Patent ID: 6820582
Filing Date: 2004-11-23
Classification: F02F

Abstract:
A cooling channel cover for a one-piece piston of an internal combustion engine, the piston having a closed cooling channel that runs around inside a piston crown, at a level of a piston ring band, and a ring-shaped recess provided between the piston ring band and a piston shaft, the piston shaft being connected with the piston crown via hubs suspended on the piston crown, the cover comprising a one-piece plastic/spring steel ring having the following characteristics:a U-shaped cross-section; a ring bottom; an outer shank around a circumference of the ring, molded onto the ring bottom and angled off radially to the outside; an inner shank around the circumference of the ring, angled off radially to the inside; a first radial division on the ring, said division having a mouth width; a second radial division on the circumference of the ring, opposite the first division, wherein said second radial division does not separate the outer shank, said second radial division forming a first film hinge for radial deflection of one of the shanks, in its positional plane; and a second film hinge that permits at least one radial deflection of at least one of the shanks, in such a manner that in order to close off the cooling channel, the shanks are adapted to engage in a stepped conical recess on an inner circumferential edge of the cooling channel.