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:
Jan. 09, 2007
Filed:
Sep. 22, 2003
Klaus Bröckel, Sao Leopoldo, BR;
Hartmut Fischer, Remshalden, DE;
Heiko Rosskamp, Adelberg, DE;
Helmar Amend, Waiblingen, DE;
Igor Klaric, Korb, DE;
Klaus Bröckel, Sao Leopoldo, BR;
Hartmut Fischer, Remshalden, DE;
Heiko Rosskamp, Adelberg, DE;
Helmar Amend, Waiblingen, DE;
Igor Klaric, Korb, DE;
Andreas Stihl AG & Co. KG, Waiblingen, DE;
Abstract
A cylinder housing () is cast with a cylinder wall () in the making of a cylinder for an internal combustion engine. The cylinder wall delimits an interior space () for accommodating a reciprocating piston and, thereafter, a control window () is machined into the cylinder wall () as an opening of a transfer channel () into the interior space (). A two-stage machining for forming the control window () is provided in order to make possible a rapid and cost effective manufacture of the cylinder. In a first step with a work tool () having a rotating primary movement (), a breakthrough () is machined into the cylinder wall () and, in a second step with a work tool, the breakthrough () is widened to the wanted dimensions of the control window ().