Fluid sprinkling – spraying – and diffusing – Including supply holder for material – Fluid pressure discharge means
Reexamination Certificate
2002-02-04
2004-03-09
Mar, Michael (Department: 3752)
Fluid sprinkling, spraying, and diffusing
Including supply holder for material
Fluid pressure discharge means
C239S302000, C239S340000, C239S369000, C239S419000, C239S433000, C239S526000
Reexamination Certificate
active
06702203
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a dual spray gun for painting and cleaning, and more particularly, to a dual spray gun that combines tin and pipe sucking methods into one set that can be used separately and independently or in a series connection so as to improve the painting or cleaning operation.
2. Description of the Prior Art
In accordance with a conventional dual spray gun for painting and cleaning used for painting priming paint or cleaning various work-pieces, whether sucking up paint or cleaner, most of the dual spray guns can be divided into a tin dual spray gun
11
, as shown in
FIG. 1
, and a pipe dual spray gun
12
, as shown in
FIG. 2
, for suiting different working environments.
For example, the tin dual spray gun
11
carries less paint or cleaner and is used in smaller working area painting or cleaning for a shorter working period, but it has shortcomings just like heavier units that limit wrist and hand dexterity making the wrist tire easily and working period shorter.
The pipe dual spray gun
12
with a long pipe
121
can use a large tank
13
at the other end of the pipe
121
, supplying more paint or cleaner to be sucked up and sprayed out for meeting the necessity of larger working areas. Meanwhile, the working radius is increased due to the pipe
121
. The pipe dual spray gun
12
, by the larger tank
13
providing more paint or cleaner, overcomes the shortcoming of interruption of the liquid in the tin, instead supplying enough liquid so that a larger working area can be processed and a larger working radius is achieved by means of the longer pipe
121
.
Although it has so many merits, there are some demerits obviously existing. For example, because the worker has to move often for adjusting position during working, sometimes he or she forgets the length limit of the pipe
121
when moving and overruns the length of the pipe
121
so that the pipe
121
is withdrawn out from the surface of the liquid in the tank and interrupts the spraying process unexpectedly affecting the quality of painting and delay work. On the other hand, the tank
13
is easily overturned by dragging the pipe
121
or by being run into by a passing worker casually to cause the paint or cleaner liquid to run out, so the operator has to pay attention to the positions of the tank
13
and the pipe
121
all the time, distracting his attention and further affecting job quality.
The above-mentioned tin and pipe spray guns are designed professionally to work independently. If the user has to use both methods on a job, he or she would buy the two kinds of dual spray guns for painting and cleaning because they can not be used convertibly or alternatively. Therefore, the cost must be higher and the operation is inconvenienced.
OBJECTS AND SUMMARY OF THE INVENTION
It is therefore a main object of the present invention to provide a combined tin and pipe dual spray gun for painting and cleaning, which can be used convertibly and alternatively in tin style and pipe style with low cost and improved operation.
REFERENCES:
patent: 1787583 (1931-01-01), Larson
patent: 1843269 (1932-02-01), Casper
patent: 2263843 (1941-11-01), Gross
patent: 3032277 (1962-05-01), Petty
patent: 3240398 (1966-03-01), Dalton, Jr.
patent: 3401842 (1968-09-01), Morrison
patent: 3432104 (1969-03-01), Kaltenbach
patent: 3714967 (1973-02-01), Zupan et al.
patent: 5765758 (1998-06-01), Chu
patent: 6142387 (2000-11-01), Jou
patent: 6383062 (2002-05-01), Jou
Baxley Charles E.
Gorman Darren
Mar Michael
LandOfFree
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