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.:

US 8403600 B1

PDF
Full Text
Expired
Date of Patent:
Mar. 26, 2013

Filed:

Oct. 26, 2007
Applicants:

Steven Weaver, Fletcher, AU;

Darren Webb, Floraville, AU;

John Horsch, Wallsend, AU;

Matthew Kenny, Hamilton, AU;

Inventors:

Steven Weaver, Fletcher, AU;

Darren Webb, Floraville, AU;

John Horsch, Wallsend, AU;

Matthew Kenny, Hamilton, AU;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21D 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A drilling tool incorporating first and second ends, a shaft extending between the ends. The first end has a drill bit to penetrate rock. The drill bit and the shaft have complementary threads. The drill bit and the shaft comprise a relative rotation stop means that ensures that the drill bit remains loose during drilling in a first direction. The invention further relates to a self drilling rock bolt, a drill bit, drill shaft and shaft coupling, an anchoring device, and an end coupling per se.


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Weaver, Steven. (2013). Drilling tool, a self-drilling rock bolt, a drill bit, an anchoring device for a self-drilling rock bolt, a shaft for a drilling tool and an end coupling for a drilling tool (U.S. Patent No. 8403600). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8403600

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