Heat exchange – With retainer for removable article – Electrical component
Reexamination Certificate
2002-03-22
2002-09-17
Atkinson, Christopher (Department: 3743)
Heat exchange
With retainer for removable article
Electrical component
C165S185000, C165S076000, C361S704000, C257S718000, C257S719000
Reexamination Certificate
active
06450249
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to fastening devices for use to fasten a heat sink to a CPU holder and, more particularly, to a heat sink fastening device, which can easily detachably be installed to hold down a heat sink on a holder firmly.
2. Description of the Related Art
Heat sinks are commonly used for dissipating heat from a semiconductor device, for example, a CPU.
FIG. 1
illustrates a conventional heat sink fastening device fastened to a CPU holder to hold down a heat sink. This structure of heat sink fastening device comprises two clamping plates. Each clamping plate comprises an angled clamping arm
11
and a vertical clamping arm
12
coupled to one end of the angled clamping arm
11
. The clamping arms
11
and
12
each have a respective opposite end terminating in a respective hooked portion
111
or
121
for hooking on a respective hook hole
21
in the CPU holder
2
. This structure of heat sink fastening device is still not satisfactory in function because the hooked portions
111
and
121
of the clamping arms
11
and
12
tend to be forced away from the respective hook holes
21
upon a vibration.
SUMMARY OF THE INVENTION
The present invention has been accomplished to provide a heat sink fastening device, which eliminates the aforesaid problem. According to one aspect of the present invention, the two clamping plates each having two triangular clamping arms adapted for clamping on a holder to hold down a heat sink on the holder, and two hook wires respectively mounted in respective retaining notches in the triangular clamping arms of the clamping plates to hold down the clamping plates, each hook wire having two smoothly arched supporting portions at the ends and two hooking tips respectively horizontally extended from the smoothly arched supporting portions and respectively hooked in respective through holes in the triangular clamping arms of the clamping plates. According to another aspect of the present invention, the clamping plates each have a finger strip for pressing by hand to disengage the hooked portions of the clamping arms from the respective hook holes of the holder.
REFERENCES:
patent: 5430610 (1995-07-01), Hung
patent: 5771155 (1998-06-01), Cook
patent: 6049457 (2000-04-01), Lee
patent: 6266245 (2001-07-01), Wei
patent: 6344971 (2002-02-01), Ju
patent: 6362962 (2002-03-01), Lee et al.
Atkinson Christopher
Bacon & Thomas PLLC
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