Patent ID: 6722221
Filing Date: 2004-04-20
Classification: F01L,Y10S,Y10T

Abstract:
An adjustable cam shaft sprocket, comprising:a shear pin; a first circular member having a toothed outer surface for receiving a timing chain, a first cam shaft opening, and a recessed planar surface having a first number of openings located proximate to a perimeter of said recessed planar surface; and a second circular member having a second planar surface and a cylindrical portion extending perpendicularly from said second planar surface, said second planar surface having a cam shaft opening extending through said cylindrical portion and a second number of openings located proximate to a perimeter of said second planar surface comprising a reference opening, openings located in clockwise proximity to said reference opening, and openings located in counter-clockwise proximity to said reference opening, said reference opening representing zero degrees of adjustment, said clockwise reference openings representing negative increments of adjustment, and said counter-clockwise openings representing positive increments of adjustment, said second circular member for being placed concentrically within said first circular member wherein said second circular member is prevented from rotating with respect to said first circular member by inserting said shear pin through one of said second number of openings and through one of said first number of openings; wherein said second circular member may be adjusted clockwise or counter-clockwise to achieve a positive or a negative adjustment to a cam timing angle by removing said shear pin and rotating said second circular member with respect to said first circular member such that a second one of said second number of openings is aligned with a second one of said first number of openings.