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:
Oct. 24, 2023
Filed:
Nov. 28, 2022
Dongguan Yicheng Lighting Tech Co., Ltd., Guangdong, CN;
Jianwen Lei, Guangdong, CN;
DONGGUAN YICHENG LIGHTING TECH CO., LTD., Guangdong, CN;
Abstract
A glass stem for a highly waterproof LED filament lamp comprises an LED filament without being driven by external power, a glass flare tube, an exhaust tube, a first lead wire having a resistance element, and a second lead wire. The first lead wire is placed in the exhaust tube. The first lead wire, the second lead wire, the top of the exhaust tube, and the top of the glass flare tube are fusion-bonded together. A lower section of the exhaust tube is fused and cut off to an assembly-desired length and then fusion-sealed with the first lead wire to form a glass stem with the resistance element sealed in the middle of the exhaust tube. The first lead wire having the resistance element is disposed inside the exhaust tube, such that isolative insulation is generated between the first lead wire and a second lead wire.