Material or article handling – Elevator or hoist and loading or unloading means therefor – Grab
Reexamination Certificate
2000-06-05
2001-09-11
Bratlie, Steven A. (Department: 3652)
Material or article handling
Elevator or hoist and loading or unloading means therefor
Grab
C294S064200
Reexamination Certificate
active
06287071
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a pick-up apparatus, more particularly to an apparatus for picking-up an integrated circuit component.
2. Description of the Related Art
FIGS. 1 and 2
illustrate a conventional apparatus
1
for picking-up an integrated circuit component
2
. The conventional apparatus
1
includes a retaining block
14
, an air pipe
13
, a coupling base
11
and a compression spring
12
. The retaining block
14
has upper and lower sides, and is formed with a first pipe hole
141
that extends through the upper and lower sides, and a receiving recess
142
that is formed in the upper side and that is larger than and registered with the first pipe hole
141
. The air pipe
13
has an upper pipe section with a distal upper end, and a lower pipe section with a distal lower end. An O-shaped sealing ring
132
is sleeved around the upper pipe portion. The air pipe
13
is formed with a radially and outwardly extending rim flange
133
at a junction of the upper and lower pipe sections. The air pipe
13
further has a rubber suction cup
131
mounted on the distal lower end of the lower pipe section. The lower pipe section extends through the first pipe hole
141
such that the rim flange
133
abuts against the retaining block
14
in the receiving recess
142
, such that the suction cup
131
projects downwardly relative to the lower side of the retaining block
14
, and such that the distal upper end of the upper pipe section extends outwardly of the receiving recess
142
and projects upwardly relative to the upper side of the retaining block
14
. The coupling base
11
is mounted on and is disposed on top of the retaining block
14
. The coupling base
11
includes a horizontal base wall
110
with top and bottom sides. The base wall
110
is formed with a second pipe hole
111
that extends through the top and bottom sides and that is registered with the first pipe hole
141
, and a spring receiving recess
113
that is formed in the bottom side and that is larger than and registered with the second pipe hole
111
. The coupling base
11
further includes a guide tube
114
with an upper tube portion that is disposed in the spring receiving recess
113
and that is connected to the bottom side of the base wall
110
at a periphery of the second pipe hole
111
, and a lower tube portion that extends into the receiving recess
142
and toward the rim flange
133
. The lower tube portion of the guide tube
114
abuts against the rim flange
133
on the air pipe
13
. The upper pipe section extends through the guide tube
114
and the second pipe hole
111
, such that the distal upper end thereof projects upwardly relative to the top side of the base wall
110
, and such that the sealing ring
132
establishes an air seal between the upper pipe section and an inner peripheral surface of the guide tube
114
. The coupling base
11
is formed with a downwardly projecting peripheral rim
115
that surrounds the retaining block
14
. The compression spring
12
is sleeved around the guide tube
114
, and has an upper spring portion that is disposed in the spring receiving recess
113
and that abuts against the base wall
110
, and a lower spring portion that is disposed in the receiving recess
142
and that abuts against the rim flange
133
. A plurality of fasteners
16
extend through the retaining block
14
, and engage threadedly the coupling base
11
for mounting the coupling base
11
on the retaining block
14
. The conventional apparatus
1
further includes a protective sleeve
15
having an upper section that is mounted on the peripheral rim
115
of the coupling base
11
, and a lower section that projects downwardly relative to the lower side of the retaining block
14
. The upper section of the protective sleeve
15
is formed with a radial outward mounting flange
151
. A plurality of fasteners
17
extend through the mounting flange
151
and engage threadedly the peripheral rim
115
of the coupling base
11
for mounting the protective sleeve
15
on the coupling base
11
.
When the distal upper end of the upper pipe section is connected to the air pump
20
, and the suction cup
131
is lowered toward the integrated circuit component
2
, a suction force in a direction of the arrow (A) can be generated for holding the integrated circuit component
2
onto the suction cup
131
. However, the contact between the sealing ring
132
and the inner peripheral surface of the guide tube
114
is not enough to ensure an effective airtight seal therebetween.
SUMMARY OF THE INVENTION
Therefore, the object of the present invention is to provide an apparatus for picking-up an integrated circuit component that can achieve an improved air sealing effect.
According to the present invention, an apparatus is adapted for picking-up an integrated circuit component, and is adapted to be connected to an air pump. The apparatus includes a retaining block, a washer, an air pipe, a coupling base and a compression spring.
The retaining block has upper and lower sides, and is formed with a first pipe hole that extends through the upper and lower sides, and a washer receiving recess that is formed in the upper side and that is larger than and registered with the first pipe hole.
The washer is disposed in the washer receiving recess, and is formed with a second pipe hole that is registered with the first pipe hole.
The air pipe has an upper pipe section with a distal upper end, and a lower pipe section with a distal lower end. The air pipe is formed with a radially and outwardly extending rim flange at a junction of the upper and lower pipe sections. The lower pipe section extends sealingly through the second pipe hole and further through the first pipe hole such that the rim flange rests on top of the washer in the washer receiving recess, such that the distal lower end of the lower pipe section projects downwardly relative to the lower side of the retaining block, and such that the distal upper end of the upper pipe section extends outwardly of the washer receiving recess and projects upwardly relative to the upper side of the retaining block.
The coupling base is mounted on and is disposed on top of the retaining block. The coupling base includes a horizontal base wall with top and bottom sides. The base wall is formed with a third pipe hole that extends through the top and bottom sides and that is registered with the first and second pipe holes, and a spring receiving recess that is formed in the bottom side and that is larger than and registered with the third pipe hole. The coupling base further includes a guide tube with an upper tube portion that is disposed in the spring receiving recess and that is connected to the bottom side of the base wall at a periphery of the third pipe hole, and a lower tube portion that extends into the washer receiving recess and toward the rim flange. The upper pipe section extends through the guide tube and the third pipe hole such that the distal upper end thereof projects upwardly relative to the top side of the base wall.
The compression spring is sleeved around the guide tube and has an upper spring portion that is disposed in the spring receiving recess and that abuts against the base wall, and a lower spring portion that is disposed in the washer receiving recess and that abuts against the rim flange.
Thus, when the distal upper end of the upper pipe section is connected to the air pump, and the distal lower end of the lower pipe section is lowered toward the integrated circuit component, a suction force can be generated for holding the integrated circuit component onto the lower pipe section of the air pipe.
REFERENCES:
patent: 2607620 (1952-08-01), Oliveri
patent: 4657470 (1987-04-01), Clark et al.
patent: 4950011 (1990-08-01), Borcea et al.
patent: 5059088 (1991-10-01), Klein
Hsieh Lai-Fue
Hsieh Yi-Chang
Huang Ching-Jung
Liao Mu-Sheng
Bratlie Steven A.
Harness & Dickey & Pierce P.L.C.
Silicon Integrated Systems Corp.
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