CA1087651A - Sprinkler - Google Patents
SprinklerInfo
- Publication number
- CA1087651A CA1087651A CA282,144A CA282144A CA1087651A CA 1087651 A CA1087651 A CA 1087651A CA 282144 A CA282144 A CA 282144A CA 1087651 A CA1087651 A CA 1087651A
- Authority
- CA
- Canada
- Prior art keywords
- water
- inlet pipe
- pipe
- lubricant
- sprinkler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/04—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet
- B05B3/06—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet by jet reaction, i.e. creating a spinning torque due to a tangential component of the jet
Abstract
SPRINKLER
Abstract of the Disclosure A sprinkler comprises a stationary tubular housing and a water inlet pipe mounted coaxially in the housing for rotation under the reaction force of water flowing through the pipe under pressure and discharged therefrom into an outlet pipe which is connected to the inlet pipe for rotation therewith and carries a nozzle for sprinkling the discharged water. The outer surface of the inlet pipe and the inner surface of the housing form a gliding bearing and this bearing is filled with a lubricant which is so viscous that the resistance of the bearing to the rotation of the inlet pipe is approximately proportional to the rotary speed of the pipe.
Abstract of the Disclosure A sprinkler comprises a stationary tubular housing and a water inlet pipe mounted coaxially in the housing for rotation under the reaction force of water flowing through the pipe under pressure and discharged therefrom into an outlet pipe which is connected to the inlet pipe for rotation therewith and carries a nozzle for sprinkling the discharged water. The outer surface of the inlet pipe and the inner surface of the housing form a gliding bearing and this bearing is filled with a lubricant which is so viscous that the resistance of the bearing to the rotation of the inlet pipe is approximately proportional to the rotary speed of the pipe.
Description
10~37651 The present invention relates to improvements in the type of sprinkler which comprises a stationary tubular housing having an axis and defining an axially extending inner surface, a water inlet pipe mounted coaxially in the housing for rotation in relation thereto, and a water . ~ .
outlet pipe connected to the water outlet of the inlet :.
-pipe for rotation with the inlet pipe, the outlet pipe carrying a nozzle for sprinkling the discharged water. : :
The inlet pipe has an axially extending outer surface, the surfaces forming a gliding bearing between the stationary housing and the rotatable inlet pipe, a water inlet at ~' .
~ ' . .
- . ., - . . . : . . - , :,:; . - , . ~ . : . : .,:
1(~87651 one end of the pipe for connection to a source of water pressure, and a water outlet at the other end of the pipe for discharging the water under pressure when the inlet is connected to the water source, the reaction force or back pressure of the discharged water causing the water inlet pipe to rotate about the axis.
Sprinklers used in agriculture for sprinkling water over a growing crop must rotate slowly to assure proper watering of the crop, i.e. at no more than a few rotations per minute.
Conventional sprinklers of this type are provided with a pendulum. In small sprinklers, this is usually a pendulum which periodically interrupts the water jet and thus imparts a periodic impact to the sprinkler which rotates the sprinkler nozzle by a given angle. Usually, the rotating mechanism is so arranged that the sprinkler nozzles turns once about the axis in a period of about a minute. The rotary angle per impact is about 2 and is limited by the friction of the bearing. In many conventional small sprinklers of this general construction, a spring- ~
biased plastic disc provides additional braking of the rotary motion.
In large sprinklers, reaction pendulums are usually ;-provided. They, too, periodically pass through the water jet and the rotation of the sprinkler is obtained by laterally deflecting the water jet during the brief passage of the pendulum through the water jet, which imparts a thrust to the sprinkler so that it rotates by an angle of about 1. Braking is again required to limit . ~
-- .
10t~76S~l the angle of rotation and various brake means have been proposed, most of them designecl to assure one full rotation per three or four minutes.
It has also been proposed to drive rotary sprinklers without the provision of a pendulum by obliquely pos-itioning the water outlet nozzle. In such sprinklers, a friction brake is not sufficient since it would either completely stop the rotation of the sprinkler or cause it to rotate much too fast. Therefore, geared pumps have been provided as brakes for these sprinklers. The braking force of these gear pumps is approximately propor-tional to the rotary speed, and a slow and uniform rotation of the sprinkler is obtained when the nozzle has an angle of about 10. The omission of the pendulum saves costs, on the one hand, but the braking means is relatively expensive, on the other hand.
It is the primary object of this invention to provide a rotary sprinkler which avoids the costs of a pendulum as well as an expensive braking system while assuring slow and uniform rotation of the sprinkler.
This and other objects are accomplished in accordance with the invention with a very viscous libricant, such as `
oil or an oil-bitumen mixture, filling the gliding bearing between the inner surface of the stationary tubular housing and the outer surface of the water inlet pipe mounted coaxially in the housing for rotation in relation thereof, the viscosity of the lubricant being such that the resis-tance of the bearing to the rotation of the inlet pipe is approximately proportional to the rotary speed of the pipe.
It is unexpected that the high viscosity of the lubric-.
' ;' _3--- , , ~
' ~ ~ ., . .. ~ .
10l~76Sl ant sufficiently brakes the rotary movement of the sprinkler to make provision of a mechanical hraking system unnecessary.
This simple construction makes it economically possible to build even small sprinklers without a pendulum because the sprinXlers of the present invention are cheaper to manufacture than the conventional sprinklers with a pendulum. Furthermore, they are more compact and are less sensitive to damage in rough agricultural use than pendulum sprinklers.
In accordance with one aspect of the present invention, there is provided a sprinkler comprising' stationary tubular housing having an axis, the housing defining an axially extending inner sur~ace, a water inlet pipe mounted coaxially in the housing for rotati.on in relation thereto, the inlet pipe having an axially extending outer surface,, the surfaces forming a gliding bearing between the stationary housing and the rotatable inlet pipe, and said outer surface including an axially extending groove for receiving lubricant, a water inlet at one end of the pipe for connection to a source of water under pressure, and a water outlet at the other end of the pipe for discharging the water under pressure when the inlet is connected to the water source, the reaction force of the discharged water causing the water inlet pipe-to rotate about the axis, a lubricant having a viscosity of from 5,000 to 500,000 centistokes at 20C filling the gliding bearing between the surfaces, including said groove, the viscosity of the lubricant thereby being such that the resistance of the bearing to the rotation of the inlet pipe is approximately pro-; portional to the rotary speed of the pipe, said lubricant thereby imparting a braking effect to the relative rotational movement of said inlet pipe and said tubular housing, and a water outlet pipe connected to the water outlet for rotation with the inlet pipej the outlet pipe carrying a nozzle for sprinkling the dis-charged water.
~he above and other objects, advantages and features _4_ B`
. .
of this invention will become re apparent from the following detailed description of a now preferred embodiment thereof, taken in conjunction with the accompanying drawing wherein Fig. 1 is a perspective view of a sprinkler according to the invention, Fig. 2 is an axial section of the sprinkler of Fig. l, - and Fig. 3 is a section along line III-III of Fig. 2.
Referring now to the drawing, the sprinkler comprises stationary tubular housing 1 which defines an axially extending inner surface 3 and water inlet pipe 2 mounted coaxially in housing l for rotation in relation thereto. The inlet pipe has an axially extending outer surface 4, the surfaces 3 and 4 forming a gliding bearing between the stationary housing and the rotatable inlet pipe.
Tubular housing 1 has an outer thread 13 at an inlet end thereof for threaded attachment to a feedpipe ~not shown).
The feedpipe is in communication with a source of water under pressure. The water inlet pipe has a water -4a-.."".
B
1~76Sl inlet at the inlet end to receive the water under pressure when the inlet is connected to the water source, and a water outlet at the other end of the pipe for discharging the water under pressure when the inlet is connected.
The reaction force or back pressure of the discharged water causes water inlet pipe 2 to rotate about its axis.
Inlet pipe 2 is held in position in housing l against axial displacement by annular shoulder 9 engaging a matching abutment in housing l at one end while ball bearing 6 in annular groove 5 of the housing is mounted at the opposite end.
The outlet end of rotatable pipe 2 has an outer thread 14 for threaded attachment of connecting member lO,thereto, ball bearing 7 being arranged between the facing ends of stationary housing l and connecting member lO to enable the connecting member to rotate with inlet pipe 2. Connecting member lO carries radially extending water outlet pipe ll mounted in the connecting member by ball bearing 12 and the outer end of the water outlet pipe carries water sprinXling nozzle 8. The rotatable mounting of the water outlet pipe in the connecting member enables repositioning of nozzle 8 in any desired position. , Water under pressure flows through the axial bore of inlet pipe 2 into the axial bore in connecting member lO which is in communication with the axial bore in outlet pipe ll to discharge the flowing water through nozzle 8 which sprinkles a water jet over the ground. By rotating the-water outlet pipe in the direction of arrow A, the ' . . ' .: . ,' direction of the discharged water jet can be changed, causing a corresponding change in the reaction ~orce or back pressure of the water causing the rotation of inlet pipe 2 and connecting member 10 and outlet pipe 11 connected thereto for rotation therewith.
As shown in FIG. 2, outer surface 4 of water inlet pipe 2 defines axially extending groove 15 for receiving a lubricant. In accordance with the present invention, ~:
the entire space between the surfaces, which form a gliding bearing, is filled with a very viscous lubricant.
, ...
The viscosity of the lubricant is such that the resistance of the bearing to the rotation of the inlet pipe is approximately proportional to the rotary speed of the pipe. -Throughout the specification and claims, the term :
"very viscous lubricant" designates one which produces ~
a frictional resistance proportional to the rotary : -speed, which is equal or in excess of the bearing friction.
The bearing friction is independent of the rotary speed and is determined essentially by the friction of the gaskets and the gliding surface characteristics of bearing surfaces 3 and 4.
, Economically suitable lubricants meeting this standard are oil or oil-bitumen mixtures having a viscosity of 5000 to 500,000 centistokes at 20C, preferably 20,000 .~,. ..... .
to 40,000 centistokes.
A sprinkler of the described and illustrated structure whose gliding bearing was filled with a lubricant having -. .
10~7~
a viscosity of 40,000 at 20C, and which was operated with a water pressure of 6 atmospheres, recorded a rotary speed of one rotation per 3 to 4 minutes. When the temperature of the water was raised to 30C, the viscosity of the lubricant decreased to about 18,000 centristokes, changing the rotary speed to one rotation per 1.5 to 2 minutes. On the other hand, reducing the water temperature caused the viscosity of the lubricant to rise. At a water temperature of 10C, the rotary speed of the sprinkler was about one rotation in about 8 minutes.
.
~ .
-7- ~
.
outlet pipe connected to the water outlet of the inlet :.
-pipe for rotation with the inlet pipe, the outlet pipe carrying a nozzle for sprinkling the discharged water. : :
The inlet pipe has an axially extending outer surface, the surfaces forming a gliding bearing between the stationary housing and the rotatable inlet pipe, a water inlet at ~' .
~ ' . .
- . ., - . . . : . . - , :,:; . - , . ~ . : . : .,:
1(~87651 one end of the pipe for connection to a source of water pressure, and a water outlet at the other end of the pipe for discharging the water under pressure when the inlet is connected to the water source, the reaction force or back pressure of the discharged water causing the water inlet pipe to rotate about the axis.
Sprinklers used in agriculture for sprinkling water over a growing crop must rotate slowly to assure proper watering of the crop, i.e. at no more than a few rotations per minute.
Conventional sprinklers of this type are provided with a pendulum. In small sprinklers, this is usually a pendulum which periodically interrupts the water jet and thus imparts a periodic impact to the sprinkler which rotates the sprinkler nozzle by a given angle. Usually, the rotating mechanism is so arranged that the sprinkler nozzles turns once about the axis in a period of about a minute. The rotary angle per impact is about 2 and is limited by the friction of the bearing. In many conventional small sprinklers of this general construction, a spring- ~
biased plastic disc provides additional braking of the rotary motion.
In large sprinklers, reaction pendulums are usually ;-provided. They, too, periodically pass through the water jet and the rotation of the sprinkler is obtained by laterally deflecting the water jet during the brief passage of the pendulum through the water jet, which imparts a thrust to the sprinkler so that it rotates by an angle of about 1. Braking is again required to limit . ~
-- .
10t~76S~l the angle of rotation and various brake means have been proposed, most of them designecl to assure one full rotation per three or four minutes.
It has also been proposed to drive rotary sprinklers without the provision of a pendulum by obliquely pos-itioning the water outlet nozzle. In such sprinklers, a friction brake is not sufficient since it would either completely stop the rotation of the sprinkler or cause it to rotate much too fast. Therefore, geared pumps have been provided as brakes for these sprinklers. The braking force of these gear pumps is approximately propor-tional to the rotary speed, and a slow and uniform rotation of the sprinkler is obtained when the nozzle has an angle of about 10. The omission of the pendulum saves costs, on the one hand, but the braking means is relatively expensive, on the other hand.
It is the primary object of this invention to provide a rotary sprinkler which avoids the costs of a pendulum as well as an expensive braking system while assuring slow and uniform rotation of the sprinkler.
This and other objects are accomplished in accordance with the invention with a very viscous libricant, such as `
oil or an oil-bitumen mixture, filling the gliding bearing between the inner surface of the stationary tubular housing and the outer surface of the water inlet pipe mounted coaxially in the housing for rotation in relation thereof, the viscosity of the lubricant being such that the resis-tance of the bearing to the rotation of the inlet pipe is approximately proportional to the rotary speed of the pipe.
It is unexpected that the high viscosity of the lubric-.
' ;' _3--- , , ~
' ~ ~ ., . .. ~ .
10l~76Sl ant sufficiently brakes the rotary movement of the sprinkler to make provision of a mechanical hraking system unnecessary.
This simple construction makes it economically possible to build even small sprinklers without a pendulum because the sprinXlers of the present invention are cheaper to manufacture than the conventional sprinklers with a pendulum. Furthermore, they are more compact and are less sensitive to damage in rough agricultural use than pendulum sprinklers.
In accordance with one aspect of the present invention, there is provided a sprinkler comprising' stationary tubular housing having an axis, the housing defining an axially extending inner sur~ace, a water inlet pipe mounted coaxially in the housing for rotati.on in relation thereto, the inlet pipe having an axially extending outer surface,, the surfaces forming a gliding bearing between the stationary housing and the rotatable inlet pipe, and said outer surface including an axially extending groove for receiving lubricant, a water inlet at one end of the pipe for connection to a source of water under pressure, and a water outlet at the other end of the pipe for discharging the water under pressure when the inlet is connected to the water source, the reaction force of the discharged water causing the water inlet pipe-to rotate about the axis, a lubricant having a viscosity of from 5,000 to 500,000 centistokes at 20C filling the gliding bearing between the surfaces, including said groove, the viscosity of the lubricant thereby being such that the resistance of the bearing to the rotation of the inlet pipe is approximately pro-; portional to the rotary speed of the pipe, said lubricant thereby imparting a braking effect to the relative rotational movement of said inlet pipe and said tubular housing, and a water outlet pipe connected to the water outlet for rotation with the inlet pipej the outlet pipe carrying a nozzle for sprinkling the dis-charged water.
~he above and other objects, advantages and features _4_ B`
. .
of this invention will become re apparent from the following detailed description of a now preferred embodiment thereof, taken in conjunction with the accompanying drawing wherein Fig. 1 is a perspective view of a sprinkler according to the invention, Fig. 2 is an axial section of the sprinkler of Fig. l, - and Fig. 3 is a section along line III-III of Fig. 2.
Referring now to the drawing, the sprinkler comprises stationary tubular housing 1 which defines an axially extending inner surface 3 and water inlet pipe 2 mounted coaxially in housing l for rotation in relation thereto. The inlet pipe has an axially extending outer surface 4, the surfaces 3 and 4 forming a gliding bearing between the stationary housing and the rotatable inlet pipe.
Tubular housing 1 has an outer thread 13 at an inlet end thereof for threaded attachment to a feedpipe ~not shown).
The feedpipe is in communication with a source of water under pressure. The water inlet pipe has a water -4a-.."".
B
1~76Sl inlet at the inlet end to receive the water under pressure when the inlet is connected to the water source, and a water outlet at the other end of the pipe for discharging the water under pressure when the inlet is connected.
The reaction force or back pressure of the discharged water causes water inlet pipe 2 to rotate about its axis.
Inlet pipe 2 is held in position in housing l against axial displacement by annular shoulder 9 engaging a matching abutment in housing l at one end while ball bearing 6 in annular groove 5 of the housing is mounted at the opposite end.
The outlet end of rotatable pipe 2 has an outer thread 14 for threaded attachment of connecting member lO,thereto, ball bearing 7 being arranged between the facing ends of stationary housing l and connecting member lO to enable the connecting member to rotate with inlet pipe 2. Connecting member lO carries radially extending water outlet pipe ll mounted in the connecting member by ball bearing 12 and the outer end of the water outlet pipe carries water sprinXling nozzle 8. The rotatable mounting of the water outlet pipe in the connecting member enables repositioning of nozzle 8 in any desired position. , Water under pressure flows through the axial bore of inlet pipe 2 into the axial bore in connecting member lO which is in communication with the axial bore in outlet pipe ll to discharge the flowing water through nozzle 8 which sprinkles a water jet over the ground. By rotating the-water outlet pipe in the direction of arrow A, the ' . . ' .: . ,' direction of the discharged water jet can be changed, causing a corresponding change in the reaction ~orce or back pressure of the water causing the rotation of inlet pipe 2 and connecting member 10 and outlet pipe 11 connected thereto for rotation therewith.
As shown in FIG. 2, outer surface 4 of water inlet pipe 2 defines axially extending groove 15 for receiving a lubricant. In accordance with the present invention, ~:
the entire space between the surfaces, which form a gliding bearing, is filled with a very viscous lubricant.
, ...
The viscosity of the lubricant is such that the resistance of the bearing to the rotation of the inlet pipe is approximately proportional to the rotary speed of the pipe. -Throughout the specification and claims, the term :
"very viscous lubricant" designates one which produces ~
a frictional resistance proportional to the rotary : -speed, which is equal or in excess of the bearing friction.
The bearing friction is independent of the rotary speed and is determined essentially by the friction of the gaskets and the gliding surface characteristics of bearing surfaces 3 and 4.
, Economically suitable lubricants meeting this standard are oil or oil-bitumen mixtures having a viscosity of 5000 to 500,000 centistokes at 20C, preferably 20,000 .~,. ..... .
to 40,000 centistokes.
A sprinkler of the described and illustrated structure whose gliding bearing was filled with a lubricant having -. .
10~7~
a viscosity of 40,000 at 20C, and which was operated with a water pressure of 6 atmospheres, recorded a rotary speed of one rotation per 3 to 4 minutes. When the temperature of the water was raised to 30C, the viscosity of the lubricant decreased to about 18,000 centristokes, changing the rotary speed to one rotation per 1.5 to 2 minutes. On the other hand, reducing the water temperature caused the viscosity of the lubricant to rise. At a water temperature of 10C, the rotary speed of the sprinkler was about one rotation in about 8 minutes.
.
~ .
-7- ~
.
Claims (3)
1. A sprinkler comprising:
(a) stationary tubular housing having an axis, the housing defining an axially extending inner surface, (b) a water inlet pipe mounted coaxially in the housing for rotation in relation thereto, the inlet pipe having:
(1) an axially extending outer surface, the surfaces forming a gliding bearing between the stationary housing and the rotatable inlet pipe, and said outer surface including an axially extending groove for receiving lubricant, (2) a water inlet at one end of the pipe for connection to a source of water under pressure, and (3) a water outlet at the other end of the pipe for discharging the water under pressure when the inlet is connected to the water source, the rea-ction force of the discharged water causing the water inlet pipe to rotate about the axis, (c) a lubricant having a viscosity of from 5,000 to 500,000 cenistokes at 20°C filling the gliding bearing between the surfaces, including said groove, the viscosity of the lub-ricant thereby being such that the resistance of the bearing to the rotation of the inlet pipe is approximately proportional to the rotary speed of the pipe, said lubricant thereby imparting a braking effect,to the relative rotational movement of said inlet pipe and said tubular housing, and (d) a water outlet pipe connected to the water outlet for rotation with the inlet pipe, the outlet pipe carrying a nozzle for sprinkling the discharged water.
(a) stationary tubular housing having an axis, the housing defining an axially extending inner surface, (b) a water inlet pipe mounted coaxially in the housing for rotation in relation thereto, the inlet pipe having:
(1) an axially extending outer surface, the surfaces forming a gliding bearing between the stationary housing and the rotatable inlet pipe, and said outer surface including an axially extending groove for receiving lubricant, (2) a water inlet at one end of the pipe for connection to a source of water under pressure, and (3) a water outlet at the other end of the pipe for discharging the water under pressure when the inlet is connected to the water source, the rea-ction force of the discharged water causing the water inlet pipe to rotate about the axis, (c) a lubricant having a viscosity of from 5,000 to 500,000 cenistokes at 20°C filling the gliding bearing between the surfaces, including said groove, the viscosity of the lub-ricant thereby being such that the resistance of the bearing to the rotation of the inlet pipe is approximately proportional to the rotary speed of the pipe, said lubricant thereby imparting a braking effect,to the relative rotational movement of said inlet pipe and said tubular housing, and (d) a water outlet pipe connected to the water outlet for rotation with the inlet pipe, the outlet pipe carrying a nozzle for sprinkling the discharged water.
2. The sprinkler of claim 1, wherein the lubricant is oil.
3. The sprinkler of claim 1, wherein the lubricant is a mixture of oil and bitumen.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT531676A AT344435B (en) | 1976-07-19 | 1976-07-19 | SPRINKLER |
| ATA5316/76 | 1976-07-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1087651A true CA1087651A (en) | 1980-10-14 |
Family
ID=3574434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA282,144A Expired CA1087651A (en) | 1976-07-19 | 1977-07-06 | Sprinkler |
Country Status (15)
| Country | Link |
|---|---|
| JP (1) | JPS5334398A (en) |
| AT (1) | AT344435B (en) |
| AU (1) | AU512847B2 (en) |
| BR (1) | BR7704753A (en) |
| CA (1) | CA1087651A (en) |
| DE (1) | DE2729451A1 (en) |
| ES (1) | ES460826A1 (en) |
| FR (1) | FR2358931A1 (en) |
| GB (1) | GB1573365A (en) |
| GR (1) | GR66042B (en) |
| IL (1) | IL52510A0 (en) |
| IN (1) | IN147514B (en) |
| IT (1) | IT1084335B (en) |
| YU (1) | YU178877A (en) |
| ZA (1) | ZA774091B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT365478B (en) * | 1979-08-30 | 1982-01-25 | Oesterr Salen Kunststoffwerk | SPRINKLER |
| JPH0724802B2 (en) * | 1990-10-04 | 1995-03-22 | 晋 新宮 | Bonding structure of liquid channel cylinders in a fountain |
| US5670824A (en) * | 1994-12-22 | 1997-09-23 | Pacsetter, Inc. | Vertically integrated component assembly incorporating active and passive components |
| US5964414A (en) * | 1998-04-30 | 1999-10-12 | Stoneage, Inc | High pressure liquid rotary nozzle with viscous retarder |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH102922A (en) * | 1922-12-06 | 1924-01-16 | Similor Sa | Rotary sprinkler. |
| US1977763A (en) * | 1932-02-01 | 1934-10-23 | Gordon Philippi | Balanced sprinkler bearing |
| US2086515A (en) * | 1935-12-12 | 1937-07-06 | Allen W D Mfg Co | Sprinkler |
| FR1321580A (en) * | 1962-02-09 | 1963-03-22 | Improvements to rotary sprinklers | |
| DE1632916A1 (en) * | 1968-03-08 | 1970-08-20 | Anger Kunststoff | Sprinkler |
| JPS564317B2 (en) * | 1972-03-15 | 1981-01-29 |
-
1976
- 1976-07-19 AT AT531676A patent/AT344435B/en not_active IP Right Cessation
-
1977
- 1977-06-30 DE DE19772729451 patent/DE2729451A1/en not_active Withdrawn
- 1977-07-06 CA CA282,144A patent/CA1087651A/en not_active Expired
- 1977-07-07 ZA ZA00774091A patent/ZA774091B/en unknown
- 1977-07-11 IN IN1061/CAL/77A patent/IN147514B/en unknown
- 1977-07-11 AU AU26907/77A patent/AU512847B2/en not_active Expired
- 1977-07-12 IL IL52510A patent/IL52510A0/en unknown
- 1977-07-14 IT IT25743/77A patent/IT1084335B/en active
- 1977-07-15 GB GB29903/77A patent/GB1573365A/en not_active Expired
- 1977-07-16 ES ES460826A patent/ES460826A1/en not_active Expired
- 1977-07-18 YU YU01788/77A patent/YU178877A/en unknown
- 1977-07-18 GR GR53976A patent/GR66042B/el unknown
- 1977-07-19 BR BR7704753A patent/BR7704753A/en unknown
- 1977-07-19 FR FR7722096A patent/FR2358931A1/en active Granted
- 1977-07-19 JP JP8571677A patent/JPS5334398A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| IL52510A0 (en) | 1977-10-31 |
| GB1573365A (en) | 1980-08-20 |
| ES460826A1 (en) | 1978-04-16 |
| FR2358931A1 (en) | 1978-02-17 |
| IN147514B (en) | 1980-03-22 |
| JPS5334398A (en) | 1978-03-30 |
| AU512847B2 (en) | 1980-10-30 |
| YU178877A (en) | 1982-06-30 |
| ATA531676A (en) | 1977-11-15 |
| DE2729451A1 (en) | 1978-01-26 |
| BR7704753A (en) | 1978-05-02 |
| ZA774091B (en) | 1978-05-30 |
| IT1084335B (en) | 1985-05-25 |
| FR2358931B1 (en) | 1983-10-14 |
| GR66042B (en) | 1981-01-14 |
| AU2690777A (en) | 1979-01-18 |
| AT344435B (en) | 1978-07-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |