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:
May. 06, 1997
Filed:
Sep. 29, 1995
Daniel Paro, Kvevlax, FI;
Wartsila Diesel International Ltd. OY, Helsinki, FI;
Abstract
A method for manufacturing a crankshaft for a combustion engine with several cylinders, especially for a large diesel engine, the crankshaft including for each cylinder a crank web unit comprising crank webs transverse with regard to the crankshaft and a crank pin connecting the crank webs. Separate crank web units are assembled one at a time to a uniform shaft blank corresponding to the entire length of the crankshaft and having a different diameter in different points so that the diameter is at its biggest in the central part of the shaft blank and decreases towards the both ends thereof. First a crank web unit intended to the point of the shaft blank with the biggest diameter is installed and fixed to its place and after that crank web units intended always in the order of their diameter to the next biggest points are installed and fixed to both sides thereof. Lastly the portions located between the crank webs of each crank web unit at the position of the crank pin are machined away from the shaft blank.