The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 22, 2005
Filed:
Oct. 31, 2003
Akio Yamada, Tokyo, JP;
Kazuyuki Ozai, Tokyo, JP;
Shinya Ishizuka, Tokyo, JP;
Kazuhiro Sato, Tokyo, JP;
Akio Yamada, Tokyo, JP;
Kazuyuki Ozai, Tokyo, JP;
Shinya Ishizuka, Tokyo, JP;
Kazuhiro Sato, Tokyo, JP;
DDK Ltd., Tokyo, JP;
Abstract
A misconnection-proof key comprises a substantially L-shaped block made of a hard metal including a short arm and a long arm intersecting with the short arm at right angles thereto. The long arm has at a substantially mid portion on its surface a removal preventing protrusion integrally formed therewith. A plurality of misconnection-proof keys thus constructed are used in a connector including an insulating block having a number of contacts, and a metal shell partly covering the insulating block on the side of contact portions of the contacts. The plurality of misconnection-proof keys are each inserted with the long arm into a slot formed at a predetermined position between the insulating block and the metal shell until the removal preventing protrusion is fitted in a removal preventing recess or aperture formed in the slot so that the short arm of the key extending outwardly of the slot. The connector is prevented from being connected to a wrong or improper connector not having notches corresponding to the outwardly extending short arms of the misconnection-proof keys.