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:
Dec. 16, 2025
Filed:
Jul. 11, 2023
Guangzhou Newlife New Material Co., Ltd., Guangdong, CN;
Kai Gong, Guangdong, CN;
Jianping Sun, Guangdong, CN;
Xiaojing He, Guangdong, CN;
Xuezhao Wang, Guangdong, CN;
Xiaoming Wang, Guangdong, CN;
GUANGZHOU NEWLIFE NEW MATERIAL CO., LTD., Guangzhou, CN;
Abstract
The present invention provides a ring varistor for use in DC micromotor including a ring varistor substrate having nonlinear volt-ampere characteristics and at least three independent electrodes evenly sintered on an end face of the ring varistor substrate. The electrode gap between two adjacent electrodes consists of two straight parallel edges of the two adjacent electrodes, and an inner and an outer concentric arc on the substrate ring, the electrode gap is not orthogonal to the ring. Due to the asymmetry arrangement of the surface electrodes and the electrode gaps, the electrode materials and the substrate materials with different thermal conductivity have no contact cross distribution with each other at the radial electrode gap. During welding, the heat shock is transmitted asymmetrically through the asymmetric electrodes, to improve the uniformity of the heat conduction distribution of the varistor and reduce the defective rate of the substrate welding fracture.