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:
Sep. 05, 2000
Filed:
Oct. 08, 1998
Applicant:
Inventors:
Greg D Mercier, Bristol, VA (US);
Gary A Fuller, Abingdon, VA (US);
Brian K Widener, Bristol, VA (US);
Chris J McSharry, Ooltewa, TN (US);
Assignee:
Sandvik AB, Sandviken, SE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21C / ; E21C / ;
U.S. Cl.
CPC ...
299104 ; 299106 ; 299107 ;
Abstract
A cutter tool comprises a tool holder, a cutting bit mounted in a bore of the tool holder, and a washer disposed between the tool holder and the cutting bit. The washer is a conical (Belleville) washer which makes annular line contact with a shoulder of the cutting bit, and with an edge of the bore of the tool holder, in order to effectively seal-out fines from the bore.