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:
May. 27, 1980
Filed:
Oct. 13, 1978
William R Mahieu, Centralia, MO (US);
Other;
Abstract
An oil expulsion fuse has multiple rupture-resistant fuse wire arc bores for providing fault current protection in high voltage distribution circuits in the 25-35 KV range. In preferred forms, the fuse has a Teflon core defining three discrete, small diameter cylindrical bores, each containing a respective fuse wire, whereby sufficient deionizing gas flow is generated upon fusing of the wires to effectively extinguish arcs formed in the bores, even in the face of high recovery voltage rates associated with distribution voltages above 15 KV. The multiple bores communicate with common chambers at respective ends thereof which are vented to allow connective oil flow through the fuse during normal operation. One chamber has a larger effective vent area than the other and the chambers at opposite ends of the fuse intercommunicate so that upon sequential melting of the fuse wires which occurs during fault interruption, the greater resistance to gas expulsion at one end of the fuse than the other causes gas to be directed down through the bores to prevent arc restrike.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile