Patent ID: 7077077

Claim:
A coolable annular support for internally cooled piston rings, comprising: an annular body ( 2 ) embodied as a circular ring; a cooling channel plate ( 3 ) in the form of a circular ring and having a predominantly U-shaped cross-section, wherein said cooling channel plate is provided with openings ( 6 ), wherein end portions of legs of said cooling channel plate ( 3 ) are respectively connected to edge portions of said annular body ( 2 ) by laser beams of at least one laser in a continuous wave operation, accompanied by a supply of metal powder and an inert gas, via overlapping weld seams ( 4 ) that are staggered in a direction of said annular body ( 2 ) and are each produced with a path of movement of greater than 360°, and wherein said end portions of said legs of said cooling channel plate ( 3 ) are connected to said edge portions of said annular body ( 2 ) in such a way that said cooling channel plate, and at least a surface of said annular body that delimits an inner space thereof, delimit a hollow space ( 5 ) as a cooling channel; and respective tubular bodies ( 7 ) or plate-shaped bodies disposed on or in said openings ( 6 ) and connected, via at least one further weld seam ( 8 ), with said legs of said cooling channel plate ( 3 ) in such a way that said cooling channel and an inner space of said tubular bodies ( 7 ) form a common hollow space or a closed hollow space is present.