WATER PASSAGE FOR EMBEDDED ROTARY SPRINKLER

PASSAGE POUR L'EAU POUR ARROSEUR ROTATIF INTEGRE

English Abstract

A water passage for embedded rotary sprinkler includes upper and lower tubes and upper and lower covers so as to form first and second independent chambers, integral water path, and upper and lower independent chambers. The first and lower independent chambers has clockwise and counterclockwise water paths. An outer ring water path connecting the first independent chamber is formed to the lower tube. A transmission gear is arranged inside the second independent chamber. A driving shaft having an upward open is arranged between the second and the lower independent chambers. An upper end of the driving shaft is connected by a nozzle, and a plurality of lateral hole is formed to a middle of the driving shaft in the upper independent chamber. A lower end of the driving shaft having a gear engaging the transmission gear is inside the second independent chamber.

French Abstract

Un passage pour leau pour arroseur rotatif intégré comprend des tubes supérieurs et inférieurs et des couvercles supérieurs et inférieurs de manière à former des première et seconde chambres indépendantes, une voie deau intégrale et des chambres indépendantes supérieures et inférieures. La première chambre indépendante et la chambre indépendante inférieure possèdent des voies deau en sens horaire et en sens antihoraire. Une voie deau de couronne externe connectant la première chambre indépendante est formée au tube inférieur. Un pignon de transmission est placé à lintérieur de la seconde chambre indépendante. Un arbre dentraînement avec une ouverture vers le haut, placée entre la seconde chambre indépendante et la chambre indépendante inférieure. Une extrémité supérieure de larbre dentraînement est connectée par une buse, et une pluralité de trous latéraux est formée au milieu de larbre dentraînement dans la chambre indépendante supérieure. Une extrémité inférieure de larbre dentraînement possédant un engrenage mettant en prise le pignon de transmission est située à lintérieur de la seconde chambre indépendante.

Claims

CLAIMS
What is claimed is:
1. An embedded rotary sprinkler, comprising:
an upper tube having an upper receiving chamber, an upper independent chamber,
a top
receiving chamber formed above said upper receiving chamber, a through hole
formed
between said upper receiving chamber and said top receiving chamber, wherein
said
upper tube defines an upper water path, and further comprises a rod moveably
mounted
to said through hole, and a water seal ring mounted between said rod and a
side wall of
said through hole;
a lower cover;
a lower tube having a lower receiving chamber, a second independent chamber, a
lower
receiving space, and defining a lower water path, wherein said upper tube and
said lower
tube are arranged to be connected with each other to allow said upper
receiving chamber
and said lower receiving chamber to communicate with each other to form a
first
independent chamber, while said upper water path and said lower water path are
arranged
to communicate with each other to form an integral water path;
a lower independent chamber communicating with said first independent chamber,

wherein said embedded rotary sprinkler defines the integral water path
communicating
with said upper independent chamber and said lower independent chamber for
forming a
circuitous path of water in said embedded rotary sprinkler; and
a protruded axle formed on an outer bottom of said lower cover, a compress
spring and a
washer slidably mounted on said protruded axle, and a bottom tube connected to
a bottom
portion of said lower tube, wherein said lower cover has a plurality of
through holes
formed on a bottom portion thereof, wherein said bottom tube has a buffer tank
formed
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on a top thereof and defines a bottom tube hole, wherein a bottom hole linking
to said
bottom tube hole is formed to a bottom of said buffer tank, wherein a
plurality of
peripheral holes is formed to a peripheral of said buffer tank communicating
with said
bottom tube hole, wherein said washer is capable of sealing said bottom hole
of said
buffer tank, while water supplied from said peripheral holes of said bottom
tube being
sprinkled out through said upper independent chamber, excess water pressure
pushes said
washer so that excess pressurized water flows into said buffer tank so as to
be drained
through said lower independent chamber which communicates with said first
independent
chamber.
2. The embedded rotary sprinkler, as recited in claim 1, wherein said upper
tube further has a
second upper receiving chamber, while said lower tube further has a second
lower receiving
chamber, wherein said second upper receiving chamber and said second lower
receiving
chamber are combined to form said second independent chamber.
3. The embedded rotary sprinkler, as recited in claim 2, further comprising an
upper cover
provided on a top of said top receiving chamber so that said upper independent
chamber is
formed between said upper cover and a top side of said second upper receiving
chamber, wherein
a bottom portion of said upper independent chamber is arranged to communicate
with said
integral water path.
4. The embedded rotary sprinkler, as recited in claim 3, wherein said upper
tube further has an
upper axial through hole formed on the top side of said second upper receiving
chamber, a first
upper axial hole and a second upper axial hole spacedly formed in a vicinity
of said upper axial
through hole.
5. The embedded rotary sprinkler, as recited in claim 4, further comprising an
awl-shaped
column, and a splitter, wherein a bottom portion of said lower receiving space
is connected to
said bottom tube, wherein a top portion of said lower receiving space is
connected to said bottom
tube, wherein a top portion of said lower receiving space defines a linked
outer ring water path, a
clockwise water path, and a counterclockwise water path, wherein said awl-
shaped column is
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formed between said clockwise water path and said counterclockwise water path,
wherein said
splitter is arranged to said awl-shaped column.
6. An embedded rotary sprinkler, comprising:
an upper tube having an upper receiving chamber, an upper independent chamber,
a top
receiving chamber formed above said upper receiving chamber, a through hole
formed
between said upper receiving chamber and said top receiving chamber, wherein
said
upper tube defines an upper water path, and further comprises a rod moveably
mounted
to said through hole, and a water seal ring mounted between said rod and a
side wall of
said through hole;
a lower cover;
a lower tube having a lower receiving chamber, a second independent chamber, a
lower
receiving space, and defining a lower water path, wherein said upper tube and
said lower
tube are arranged to be connected with each other to allow said upper
receiving chamber
and said lower receiving chamber to communicate with each other to form a
first
independent chamber, while said upper water path and said lower water path are
arranged
to communicate with each other to form an integral water path,
a lower independent chamber communicating with said first independent chamber,

wherein said embedded rotary sprinkler defines the integral water path
communicating
with said upper independent chamber and said lower independent chamber for
forming a
circuitous path of water in said embedded rotary sprinkler, wherein said upper
tube
further has a second upper receiving chamber, while said lower tube further
has a second
lower receiving chamber, wherein said second upper receiving chamber and said
second
lower receiving chamber are combined to form said second independent chamber;
an upper cover provided on a top of said top receiving chamber so that said
upper
independent chamber is formed between said upper cover and the top side of
said second

upper receiving chamber, wherein a bottom portion of said upper independent
chamber is
arranged to communicate with said integral water path, wherein said upper tube
further
has an upper axial through hole formed on the top side of said second upper
receiving
chamber, a first upper axial hole and a second upper axial hole spacedly
formed in a
vicinity of said upper axial through hole; a bottom tube, an awl-shaped
column, and a
splitter, wherein a bottom portion of said lower receiving space is connected
to said
bottom tube, wherein a top portion of said lower receiving space is connected
to said
bottom tube, wherein the top portion of said lower receiving space defines a
linked outer
ring water path, a clockwise water path, and a counterclockwise water path,
wherein said
awl-shaped column is formed between said clockwise water path and said
counterclockwise water path, wherein said splitter is arranged to said awl-
shaped column;
and
a twisting sheet, while said splitter has a recess formed on a top portion
thereof and is
connected to said twisting sheet, wherein said twisting sheet is linked to
said rod and is
arranged to drive said splitter to selectively block one of said clockwise
water path and
said counterclockwise water path, wherein said splitter further has an awl-
shaped recess
formed on a bottom portion of said splitter for engaging with said awl-shaped
column.
7. The embedded rotary sprinkler, as recited in claim 6, wherein said lower
tube further has a
lower axial hole formed on a bottom portion of said second lower receiving
chamber, a first
lower axial hole and a second lower axial hole formed adjacent to said lower
axial hole, wherein
said lower water path is formed at two lateral sides of said first and said
second lower receiving
chambers, wherein a bottom portion of said lower water path communicates with
said lower
independent chamber.
8. The embedded rotary sprinkler, as recited in claim 7, wherein said rod has
a recess formed at
a bottom portion thereof for receiving a top portion of said twisting sheet.
9. The embedded rotary sprinkler, as recited in claim 8, further comprising a
driving shaft, a
gear, and a plurality of water seals, wherein said upper cover has an axial
hole, wherein said
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driving shaft is arranged between said upper axial through hole and said axial
hole, wherein said
water seals are arranged between said driving shaft and said upper axial
through hole and said
axial hole respectively, wherein said driving shaft has a central water path
having an upward
opening, wherein said gear is provided at a bottom portion of said driving
shaft in said second
upper receiving chamber, wherein said shaft has a plurality of lateral holes
formed to a peripheral
of a middle of said driving shaft and is arranged to communicate with said
central water path,
wherein said driving shaft further has a plurality of protruded teeth formed
at an upper end
thereof for connecting a nozzle.
10. The embedded rotary sprinkler, as recited in claim 9, further comprising a
vane gear which
comprises a column axle, and an upper gear, wherein said lower cover has a
ring tank having an
upward opening, wherein a top portion of said lower cover is fixed to said
lower receiving space
of said lower tube so as to form said lower independent chamber, wherein said
ring tank is
arranged to receive said vane gear, wherein said column axle is fitted into
said lower axial hole
of said lower tube, and said upper gear is mounted in said second lower
receiving chamber of
said lower tube.
11. The embedded rotary sprinkler, as recited in claim 10, further comprising
a transmission
gear, wherein said first and said second upper axial holes are aligned with
said first and said
second lower axial holes for receiving said transmission gear, wherein a
bottom portion of said
transmission gear is engaged by said upper gear of said vane gear, wherein a
top portion of said
transmission gear is engaged by said gear of said driving shaft, wherein water
is guided to flow
into said first independent chamber through said outer ring water path of said
lower receiving
chamber inside said lower tube and into said lower independent chamber through
one of said
clockwise water path and said counterclockwise water path, wherein said vane
gear is rotated
according to a direction of said water flow, wherein water then is guided to
flow into said
integral water path and reach said upper independent chamber, wherein said
water flowing into
said upper independent chamber is then guided to flow into said central water
path to said
nozzle.

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12. The embedded rotary sprinkler, as recited in claim 11, further comprising
a protruded axle
formed on an outer bottom of said lower cover, a compress spring and a ring
washer slidably
mounted on said protruded axle, wherein said bottom tube is connected to a
bottom portion of
said lower tube, wherein said lower cover has a plurality of through holes
formed on a bottom
portion thereof, wherein said bottom tube has a round buffer tank formed on a
top thereof, a
plurality of round holes, and a bottom tube hole linking to said round holes
is formed on a
bottom portion of said buffer tank, wherein said ring washer is arranged to
seal said round hole
of said buffer tank.
13. An embedded rotary sprinkler, comprising:
an upper tube having an upper receiving chamber, an upper independent chamber,
a top
receiving chamber formed above said upper receiving chamber, a through hole
formed
between said upper receiving chamber and said top receiving chamber, wherein
said
upper tube defines an upper water path, and further comprises a rod moveably
mounted
to said through hole, and a water seal ring mounted between said rod and a
side wall of
said through hole;
a lower cover;
a lower tube having a lower receiving chamber, a second independent chamber, a
lower
receiving space, and defining a lower water path, wherein said upper tube and
said lower
tube are arranged to be connected with each other to allow said upper
receiving chamber
and said lower receiving chamber to communicate with each other to form a
first
independent chamber, while said upper water path and said lower water path are
arranged
to communicate with each other to form an integral water path; and
a lower independent chamber communicating with said first independent chamber,

wherein said embedded rotary sprinkler defines the integral water path
communicating
with said upper independent chamber and said lower independent chamber for
forming a
circuitous path of water in said embedded rotary sprinkler, wherein said
embedded rotary
13

sprinkler further comprises a bottom tube, an awl-shaped column, and a
splitter, wherein
a bottom portion of said lower receiving space is connected to said bottom
tube, wherein
a top portion of said lower receiving space is connected to said bottom tube,
wherein the
top portion of said lower receiving space defines a linked outer ring water
path, a
clockwise water path, and a counterclockwise water path, wherein said awl-
shaped
column is formed between said clockwise water path and said counterclockwise
water
path, wherein said splitter is arranged to said awl-shaped column, wherein
said embedded
rotary sprinkler further comprises a twisting sheet, while said splitter has a
recess formed
on a top portion thereof and is connected to said twisting sheet, wherein said
twisting
sheet is linked to said rod and is arranged to drive said splitter to
selectively block one of
said clockwise water path and said counterclockwise water path, wherein said
splitter
further has an awl-shaped recess formed on a bottom portion of said splitter
for engaging
with said awl-shaped column.
14. The embedded rotary sprinkler, as recited in claim 13, further comprising
a protruded axle
formed on an outer bottom of said lower cover, a compress spring and a washer
slidably
mounted on said protruded axle, wherein said bottom tube is connected to a
bottom portion of
said lower tube, wherein said lower cover has a plurality of through holes
formed on a bottom
portion thereof, wherein said bottom tube has a buffer tank formed on a top
thereof and defines a
bottom tube hole, wherein a bottom hole linking to said bottom tube hole is
formed to a bottom
of said buffer tank, wherein a plurality of peripheral holes is formed to a
peripheral of said buffer
tank communicating with said bottom tube hole, wherein said washer is capable
of sealing said
bottom hole of said buffer tank, while water supplied from said plurality of
peripheral holes of
said bottom tube being sprinkled out through said upper independent chamber,
excess water
pressure pushes said washer so that excess pressurized water flows into said
buffer tank so as to
be drained through said lower independent chamber which communicates with said
first
independent chamber.
15. The embedded rotary sprinkler, as recited in claim 14, wherein said upper
tube further has a
second upper receiving chamber, while said lower tube further has a second
lower receiving
14

chamber, wherein said second upper receiving chamber and said second lower
receiving
chamber are combined to form said second independent chamber.
16. The embedded rotary sprinkler, as recited in claim 15, further comprising
an upper cover
arranged to said top receiving chamber so that said upper independent chamber
is formed
between said upper cover and a top side of said second upper receiving
chamber, wherein a
bottom portion of said upper independent chamber is arranged to communicate
with said integral
water path.
17. The embedded rotary sprinkler, as recited in claim 16, wherein said upper
tube further has an
upper axial through hole formed on the top side of said second upper receiving
chamber, a first
upper axial hole and a second upper axial hole spacedly formed in a vicinity
of said upper axial
through hole.
18. The embedded rotary sprinkler, as recited in claim 17, wherein said lower
tube further has a
lower axial hole formed on a bottom portion of said second lower receiving
chamber, a first
lower axial hole and a second lower axial hole formed adjacent to said lower
axial hole, wherein
said lower water path is formed at two lateral sides of said first and said
second lower receiving
chambers, wherein a bottom portion of said lower water path communicates with
said lower
independent chamber.
19. The embedded rotary sprinkler, as recited in claim 18, wherein said rod
has a recess formed
at a bottom portion thereof for receiving a top portion of said twisting
sheet.

Description

CA 02702564 2015-09-11
WATER PASSAGE FOR EMBEDDED ROTARY SPRINKLER
FIELD OF TI-IF INVENTION
The present invention relates to sprinkler, and particular to a water passage
for embedded rotary
sprinkler capable of releasing pressure automatically so as to prevent a
breakage of component.
DESCRIPTION OF THE PRIOR ART
Published patents such as U.S. Pat. Nos. 7,478,526, 7,434,747, 6,929,194, and
6,840,460
disclose different water flow passages and methods for alternate rotation of
sprinkler. However,
without a pressure release function, leak will easily happened between
components under a high
water pressure.
Therefore, through many trials and experiments, the inventor of the present
invention provide a
water passage for embedded rotary sprinkler capable of releasing pressure
automatically.
SUMMARY OF THE PRESENT INVENTION
The primary object of the present invention is to provide an embedded rotary
sprinkler capable
of releasing pressure automatically. To achieve the object, the present
invention having water
paths assembled by upper and lower tubes and covers will release excess
pressurized water to
prevent a breakage.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an exploded view showing a preferable embodiment of the present
invention.
FIG. 2 is another exploded view showing the preferable embodiment of the
present invention.
FIG. 3 is a top view of the preferable embodiment of the present invention.
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CA 02702564 2015-09-11
FIG. 4 is a cross-section view through an A-A line of the FIG. 3.
FIG. 5 is a cross-section view through a B-B line of the FIG. 3.
FIG. 6 is a cross-section view through a C-C line of the FIG. 3.
FIG. 7 is a cross-section view through a D-D line of the FIG. 5.
FIG. 8 is a cross-section view through a E-E line of the FIG. 5.
FIG. 9 is a cross-section view showing the preferable embodiment of the
present invention.
FIG. 10 is another cross-section view showing the preferable embodiment of the
present
invention.
FIG. 11 is a top view showing an upper tube of the present invention.
FIG. 12 is an upward stereograph showing the upper tube of the present
invention.
FIG. 13 is a cross-section view through a F-F line of the FIG. 11.
FIG. 14 is a cross-section view through a G-G line of the FIG. 11.
FIG. 15 is a vertical stereograph showing a lower tube of the present
invention.
FIG. 16 is an upward stereograph of the lower tube of the present invention.
FIG. 17 is a top view of the lower tube of the present invention.
FIG. 18 is an upward view of the lower tube of the present invention.
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CA 02702564 2015-09-11
FIG. 19 is a cross-section view through a H-H line of the FIG. 17.
FIG. 20 is a cross-section view through an I-I line of the FIG. 17.
FIG. 21 is a cross-section view through a J-J line of the FIG. 17.
FIG. 22 is a cross-section view through a K-K line of the FIG. 18.
FIG. 23 is a schematic view showing a preferable embodiment of a transmission
gear of the
present invention.
FIG. 24 is a schematic view showing an embedded rotary sprinkler of the
present invention.
FIG. 25 is a schematic view showing an operation of the embedded rotary
sprinkler of the
present invention.
DETAILED DESCRIPTION OF TILE INVENTION
In order that those skilled in the art can further understand the present
invention, a description
will be provided in the following in details. However, these descriptions and
the appended
drawings are only used to cause those skilled in the art to understand the
objects, features, and
characteristics of the present invention.
Referring to FIGS. 1 to 10, a water passage for embedded rotary sprinkler
according to the
present invention is illustrated. The water passage for embedded rotary
sprinkler includes an
upper tube 10, lower tube 20, upper cover 30, and a lower cover 40. A first
independent chamber
100, second independent chamber 200, integral water path 300, upper
independent chamber 400,
and a lower independent chamber 500 are formed inside of embedded rotary
sprinkler. The first
independent chamber 100 communicates with the lower independent chamber 500.
The lower
independent chamber 500 communicates with the integral water path 300. The
integral water
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CA 02702564 2015-09-11
path 300 communicates with the upper independent chamber 400. A circuitous
path of water is
formed.
The above components are further described in the following.
Referring to FIGS. 11 to 14, the upper tube 10 has a first upper receiving
chamber 11 and a
second upper receiving chamber 12 inside thereof. An upper water path 13 is
formed between the
first and the second upper receiving chamber 11 and 12. A top receiving
chamber 14 is formed
separately to a top of the upper receiving chamber II. The upper cover 30 is
arranged to the top
receiving chamber 14 so that the upper independent chamber 400 is formed
between the upper
cover 30 and a relative top of the second upper receiving chamber 12. A
through hole 15 is
formed between the first upper receiving chamber 11 and the top receiving
chamber 14. A water
seal ring 51 and a rod 50 are arranged to the through hole 15. The water seal
ring 51 is arranged
between the through hole 15 and the rod 50 so that the rod 50 is positioned
and capable of
swinging left and right. An upper axial through hole 121 is formed to a top of
the second upper
receiving chamber 12. A first upper axial hole 122 and second upper axial hole
123 are formed
next to the upper axial through hole 121 with a predetermined gap. A recess 52
is formed to a
bottom of the rod 50 so as to receive a top of a long twisting sheet 72.
Referring to FIGS. 15 to 22, the lower tube 20 has a first lower receiving
chamber 21, second
lower receiving chamber 22, lower water path 23, and lower receiving space 24.
A bottom of the
lower receiving space 24 can be connected to a bottom tube 60. A top of the
lower receiving
space 24 below the first lower receiving chamber 21 has a linked outer ring
water path 25,
clockwise water path 26, and count-clockwise water path 27. An awl-shaped
column 28 is
formed between the clockwise water path 26 and the count-clockwise water path
27. A splitter
70 is arranged to the awl-shaped column 28. The twisting sheet 72 is arranged
to a recess 71
formed to a top of the splitter 70. The twisting sheet 72 linked to the rod 50
will drive the splitter
70 to block the clockwise water path 26 or the count-clockwise water path 27.
An awl-shaped
recess 73 is formed to a bottom center of the splitter 70 so as to engage the
awl-shaped column
28 as shown in FIG. 6. A lower axial hole 221 is formed to a bottom of the
second lower
receiving chamber 22. A first lower axial hole 222 and second lower axial hole
223 are formed
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next to the lower axial hole 221. The lower water path 23 is formed to two
lateral sides of the
first and second lower receiving chambers 21 and 22. A bottom of the lower
water path 23
communicates with the lower receiving space 24. Referring to FIGS. 8, 16, and
19, an outlet of
the clockwise water path 26 has a right slope 261 inclined from up to down,
left to right so as to
form a clockwise water flow. An outlet of the counterclockwise water path 27
has a left slope
271 inclined from up to down, right to left so as to form a counterclockwise
water flow.
Referring to FIGS. 1, 4, 5, the upper cover 30 has an axial hole 31. The upper
cover 30 is fixed to
a predetermined position above the second upper receiving chamber 12 and
beside the top
receiving chamber 14 inside the upper tube 10 so that the upper independent
chamber 400 is
formed. The axial hole 31 is aligned with the upper axial hole 121 of the
second upper receiving
chamber 12. A driving shaft 80 is arranged between the upper axial hole 121
and the axial hole
31. Water seals 81 are arranged between the driving shaft 80 and the upper
axial hole 121 and
the axial hole 31 respectively. The driving shaft 80 has a central water path
82 having an upward
open. A bottom of the driving shaft 80 has a gear 83, and the gear 83 is in
the second upper
receiving chamber 12. A plurality of lateral hole 84 is formed to a peripheral
of a middle of the
driving shaft 80 which communicates with the central water path 82. The
plurality of lateral hole
84 is in the upper independent chamber 400. A plurality of protruded tooth 85
is formed near to
an upper end of the driving shaft 80 for connecting a nozzle 700 as shown in
FIGS. 24 and 25.
Referring to FIGS. 1, 2, 4, and 5, the lower cover 40 has a ring tank 41
having an upward open.
A top of the lower cover 40 is fixed to the lower receiving space 24 of the
lower tube 20 so as to
form a lower independent chamber 500. A top of the lower independent chamber
500
communicates with the clockwise water path 26, count-clockwise water path 27,
and the lower
water path 23. The ring tank 41 can receive a vane gear 90. A column axle 91
and an upper gear
92 are from above a center of the vane gear 90. The column axle 91 can be fit
into the lower
axial hole 221 of the lower tube 20, and the upper gear 92 is in the second
lower receiving
chamber 22 of the lower tube 20.
While the upper and lower tubes 10 and 20 are assembled in one, the first
upper receiving
chamber 11 and the first lower receiving chamber 21 are combined as the first
independent

CA 02702564 2015-09-11
chamber 100 and the second upper receiving chamber 12 and the second lower
receiving
chamber 22 are combined as the second independent chamber 200. The first and
second upper
axial holes 122 and 123 are aligned with the first and second lower axial
holes 222 and 223 so as
to receive a transmission gear 600 shown in FIG. 23. A bottom of the
transmission gear 600 is
engaged by the upper gear 92 of the vane gear 90. A top of the transmission
gear 600 can be
engaged by the gear 83 of the driving shaft 80. The upper water path 13 and
the lower water path
23 are combined as the integral water path 300.
Therefore, water flow came into the first independent chamber 100 through the
outer ring water
path 25 of the lower receiving space 24 inside the lower tube 20 will be
guided into the lower
independent chamber 500 through the clockwise water path 26 or the count-
clockwise water path
27. The vane gear 90 will be rotated clockwise or counterclockwise by the
direction of the water
flow. In the mean time, water flow will go into the integral water path 300
and reach the upper
independent chamber 500. Finally, water flow will go into central water path
82 to the nozzle
through the plurality of lateral hole 84.
Moreover, a plurality of through hole 42 is formed to a bottom of the lower
cover 40. A
protruded axle 43 is formed to an outer bottom of the lower cover 40. A
compress spring 44 and
a round washer 45 are slid to the protruded axle 43. A bottom tube 60 is
connected to the bottom
of the lower tube 20. The bottom tube 60 has a round butler tank 61 on a top
thereof. A round
hole 62 linking to a bottom tube hole 63 is formed to a bottom of the buffer
tank 61. A plurality
of round hole 64 is formed to a peripheral of the buffer tank 61 between the
bottom tube hole 63.
The plurality of round hole 64 communicates with the bottom tube hole 63. An
independent
chamber is formed between the buffer tank 61 and the bottom of the lower cover
40, the round
washer 45 will seal the round hole 62 of the buffer tank 61.
Therefore, while water supplied from the round hole 64 of bottom tube 60 being
sprinkled out of
the central water path 82 of the driving shaft 80 through the outer ring water
path 25 of the lower
tube 20, excess water pressure can push the round washer 45 so that excess
pressurized water
will flow into the buffer tank 61 so as to be drained through the lower
independent chamber 500.
While the water pressure is back to normal, the round washer 45 pushed by the
compress spring
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44 will seal the round hole 62 again so as to automatically adjust water
pressure.
Moreover, the transmission gear of the present invention shown in FIG. 23 is
arranged by two
sets of gear engaging to each other. Each gear set has a plurality of double-
layer gear serially link
by an axle, and the two axles are received by the first upper and lower axial
holes and the second
upper and lower axial holes respectively.
The embodiment of the water passage for embedded rotary sprinkler according to
the present
invention is shown in FIGS. 24 and 25.
The present invention is thus described, it will be obvious that the same may
be varied in many
ways. The scope of the claims should not be limited by the preferred
embodiments set forth in
the examples, but should be given the broadest interpretation consistent with
the description as a
whole.
7

Representative Drawing