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. 08, 1995
Filed:
Jun. 04, 1993
James L Bloemers, Bossier City, LA (US);
Other;
Abstract
A portable, work prooducing apparatus is powered by a single cylinder, two-stroke, internal combustion engine made substantially from aluminum. An exhaust port defined through a wall of the cylinder has inserted therein a steel sleeve with dimensions smaller than the exhaust port to create an air gap between the sleeve and the walls of the exhaust port. A muffler is fastened directly to the cylinder at the exhaust port. Fastening of the muffler acts to press the flange of the sleeve against the exterior of the cylinder, thereby retaining the sleeve within the exhaust port without additional fasteners and creating a good seal with the muffler. The steel and air insulate very hot exhaust gases from the cylinder to prevent overheating of the air-cooled cylinder in the area around the exhaust port that causes premature failure of lubricant and wear of the engine components.