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:
Mar. 29, 2016
Filed:
Aug. 26, 2011
Lei YE, Chongqing, CN;
Jian Zhou, Chongqing, CN;
Hua Feng, Chongqing, CN;
Fei LI, Chongqing, CN;
Hengyang Zhu, Chongqing, CN;
Congxiao LI, Chongqing, CN;
Lei Ye, Chongqing, CN;
Jian Zhou, Chongqing, CN;
Hua Feng, Chongqing, CN;
Fei Li, Chongqing, CN;
Hengyang Zhu, Chongqing, CN;
Congxiao Li, Chongqing, CN;
CHONGQING RUNZE PHARMACEUTICAL CO., LTD., Chongqing, CN;
Abstract
A drill bit locking device and a drill bit are provided. The locking device includes a boss with a through hole, a bearing and a support member are arranged an inner wall of a small cylinder above the boss; a locking sleeve is sleeved over the boss, a first bulge is on an inner wall of an upper part of the locking sleeve, and a second bulge is on an inner wall of a lower part; a spring is between the second bulge and an upper bottom surface of the boss; a press plate is threadedly connected with an outer wall of a top part of the small cylinder and presses against the first bulge; holes of different sizes are on the inner wall of the small cylinder and the support member to form a stepped hole, and a steel ball is arranged in the stepped hole.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile