Patent US3953752A successfully refreshed from Google Patents.
US3953752A
Expired / Lapsed
US
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Permanent magnet rotor for a synchronous motor and method of making same
Assignee: Duracell Inc USA
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Filing: 1973-03-16
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Granted: 1976-04-27
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Expires: 1993-03-16
Abstract
Abstract A permanent magnet is carried by two sections of a hub, the sections being bonded together by welding.
Inventors
- 👤 Albert C. Bannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:59
CPC Classifications
H; H02; H02K; H02K21/00; H02K21/12; H02K21/14; H02K21/145; B; B29; B29C; B29C65/00; B29C65/02; B29C65/08; B29C66/00; B29C66/01; B29C66/05; B29C66/302; B29C66/3022; B29C66/30223; B29C66/50; B29C66/51; B29C66/54; H02K1/00; H02K1/06; H02K1/22; H02K1/27; H02K1/2706; H02K1/272; H02K1/2726; H02K1/2733; H02K15/00; H02K15/02; H02K15/03; B29C66/70; B29C66/71; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/83; B29C66/832; B29C66/8322; B29L; B29L2031/00; B29L2031/30; B29L2031/3055; B29L2031/3061; B29L2031/32; H02K2201/00; H02K2201/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
31 words
A rotor comprising: a. a hub including at least two sections bonded together near their outer peripheries only, and b. a permanent magnet carried about said perpheries of said two sections.
Claim 2
Dependent Claim
31 words
A rotor comprising: a. a hub including at least two sections bonded together near their outer peripheries only, and b. a permanent magnet carried about said perpheries of said two sections.
Claim 3
Dependent Claim
14 words
A rotor according to claim 1 wherein said sections are fabricated of a plastic.
Claim 4
Dependent Claim
27 words
A rotor according to claim 2 wherein said plastic is a thermoplastic material taken from the group consisting essentially of polypropylene, polyamide, polystyrene, polycarbonate, and acetal resins.
Claim 5
Dependent Claim
47 words
A rotor according to claim 1 wherein each of said sections include substantially circular discs having an outer periphery and an L-shaped flange periphery, from said peripery, said sections joined together to provide an annular space between said L-shaped flanges in which said permanent magnet is carried.
Claim 6
Dependent Claim
20 words
A rotor according to claim 2 wherein said permanent magnet includes means preventing angular displacement with respect to said hub.
Claim 7
Dependent Claim
38 words
A rotor according to claim 5 wherein said means preventing angular displacement comprises at least one recess in an inner wall of said permanent magnet, said recess receiving material flowing from said sections when said bond is formed.
Claim 8
Dependent Claim
106 words
A rotor comprising: a. a hub comprising first and second sections, b. said first section comprising a body portion, and a web carried about said body portion and having a substantially flat face and an outer periphery, and a flange extending from said outer periphery, c. said second section comprising a circular member having an outer periphery, a flange extending from said outer periphery, d. said second section bonded to said first section at said face and near said outer peripheries only such that said flanges provide an annular space about said first and second sections, and e. a permanent magnet carried in said annular space.
Claim 9
Dependent Claim
106 words
A rotor comprising: a. a hub comprising first and second sections, b. said first section comprising a body portion, and a web carried about said body portion and having a substantially flat face and an outer periphery, and a flange extending from said outer periphery, c. said second section comprising a circular member having an outer periphery, a flange extending from said outer periphery, d. said second section bonded to said first section at said face and near said outer peripheries only such that said flanges provide an annular space about said first and second sections, and e. a permanent magnet carried in said annular space.
Claim 10
Dependent Claim
101 words
A synchronous motor comprising: a field structure including outer and inner field plates having pole tips spaced along a circle, an energizing winding for said field structure for connection to a source of alternating current, and a permanent magnet rotor having a plurality of spaced permanent poles of opposite polarity and rotatable by an alternating field from said pole tips, said permanent magnet rotor including: a hub including at least two sections bonded together near their outer peripheries only, and a permanent magnet carried about said peripheries of said sections, said permanent poles of opposite polarity carried by said permanent magnet.
Claim 11
Dependent Claim
101 words
A synchronous motor comprising: a field structure including outer and inner field plates having pole tips spaced along a circle, an energizing winding for said field structure for connection to a source of alternating current, and a permanent magnet rotor having a plurality of spaced permanent poles of opposite polarity and rotatable by an alternating field from said pole tips, said permanent magnet rotor including: a hub including at least two sections bonded together near their outer peripheries only, and a permanent magnet carried about said peripheries of said sections, said permanent poles of opposite polarity carried by said permanent magnet.
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) | 1979-04-27 | 1979-10-27 | 1980-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-27 | 1983-10-27 | 1984-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-27 | 1987-10-27 | 1988-04-27 | $7700.00 | Window Closed / Lapsed |