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:
Jan. 01, 2019
Filed:
Apr. 21, 2017
Zhejiang Sanou Machinery Co. Ltd., Zhejiang, CN;
ZHEJIANG SANOU MACHINERY CO. LTD., Zhejiang, CN;
Abstract
The present invention provide a self-locking drill chuck, its rotating sleeve is provided with a convex leaf spring fixed to a rotating sleeve at both ends, its nut or ring fixedly connected with the nut are provided with a first groove and a second groove matching with the convex portion of the leaf spring; the self-locking structure includes a ring tooth on the drill body and rotatable locking block arranged on the nut or ring fixedly connected to the nut, the nut or ring fixedly connected to the nut is provided with a leaf spring, the rotating sleeve is provided with a first part compressing the leaf spring and a second part compressing the locking block. This invention can achieve positioning matching between metals, which has a stronger holding force for maintaining self-locking state of the drill chuck, greatly enhancing the operating feel.