US3881243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making permanent magnet rotor for a synchronous motor
Assignee: Duracell Inc USA
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Filing: 1973-12-10
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Granted: 1975-05-06
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Expires: 1993-12-10
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
2026-11-01 13:29
CPC Classifications
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; B29C66/70; B29C66/71; B29C66/712; H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/27; H02K1/2706; H02K1/272; H02K1/2726; H02K1/2733; H02K15/00; H02K15/02; H02K15/03; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29L; B29L2031/00; B29L2031/30; B29L2031/3055; B29L2031/3061; B29L2031/32; H02K2201/00; H02K2201/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49012
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
82 words
A method of forming a permanent magnet rotor comprising: a. providing a hub of at least two sections, b. positioning a permanent magnet having at least one recess therein between said sections at their outer peripheries, and c. applying an ultrasonic vibration to at least one of said sections to bond said sections together at their outer peripheries, at least a portion of said sections being melted and flowing into at least said recess whereby said permanent magnet is secured in place.
Claim 2
Independent Claim
82 words
A method of forming a permanent magnet rotor comprising: a. providing a hub of at least two sections, b. positioning a permanent magnet having at least one recess therein between said sections at their outer peripheries, and c. applying an ultrasonic vibration to at least one of said sections to bond said sections together at their outer peripheries, at least a portion of said sections being melted and flowing into at least said recess whereby said permanent magnet is secured in place.
Claim 3
Dependent Claim
13 words
A method according to claim 1 wherein said sections are fabricated from plastic.
Claim 4
Dependent Claim
27 words
A method according to claim 2 wherein said plastic is a thermoplastic material taken from the group converting essentially of polyprolene, polyamide, polystyrene, polycarbonate, and acetal resins.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |