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. 29, 2000
Filed:
Jul. 21, 1999
Jurgen Haberlein, Murrhardt, DE;
Georg Becker, Schwaikheim, DE;
Andreas Stihl AG & Co., Waiblingen, DE;
Abstract
The invention relates to a reciprocating piston engine having a piston which moves upwardly and downwardly and which rotatably drives a crankshaft and components connected therewith via a connecting rod. The crankshaft is journalled in the crankcase which has a crankcase venting system to compensate pressure in the interior space of the crankcase. The venting system includes a venting line leading away from the interior space of the crankcase. The venting line is configured as a channel in a rotating component in order to achieve a functionally reliable pressure compensation with high separating action. The channel defines a connection between the interior space of the crankcase and the atmosphere. A valve is mounted in this channel and this valve becomes unblocked under the action of centrifugal force and seals the crankcase with respect to fluids when the engine is at standstill.