Patent US6313557B1 successfully refreshed from Google Patents.
US6313557B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor of the electronic commutation type for applications with a feeder line
Assignee: Bitron SpA
•
Filing: 1999-05-25
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Granted: 2001-11-06
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Expires: 2019-05-25
Abstract
Abstract An electronic motor ( 1 ) of the electronic commutation type provided with a rotor ( 5 ) presenting a centre of rotation (C 0 ) and a number of radial teeth ( 16 ) located along respective radial directrixes (K) passing through the centre of rotation (C 0 ) and radially limited by a surface ( 35 ) presenting a bending centre (C 1 ) located at any point along a radial directrixx (K) with the exception of a part (T 1 ) included between said centre of rotation (C 0 ) and the surface ( 35 ) itself excluding the centre of rotation (C 0 ) and the internal surface ( 35 ).
Inventors
- 👤 Pietro De Filippis
- 👤 Sergio Casti
- 👤 Giancarlo Fasola
- 👤 Flavio Maggi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:48
CPC Classifications
H; H02; H02K; H02K21/00; H02K21/12; H02K21/14; H02K21/16; H02K1/00; H02K1/06; H02K1/12; H02K1/14; H02K1/146; H02K1/148; H02K15/00; H02K15/02; H02K15/021; H02K15/022
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
181 words
An electronic commutation motor ( 1 ) for applications with a feeder line comprising a rotor ( 5 ) rotating around an axis (A) of rotation, and a number of stator teeth ( 16 ) ( 50 ) uniformly distributed around the axis (A) of rotation along a respective radial directrix (K) projecting from a centre of rotation (C 0 ) of the rotor ( 5 ) located on the axis (A) of rotation, each stator tooth ( 16 ) ( 50 ) presenting a respective internal cylindrical surface ( 35 ) facing said rotor and radially limiting the tooth ( 16 ) ( 50 ); the motor ( 1 ) being characterized in that said internal surface ( 35 ) presents a bending centre (C 1 ) (C 2 ) located at any point along the respective radial directix (K) with exception of a part (T 1 ) included between said centre of rotation (C 0 ) and the internal surface ( 35 ) and excluding the centre of rotation (C 0 ) and the internal surface ( 35 ).
Claim 2
Dependent Claim
181 words
An electronic commutation motor ( 1 ) for applications with a feeder line comprising a rotor ( 5 ) rotating around an axis (A) of rotation, and a number of stator teeth ( 16 ) ( 50 ) uniformly distributed around the axis (A) of rotation along a respective radial directrix (K) projecting from a centre of rotation (C 0 ) of the rotor ( 5 ) located on the axis (A) of rotation, each stator tooth ( 16 ) ( 50 ) presenting a respective internal cylindrical surface ( 35 ) facing said rotor and radially limiting the tooth ( 16 ) ( 50 ); the motor ( 1 ) being characterized in that said internal surface ( 35 ) presents a bending centre (C 1 ) (C 2 ) located at any point along the respective radial directix (K) with exception of a part (T 1 ) included between said centre of rotation (C 0 ) and the internal surface ( 35 ) and excluding the centre of rotation (C 0 ) and the internal surface ( 35 ).
Claim 3
Dependent Claim
31 words
A motor as claimed in claim 1 , characterized in that said bending centre (C 1 ) is located radially towards an external part of the internal surface ( 35 ).
Claim 4
Dependent Claim
45 words
A motor as claimed in claim 2 , characterized in that said rotor comprises a number of permanent magnets ( 12 ) uniformly distributed around said axis (A) of rotation, and each permanent magnet located at a determined distance (D) from an adjacent permanent magnet.
Claim 5
Dependent Claim
62 words
A motor as claimed in claim 3 , characterized in that each magnet ( 12 ) presents a cylindrical external surface ( 13 ) and two side surfaces ( 14 ) located, in relationship to the side surfaces ( 14 ) of the two adjacent magnets ( 12 ), at said distance (D) parallel to the two side surfaces ( 14 ).
Claim 6
Dependent Claim
38 words
A motor as claimed in claim 4 , characterized in that the two side surfaces of each magnet ( 12 ) define with the relative external cylindrical surface ( 13 ) two beveled union corners ( 15 ).
Claim 7
Dependent Claim
40 words
A motor as claimed in claim 1 , characterized in that said bending centre (C 2 ) is located on the same side as the centre of rotation (C 0 ) in relationship to the internal surface ( 35 ).
Claim 8
Dependent Claim
119 words
A motor as claim 1 , characterized in that it comprises at least one inductor ( 4 ) to limit a harmonic content of a line current, and a case ( 18 ) containing said stator teeth ( 16 ) ( 50 ) made, together with the stator teeth ( 16 ) ( 50 ) and said rotor ( 5 ), from a number of closely-packed metal laminations ( 7 ); said inductor ( 4 ) being made by a coil ( 27 a ) wound around a tooth ( 26 ) extending towards an external part of said case ( 18 ) and by a C shaped cover ( 28 ) coupled to said tooth ( 26 ).
Claim 9
Dependent Claim
44 words
A motor as claimed in claim 7 , characterized in that each lamination ( 7 ) is made by shearing a metal strap, and comprises at least a C shaped intermediate segment ( 43 ) defining a portion of said cover ( 28 ).
Claim 10
Dependent Claim
90 words
A motor as claimed in claim 7 , characterized in that it comprises a transformer ( 49 ) located on a control electronics and comprising, in turn, four joint elements ( 45 ) united among them, and two reels ( 48 ) coupled to two of the four joint elements ( 45 ); each lamination ( 7 ) being made by shearing a metal strap ( 8 ) and including at least four identical elements ( 44 ) which can be piled to define said joint elements ( 45 ).
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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) | 2004-11-05 | 2005-05-07 | 2005-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-11-05 | 2009-05-07 | 2009-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-11-05 | 2013-05-07 | 2013-11-06 | $7700.00 | Window Closed / Lapsed |