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:
Jul. 27, 1999
Filed:
Mar. 25, 1997
Mark A Kollock, Fond du Lac, WI (US);
Brunswick Corporation, Lake Forest, IL (US);
Abstract
An engine for use in a marine propulsion system for use on a boat having a force balancer mechanism for off-setting the shaking force created by the reciprocating pistons. In a two-cylinder, four-stroke marine engine, a pair of reciprocating pistons move in unison within respective cylinders. The force balancer mechanism is mounted to the rotating crankshaft such that rotation of the crankshaft results in reciprocating movement of the balance weight in a direction opposite the pair of pistons. The balance weight of the force balancer mechanism is contained within a balance weight housing formed in the engine block. The weight of the balance weight and the distance of the balance weight from the axis of rotation of the crankshaft are selected to optimally reduce the amount of shaking force in the engine.