Patent US5552756A successfully refreshed from Google Patents.
US5552756A
Expired / Lapsed
US
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Chip-type common mode choke coil
Assignee: Murata Manufacturing Co Ltd
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Filing: 1994-01-12
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Granted: 1996-09-03
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Expires: 2014-01-12
Abstract
Abstract In a chip type common mode choke coil, a plurality of non-magnetic sheets on which conductor lines are formed are laminated one on another to form a non-magnetic member, and the conductor lines are connected to form primary and secondary coils inside the non-magnetic member, and a pair of magnetic layers are formed on the upper and lower surface of the non-magnetic member, and magnetic cores are arranged substantially at the centers of the loops of the coils in such a manner that they penetrate the non-magnetic member and are connected to the pair of magnetic layers, whereby a closed magnetic path crossing the primary and secondary coils is formed.
Inventors
- 👤 Tomoaki Ushiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:02
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/041; H01F41/043; H01F17/00; H01F17/0006; H01F17/0013; H01F38/00; H01F38/48; H01F41/046; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075; Y10T29/49076
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
124 words
A chip type common mode choke coil, comprising: a non-magnetic member including a plurality of laminated non-magnetic sheets and a plurality of conductor lines formed on each of said laminated non-magnetic sheets, respectively; primary and secondary coils including a plurality of conductor lines formed on each of said laminated non-magnetic sheets, respectively, said plurality of conductor lines being connected to each other inside said non-magnetic member; a pair of magnetic layers arranged on upper and lower surfaces of said non-magnetic member, respectively; and magnetic cores arranged substantially at the centers of loops of said coils, said magnetic cores penetrating said non-magnetic member and being connected to said pair of magnetic layers to form a closed magnetic path which crosses said primary and secondary coils.
Claim 2
Dependent Claim
124 words
A chip type common mode choke coil, comprising: a non-magnetic member including a plurality of laminated non-magnetic sheets and a plurality of conductor lines formed on each of said laminated non-magnetic sheets, respectively; primary and secondary coils including a plurality of conductor lines formed on each of said laminated non-magnetic sheets, respectively, said plurality of conductor lines being connected to each other inside said non-magnetic member; a pair of magnetic layers arranged on upper and lower surfaces of said non-magnetic member, respectively; and magnetic cores arranged substantially at the centers of loops of said coils, said magnetic cores penetrating said non-magnetic member and being connected to said pair of magnetic layers to form a closed magnetic path which crosses said primary and secondary coils.
Claim 3
Dependent Claim
32 words
A chip type common mode choke coil as claimed in claim 1, wherein one conductor line is formed on each of said laminated non-magnetic sheets to form said primary and secondary coils.
Claim 4
Dependent Claim
35 words
A chip type common mode choke coil as claimed in claim 1, wherein first and second conductor lines are formed on each of said laminated non-magnetic sheets to form said primary and secondary coils, respectively.
Claim 5
Dependent Claim
135 words
A multiple chip type common mode choke coil, comprising: a single non-magnetic member including a plurality of laminated non-magnetic sheets; a plurality of common mode choke coil elements which comprise a plurality of primary and secondary coil sets including a plurality of conductor lines formed on each of said plurality of laminated non-magnetic sheets and connected to each other inside said single non-magnetic member; and magnetic cores arranged substantially at the centers of loops of said plurality set of primary and secondary coils and penetrating said non-magnetic members and being connected to said magnetic layers; and a pair of magnetic layers arranged on upper and lower surfaces of said non-magnetic member, respectively; wherein at least one of said pair of magnetic layers is divided into parts in correspondence to said common mode choke coil elements.
Claim 6
Dependent Claim
135 words
A multiple chip type common mode choke coil, comprising: a single non-magnetic member including a plurality of laminated non-magnetic sheets; a plurality of common mode choke coil elements which comprise a plurality of primary and secondary coil sets including a plurality of conductor lines formed on each of said plurality of laminated non-magnetic sheets and connected to each other inside said single non-magnetic member; and magnetic cores arranged substantially at the centers of loops of said plurality set of primary and secondary coils and penetrating said non-magnetic members and being connected to said magnetic layers; and a pair of magnetic layers arranged on upper and lower surfaces of said non-magnetic member, respectively; wherein at least one of said pair of magnetic layers is divided into parts in correspondence to said common mode choke coil elements.
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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) | 1999-09-03 | 2000-03-04 | 2000-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-09-03 | 2004-03-04 | 2004-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-09-03 | 2008-03-04 | 2008-09-03 | $7700.00 | Window Closed / Lapsed |