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US4782311A Expired / Lapsed US ⏱️ 0.0 years remaining

Three terminal filter

Assignee: Murata Manufacturing Co Ltd
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Filing: 1987-05-27
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Granted: 1988-11-01
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Expires: 2007-05-27
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Abstract

Abstract A three terminal filter according to the present invention has a hot lead terminal provided with substantially U-shaped holding portions and a plate capacitor arranged between a pair of magnetic cores.

Inventors

  • 👤 Akira Ookubo

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 06:54
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/228; H01G4/40; H03; H03H; H03H1/00; H03H1/0007

Claims Analysis

Total Claims: 16
Claim 1
Independent Claim 163 words
A three terminal filter comprising: a hot lead terminal defined by a continuous conductor shaped to form a pair of substantially U-shaped first and second holding portions which are interconnected and spaced apart by a connecting portion and thereby held substantially parallel with each other to define therebetween a space, said U-shape of each of said first and second holding portions being defined by a pair of substantially parallel outer and inner leg portions interconnected by a head portion; a pair of magnetic cores each mounted on a respective one of said outer leg portions of said holding portions and held between said outer leg portion and the corresponding inner leg portion; a plate capacitor arranged between said magnetic cores in said space and having a pair of opposed electrodes, one of said electrodes being electrically connected to said hot lead terminal; and a ground lead terminal arranged between said magnetic cores and electrically connected with the other said electrode of said capacitor.
Claim 2
Dependent Claim 163 words
A three terminal filter comprising: a hot lead terminal defined by a continuous conductor shaped to form a pair of substantially U-shaped first and second holding portions which are interconnected and spaced apart by a connecting portion and thereby held substantially parallel with each other to define therebetween a space, said U-shape of each of said first and second holding portions being defined by a pair of substantially parallel outer and inner leg portions interconnected by a head portion; a pair of magnetic cores each mounted on a respective one of said outer leg portions of said holding portions and held between said outer leg portion and the corresponding inner leg portion; a plate capacitor arranged between said magnetic cores in said space and having a pair of opposed electrodes, one of said electrodes being electrically connected to said hot lead terminal; and a ground lead terminal arranged between said magnetic cores and electrically connected with the other said electrode of said capacitor.
Claim 3
Dependent Claim 23 words
A three terminal filter in accordance with claim 1, wherein said plate capacitor is arranged in contact with both said inner leg portions.
Claim 4
Dependent Claim 27 words
A three terminal filter in accordance with claim 1, wherein said plate capacitor is located entirely within a space defined by the thickness of said magnetic cores.
Claim 5
Dependent Claim 43 words
A three terminal filter in accordance with claim 3, wherein said head portions of said first and second holding portions are bent so that said outer and inner leg portions define respective planes which define a cavity in which said capacitor is arranged.
Claim 6
Dependent Claim 24 words
A three terminal filter in accordance with claim 1, wherein said plate capacitor and said magnetic cores are covered by an insulative armoring member.
Claim 7
Dependent Claim 37 words
A three terminal filter in accordance with claim 1, wherein said connecting portion is connected to a lower portion of said capacitor, and said ground lead terminal is also connected to said lower portion of said capacitor.
Claim 8
Dependent Claim 38 words
A three terminal filter in accordance with claim 1, wherein said pairs of substantially parallel outer and inner leg portions angle slightly toward one another as they extend away from said head portions and toward said connecting portion.
Claim 9
Dependent Claim 20 words
A three terminal filter in accordance with claim 1, wherein said capacitor is in the form of a rectangular plate.
Claim 10
Dependent Claim 201 words
A three terminal filter comprising: a hot lead defined by a continuous conductor shaped to form a pair of substantially U-shaped holding portions; each said holding portion being defined by a respective pair of outer and inner leg portions which are interconnected by a head portion at an upper side of said filter; said outer leg portions extending downward from a lower side of said filter to form a pair of hot terminals for said filter; said inner leg portions being interconnected and spaced apart and held substantially parallel to one another by a connecting portion of said hot lead at said lower side of said filter; a pair of magnetic cores each being held between said outer leg portion and the corresponding inner leg portion of a respective one of said holding portions; a substantially flat capacitor disposed in a space defined between said magnetic cores and having a pair of opposed electrodes, a first one of which is electrically connected to said hot lead; and a ground lead electrically connected to the second one of said electrodes and extending away from said lower side of said filter in said downward direction to form a ground terminal for said filter.
Claim 11
Dependent Claim 201 words
A three terminal filter comprising: a hot lead defined by a continuous conductor shaped to form a pair of substantially U-shaped holding portions; each said holding portion being defined by a respective pair of outer and inner leg portions which are interconnected by a head portion at an upper side of said filter; said outer leg portions extending downward from a lower side of said filter to form a pair of hot terminals for said filter; said inner leg portions being interconnected and spaced apart and held substantially parallel to one another by a connecting portion of said hot lead at said lower side of said filter; a pair of magnetic cores each being held between said outer leg portion and the corresponding inner leg portion of a respective one of said holding portions; a substantially flat capacitor disposed in a space defined between said magnetic cores and having a pair of opposed electrodes, a first one of which is electrically connected to said hot lead; and a ground lead electrically connected to the second one of said electrodes and extending away from said lower side of said filter in said downward direction to form a ground terminal for said filter.
Claim 12
Dependent Claim 29 words
A three terminal filter as in claim 9, wherein each said magnetic core has an axial through-hole in which a respective one of said outer leg portions is received.
Claim 13
Dependent Claim 33 words
A three terminal filter as in claim 9, wherein said first electrode of said capacitor is electrically connected to said connecting portion of said hot lead at said lower side of said filter.
Claim 14
Dependent Claim 45 words
A three terminal filter as in claim 11, wherein said ground lead is electrically connected to said second electrode at said lower side of said filter at a location opposing said connecting portion of said hot lead on the opposite side of said flat capacitor.
Claim 15
Dependent Claim 44 words
A three terminal filter as in claim 9, wherein said head portions of said holding portions are bent so that said two inner leg portions define a plane and said two outer leg portions define another plane, said capacitor being disposed between said planes.
Claim 16
Dependent Claim 32 words
A three terminal filter as in claim 9, wherein said outer leg portions angle slightly toward said inner leg portions as they extend away from said head portions in said downward direction.

References Cited (Backward Citations)

US4320364A Cited
US4563659A Cited
US4571561A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-11-01 1992-05-02 1992-11-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-11-01 1996-05-02 1996-11-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-11-01 2000-05-02 2000-11-01 $7700.00 Window Closed / Lapsed

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