US 2003/0148839 A1Published application

Adjustable cam shaft sprocket

OwnerSteven Frank Maxwellinventor

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Abstract

An adjustable cam shaft sprocket for allowing small adjustments to a cam shaft. The adjustable cam shaft sprocket comprises an inner member and an outer member, the inner member being placed concentrically within said first circular member and held in place by a fastener. A series of openings located at the perimeter of the inner member and outer member are arranged such that only one pair of openings between the inner member and the outer member are aligned for each hole alignment. A shear pin is inserted through the aligned pair of openings to prevent the inner member from rotating with respect to the outer member. A small adjustment to the cam shaft is achieved by removing the shear pin, rotating the inner member with respect to the outer member so that a second pair of openings is aligned, and re-inserting the shear pin.

Claims18

Dependent claims

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, 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 incrementally with respect to said first circular member 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.

3 more elements

An adjustable cam shaft sprocket, comprising:

shear prevention means;
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, 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 prevention means 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 incrementally with respect to said first circular member by removing said shear prevention means 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.

3 more elements

Dependencies are inferred from the claim text.