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US4823235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earth connection device in metal core printed circuit board
Assignee: Fujitsu Ltd
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Filing: 1987-02-06
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Granted: 1989-04-18
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Expires: 2007-02-06
Abstract
Abstract A device for providing an earth connection in a metal core printed circuit board (2) which is assembled in a shield casing (1) and which has an earth pattern (23) and a metal core (21), includes conductive connecting members (3) having one end soldered to the earth pattern (23) and another end in surface contact with the metal core (21) and the shield casing (1).
Inventors
- 👤 Mitsuaki Suzuki
- 👤 Katsuyuki Arai
- 👤 Yasushi Kojima
- 👤 Mitsusada Toyama
- 👤 Jun Sakiura
- 👤 Hisao Hayashi
- 👤 Hiroshi Yamaji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:02
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0007; H05K9/002; H05K9/0039
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
80 words
A device for providing an earth connection in a printed circuit board and which said board has a metal core and an earth pattern, said device comprising: a conductive shield casing; and at least one conductive connecting member which is soldered to the earth pattern and which said connecting member is in surface contact with the metal core and comes into surface contact with the conductive shield casing when the printed circuit board is assembled in the conductive shield casing.
Claim 2
Independent Claim
80 words
A device for providing an earth connection in a printed circuit board and which said board has a metal core and an earth pattern, said device comprising: a conductive shield casing; and at least one conductive connecting member which is soldered to the earth pattern and which said connecting member is in surface contact with the metal core and comes into surface contact with the conductive shield casing when the printed circuit board is assembled in the conductive shield casing.
Claim 3
Dependent Claim
31 words
A device for providing an earth connection according to claim 1, wherein said metal core has at least one exposed surface portion with which said connecting member is in surface contact.
Claim 4
Dependent Claim
36 words
A device for providing an earth connection according to claim 2, wherein said connecting member is elastically deformable to press into surface contact with said exposed surface portion of said metal core and said shield casing.
Claim 5
Dependent Claim
18 words
A device for providing an earth connection according to claim 3, wherein said connecting member is substantially hook-shaped.
Claim 6
Dependent Claim
26 words
A device for providing an earth connection according to claim 3, wherein said connecting member has an elastic holding portion for holding the printed circuit board.
Claim 7
Dependent Claim
77 words
A device for providing an earth connection according to claim 2, further comprising coaxial connectors and feedthrough capacitors wherein said shield casing has opposed flanges and wherein said metal core is provided with extensions which are located on said flanges, said coaxial connectors and feedthrough capacitors being directly mounted onto said extensions of said metal core, and wherein said shield casing includes a bottom plate and said connecting member comes into surface contact with the bottom plate.
Claim 8
Dependent Claim
44 words
A device for providing an earth connection according to claim 3, wherein said connecting member has a flexible leg which presses into surface contact with an inner surface of the shield casing when the printed circuit board is assembled in the conductive shield casing.
Claim 9
Dependent Claim
55 words
A device for providing an earth connection according to claim 3, wherein the shield casing has an inner side wall, and wherein said connecting member has a flexible end which presses into surface contact with the inner side wall of said shield casing when the printed circuit board is assembled in the conductive shield casing.
Claim 10
Dependent Claim
74 words
A device for providing an earth connection according to claim 3, wherein said shield casing is a shelf in which the printed circuit board is inserted and which said shelf has conductive guide means for guiding an insertion of said printed circuit board, and wherein said connecting member has a flexible free end which is fitted in and electrically connected to the guide means when the printed circuit board is inserted in said shelf.
Claim 11
Dependent Claim
30 words
A device for providing an earth connection according to claim 1, wherein the earth connection is established at a plurality of locations by means of a plurality of connecting members.
References Cited (Backward Citations)
US4336100A
Cited
JPS5619835A
Cited
JPS5654631A
Cited
JPS57155799A
Cited
JPS5835993A
Cited
JPS58195484A
Cited
JPH0638320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |