Fluid sprinkling – spraying – and diffusing – Distributor continuously moves relative to support during... – Including deflector
Reexamination Certificate
2003-05-13
2004-10-26
Nguyen, Dinh Q. (Department: 3752)
Fluid sprinkling, spraying, and diffusing
Distributor continuously moves relative to support during...
Including deflector
C239S240000, C239S394000, C239S222190, C239S222210, C239S390000, C239SDIG001
Reexamination Certificate
active
06808129
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a spraying device for a lawn sprinkler. It is equipped with a circular base mount, a coupling board, a rotary sprinkling cover, a central flexible control piece and a water sprinkling blade assembly wherein the center of the circular base mount is disposed a water outlet having a securing hole in registration with the downward protrusion of the coupling board. The thermal meatball ring on the coupling board is used to make the coupling board secured to the rotary sprinkling cover by way of ultrasonic melting art The inner space of the rotary sprinkling cover is divided into an inner and outer sections. At the center of the rotary sprinkling cover is disposed a cavity for housing of the retaining part, a spring, a support member and a seal ring and a water outlet screen cap of the central flexible control piece. The retaining hole of the screen cap is provided with a rotary shaft for the water sprinkling blade assembly so as to make the blade assembly to be horizontally positioned in the cavity whereby the water can be sprinkled evenly and smoothly from the sprinkling ports without interference or interruption by the blade assembly.
Referring to
FIG. 1
, the first prior art lawn sprinkler
10
is made up of a base mount
11
and a spraying cap
12
. A water inlet coupler
111
extends from one side of the base mount
11
and a circular platform
112
surrounded by a peripheral flange with a registration hole
113
defined at the center thereof and a water inlet
114
is disposed next to the registration hole
113
. A retaining rib
115
having a retaining cut
1151
. The spraying cap
12
is equipped with a plurality of spraying holes
121
in various patterns. A plurality of fixing legs
122
are disposed at the bottom of a central projection so as to register with the registration hole
113
of the base mount
11
. The spraying holes
121
are provided with a stop wing
123
respectively distributed in radial directions. As the spraying cap
12
is rotated to one of the stop wings
123
and registered with the retaining cut
1151
of the retaining rib
115
, one of the spraying holes
121
will become in alignment with the water inlet
114
so that water can be discharged from that spraying hole
121
as long as a water supply pipe is coupled with the water inlet coupler
11
.
Such a prior art has a disadvantage given as follows: in particular, the center of the spraying cap
12
of the sprinkler
10
is not equipped with any spraying hole, so water can only be jetted or discharged by way of the peripherally disposed spraying holes
121
. It is relatively simple and monotonous.
Referring to
FIGS. 3
,
4
, the second prior art lawn sprinkler
20
comprises a round base mount
21
, a coupling disc
22
and a rotary spraying cap
23
wherein the round base mount
21
has a central projected outlet
211
having a side coupler
212
in communication: with a water outlet
213
having a seal ring disposed therein. The central outlet
211
is provided with a fixing cavity
214
with which the retaining post
221
of the coupling disc
22
is registered. Next to the fixing cavity
214
is disposed a retaining post
215
based on a flexibly actuated plate. There are a plurality of round holes
222
defined around the periphery of the coupling disc
22
. Each retaining recess
223
corresponding to the retaining post
215
is respectively disposed under the periphery of the round holes
222
. A delicate protruded ring of melting connection
224
placed in alignment with the boundaries defined under the various spraying holes
231
is melted to created a closed wall to divide the internal space of the rotary spraying cap
23
into an inner and outer space. The center of the rotary spraying cap
23
has a centrally projected ball like pored sprayer
232
. There are two closure discharge outlets
233
placed in opposition, the outer periphery are disposed spraying pores
234
. The retaining post
221
is placed in the fixing cavity
214
with a proper clearance left therebetween so as to permit the coupling disc
22
to smoothly spin when the rotary spraying cap
23
is rotated in operation. As soon as the rotary spraying cap
23
is rotated to such a position that the surrounding walls of the ball like central pored sprayer
232
and one of the closure discharge outlets
233
comes into registration with the water outlet
213
, water is then led to the inner space of the rotary spraying cap
23
and discharged via the central pored sprayer
232
.
Such a second prior art lawn sprinkler
20
has the following disadvantage: the central pored sprayer
232
is integrally formed with the rotary spraying cap
23
and the top of the same is equipped with a ball shaped protrusion, resulting in the relatively bulky size in packing of the sprinkler in one aspect and the easy damage of the central pored sprayer
232
in transportation in another aspect.
Referring to
FIGS. 5
,
6
, the third prior art lawn sprinkler
30
comprises a base mount
31
, a rotary spraying cap
32
and a splattering blade assembly
33
wherein the base mount
31
has a flat top coupling face
311
with a central registration cavity
312
. At one side of the flat top coupling face
311
is disposed a downwardly extended L-shaped inlet passage
313
having a connection head
3131
and on the other side is disposed a flexible spot protrusion
314
. The rotary spraying cap
32
is provided with a protruded post
321
which is in registration with the registration cavity
312
of the base mount
31
so as to permit the rotary spraying cap
32
to be rotatable. On the top face of the rotary spraying cap
32
are disposed a plurality of spraying holes
322
of various patterns and a central pored spraying outlet
323
in communication with a closure spraying hole
324
. The spraying holes
322
and the closure spraying hole
324
are in communication with the water outlet hole
325
which can be positioned in communication alignment with the inlet passage
313
when the rotary spraying cap
32
is rotated. There are a plurality of retaining cavities
326
corresponding to the water outlet hole
325
and registrable with the flexible spot protrusion
314
. The shaft hole
331
of the blade assembly
33
is housed a bushing
332
having a pivot pole
333
which is engaged with the pivot hole
3231
of the central pored spraying outlet
323
.
There are a number of disadvantages associated with the third prior art lawn sprinkler
30
given as follows:
1. The central pored spraying outlet
323
of the lawn sprinkler
30
is integrally formed with the rotary spraying cap
32
which has a ball shaped central surface. When the splattering blade assembly
33
is registered with the pivot hole
3231
defined on the spraying outlet
323
, it will render the size of packing and delivery increased and the superficial face of the pored spraying outlet
323
is easily damaged as a result of impact
2. The splattering blade assembly
33
is mounted on top of the rotary spraying cap
32
, as water is sprayed out of the spraying hole
322
via the sloped peripheral surface
3221
, the sprayed water will be interfered by the blade assembly
33
in the area A as shown in
FIG. 6
, spoiling the spraying path of water.
3. The blade assembly
33
in rotation will be easily got stuck with the pivot pole
333
due to rotary friction, causing the rotary operation without smoothness.
SUMMARY OF THE INVENTION
Therefore, the primary object of the present invention is to provide a spraying device for a lawn sprinkler wherein the blade assembly can be retractably housed in a fixing cavity so as to allow the blade assembly to be received in flush with the top surface of the rotary spraying cap to reduce the packing size and to protect the blade assembly from damage as a result of impact.
Another object of the present invention is to provide a spraying device for a lawn sprinkler wherein the blade assembly can be selectively concealed in or popped out of a fixing cavity by means of a central flexible
Nguyen Dinh Q.
Troxell Law Office PLLC
Yuan Mei Corp.
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