US Patent 7694720 Sectional modular heat sink

A sectional modular heat sink is formed from a plurality of stacked modular heat radiating units, each of which is provided on one side along each longitudinal edge with an upright ridge portion having two inclined sidewalls, at least one of which being provided with a groove; and on an opposite side with a channel corresponding to the ridge portion to have two inclined sidewalls, at least one of which being provided with a flange corresponding to the groove on the ridge portion. A plurality of the modular heat radiating units may be sequentially stacked and connected through engagement of the ridge portions and the grooves on a first modular heat radiating unit with the channels and the flanges on a second modular heat radiating unit, respectively, and thereby form a sectional modular heat sink.