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:
Jul. 18, 1989
Filed:
Sep. 16, 1988
Norbert R Balzer, Troy, MI (US);
Tocco, Inc., Boaz, AL (US);
Abstract
A method and apparatus for installing steel liner sleeves in the cylinder bores of an aluminum engine block comprises axially sliding the liner sleeves onto slide portions of respective mandrels, over an inductor coil on the free outer end of each mandrel. After axially moving the mandrels to insert their inductor coils into the cylinder bores and then energizing the coils to inductively heat the walls of the cylinder bores to a predetermined elevated temperature to expand the bores to a diameter sufficient to axially receive the liner sleeves therein with a snug sliding fit, the coils are de-energized and the liner sleeves then immediately axially slid along the mandrels to a position over the de-energized coils and within the annular coupling gap space between the coils and the bore walls, and into their axially inserted position within the heated cylinder bores, in which position they are maintained until the cylinder bore walls cool and contract to form a tight shrink fit around the liner sleeves.