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:
Aug. 23, 2005
Filed:
Mar. 03, 2003
Tetsuya Mori, Shiga, JP;
Kenji Funaki, Ritto, JP;
Yasusuke Takahashi, Kumamoto, JP;
Kozo Maenishi, Nagaokakyo, JP;
Tetsuya Mori, Shiga, JP;
Kenji Funaki, Ritto, JP;
Yasusuke Takahashi, Kumamoto, JP;
Kozo Maenishi, Nagaokakyo, JP;
OMRON Corporation, Kyoto, JP;
Abstract
The invention intends to provide a direct current load breaking contact point constitution that can make and break an electrical circuit under both direct current loads of direct current resistance load and direct current inductance load over a long period of time without causing problems such as {circle around (1)} the conduction defect due to the consumption of the contact point, {circle around (2)} the locking due to material transfer from one contact point to the other contact point, {circle around (3)} the welding between the contact points, and {circle around (4)} the abnormal arc continuation, and a direct current load breaking switching mechanism such as a relay, a switch and so on that has the contact point constitution. The direct current load breaking contact point constitution according to the invention comprises a movable contact point and a stationary contact point that face each other; wherein the movable contact point is made of AgSnOInOalloy that contains at least Ag, 8 to 15% by weight in total of metal oxides including SnOand InO, 6 to 10% by weight of SnOand 1 to 5% by weight of InO; the stationary contact point is made of AgZnO alloy that contains at least Ag and 7 to 11% by weight of ZnO; and polarity of a movable side is (+) and that of a stationary side is (−).