Light-metal piston having heat pipes

Details Light-metal piston having heat pipes Light-metal piston having heat pipes

2005-08-10

2009-06-23

Leslie, Michael (Department: 3745)

Expansible chamber devices

Piston

With ported chamber in piston part for circulating heat...

C123S041350

Reexamination Certificate

active

07549368

ABSTRACT:
The invention relates to a lightweight piston comprising heat pipes. The aim of the invention is to simplify the structure of such a piston while at the same time allowing for an improved heat dissipation from the piston areas subject to heat load while avoiding thermal stress. For this purpose, a plurality of liquid-filled heat pipes each having an evaporator and a condenser end is used, whereby the evaporator end is configured by short pipe sections that are oriented in the thickness at bottom towards the focal point and that are interlinked by means of a composite heat pipe extending in parallel to the piston head. At least two pipe sections functioning as the condenser end are coupled with the composite heat pipe in such a manner as to configure, by way of a pipe connection arranged on the condenser ends, a closed coolant cycle between the evaporator end, composite heat pipe and condenser end of the heat pipe.

REFERENCES:
patent: 5086736 (1992-02-01), Wiemann
patent: 5454351 (1995-10-01), Cao et al.
patent: 5771776 (1998-06-01), Itoh
patent: 7281466 (2007-10-01), Wilksch et al.
patent: 762 820 (1952-11-01), None
patent: 20 00 249 (1971-09-01), None
International Search Report.

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