US4641422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a permanent magnet rotor for a synchronous motor
Assignee: Emerson Electric Co
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Filing: 1984-03-16
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Granted: 1987-02-10
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Expires: 2004-03-16
Abstract
Abstract A hub of a permanent magnet rotor includes an elongated one-piece body portion with a bore running therethrough, a circular disc carried by the body portion between ends thereof, and a ring surrounding the body portion and bonded to the circular disc.
Inventors
- 👤 Robert F. Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:29
CPC Classifications
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; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49012
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
133 words
A method of forming a permanent magnet rotor comprising: providing as one piece, an elongated body portion and a circular disc extending from said elongated body portion between opposed ends thereof and having an outer periphery; positioning a ring about said elongated body portion between said opposed ends such that said ring is substantially in line with said disc near said outer periphery only; positioning a permanent magnet having at least one recess therein about said ring and said circular disc; and applying an ultrasonic vibration to at least one of said ring and said circular disc to bond same together near said outer periphery, at least a portion of said ring and said circular disc being melted and flowing into at least said recess whereby said permanent magnet is secured in place.
Claim 2
Independent Claim
133 words
A method of forming a permanent magnet rotor comprising: providing as one piece, an elongated body portion and a circular disc extending from said elongated body portion between opposed ends thereof and having an outer periphery; positioning a ring about said elongated body portion between said opposed ends such that said ring is substantially in line with said disc near said outer periphery only; positioning a permanent magnet having at least one recess therein about said ring and said circular disc; and applying an ultrasonic vibration to at least one of said ring and said circular disc to bond same together near said outer periphery, at least a portion of said ring and said circular disc being melted and flowing into at least said recess whereby said permanent magnet is secured in place.
Claim 3
Dependent Claim
19 words
A method according to claim 1 wherein hub portion, said circular disc, and said ring are fabricated from plastic.
References Cited (Backward Citations)
US3881243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |