Fluid sprinkling – spraying – and diffusing – Including supplemental gas shaping or shielding jet
Reexamination Certificate
2002-12-04
2004-08-24
Nguyen, Dinh Q. (Department: 3752)
Fluid sprinkling, spraying, and diffusing
Including supplemental gas shaping or shielding jet
C239S414000, C239S417300, C239S329000, C239S353000, C239S345000, C137S626000, C251S285000
Reexamination Certificate
active
06779742
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an improvement of the blowing-out characteristics of an air brush, and more particularly, relates to an air brush able to blow-out paint ejected from a nozzle from a starting point to the line of a predetermined width at the beginning of writing of the line so as to be naturally transferred, and able to easily perform a basic operation of the air brush for completely writing the line even by a beginner while the line is naturally tapered from the line of a predetermined width.
2. Description of the Related Art
FIGS. 11 and 12
show a conventional air brush
100
. This air brush
100
has an air brush main body
101
having a nozzle
102
at its tip and approximately formed in a long sleeve shape.
A needle
103
is inserted along a shaft core portion within the air brush main body
101
so as to be freely advanced and retreated. The air brush
100
is constructed such that a compressed air is supplied to an air supply port
104
connected to an intermediate portion of the air brush main body
101
, and is introduced to an air passage path
112
within the air brush main body
101
through an air valve
105
, and is blow out of the above nozzle
102
. The above air valve
105
has a structure in which the air valve
105
is opened by pushing a valve rod
105
a.
In the air brush
100
, an operating rod
106
is fitted and mounted to a notch port
121
notched and formed in the intermediate portion on the upper face of the air brush main body
101
. A pushing rod
108
is connected to a lower end portion of this operating rod
106
through a pivotal shaft
107
so as to be freely bent. The pushing rod
108
is supported such that the pushing rod
108
is inserted and fitted into an insertion hole
109
bored within the air brush main body
101
so that the pushing rod
108
is slid in the axial direction together with the operating rod
106
. A tip portion of the above pushing rod
108
abuts on the tip of the valve rod
105
a
of the air valve
105
. An operating button
106
a
for placing a finger is arranged at the upper end of the above operating rod
106
.
On the other hand, the valve rod
105
a
is mounted into a connecting sleeve
110
as an air supply port, and is upward biased at any time by the biasing force of a coil spring
111
, thereby maintaining a state (valve closing state) in which an upper end portion of the above valve rod
105
a
abuts on the tip of the pushing rod
108
(FIGS.
11
and
12
).
When a user pushes down the operating rod
106
of the above air brush
100
, the valve rod
105
a
is pushed down through the pushing rod
108
so that the air valve
105
is opened. Thus, the compressed air is supplied into the air brush main body
101
from a supply source of the compressed air connected to the above connecting sleeve
110
, and is ejected from the nozzle
102
through the air passage path
112
.
When the user pulls the operating rod
106
pushed down as mentioned above backward as it is and is tilted with the pivotal shaft
107
as a fulcrum, the needle
103
gripped and supported by a needle chuck
113
is retreated, and the paint supplied from a container
112
for paint is sprayed and ejected by the ejection of the compressed air. The operation for pushing and then pulling the operating rod
106
as mentioned above is called a double action, and this double action is a basic operation in the use of the air brush.
When a thin line is drawn by using the above conventional airbrush
100
, the air is blown out of the nozzle
102
by slightly pushing-down the operating rod
106
. Next, a small amount of paint is supplied to the nozzle
102
by slightly pulling the operating rod
106
while this operating rod
106
is pushed. Thus, a line gradually widened in width from a starting point is written. Namely, as mentioned above, the double action as the basic operation of the air brush is taken. The blowing-out of the paint is increased by further pulling the operating rod from the above state so that a thick line can be drawn.
Thus, when the line is drawn by using the air brush
100
, a write-beginning portion of the line is gradually thickened from the starting point and a constant thick line is formed by slightly pulling the operating rod
106
while the operating rod
106
is very slightly pushed. However, the operation of pulling the operating rod
106
little by little while the operating rod
106
is pushed little by little, is an operation requiring concentration force even in a veteran.
Accordingly, it is difficult for a person never using the air brush or a beginner to smoothly perform the above operation of the operating rod. Since no adjustment of pushing and pulling degrees of the operating rod is first known, the paint is brown out at once at the write-beginning inmost cases, thereby resulting in a failure.
The operation of the operating rod of the air brush is gradually progressed by repeating practice. However, when the beginner first fails in this operation, it seems very difficult to use the air brush. As a result, there is also a case in which weak consciousness is caused in the use of the air brush, and the use (the drawing of a work by using the air brush) of the air brush itself is abandoned.
On the other hand, when the operating rod is operated as mentioned above, the paint begins to be ejected after the air is first blown out. When this operation is reversely performed, the paint is blown off by the air after the paint is collected in the nozzle. Therefore, the paint is ejected at a stroke at the starting point of the line, thereby resulting in a failure.
After the line is written, the blowing-out of the air is stopped after the ejection of the paint is stopped. When this operation is reversely performed, the paint is left in the nozzle after the blowing-out of the air is stopped. Therefore, in the next blowing-out, the paint left in the nozzle is brown out at a stroke.
In contrast to the above conventional airbrush, an object of the present invention is to provide an air brush having a function in which even a beginner can easily perform an operation for pulling the operating rod (ejecting the paint) little by little while the operating rod is slightly pulled (the air is ejected) at an initial stage of the drawing of a line requiring a technique and an experience.
SUMMARY OF THE INVENTION
To solve the above problems, in the air brush of the present invention, a needle is inserted in the axial direction along a shaft core portion of an air brush main body having a nozzle at its tip so as to be advanced and retreated. The amount of paint ejected from the nozzle is adjusted by advancing and retreating this needle.
An air valve is arranged within the air brush main body, and a compressed air supplied through this valve is blown out of the above nozzle. An operating rod is fitted into a notch port formed in the air brush main body, and a pushing rod is connected through a pivotal portion arranged at the lower end of this operating rod so as to be freely bent. This pushing rod is fitted into the air brush main body, and is supported together with the above operating rod so as to be freely vertically pushed and moved.
Since the lower end of the above pushing rod and the upper end of a valve rod for opening and closing the air valve are opposed to each other, the air valve is opened by pushing and moving the valve rod by pushing the operating rod so that the compressed air is supplied to the nozzle. The amount of the air supplied to the nozzle, i.e., the blowing-out amount is approximately proportional to the pushing amount of the above operating rod.
On the other hand, when the above operating rod is tilted backward, the needle is retreated in cooperation with an engaging body mounted within the notch port of the air brush main body. The nozzle is opened by retreating the needle, and the paint supplied by blowing-out the air is sprayed.
A slanting face projected while the slanting face is inclined from below to above, is formed on the front face side of the
B.B. Rich Co., Ltd.
Bacon & Thomas PLLC
Nguyen Dinh Q.
LandOfFree
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