Patent ID: 7422052

Claim:
A thermosiphon cooling assembly for dissipating heat generated by an electronic device comprising; a housing having a housing top and a housing bottom and opposing sides extending therebetween to define a low profile entrance and a low profile exit, a boiling chamber including a section for overlaying the electronic device, a refrigerant disposed within said boiling chamber for being heated by the electronic device and for transforming into vapor, a condenser tube having a bottom end and a top end and extending from said boiling chamber for condensing the vapor, said condenser tube extending at a diagonally upward angle across said sides between said housing bottom and said housing top for defining a wedge shaped exit air plenum on one side of said condenser tube and a wedge shaped entrance air plenum on the other side of said condenser tube; a plurality of said condenser tubes extending at a diagonally upward angle from said housing bottom adjacent to said boiling chambers to said housing top adjacent to said exit; and a plurality of condenser fins extending between said condenser tubes to define airflow passages extending transversely to said condenser tubes; wherein said plurality of condenser fins are spaced non-uniformly apart and disposed from each other at a distance that decreases as said plurality of condenser fins traverse from said housing bottom to said housing top.