Close tolerance crankshaft oil scraper

Abstract

The invention allows the well-known class of crankcase oil windage control devices known as “crank scrapers” to achieve greater efficiency. The efficiency of a scraper is inversely related to the clearance present with moving parts sweeping past it. Typically constructed of metal, scrapers have had recommended running clearances of 0.035″ to 0.060″ for many decades. By using a material in the scraper than can safely contact the moving parts this clearance can be reduced to zero. Many versions of this new class of device built by the inventor have been tested and are in successful use worldwide in passenger car and racing engines.

1 . A “Close Tolerance Crankshaft Oil Scraper” is a well-defined class of device that can directly and safely contact moving parts to physically remove crankcase windage oil in engines. Members of this class comprising: 
 1. a structure to securely locate the device with respect to the moving parts and    2. a material that can contact and not harm the moving parts.