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:
Sep. 25, 2001
Filed:
Dec. 28, 1999
Andreas Stihl AG & Co., , DE;
Abstract
An internal combustion engine for a work tool has a cylinder with a combustion chamber. A piston is reciprocatingly mounted in the cylinder and delimits the combustion chamber. The crankshaft has bearing pins and at least one crank web. The bearing pin has a mounting end, and the crank web has a first receiving bore and a second receiving bore. The mounting end of the bearing pin is mounted in the first receiving bore. A crankcase is provided in which the crankshaft is rotatably mounted by the bearing pins. The crankshaft has a crank pin with a mounting end that is mounted in the second receiving bore of the crank web. A connecting rod has a first end connected to the piston and a second end connected to the crank pin. The crank pin has a longitudinal center axis and the crankshaft has an axis of rotation extending parallel to the longitudinal center axis. The longitudinal center axis and the axis of rotation are spaced at a stroke spacing from one another. The stroke spacing is identical to or smaller than the sum of the bearing pin radius of the mounting end of the bearing pin and a crank pin radius of the mounting end of the crank pin. The bearing pin radius and the crank pin radius are measured in the plane of the crank web.