Heat exchange – With retainer for removable article – Electrical component
Reexamination Certificate
2001-10-19
2002-09-24
Flanigan, Allen (Department: 3743)
Heat exchange
With retainer for removable article
Electrical component
C361S697000, C361S704000, C257S722000
Reexamination Certificate
active
06453987
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a heat-dissipating fin unit, more particularly to a unitary heat-dissipating fin strip unit with a relatively high heat-dissipating efficiency.
2. Description of the Related Art
FIG. 1
illustrates a conventional heat dissipating device
6
that includes a base plate
61
having a bottom surface that contacts and that is in thermal communication with a heat-generating source (not shown), a plurality of fin posts
62
, each adjacent pair of which are spaced apart from each other and are provided on the base plate
61
, and a heat-dissipating fan
63
provided on the fin posts
62
for blowing air toward or drawing air from the fin posts
62
.
FIG. 2
illustrates another conventional heat dissipating device
7
that includes a base plate
71
, a plurality of fin plates
72
provided on the base plate
71
, and a fan
73
provided on the fin plates
72
. Each of the fin plates
72
is formed with a plurality of holes
721
for increasing flow paths of air among the fin plates
72
.
As shown in
FIGS. 1 and 3
, due to the factors of material, size and thickness of the fin posts
62
of the conventional heat dissipating device
6
, a large amount of heat (indicated by dotted areas in
FIG. 3
) accumulates easily in the interior of each fin post
62
, and due to insufficient surface area for dissipating heat, the heat-dissipating effect is limited. As shown in
FIGS. 2 and 4
, since the fin plates
72
of the conventional heat dissipating device
7
are in plate form, heat is dissipated primarily from the upper portion of each fin plate
72
, which is nearer to the fan
73
, such that a large amount of heat accumulates easily in the lower portion of each fin plate
72
. Furthermore, the fin posts
62
(see
FIG. 1
) and fin plates
72
used in the abovementioned heat dissipating devices
6
,
7
(see
FIGS. 1 and 3
) are rigid and cannot be deformed for fitting heat-generating sources with various shapes and sizes.
SUMMARY OF THE INVENTION
Therefore, the object of the present invention is to provide a unitary heat-dissipating fin strip unit with a relatively high heat-dissipating efficiency.
According to one aspect of the present invention, a heat dissipating device comprises:
a base plate adapted to contact and to be in thermal communication with a heat-generating source; and
a unitary heat-dissipating fin strip unit mounted fixedly on and in thermal communication with the base plate, the fin strip unit including
a row of straight strip portions arranged along a first direction, each adjacent pair of the straight strip portions being spaced apart from each other so as to define a heat-dissipating space therebetween, and
a plurality of bridging units disposed respectively within the heat-dissipating spaces, each of the bridging units including a plurality of pressed and staggered first and second U-shaped strip portions, each of which has two ends that are connected respectively to corresponding ones of the straight strip portions, the first U-shaped strip portions of each of the bridging units being disposed on one side of the corresponding ones of the straight strip portions and being arranged in a row along a second direction, which is transverse to the first direction relative to the straight strip portions, the second U-shaped strip portions of each of the bridging units being disposed on the opposite side of the corresponding ones of the straight strip portions and being arranged in a row along the second direction.
According to another aspect of the present invention, a unitary heat-dissipating fin strip unit is adapted for use in a heat dissipating device that includes a base plate. The fin strip unit comprises:
a series of straight strip portions arranged along a first direction, each adjacent pair of the straight strip portions being spaced apart from each other so as to define a heat-dissipating space therebetween; and
a plurality of bridging units disposed respectively within the heat-dissipating spaces, each of the bridging units including a plurality of pressed and staggered first and second U-shaped strip portions, each of which has two ends that are connected respectively to corresponding ones of the straight strip portions, the first U-shaped strip portions of each of the bridging units being disposed on one side of the corresponding ones of the straight strip portions and being arranged in a row along a second direction, which is transverse to the first direction relative to the straight strip portions, the second U-shaped strip portions of each of the bridging units being disposed on the opposite side of the corresponding ones of the straight strip portions and being arranged in a row along the second direction, assembly of the straight strip portions and the first and second U-shaped strip portions being adapted to be disposed fixedly on and to be in thermal communication with the base plate.
According to still another aspect of the present invention, a unitary heat-dissipating fin strip unit is adapted to be disposed around and to be in thermal communication with a heat-generating source. The fin strip unit comprises:
a series of straight strip portions adapted to be arranged along a circumferential direction relative to the heat-generating source, each adjacent pair of the straight strip portions being spaced apart from each other so as to define a heat-dissipating space therebetween; and
a plurality of bridging units disposed respectively within the heat-dissipating spaces, each of the bridging units including a plurality of pressed and staggered first and second U-shaped strip portions, each of which has two ends that are connected respectively to corresponding ones of the straight strip portions, the first U-shaped strip portions of each of the bridging units being disposed on one side of the corresponding ones of the straight strip portions and being arranged in series along a longitudinal direction relative to the straight strip portions, the second U-shaped strip portions of each of the bridging units being disposed on the opposite side of the corresponding ones of the straight strip portions and being arranged in a series along the longitudinal direction relative to the straight strip portions.
REFERENCES:
patent: 3695347 (1972-10-01), Chartet
patent: 5311928 (1994-05-01), Marton
patent: 5375655 (1994-12-01), Lee
patent: 6034467 (2000-03-01), Roberts
patent: 6135200 (2000-10-01), Okochi et al.
Brooks & Kushman P.C.
Flanigan Allen
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