Beehler & Pavitt
Retaining device for a heat sink
 A retaining device has a retaining belt and a handle pivotally connected with the retaining belt and having an arcuate portion and a flat portion. When the handle pivots relative to the retaining belt and when the arcuate portion engages the heat sink, the engagement between the heat sink and the socket will be enhanced. When the flat portion engages the heat sink, the engagement between the heat sink and the socket will be loosened. 
Adda Corp.
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additional inventional additional additional
Chih-Lung Frank
Ho Shyu