Air-pressure sprayer structure

Details Air-pressure sprayer structure Air-pressure sprayer structure

2002-04-17

2004-06-22

Nguyen, Dinh Q. (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Including supply holder for material

Fluid pressure discharge means

C222S470000, C222S518000

Reexamination Certificate

active

06752331

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention is related to an improved air-pressure sprayer structure, comprising a container, a cover unit, an air-pump unit, a spray mouthpiece unit, and a water-stop valve wherein said cover unit, engaged with said water-stop valve at one side and said air-pump unit at the other side, is screw jointed to said container and attached to said spray mouthpiece unit for use. Said air-pump unit is provided with an air-relief valve through which extra air can be released when said container is saturated with air, preventing the danger of explosion due to over air pressure to achieve the purpose of safety.
Please refer to
FIG. 1. A
conventional air-pressure sprayer is made up of a container
10
, a cover body
11
, a water-outlet pipe
12
, a press body
13
, a water-stop valve
14
, a locating means
15
, a valve rod
16
, a sleeve tube
17
, and a spray nozzle
18
. The container
10
is provided with outer threads
101
and a water opening
102
disposed at the upper section thereof A projected pivot slot
111
and a receiving groove
112
defined by said projected pivot slot
111
are disposed at the top face of the cover body
11
. The receiving groove
112
is equipped with an indented locating slot
1121
at one side and a handle
113
at the other side. The cover body
11
is provided with a screw body
114
disposed at the opposite side of the handle
113
thereof to be engaged with the spray nozzle
18
having spray port
181
disposed at the center thereof via internal threads
182
disposed at one end thereof. A water-discharge hole
115
is disposed at the center of the screw body
114
at one end, connecting with a through hole
1151
at other end thereof via the water-outlet pipe
12
led through the passage there-between. The underside of the cover body
11
is provided with a screw fixing hole
116
, extending downwards under the projected pivot slot
111
, and internal threads with an anti-leak ring
118
disposed at the interior side thereof. The press body
13
comprises a locating slot
131
with an abutting part
132
having a blocking flange
132
disposed at the front thereof, and a locating hole
134
with a pair of locating posts
133
extending downwards at the front surface thereof.
The water-stop valve
14
has a water-stop part
141
disposed at one end, a water-outlet part
143
having an anti-leak washer
144
and a spring
142
sleeve jointed at the middle section thereof, and a fixing part
146
with a block body
145
disposed thereon at the other end thereof. The locating means
15
has a locating recess
151
disposed at one side with an abutting plate
152
disposed at the top thereof. The valve rod
16
comprises a knob
161
with a stop ring
162
disposed at the upper section, a rod body
163
disposed at the lower section with a valve body
165
having an anti-leak ring
164
disposed thereon being screwed to the bottom of the rod body
163
. The sleeve tube
17
is provided with an anti-leak ring
172
and a projecting flange
173
with external threads section
171
disposed at the upper end thereof, and a through hole
175
circled by a multiple of air ports
174
at the bottom center thereof. A guard valve
176
having a fixing post
177
disposed thereon is attached to the bottom of the sleeve tube.
17
via the fixing post
177
thereof being inserted into said through hole
175
thereof.
Thus, a conventional air-pressure sprayer can be assembled by the parts and structure above as shown in FIG.
2
. Please refer to FIG.
3
. In operation, water is poured into said container
10
via said water opening
102
. Said knob
161
of said valve rod
16
is then drawn up and down to pump air into said container
10
. When said container
10
is saturated with air, said press body
13
is pushed downwards, pulling back said water-stop valve
14
hooked to said locating means
15
by the block body
145
thereof, and dislocating said water-stop part
141
of said water-stop valve
14
to move from the spray port
181
of said spray nozzle
18
for the air enclosed within said container
10
to escape therefrom. Meanwhile, water is bought out by the outflow air pressure, flowing through said pipe
12
to the water-discharge hole
115
thereof to be released from said spray nozzle
18
via said spray port
181
as shown in FIG.
3
.
There are several drawbacks to such conventional air-pressure sprayer. First, without an air-relief valve, a saturated container like said container
10
can be easily exploded due to over air-pressure if said valve rod
16
keeps pumping in air. Second, said water-stop valve
14
, aligned in a straight line with said press body
13
, might reduce the pulling force due to the right-angle formed by the push-and-pull movement thereof, making said spring
142
easily worn out and thus resulting in the leak of both air and water. Third, said guard valve
176
, simply joined to said sleeve tube
17
, is easily distorted, causing the pumped-in air to flow back to said sleeve tube
17
and making said container
10
hard to retain sufficient air pressure for use. Fourth, said guard valve
176
is complicated, boosting the cost of production. Fifth, said spray nozzle
18
can only be pointed transversely at one direction, greatly limiting the range of use of said conventional air-pressure sprayer.
SUMMARY OF THE PRESENT INVENTION
It is, therefore, the primary purpose of the present invention to provide an improved air-pressure sprayer structure wherein, via the safety device of an air-relief valve, a saturated container will stop taking in more air if a valve rod keeps pumping in air, avoiding the danger of explosion due to over air-pressure for the purpose of safety.
It is, therefore, the second purpose of the present invention to provide an improved air-pressure sprayer structure wherein a slide block is applied to locate a press body in an attitude of constant spraying without interruption. Moreover, the force applied onto said press body is parallel to the movement of a water-stop valve to reach a balance of forces in operation, preventing the distortion of said water-stop valve and the leak of both air and water.
It is, therefore, the third purpose of the present invention to provide an improved air-pressure sprayer structure wherein when the container is saturated with air, a valve guard member will be pressed by air-pressure to abut tightly against the bottom of a sleeve part, avoiding the pumped-in air to escape from the container. Moreover, said valve guard member is abutted against a pair of protecting arms disposed at the bottom of said sleeve part, preventing the distortion of said valve guard member and effectively retaining air-pressure within the container for use.
It is, therefore, the fourth purpose of the present invention to provide an improved air-pressure sprayer structure wherein said valve guard member is easily and quickly made, economically saving the time and cost of production.
It is, therefore, the fifth purpose of the present invention to provide an improved air-pressure sprayer structure wherein a spray mouthpiece unit, jointed to a cover unit via a pivot body, can be moved upwards and downwards to point at different directions for use. Besides, a set of loose-proof bolt and nut is applied to prevent the leak of water.


REFERENCES:
patent: 2091735 (1937-08-01), Jepson
patent: 3282510 (1966-11-01), Van Schwartz
patent: 4537334 (1985-08-01), Spengler et al.

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