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:
Apr. 06, 2021
Filed:
Feb. 02, 2019
Seed Technologies Corp., Ltd., Hunan, CN;
SEED TECHNOLOGIES CORP., LTD., Hunan, CN;
Abstract
A matrix body PDC drill bit includes a drill crown and a bit body, and further includes a combined limiting sleeve. A connecting block and a connecting sleeve are provided at a junction of the drill crown and the bit body; multiple engaging teeth and engaging grooves for defining circumferential rotation and mutual engagement are provided between the connecting sleeve and the connecting block; the combined limiting sleeve includes several sub-limiting sleeves which are combined and spliced along an outer peripheral surface of the connecting sleeve and are configured to fixedly connected into a whole; an inner side of each sub-limiting sleeve is provided with upper limiting bumps and lower limiting bumps; the connecting block is inserted into the connecting sleeve to allow the upper limiting bumps and the lower limiting bumps to abut against fixed end surfaces of the connecting block and the connecting sleeve, respectively.