"Heat pipes are made flexible by inserting a flexible bellows section between the evaporator heat input section and the condenser heat output section. Flexible heat pipes are made from a wide range of metal materials and use a variety of working fluids depending on the application.

Flexible heat pipes can be installed in either gravity-aiding or against-gravity orientations. The against-gravity orientation is possible because of Thermacore’s proprietary flexible wick structures used to return the working fluid to the evaporator section. The cold plate portion attaches to the surface to be cooled and the other end attaches to the heat sink. The flexible section allows for ease of installation, and it accommodates any relative motion between the heat source and the heat sink. The condenser region can be cooled by air cooled fins, like many Thermacore products."