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:
Apr. 24, 2001
Filed:
Jul. 14, 1999
Jürgen Häberlein, Murrhardt, DE;
Andreas Stihl AG & Co., Waiblingen, DE;
Abstract
The invention is directed to a reciprocating internal combustion engine including a four-stroke engine. A longitudinally movable piston drives a crankshaft via a crank drive and a connecting rod. The crankshaft is journalled in a crankcase containing a lubricating oil for the crank drive. The chamber containing the lubricating oil is formed adjacent the cylinder by barrier walls within the crankcase as an oil receptacle to hold the lubricating oil in the overhead position of the cylinder. The crankcase is configured to have a trough-like shape and holds the lubricating oil and the cylinder projects axially into the crankcase and defines the barrier wall of the oil receptacle with its cylinder jacket. In this way, adequate lubrication is guaranteed in every operating position of the engine.