Patent ID: 8035964

Claim:
A housing for a multi-position waterproof power electronic device, comprising: a one piece aluminum alloy, extruded, substantially rectangular, sleeve having four sidewalls, including a first side wall, a second side wall, a third sidewall which opposes the first sidewall, and a fourth sidewall which opposes the second sidewall; fins on at least one of the four sidewalls, said fins on an outside of the at least one of the four sidewalls to allow air to flow outside of the housing by natural convection in an extrusion direction, the fins being part of the one piece, aluminum alloy, extruded, substantially rectangular sleeve, the fins being oriented in the extruded direction; one of the sidewalls having no fins and serving as a base for fastening the housing to power electric components of the power electric device and as support for the power electronic components of the power electronic device; rows of notches in the fins, wherein the fins are machined transversely to the extrusion direction so as to form the rows of notches in the fins, the rows of notches being aligned continuously in succession along an entire length of the extrusion direction, the rows of notches having a direction that forms an angle with the extrusion direction, each row of the rows of notches extending through all the fins, and each row of the rows of notches being of geometrical shape such that each row of the rows of notches allow air to flow outside of the housing by natural convection in an optimum direction.