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:
Jan. 26, 1993
Filed:
Feb. 03, 1992
John P Dorscht, Union, Ontario, CA;
Patrick J Hogan, London, Ontario, CA;
Other;
Abstract
A tub grinder is disclosed in which material which is already sufficiently small in size, primarily being abrasive aggregate or earthen material, may be discharged from the receptacle to bypass the comminution apparatus and thus substantially reduce wear thereto. A portion of the cylindrical wall of the receptacle is provided with classifying openings, for example by providing a screened opening as a band around the receptacle. The classifying openings permit material which is already smaller than the size of the openings to fall therethrough, thereby bypassing the comminution apparatus. Preferably, a conveyor is positioned beneath the receptacle, to catch and discharge the material which falls through the screen or other classifying openings to a pile located away from the receptacle. Sidewalls positioned on either side of the receptacle stop any material which is flung out to the side, and redirect it down onto the conveyer. The apparatus may be advantageously mounted on a trailer, for towing from site to site. In such an arrangement, it is advantageous to provide an integrated, transportable system, in which the receptacle is moveable between an operating position and a transportation position.