Patent US4933583A successfully refreshed from Google Patents.
US4933583A
Expired / Lapsed
US
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Rotor having balance weights
Assignee: Frankl and Kirchner GmbH and Co KG
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Filing: 1989-03-09
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Granted: 1990-06-12
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Expires: 2009-03-09
Abstract
Abstract A rotor for an electric motor, energized by a permanent magnet, has an essentially cylindrical rotor body (1), with shaft sections (7, 8) coaxially distant from the rotor body (1). Permanent magnets (21) are fastened to the outer periphery (16) of the rotor body (1). In order to counterbalance the rotor, balance weight rings (6), in which weights (26) are inserted and which are disposed on seat sections (5) formed on the rotor body (1), are mounted on the rotor body (1).
Inventors
- 👤 Walter Ripplinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:07
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/27; H02K1/2706; H02K1/272; H02K1/274; H02K1/2753; H02K1/278; F; F16; F16F; F16F15/00; F16F15/32; F16F15/322; H02K7/00; H02K7/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
108 words
A rotor for an electric motor, said rotor comprising an essentially cylindrical rotor body having a central longitudinal axis, an essentially cylindrical outer surface concentric to said axis, axially opposed end faces, and a pair of axially opposed seat sections integral with said rotor body, permanent magnets disposed on said outer surface, balance weight rings disposed on said seat sections concentrically with said axis and adjacent to respective end faces, each said balance weight ring having a recess which flares to an opening facing the adjacent end face, and balance weights accommodated in respective recesses, said weights each having an external shape which conforms to the respective recess.
Claim 2
Dependent Claim
108 words
A rotor for an electric motor, said rotor comprising an essentially cylindrical rotor body having a central longitudinal axis, an essentially cylindrical outer surface concentric to said axis, axially opposed end faces, and a pair of axially opposed seat sections integral with said rotor body, permanent magnets disposed on said outer surface, balance weight rings disposed on said seat sections concentrically with said axis and adjacent to respective end faces, each said balance weight ring having a recess which flares to an opening facing the adjacent end face, and balance weights accommodated in respective recesses, said weights each having an external shape which conforms to the respective recess.
Claim 3
Dependent Claim
23 words
The rotor of claim 1, wherein each seat section (5) immediately adjoins the respective end face (3, 4) of the rotor body (1).
Claim 4
Dependent Claim
22 words
The rotor of claim 2, characterized in that each balance weight ring (6) lies directly against the respective end face (3, 4).
Claim 5
Dependent Claim
20 words
The rotor of claim 1, characterized in that each recess (24) is formed in the shape of a truncated cone.
Claim 6
Dependent Claim
16 words
The rotor of claim 1, wherein balance weight rings (6) consist of an elastic, synthetic material.
Claim 7
Dependent Claim
20 words
The rotor of claim 1, characterized in that the external shape of all weights is the same regardless of weight.
Claim 8
Dependent Claim
21 words
The rotor of claim 1, wherein balance weight rings (6) are provided with contacting openings (27) for twisting and/or pull-off keys.
Claim 9
Dependent Claim
29 words
The rotor of claim 1 further comprising means for retaining each balance weight ring against the adjacent end face, whereby said balance weights are retained in the respective recesses.
Claim 10
Dependent Claim
40 words
The rotor of claim 1 further comprising, a protective metal sheath provided concentrically about said permanent magnets and at least partially overlapping the balance weight rings in the axial direction, said sheath being positively connected to said balance weight rings.
Claim 11
Dependent Claim
25 words
The rotor of claim 9 wherein the protective sheath (23) is connected with each balance weight ring (6) by means of a flanged edge (31).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-11 | 2001-12-11 | 2002-06-12 | $7700.00 | Window Closed / Lapsed |