Patent ID: 8048509

Claim:
A laminated core comprising: a plurality of core pieces including: a) a first core piece having a thickness between first and second oppositely facing sides, the first core piece made from metal and formed with caulking projections each having a projecting length extending from one of the oppositely facing sides; and b) a second core piece made from metal and formed with connecting through holes that fit said caulking projections, said second core piece laminated under said first core piece, wherein each of the connecting through holes has a circumference at which at least one discrete cut out is formed, wherein the caulking projections on the first core piece are forced into the first connecting through holes so that a part of each of the caulking projections is deformed by biting into one of the discrete cut outs and the caulking projections are securely fixed in the connecting through holes to thereby maintain the first core piece and the second core piece together.