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:
May. 25, 2010
Filed:
Dec. 19, 2006
Charles P. Schumacher, Cedarburg, WI (US);
Alexander Krasny, Eagan, MN (US);
Heinz Ulrich Worthmann, Lino Lakes, MN (US);
Robert Benjamin Durand, Plymouth, MN (US);
Carl Phillip Quist, Maplewood, MN (US);
Charles P. Schumacher, Cedarburg, WI (US);
Alexander Krasny, Eagan, MN (US);
Heinz Ulrich Worthmann, Lino Lakes, MN (US);
Robert Benjamin Durand, Plymouth, MN (US);
Carl Phillip Quist, Maplewood, MN (US);
Schwing America, Inc., White Bear Lake, MN (US);
Abstract
A concrete transit mixer truck includes a control system that automatically controls rotation of the mixer drum at a constant drum speed when the mixer truck is traveling. When sensed speed of the truck exceeds a threshold, the control system automatically causes a hydraulic system to rotate the drum at a constant speed, regardless of the truck engine speed.