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:
Feb. 06, 2007
Filed:
Sep. 16, 2005
Todd J. Lutz, Oconomowoc, WI (US);
Gregory Kruepke, Waukesha, WI (US);
Darrin W. Dauffenbach, Pewaukee, WI (US);
Richard D. Goldberg, Hartford, WI (US);
Todd J. Lutz, Oconomowoc, WI (US);
Gregory Kruepke, Waukesha, WI (US);
Darrin W. Dauffenbach, Pewaukee, WI (US);
Richard D. Goldberg, Hartford, WI (US);
Wacker Corporation, Menomonee Falls, WI (US);
Abstract
A method is provided of making and using a walk behind rotary trowel that is 'dynamically balanced' so as to minimize the forces/torque that the operator must endure to control and guide the trowel. Characteristics that are accounted for by this method include, but are not limited to, friction, engine torque, machine center of gravity, and guide handle position. As a result, dynamic balancing and consequent force/torque reduction were found to result when the machine's center of gravity was shifted substantially relative to a typical machine's center of gravity. Dynamic balancing can be achieved most practically by reversing the orientation of the engine relative to the guide handle assembly when compared to traditional walk behind rotary trowels and shifting the engine as far as practical to the right. This shifting has been found to reduce the operational forces and torque the operator must endure by at least 50% when compared to traditional machines.