Patent ID: 6892690
Filing Date: 2005-05-17
Classification: F02F

Abstract:
1. A cooling channel cover for a one-piece piston of an internal combustion engine, having a closed cooling channel that runs around an inside region of a piston crown of the piston, at a level of a piston ring band, and a ring-shaped recess provided between the piston ring band and a piston shaft, wherein the piston shaft is connected with piston hubs suspended on the piston crown, the cover comprising a one-piece plastic or spring steel ring that is U-shaped in cross-section, said one-piece plastic or spring steel ring comprising: a) a ring bottom; b) an outer shank around a circumference of the cover, said outer shank being molded onto said ring bottom and angled off radially outwardly; c) an inner shank around the circumference of the cover, said inner shank being angled off radially inwardly, wherein said inner and outer shank permit radial deformation in such a manner that in order to close off the cooling channel when said ring is mounted in the piston, said inner and outer shanks are adapted to engage in a conical recess of the cooling channel made on an inner edge of the cooling channel, essentially without bias, causing said ring bottom to close off the cooling channel; and d) slits extending close to said ring bottom made in said inner and outer shank, said slits being non-uniformly distributed over the circumference, in order to produce a plurality of shanks having different ridge lengths (L).