Heat sink

Details Heat sink Heat sink

2002-10-16

2003-11-04

McKinnon, Terrell (Department: 3743)

Heat exchange

Heat transmitter

C165S182000, C165S080300, C361S704000, C361S697000, C257S722000

Reexamination Certificate

active

06640888

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a heat sink and, more particularly, to a heat sink in which a plurality of fins can be easily and securely connected to a heat-conductive rod.
2. Description of Related Art
Heat sinks are widely used for CPU (Central Processing Units).
FIG. 1
shows a heat sink including a plurality of adjoined fins
90
made of a thermally conductive material. Each of the fins
90
is provided with a pair of angled edges
93
for engagement with the next fin
90
and with a through-hole
91
surrounded by an annular wall
92
for insertion of a heat-conductive rod
94
therein. The heat-conductive rod
94
has an end designed to be adhered to a heat source, for example, a CPU, so as to transmit heat produced by the heat source to the heat sink, where the heat can easily be dissipated.
In this conventional heat sink, the fins
90
are connected to the rod
94
by tightly fitting the same rod
94
in the through-holes
91
of all fins
90
. The rod
94
must have a diameter slightly larger than that of the through-holes
91
. If the diameter is much larger than necessary, the rod
94
is difficult to be inserted into the through-holes
91
. On the other hand, if the diameter is less larger than necessary, neither the fins
90
can be securely connected to the rod
94
nor the annular walls
92
can be brought into a desired thermal contact with the rod
94
.
FIG. 2
shows another heat sink that includes a plurality of spaced fins
8
, each having a through-hole
81
surrounded by an annular wall
82
for insertion of a heat-conductive rod
86
therein. Each annular wall
82
here is additionally provided with a tapered portion
84
at a proximal end thereof and with an axial slot
83
which extends from a distal end of the annular wall
82
to the related fin
8
, where the slot
83
forms an aperture
85
in which a bar
87
is inserted.
Although the axial slots
83
provides the annular walls
82
with a radial expansibility, which facilitates the insertion of both the rod
86
and the bar
87
, it is much possible that the annular walls
82
may be expanded permanently and thus the fins
8
can not be securely connected to the rod
86
.
OBJECTS OF THE INVENTION
The object of the present invention is to provide a heat sink in which a plurality of fins can be easily connected to a heat-conductive rod.
Another object of the present invention is to provide a heat sink in which the plurality of fins can be securely connected to the heat-conductive rod.
SUMMARY OF THE INVENTION
The present invention provides a heat sink comprising a plurality of spaced fins made of a thermally conductive material. Each of the fins has at least one through-hole surrounded by an annular wall. The annular wall is additionally provided with at least one axial slot which has a front end at a certain distance from the distal end of the annular wall and which extends to the related fin to form an aperture therein. A heat-conductive rod is inserted in the through-holes of the fins and fitted in the annular walls. Moreover, a bar is inserted in the apertures in the fins. The bar is made low melting material so as to join the fins to the heat-conductive rod after being melt and then hardened becoming hard again.
Other objects, advantages and novel features of this invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.


REFERENCES:
patent: 2216778 (1940-10-01), Houdry
patent: 2585912 (1952-02-01), Buschow et al.
patent: 3189087 (1965-06-01), Parris
patent: 3780797 (1973-12-01), Gebelius
patent: 4928756 (1990-05-01), Shull et al.
patent: 5509465 (1996-04-01), Lai
patent: 6006827 (1999-12-01), Lu
patent: 6382307 (2002-05-01), Wang et al.
patent: 6435266 (2002-08-01), Wu
patent: 6550529 (2003-04-01), Horng et al.

Affiliated with

Also associated with

Rating

Heat sink does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Heat sink, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heat sink will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3120896