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. 10, 1981
Filed:
Dec. 03, 1979
Maurice K LeBegue, Argillite, KY (US);
Charles R Herron, Bluefield, VA (US);
National Mine Service Company, Pittsburgh, PA (US);
Abstract
A cutting tool assembly adapted for mounting on a driving mechanism of a mining machine to dislodge solid material in mining operations includes a base member rigidly secured as by welding to the driving mechanism. A cutter member having an elongated shank and a conical head is releasably positioned in a bore through the base member. The conical head extends from the upper end of the shank and supports a hard cutting tip that is operable to dislodge solid material from a mine face upon rotation of the driving mechanism. The shank has a tapered body positioned in a tapered portion of the base member bore. The surface of the tapered body cooperates with the bore tapered portion to form a locking fit of the shank in the base member substantially free of relative movement between the shank and the base member to prevent wear of the base member bore. A securing device engages the lower end of the shank to exert a downward force on the shank and urge the complementary surfaces of the shank and the base member into wedging engagement within the bore. Wear of the base member bore is thus substantially prevented resulting in an extended operating life of the base member and reduced downtime for replacing a worn base member.