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:
Jun. 11, 1996
Filed:
Feb. 06, 1995
Ernst O Kruse, Gottmadingen/Randegg, DE;
Christian Renner, Beringen, CH;
Georg Fischer Giessereianlagen AG, Schaffhausen, CH;
Abstract
An apparatus for mixing molding sand which comprises a mixing vessel having a mixing tool disposed within the mixing vessel, the mixing tool comprises an elongated shaft having a plurality of blades arranged along the elongated shaft wherein each of the plurality of blades comprises two opposed identical blade portions fitted to each other by a form fitting connection at a location adjacent the elongated shaft. The form fitting connection includes a groove and a lug on each of the opposed blade portions wherein the lug on one of the opposed blade portions engages the groove on the other opposed blade portion. The groove and lug form in part a peripheral surface of a polygonal recess on the form fitting connection which surface abuts the elongated shaft of the mixing tool when the opposed blade portions are secured to the shaft.