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. 30, 1980
Filed:
Dec. 06, 1978
Dieter Hoffmann, D-4320 Hattingen, Ruhr, DE;
Other;
Abstract
A mining auger includes an auger shaft having a front end, a conical end ring affixed to the front end of the auger and having a forwardly oriented face and a peripheral edge zone; a plurality of tool holders affixed to the peripheral edge zone in a circumferential distribution and each having a forwardly oriented face; and a cutting tool bit carried in each tool holder. Each cutting tool bit projects forwardly beyond a peripheral edge of the conical end ring and has a longitudinal axis extending at an inclined orientation with respect to an imaginary frontal plane which is perpendicular to the auger axis and which generally coincides with the mine wall face during operation. At least some of the tool holders carry a shearing tool bit each having an axis extending from the forwardly oriented face of the conical end ring in the direction of the frontal plane and further, each shearing tool bit has a tip which is at a significant distance from the forwardly oriented face of the respective tool holder.