Composite brake drum
AssigneeHayes Lemmerz International, Inc.
InventorsJerry Cullen, Ross S. Hill, James Wieland
Life of this patent
Estimating the term…
Abstract
A composite brake drum for a motor vehicle or the like. The brake drum has a drum body that is comprised of a first material, preferably a cast metal, such as gray iron. The drum body has a cylindrical section, a shoulder, and a mounting face. The brake drum also includes an annular band formed from a second material, preferably a stamped metal such as steel. The annular band encircles the cylindrical section of the drum body. The steel annular band is positioned in a mold apparatus and molten iron is introduced into a mold cavity defined thereby. The mold and annular band are maintained in a static condition during the casting process.
Claims20
A composite brake drum for use in a drum brake assembly comprising:
- a brake drum body formed from a first material and cast as one piece, said brake drum body including a mounting face, a shoulder extending from said mounting face, and a cylindrical section extending from said shoulder;
- and
- an annular band formed from a second material and having a peripheral edge extending radially inwards into the surface of said cylindrical section for securing said band to said brake drum body.
A method of manufacturing a composite brake drum comprising:
- providing a mold for a brake drum body;
- providing a flat piece of material made from a second material;
- forming the flat piece into an annular band having first and second radially inwardly turned peripheral edges and an inner surface disposed therebetween;
- placing the annular band within the mold;
- and
- delivering a first material into the mold such that the first material flows into the space defined by the mold and the inner surface of the band to form a cast drum body.
Dependencies are inferred from the claim text.