Fluid sprinkling – spraying – and diffusing – Including supply holder for material – Fluid pressure discharge means
Reexamination Certificate
2001-12-04
2004-02-17
Ganey, Steven J. (Department: 3752)
Fluid sprinkling, spraying, and diffusing
Including supply holder for material
Fluid pressure discharge means
C239S319000, C239S353000, C239S419000
Reexamination Certificate
active
06691931
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an air brush and more particularly to an air brush having an adjusting function in which the discharge of coating material is adapted to be kept constant by restricting the pulling position of an operating lever.
2. Description of the Related Art
Among conventional air brushes, there is an air brush as shown in FIG.
5
. This air brush
100
includes an air brush body
101
having a nozzle
102
provided at a tip end thereof for spraying coating material, and a needle
103
inserted into an axial core section of the air brush body
101
so as to slidably advance and retract along the axial core section of the air brush body
101
. At a middle part of the air brush body
101
, an operating lever
104
is provided. By depressing the operating lever
104
, an air valve
105
is opened. When the air valve
105
is opened, compressed air which is supplied from an air supplying port
112
connected to a lower portion of the air brush body
101
is adapted to be introduced into an air passageway
106
in the air brush body
101
and blew off from the air nozzle
102
.
Also, in the air brush
100
, when the operating lever
104
is depressed as described above, the blowing-off of the compressed air from the nozzle
102
starts and, when the operating lever
104
is pulled rearward of the air brush body
101
from the situation, a needle chuck
107
is retreated through an operating plate
109
which is bent into a substantially S-shape.
By the retreating of the needle chuck
107
, a tip end of the needle
103
chucked by the needle chuck
107
is retreated, thereby opening the nozzle
102
. Upon the opening of the nozzle
102
, liquid coating material which is sucked up from a container
108
with the foregoing blowing-off of the compressed air is blew off in a finely atomized state from the opened nozzle
102
. That is, the depressing of the operating lever
104
causes the blowing-off of the compressed air to start and the rearward pulling of the operating lever
104
causes the coating material to be blew off. Also, according to the pulling amount of the operating lever
104
, the amount of the coating material discharging from the nozzle is controlled so as to increase or decrease.
The above-mentioned air brush
100
has an adjusting screw
110
threadedly mounted on a rear end of the needle chuck
107
for fastening and releasing a chucking portion of the needle chuck. The above-mentioned adjusting screw
110
serves as means to adjust a chucking position at which the needle
103
is chucked by the needle chuck
107
. For example, the adjusting screw
110
is loosened and the needle
103
is slid rearwardly in a predetermined amount and, thereafter, the adjusting screw
110
is again tightened, whereby the nozzle
102
can be always kept opened in a predetermined amount in state where the operating lever
104
remains unpulled.
Therefore, in the state as described above, when the operating lever
104
is depressed (is not pulled rearwardly), it is possible to always blow off a certain amount of coating material.
However, when the blowing-off amount of the coating material is to be kept constant as described above, it is necessary to perform the following operation. That is, after a cap member
111
which is threadedly mounted in the rear end of the air brush body
101
is removed from the air brush body
101
and the needle
103
is adjusted, the cap member
111
is again mounted in the air brush body
101
. Thus, the operation is troublesome.
On the other hand, among conventional air brushes, an air brush with an adjusting mechanism has been developed in the background of the above problem (FIG.
4
).
In the air brush
200
, a hollow cap member
211
is threadedly connected to a rear end portion of an air brush body
201
and an adjusting finger-grip
212
for adjusting coating material is threadedly mounted in a rear end portion of the hollow cap member
211
. The adjusting finger-grip
212
comprises a gripping portion
211
a
projecting outwardly from a rear end opening of the cap member
211
, a threaded portion
211
b
threadedly mounted in the cap member
211
through the rear end opening of the cap member
211
, and a pipe-like abutting portion
212
c
which is formed integrally with an end of the threaded portion
211
b
and project from the end of the threaded portion
211
b
towards an adjusting screw
210
.
The air brush is constructed such that in situation where the finger-grip
212
is mounted in the cap member
211
as described above, when the adjusting finger-grip
212
is rotated, the abutting portion
212
c
is advanced or retreated in an axial core direction of the air brush body and, when an operating lever
204
is pulled, a rear end surface of a retreated adjusting screw
210
is abutted against a front end surface of the abutting portion
212
c
, thereby limiting the retreating amount of a needle
203
.
That is, in the air brush
200
constructed as described above, by the rotational operating of the finger-grip
212
, the front end of the abutting portion
212
c
is moved in the axial core direction, and a position at which the adjusting screw is abutted against the abutting portion when the operating lever is pulled, namely, a retreating position of the needle, is determined, whereby discharging of a certain amount of coating material can be always performed. Therefore, the air brush
200
can use the adjusting function by adjusting the rotation of the adjusting screw
210
, without the laborious work of removing the cap member when the retreating position of the needle
203
is adjusted.
SUMMARY OF THE INVENTION
As described above, the air brush
200
can easily carry out the adjusting operation of the retreating position of the needle
203
. However, the construction of the air brush
200
requires the finger-grip
212
which is threadedly mounted in the rear opening of the cap member
211
, so that the number of parts is increased and assembling steps are increased, resulting in additional manufacturing cost being incurred, as compared to the air brush
100
including the cap member
111
only.
An object of the present invention is to provide, in connection with such an air brush as stated above, an arbitrarily adjusting function of the retreating position of the needle without incurring the additional manufacturing cost, and to easily carry out discharging of a certain amount of coating material.
To attain the above object, the air brush according to the present invention includes a substantially cylindrical air brush body having a nozzle provided at a tip end thereof. Inserted into an axial core section of the air brush body is a needle for opening and closing the nozzle which is inserted into and held by a needle chuck which is mounted in the air brush body along the axial core section of the air brush body. Therefore, the needle chuck can hold at a predetermined position the needle inserted therein, and release the needle.
The needle chuck is supported, so as to advance and retract in an axial direction, by an operating lever provided at the air brush body. When the operating lever is operated rearwardly and the needle chuck is retreated, a tip end of the needle is retreated from the nozzle and the nozzle is opened, whereby discharging of coating material is carried out.
Projecting rearwardly of the rear section of the air brush body are a chuck adjusting screw for adjusting the needle chuck so as to tighten and loosen the needle chuck and a rear section of the needle.
A cap member is removably and threadedly connected to the rear section of the air brush body. When the cap member is threadedly connected to the rear section of the air brush body as described above, the adjusting screw and the rear section of the needle are housed in the cap member and covered by the cap member.
When the needle chuck is retreated by the operation of the operating lever, the needle and the chuck adjusting screw are integrally retreated. Provided in an interior of the cap member is an a
B.B. Rich Co., Ltd.
Ganey Steven J.
LandOfFree
Air brush does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Air brush, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Air brush will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3352394