Spray gun with a stabilizing structure of air output

Details Spray gun with a stabilizing structure of air output Spray gun with a stabilizing structure of air output

2002-11-12

2003-04-15

Evans, Robin O. (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Including supplemental gas shaping or shielding jet

C239S291000, C239S295000, C239S296000, C239S298000, C239S300000

Reexamination Certificate

active

06547160

ABSTRACT:

FIELD OF THE INVENTION
This invention relates to a spray gun, more particular to a spray gun with a stabilizer structure to control air outlet evenly.
BACKGROUND OF THE INVENTION
A conventional spray gun, as shown in
FIGS. 4 and 5
, comprises a spray head B threaded to the front end of a pray gun A. The spray head B is coupled with a nut C. The spray gun A comprises a spray tube A
1
at front end with a circular recess A
11
on its outer surface, three air outlets A
12
are formed between the spray tube A
1
and the circular recess A
11
, and an air outlet A
2
is formed on the outer edge of the circular recess A
11
. The spray head B comprises a pair of air outlet B
1
corresponding to and interconnecting with each other by a passage B
2
. The center portion of the spray head B has a spray hole B
3
. The spray head B also comprises an inner ring B
4
and an outer ring B
5
at inside and corresponding to the passages B
2
. The outer ring B
5
has a sealing ring B
6
sleeved thereon. The inner ring B
4
engages with the circular recess A
11
of the spray tube A
1
. An air chamber B
7
is formed between the three air outlets A
12
of the circular recess A
11
and the spray hole B
3
of the spray head B. Another air chamber B
8
is formed between the air outlet A
2
at the front end of the spray gun A and the passages B
2
of the spray head B. This design allows air to output evenly.
However, this design has some shortcomings, such as the air outlet A
2
is formed integral with the spray gun A, which aligns directly to a circular trough formed between the inner ring B
4
and the outer ring B
5
. When high pressure air is applied, a turbulence is formed and the air outputs unevenly.
The other shortcoming is that the sealing ring B
6
is hard to be taken apart from the outer ring B
5
, further a gap exists on the connection area between the spray head and the spray tube, which makes the spraying uneven as well.
SUMMARY OF THE INVENTION
It is the primary object of the present invention to provide a spray gun with a spray gun with a stabilizing structure of air output, which has an even output air.
It is another object of the present invention to provide a spray gun with a stabilizing structure of air output, which is easy to operate.
It is a further object of the present invention to provide a spray gun with a stabilizing structure of air output, which structure is solid and lasts longer.


REFERENCES:
patent: 2146416 (1939-02-01), Bramsen et al.
patent: 4392617 (1983-07-01), Bakos et al.
patent: 5344078 (1994-09-01), Fritz et al.
patent: 5799875 (1998-09-01), Weinstein et al.
patent: 6085996 (2000-07-01), Culbertson et al.
patent: 6471144 (2002-10-01), Huang

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