Dispensing – Gas or vapor dispensing
Reexamination Certificate
2001-02-05
2002-04-09
Jacyna, J. Casimer (Department: 3751)
Dispensing
Gas or vapor dispensing
C251S214000
Reexamination Certificate
active
06367657
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a control valve for a gas cylinder, and more particularly to a structure for fixing a washer for preventing the deviation of the structure engaged with the inner side of a injection molded pipe holder.
2. Description of the Prior Art
A conventional control valve for a gas cylinder will be explained with reference to Korean Patent Application No. 1997-5892.
As shown in
FIGS. 1 and 2
, a passage
11
is formed on the outer peripheral surface of a pipe holder
10
. A space for engaging the structure and a pin hole
12
is formed in the central portion of the pipe holder. The pipe holder
10
is injection molded such that a liner recess
13
having a periphery corresponding to the outer diameter of the structure is formed at the lower portion thereof. An inner holder
20
is engaged with the inner side central portion of the pipe holder
10
and has a shape for forming a passage communicated with the passage
11
of the pipe holder
10
. O-rings
30
are engaged with the upper and lower sides of the inner holder
20
when the pipe holder
10
is engaged with the inner holder
20
. A washer
40
prevent the deviation of the structure engaged with the pipe holder
10
at the lower portion of the O-rings
30
constituted at the lower side of the inner holder
20
. A protruding portion
13
a
is formed along the inner peripheral surface of the liner recess
13
formed at the lower portion of the pipe holder
10
to fix the washer to the pipe holder
10
. The protruding portion
13
a
is melt by the inducing heating of the high frequency energy to fix the protruding portion
13
a
to the lower side of the washer
40
.
An opening/closing pin
50
is engaged with the lower side of the pipe holder
10
and is penetrated through the pin hole
12
. The opening/closing pin
50
is moved upward and downward in the pipe holder
10
.
The structure is engaged with the inner side of the injection molded pipe holder
10
, and the protruding portion
13
a
is formed at the lower portion of the pipe holder
10
, i.e., on the liner recess
13
on which the lower surface of the washer
40
is located to fix the washer
40
. The protruding portion
13
a
is melt by the inducing heating of the high frequency energy to prevent the deviation of the washer
40
from the pipe holder
10
.
The pipe holder
10
has an inlet and an interior space having a diameter corresponding to the size of the structure to be engaged. Only the upper portion of the valve pin
50
can be penetrated through the pin hole(
12
).
A passage
11
is formed at the central portion of the pipe holder
10
, and a liner recess
13
is formed on the lower surface.
The structure which is engaged with the pipe holder
10
comprises the inner holder
20
, the O-rings
30
, and a washer.
The passage
11
is communicated with the engaged inner holder
20
, and the liner recess
13
has an inner diameter corresponding to the outer diameter of the washer
40
.
The inner diameter of the liner recess
13
refers to an inner side hill portion for forming the liner recess
13
, and the hill portion is extended to form the protruding portion
13
a.
The protruding portion
13
a
is melt by the inducing heating of the high frequency energy and hereinafter the engaging order of the structure to the pipe holder
10
will be explained.
The inner holder
20
is engaged from the lower portion of the pipe holder
10
, and the O-rings
30
are engaged with the upper side and the lower side of the inner holder
20
.
Then, according to the shape of the inner holder
20
, the passage having the inner surface of the pipe holder
10
and the space, and the formed passage is communicated with the passage formed in the pipe holder
10
.
Then, the washer
40
is engaged with the lower portion of the O-ring
30
engaged with the lower portion of the inner holder
20
.
The inner diameter of the pipe holder
10
has a multi-step and has a space for engaging the O-ring
30
and a space for engaging the washer
40
. The upper side portion of the washer
40
is adhered to the inner surface of the pipe holder
10
and the lower surface of the washer
40
is identical with the liner recess
13
of the pipe holder
10
.
The protruding portion extended from the liner recess
13
is melt by the inducing heating of the high frequency energy and the melt portion is adhered to the lower surface of the washer
40
.
Namely, when the protruding portion
13
a
is melt, the inner diameter of the inlet of the pipe holder
10
engaged with the washer
40
is reduced and the melt protruding portion
13
a
is adhered to the lower surface of the washer
40
, and thus the washer
40
is prevented from being deviated from the pipe holder
10
.
Therefore, the structure engaged with inner side of the pipe holder is not flowed and firmly engaged.
After the engaging process is completed, a valve pin
50
is engaged with the lower portion of the washer
40
to be penetrated through the pin hole
12
.
However, in the conventional control valve for a gas cylinder in which a structure is engaged with the integrally formed pipe holder
10
and the protruding portion
13
a
is melt to fix the protruding portion
13
, the protruding portion is extended to the liner recess
13
and is formed so as to have a circular shape, and the protruding portion
13
a
is pushed upward when the protruding portion
13
a
is melt and thus the protruding portion
13
a
is not adhered to the surface of the washer
40
uniformly and the bonding surface is not smooth.
SUMMARY OF THE INVENTION
The present invention has been made to solve the above-mentioned problem, and accordingly it is an object of the present invention to provide a structure for fixing a washer for preventing the deviation of the structure engaged with the inner side of a injection molded pipe holder.
In order to achieve the above-mentioned object of the present invention, the present invention provides a control valve for a gas cylinder comprising: a pipe holder having a passage on the outer peripheral surface thereof and injection molded such that a space for engaging a structure and a liner recess having a periphery corresponding to the outer diameter of the structure are formed at the lower portion thereof, and a washer for preventing the deviation and the flowing of the structure with which the pipe is engaged, wherein a plurality of embossed bosses are pressed to the lower portion of the washer by pressing the bosses along the periphery of the extending surface of the engaging inlet of the structure of the pipe holder from a liner recess formed at the lower portion of the pipe holder by using an exterior pressing device to fixing the washer to the pipe holder.
REFERENCES:
patent: 3825221 (1974-07-01), Smith, Jr.
patent: 4336919 (1982-06-01), Hall
patent: 4340204 (1982-07-01), Herd
patent: 5178363 (1993-01-01), Icenhower et al.
patent: 5755269 (1998-05-01), Venooker et al.
patent: 6073972 (2000-06-01), Rivera
McGuireWoods LLP
Samhongsa Co. Ltd.
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