said terminal elements.
Claim 2
Dependent Claim
203 words
A process of producing a motor having at least two stator assemblies, each including magnetic means and a non-magnetic molded member incorporated in said magnetic means, coils wound on the outer periphery of said stator assemblies, and a rotor rotating within said stator assemblies, said process comprising the steps of: forming said magnetic means to have magnetic pole plate bodies, a recess formed in at least one of said magnetic pole plate bodies, a bridge member incorporated in said at least one of said magnetic pole plate bodies in such a manner as to close said recess, a plurality of terminal elements respectively having base ends and free ends with the base ends being coupled to said bridge member and the free ends extending into and toward said recess; molding said stator assemblies by filling said recess of said magnetic means, together with the free ends of said terminal elements, with said non-magnetic molded member; projecting the base ends of said terminal elements from the surface of said non-magnetic molded member by cutting and removing said bridge member of said stator assembly; and winding said coils on said stator assemblies and electrically connecting the ends thereof to the projections of said terminal elements.
Claim 3
Dependent Claim
48 words
A process of producing a motor as claimed in claim 1, wherein said magnetic means includes one magnetic pole plate body having said recess, said bridge and said terminal element structure and another magnetic pole plate body not having said recess, said bridge and said terminal element structure.
Claim 4
Dependent Claim
77 words
A process of producing a motor as claimed in claim 1, wherein at least a pair of apertures are provided in the periphery of said magnetic pole plate body, wherein said non-magnetic molded member has a mating projection at one aperture and a mating hole at the other, and wherein two of said stator assemblies are combined together in the direction of the rotary shaft of said rotor by fitting said mating projection into said matting hole.
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) | 1993-05-21 | 1993-11-20 | 1994-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-21 | 1997-11-20 | 1998-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-21 | 2001-11-20 | 2002-05-22 | $7700.00 | Window Closed / Lapsed |