US6333459B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isolation apparatus for electronic equipment
Assignee: Panasonic Holdings Corp
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Filing: 1997-09-26
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Granted: 2001-12-25
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Expires: 2017-09-26
Abstract
Abstract An electromagnetic isolation apparatus for an electronic device such as a portable telephone is provided which includes first and second shield cases and elastic members such as rubber cushions. The first and second shield cases are disposed within a casing of the electronic device to surround at least part of both surfaces of a printed circuit board mounted within the electronic device. The elastic members are interposed between an inner wall of the casing of the electronic device and an outer surface of the first shield case and between the inner wall of the casing and an outer surface of the second shield case to produce elastic pressures urging the first and second shield cases into conductive engagement with the printed circuit board.
Inventors
- 👤 Noriyoshi Sato
- 👤 Shinichi Terao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:49
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/18; H04M1/185; H04M1/0202; H05; H05K; H05K9/00; H05K9/0007; H05K9/002; H05K9/0022; H05K9/0024; H05K9/0032; H05K9/0033; H05K9/0037; H04B; H04B1/00; H04B1/38; H04B1/3827; H04B1/3833; H04B2001/3894; H04M19/00; H04M19/02; H04M19/04; H04M19/047; Y; Y10; Y10S; Y10S174/00; Y10S174/35; Y10S277/00; Y10S277/92
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
262 words
An electromagnetic isolation apparatus for an electronic device having a casing within which a printed circuit board is mounted, the apparatus comprising: a first shield case disposed within the casing to cover at least a portion of a first surface of the printed circuit board, a second shield case disposed within the casing to cover at least a portion of a second surface of the printed circuit board, said second surface being opposite to the first surface; an elastic member interposed between an inner wall of the casing and a surface of one of said first and second shield cases so as to produce an elastic pressure urging said one of said first and second shield cases into engagement with a corresponding one of the first and second surfaces of the printed circuit board, and a conductive spring member interposed between said one of said first and second shield cases and said corresponding one of the first and second surfaces of the printed circuit board to establish conductive engagement therebetween, wherein said conductive spring member produces an elastic pressure urging said one of said first and second shield cases away from the printed circuit board against the elastic pressure provided by said elastic member, the elastic pressure provided by said conductive spring member being smaller than that provided by said elastic member so as to bring a portion of said one of said first and second shield cases and a portion of the corresponding one of said first and second surfaces of the printed circuit board into constant engagement with each other.
Claim 2
Dependent Claim
262 words
An electromagnetic isolation apparatus for an electronic device having a casing within which a printed circuit board is mounted, the apparatus comprising: a first shield case disposed within the casing to cover at least a portion of a first surface of the printed circuit board, a second shield case disposed within the casing to cover at least a portion of a second surface of the printed circuit board, said second surface being opposite to the first surface; an elastic member interposed between an inner wall of the casing and a surface of one of said first and second shield cases so as to produce an elastic pressure urging said one of said first and second shield cases into engagement with a corresponding one of the first and second surfaces of the printed circuit board, and a conductive spring member interposed between said one of said first and second shield cases and said corresponding one of the first and second surfaces of the printed circuit board to establish conductive engagement therebetween, wherein said conductive spring member produces an elastic pressure urging said one of said first and second shield cases away from the printed circuit board against the elastic pressure provided by said elastic member, the elastic pressure provided by said conductive spring member being smaller than that provided by said elastic member so as to bring a portion of said one of said first and second shield cases and a portion of the corresponding one of said first and second surfaces of the printed circuit board into constant engagement with each other.
Claim 3
Dependent Claim
79 words
An electromagnetic isolation apparatus as set forth in claim 1 , wherein said first and second shield cases respectively include first and second engaging means, said first and second engaging means engaging each other for attaching said first and second shield cases to each other to define an enclosed chamber therebetween, said conductive spring member producing said elastic pressure to urge said first and second engaging means into tight engagement with each other and to reduce any gap therebetween.
Claim 4
Dependent Claim
21 words
An electromagnetic isolation apparatus as set forth in claim 2 , wherein said first and second engaging means comprise claw structures.
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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) | 2004-12-24 | 2005-06-25 | 2005-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-12-24 | 2009-06-25 | 2009-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-12-24 | 2013-06-25 | 2013-12-25 | $7700.00 | Window Closed / Lapsed |