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:
Aug. 13, 1991
Filed:
Jan. 10, 1991
Applicant:
Inventors:
Roger Burns, Wauwatosa, WI (US);
Donald T Szopinski, Hartland, WI (US);
Assignee:
Briggs & Stratton Corporation, Wauwatosa, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02B / ;
U.S. Cl.
CPC ...
1231 / ; 74603 ;
Abstract
A balancing system for both horizontal and vertical shaft engines has a drive gear attached to the crankshaft, a driven gear disposed on and freely rotatable from the camshaft, and a counterbalance weight attached to the driven gear. The rotation of the crankshaft and the drive gear causes the driven gear and the counterbalance weight to rotate at crankshaft speed and in the opposite direction from the crankshaft. Substantial cost savings are achieved since the balancing system does not require any additional shafts and minimizes the number of gears needed to achieve balancing.