Metal working – Means to assemble or disassemble – Means to disassemble electrical device
Reexamination Certificate
2000-03-08
2001-10-16
Young, Lee (Department: 3729)
Metal working
Means to assemble or disassemble
Means to disassemble electrical device
C029S758000, C029S741000, C294S100000, C294S001200
Reexamination Certificate
active
06301778
ABSTRACT:
FIELD OF INVENTION
The present invention relates to a fixture for dismounting a CPU of a portable-type computer system.
BACKGROUND OF INVENTION
To save space in a portable-type computer system, in general, the CPU mounted to the motherboard is adjacent to nearby components of the motherboard. Taking the Intel's CPU for portable-type computer as an example, the back surface of the CPU provides hundreds of metal pins and a protection frame. Hundreds of metal pins provide paths for signals between the CPU and the motherboard. In addition, as shown in
FIG. 1
, the edge of the CPU
10
provides a first depression
131
and a second depression
132
. The depressions
131
,
132
provide spaces
14
for insertion of a tool which is used to dismount the CPU
10
from the mounting location of the motherboard. In general, the space
14
is in the dimension of 8 mm×4 mm.
In the past, a prior art clamp device
20
shown in
FIG. 2
has two hook ends
21
,
22
. The hook ends
21
,
22
can be respectively disposed into the spaces
14
formed by the depressions
131
and under the surface of CPU
10
. The operator then can exert force upwardly to lift up and dismount the CPU
10
. However, since it is not easy to control the direction of applied force when using the deformable clamp device
20
, the metal pins on the CPU may be damaged. It has been observed that, when the lift-up angle of the CPU
10
with respect to the motherboard exceeds
10
degrees during dismounting operation, the metal pins will experience significant deformation.
The prior art technology disclosed, on Sep. 1, 1995, in Taiwan publication no. 256415 and 256416 show a dismounting fixture having four grasp fingers. However, the dismounting fixture disclosed only applies to CPUs of 80486 type and not to CPUs of Pentium type or above. In addition, one can not accurately control the external force applied using this prior art technology.
SUMMARY OF INVENTION
The main objective of the invention is to provide a fixture which dismounts the CPU of a portable-type computer without damaging either the CPU or other adjacent components on the motherboard.
The fixture for dismounting a CPU from a portable-type computer system having a motherboard with a CPU-mounting location is provided. The fixture includes a first device capable of displacing, a second device and a third device. The second device receives the first device and limits the displacement of the first device. The third device is responsive to an external force and forces the first device to make displacement such that CPU is dismounted from the motherboard,
REFERENCES:
patent: 2853772 (1958-09-01), Yuter
patent: 3443297 (1969-05-01), Lusby, Jr.
patent: 3909899 (1975-10-01), Witt
patent: 4389770 (1983-06-01), Bocinski et al.
patent: 4521959 (1985-06-01), Sprenkle
patent: 4970779 (1990-11-01), Chen
patent: 5875544 (1999-03-01), Chou
patent: 84204504 (1995-04-01), None
patent: 84204506 (1995-04-01), None
Fang Tsung-Hsing
Ou Teh-Chuan
Yo Yu-Shi
Asustek Computer Inc.
Rabin & Berdo P.C.
Trinh Minh
Young Lee
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