Source: http://www.google.com/patents/US6696639?dq=6,108,703
Timestamp: 2015-04-26 22:33:13
Document Index: 750456823

Matched Legal Cases: ['art 31', 'art 32', 'art 31', 'art 32', 'arts 31', 'arts 31']

Patent US6696639 - Protecting device against interfering electromagnetic radiation comprising ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsThe object of the invention is an elongated EMI gasket (electromagnetic interference), made from an electroconductive material, which is characterised in that the cross-section of said wire (20-23) comprises a shape (24,25, 27) that protrudes from a specific basic cross-section. The object of the invention...http://www.google.com/patents/US6696639?utm_source=gb-gplus-sharePatent US6696639 - Protecting device against interfering electromagnetic radiation comprising EMI-gasketsAdvanced Patent SearchPublication numberUS6696639 B1Publication typeGrantApplication numberUS 10/018,035PCT numberPCT/FI2000/000568Publication dateFeb 24, 2004Filing dateJun 22, 2000Priority dateJun 24, 1999Fee statusPaidAlso published asDE60001572D1, DE60001572T2, EP1188355A1, EP1188355B1, WO2001001743A1Publication number018035, 10018035, PCT/2000/568, PCT/FI/0/000568, PCT/FI/0/00568, PCT/FI/2000/000568, PCT/FI/2000/00568, PCT/FI0/000568, PCT/FI0/00568, PCT/FI0000568, PCT/FI000568, PCT/FI2000/000568, PCT/FI2000/00568, PCT/FI2000000568, PCT/FI200000568, US 6696639 B1, US 6696639B1, US-B1-6696639, US6696639 B1, US6696639B1InventorsReijo NurmiOriginal AssigneeNokia CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (35), Referenced by (6), Classifications (15), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetProtecting device against interfering electromagnetic radiation comprising EMI-gaskets
One problematic area in EMI shielding is the sealing of junctions and joint surfaces comprised by devices, device cabinets and boxes. If the joint surfaces are not properly sealed with EMI gaskets, interfering electromagnetic radiation will quite easily pass through the joint. The best protection against interference is achieved when the joint surfaces are tightly sealed together galvanically. This means that resistance between the joint surfaces, so-called �junction resistance�, is as low as possible. However, it is difficult and expensive to manufacture such plane-like joint surfaces, where the surfaces are tightly attached to each other in every place galvanically. Therefore, solutions in which a good contact between the joint surfaces is not formed in every place but at certain distances along the whole length of the joint, are used for sealing joint surfaces. When the distance between the contacts formed is sufficiently short, electromagnetic radiation can no longer penetrate the joint in disturbing quantities. A sufficient contact distance depends on the frequency of the interfering radiation and the required attenuation level. Mechanical properties and the available space also affect the contact distance used. In connection with device cabinets and racks, a typical contact distance can be, e.g. 5-15 mm.
The cabinet to be sealed is preferably made from an electroconductive material. The cabinet comprises a specific first part 31 and a specific second part 32. FIG. 4a illustrates a situation, where an EMI gasket 30 according to the invention is placed in the space between said first part 31 and said second part 32. The diameter of the gasket 30 is preferably so big that when the gasket is freely in between said first and second parts 31, 32, the parts cannot get into direct contact with each other. The cross-sectional diagram according to the section A�A made in FIG. 4a before pressing the joint surfaces against each other is shown in FIG. 4b. When pressing the parts 31, 32 against each other, the EMI gasket placed between them will compress in the direction that is perpendicular to the longitudinal axis of the EMI gasket 30. This appears from FIG. 4c, which shows the cross-sectional diagram according to the section A�A after pressing.
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Co., Ltd.Device for mounting computer expansion slot coversCH668527A5 Title not availableDE1849258A Title not availableDE19701690A1Jan 20, 1997Jul 23, 1998Nsm AgMetal esp aluminium container for receiving electrical module such as record-replay deviceEP0447628A1Nov 27, 1990Sep 25, 1991Eurocopter Deutschland Gesellschaft mit beschr�nkter HaftungContact sealEP0889686A1Jun 29, 1998Jan 7, 1999Alcatel Alsthom Compagnie Generale D'electriciteElectromagnetic seal for a mobile wallGB1505579A Title not availableGB2222913A Title not availableJPH10173382A Title not availableJPS56158202A Title not availableWO1994030035A1Jun 2, 1994Dec 22, 1994Nokia Telecommunications OyInsulator means for suppressing interference radiation in an electric field* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS7491898 *Jan 2, 2007Feb 17, 2009Daniel VillanellaRadio frequency shielding arrangementUS8128416Mar 8, 2010Mar 6, 2012Saint-Gobain Performance Plastics CorporationLinear motion electrical connector assemblyUS8822842 *Oct 14, 2011Sep 2, 2014Innochips Technology Co., Ltd.EMI shielding gasketUS8907229 *Oct 14, 2011Dec 9, 2014Innochips Technology Co., Ltd.EMI shielding gasketUS20120090885 *Oct 14, 2011Apr 19, 2012Innochips Technology Co., Ltd.Emi shielding gasketUS20120090886 *Oct 14, 2011Apr 19, 2012Innochips Technology Co., Ltd.Emi shielding gasket* Cited by examinerClassifications U.S. Classification174/363, 277/920, 174/390International ClassificationB21B1/16, F16J15/06, H05K9/00, B21C37/04Cooperative ClassificationY10S277/92, B21C37/045, B21B1/16, H05K9/0015, F16J15/064European ClassificationH05K9/00B2, B21C37/04C, F16J15/06DLegal EventsDateCodeEventDescriptionJul 27, 2011FPAYFee paymentYear of fee payment: 8Jul 27, 2007FPAYFee paymentYear of fee payment: 4Feb 4, 2002ASAssignmentOwner name: NOKIA CORPORATION, FINLANDFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NURMI, REIJO;REEL/FRAME:012611/0312Effective date: 20020114Owner name: NOKIA CORPORATION KEILALAHDENTIE 4ESPOO, (1)FIN-0Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NURMI, REIJO /AR;REEL/FRAME:012611/0312RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services