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:
Apr. 21, 1992
Filed:
Sep. 07, 1990
Michael L O'Neill, Lucinda, PA (US);
Joy Technologies Inc., Pittsburgh, PA (US);
Abstract
A mining bit holding system is provided which includes a bit holder which attaches to the rotatable drum of a mining machine. The bit holder includes a base portion and a body portion. The body portion has an aperture therethrough to receive a coaxial sleeve. The sleeve has a bore therethrough for rotatably receiving a cutting bit. The sleeve and bit holder are constructed such that the angular position of the sleeve may be fixed relative to the common axis of the aperture in the sleeve in any one of a plurality of discrete positions. Additionally, the sleeve and bit holder are constructed such that the sleeve may be rotated with respect to the axis of the aperture the body portion to another position and then fixed in that position.