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:
Sep. 02, 2003
Filed:
Aug. 28, 2001
Takashi Irie, Nagoya, JP;
Masahiro Akizuki, Nagoya, JP;
Shigeru Ogawa, Nagoya, JP;
Kenji Sato, Nagoya, JP;
NGK Insulators, Ltd., , JP;
Abstract
A suspension insulator having a shed including an upper surface and an under surface has a pin fitting arranged at its center portion and projected from the under surface and a plurality of circular ribs arranged around the pin fitting in a concentric manner. In a first aspect of the invention, a resistance zone having a surface resistance (1 cm×1 cm) of not greater than 4 M&OHgr; and arranged on the under surface at an inner portion continuing from the pin fitting and a conductive zone arranged on the under surface at an outer peripheral portion of the resistance zone. In a second aspect of the invention, a resistance zone arranged on the under surface at an inner portion continuing from the pin fitting and existing between the pin fitting and an inner root portion of the rib.