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:
Dec. 11, 2001
Filed:
Jul. 17, 2000
Applicant:
Inventors:
Geoff Turner, School Aycliffe, GB;
Rudi Birk, Altenstadt, DE;
Assignee:
Black & Decker Inc., Newark, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B 5/102 ;
U.S. Cl.
CPC ...
B23B 5/102 ;
Abstract
A masonry drill bit,having an active diameter of D, comprising a shaft,and a tip,for engaging a workpiece, the tip,including a central portion,extending ahead of an outer portion,, wherein the central portion,has a width of at least 0.25D and is shaped to act as a chisel during percussion drilling, and wherein the outer portion,is shaped to cut a workpiece as the drill bit rotates. By virtue of the drill bit tip,configuration as described and claimed herein, a masonry drill bit,having improved performance is provided.