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:
Dec. 15, 1987
Filed:
Oct. 02, 1985
Arthur E Brown, Lake George, NY (US);
Other;
Abstract
A rotary crankshaft has multiple cranks. Each crank drives a reciprocating member in a cylinder or guideway via a con rod. Main counterweights are attached to the crankshaft and rotate therewith. Two contraweights rotate in the opposite direction from the crankshaft and at the same RPM as the crankshaft. The two contraweights are generally rotatably mounted on the crankshaft, coaxial therewith, and near each end of the crankshaft. The two contraweights are driven from the crankshaft by toothed gearing. The two contraweights plus the main counterweights combine forces so as to counterbalance the primary reciprocating inertia forces of a plurality of said reciprocating members. By proper adjustment of the size and angular location of both the main counterweights and the two contraweights, it is possible to obtain near perfect primary balance under any or all of the following conditions: