Coolable annular support for intentionally cooled piston...

Internal-combustion engines – Cooling – Internal cooling of moving parts; e.g. – hollow valves,...

Reexamination Certificate

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Reexamination Certificate

active

07077077

ABSTRACT:
The invention relates to a coolable annular support (1) for internally cooled piston rings, comprising an annular body (2) embodied as a circular ring and a cooling channel plate (3), the cooling channel plate (3) being a component of the cooling channel, and a method for the production thereof. The components forming the annular body (2) and the cooling channel plate (3) are connected together by means of laser beams from at least one laser in a continuous wave operation. The cooling channel plate (3) is U-shaped and has openings (6) which act as an inlet or an outlet for the cooling material in conjunction with tubular-shaped bodies. It is possible to simultaneously compensate variations in volume by different air temperatures during welding. At least one edge of the annular body (2) and the cooling channel plate form a cavity (5) for the cooling material by connecting the end areas of the limbs of the cooling channel plate to said edge of the annular body (2). The connections of the annular body (2) and the cooling channel plate (3) takes place by means of one or more overlapping weld seams (4), so that a sealing connection between said two components is guaranteed.

REFERENCES:
patent: 4120081 (1978-10-01), Rosch et al.
patent: 4368697 (1983-01-01), Moebus
patent: 4587932 (1986-05-01), Moebus
patent: 5947065 (1999-09-01), Bing et al.
patent: 198 38 529 (1999-11-01), None
patent: 19838529 (1999-11-01), None
patent: 199 40 440 (2001-05-01), None
patent: 01041648 (1987-10-01), None
patent: 0916832 (1999-05-01), None

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