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:
Nov. 26, 2019
Filed:
Jun. 07, 2017
Applicant:
China University of Mining and Technology, Xuzhou, CN;
Inventors:
Nong Zhang, Xuzhou, CN;
Changliang Han, Xuzhou, CN;
Ke Yang, Xuzhou, CN;
Zhengzheng Xie, Xuzhou, CN;
Assignee:
CHINA UNIVERSITY OF MINING AND TECHNOLOGY, Xuzhou, Jiangsu, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21D 20/00 (2006.01); E21D 21/00 (2006.01);
U.S. Cl.
CPC ...
E21D 20/003 (2013.01); E21D 21/0026 (2013.01); E21D 21/0053 (2016.01); E21D 21/0093 (2013.01);
Abstract
The present invention provides a self-drilling and self-anchoring extendable anchor rod applicable to soft and weak coal rocks and an anchoring method thereof, which are suitable for supporting soft and weak coal rock mass in roadways.