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:
Feb. 02, 2021
Filed:
Jun. 07, 2017
Applicant:
China University of Mining and Technology, Xuzhou, CN;
Inventors:
Assignee:
China University of Mining and Technology, Jiangsu, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21D 20/00 (2006.01); E21D 21/00 (2006.01); E21F 17/18 (2006.01); E21D 20/02 (2006.01); E21F 17/00 (2006.01); E21F 17/02 (2006.01); G01B 11/30 (2006.01);
U.S. Cl.
CPC ...
E21F 17/185 (2013.01); E21D 20/003 (2013.01); E21D 20/02 (2013.01); E21D 21/004 (2013.01); E21F 17/00 (2013.01); E21F 17/02 (2013.01); G01B 11/303 (2013.01); G01B 11/306 (2013.01);
Abstract
A reaming and self-rotating anchor rod includes a rod body, a drill bit, a connecting member, a tray, and a nut. One end the connecting member is snap-fixed to the tail part of the rod body, the other end of the connecting member is connected to an anchor rod bolter. The rod body has an annular protrusion at its middle part to block powder so that the powder fills up the clearance between the rod body and the coal mass. The drill bit has female threads and can be screwed into the front part of the rod body, and the drill bit has baffle pawls and spiral grooves on its side surface.