CA1173025A - Fluid agitator assembly - Google Patents
Fluid agitator assemblyInfo
- Publication number
- CA1173025A CA1173025A CA000371068A CA371068A CA1173025A CA 1173025 A CA1173025 A CA 1173025A CA 000371068 A CA000371068 A CA 000371068A CA 371068 A CA371068 A CA 371068A CA 1173025 A CA1173025 A CA 1173025A
- Authority
- CA
- Canada
- Prior art keywords
- reservoir
- casing
- deposits
- output shaft
- liquid
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
- F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/25—Mixers with both stirrer and drive unit submerged in the material being mixed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/81—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow
- B01F27/811—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow with the inflow from one side only, e.g. stirrers placed on the bottom of the receptacle, or used as a bottom discharge pump
- B01F27/8111—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow with the inflow from one side only, e.g. stirrers placed on the bottom of the receptacle, or used as a bottom discharge pump the stirrers co-operating with stationary guiding elements, e.g. surrounding stators or intermeshing stators
Abstract
ABSTRACT OF THE DISCLOSURE
The present invention discloses a fluid agitator assembly comprising an underwater motor having an output shaft extending downwardly on which an impeller is mounted fixedly, and a pump casing mounted on the lower end portion of the motor and provided with an inlet port in the lower end and at least one discharge port in the circumferential wall thereof, wherein the improvement is characterized in that the position and the number of the discharge ports are made variable. Due to such construction the fluid agitator assembly can have an agitating effect sufficient to attain rapid and vigorous flotation of deposits.
The present invention discloses a fluid agitator assembly comprising an underwater motor having an output shaft extending downwardly on which an impeller is mounted fixedly, and a pump casing mounted on the lower end portion of the motor and provided with an inlet port in the lower end and at least one discharge port in the circumferential wall thereof, wherein the improvement is characterized in that the position and the number of the discharge ports are made variable. Due to such construction the fluid agitator assembly can have an agitating effect sufficient to attain rapid and vigorous flotation of deposits.
Description
~ 173025 The present inventiorl relates to a fluid agitator assembly for ayitating liquid to float deposits in the liquid in a reservoir storing water containing not-get-hardened concrete slurry or lime etc., or water such as filthy water containing much foul matters.
The conventional fluid agitator has a disadvantage that it is difficult to attain sufficient flotation of deposits since an agitating force produced does not diffuse sufficient-ly and uniformly from the periphery of an agitator body along the overall bottom surface of a liquid reservoir, with the result that the force is converted into an upward flow.
The present invention has been perfected with a view to providing a solution for the above mentioned problem, and has for its object to provide an improved fluid agitator assembly which has an agitating effect sufficient to attain rapid and vigorous flotation of deposits.
Accordingly, the invention is broadly claimed herein as a fluid agitator for agitating a liquid in a reservoir to effect flotation of deposits in the reservoir, comprising an underwater motor having an output shaft, said output shaft having its axis generally vertically disposed during operation of the fluid agitator, said shaft having a lower longitudinal end portion, an impeller fixedly mounted on said lower longitudinal end portion of said output shaft, a pump casing mounted on the lower end of said motor, said impeller being rotatably disposed in said casing, a frame extending from the bottom of said casing and adapted to be disposed on the bottom of said reservoir to support the agitator, said casing having an inlet port at the lower end thereof, said casing having a peripheral wall, and at least three discharge ports equidis-tantly disposed in said peripheral wall, said each discharge port opening in the reservoir in a direction tangential to ~ 173025 said peripheral wall of said c~sing, whereby liquid in the reservoir along with the deposits in such liquid are drawn in through said inlet port and discharged through said discharge ports into the reservoir to thereby subject the liquid and its deposits in the reservoir to vigorous agitation.
Other aspects, advantages and features of the present invention will become apparent from the following detailed description with reference to the accompanying drawings.
Fig. 1 is a front view of an embodiment of the present invention;
Fig. 2 is a front view showing another embodiment o the present invention;
Fig. 3 is a vertical section view showing essential parts of the embodiment of the present invention shown in Fig. 2;
Figs. 4, 5, 6 and 7 are bottom view of the embodi-ments o the present invention each having a different pump casing; and Fig. 8 is a front view o an embodiment of the pre-sent invention wherein no perforate strainer is used.
Referring now to Fig. 1 of the drawings, which shows the apparatus of the first embodiment, an underwater motor 2 of the completely waterproof type having an output shaft 3 on which an impeller 1 is mounted ixedly is placed in the water with the output shaft 3 being extended downwardly. A pump casing 6 is mounted on the underside of the motor 2 such that it concentrically surrounds the output shaft 3 and the impeller 1. The pump casing 6 is provided on the center of its under-side with an inlet port 4 and on its circumferential wall with one or more discharge ports 5, as best shown in Figs. 4 to 7.
At the underside of the casing 6, there is provided with a perforated stra1ner 7 having a plurality of apertures of a B
, .. -- . , ... . . ~ . .. . ~ .
t 17302S
desired diameter and being fixed on the lower end of the pump casing. The strainer 7 is then suppor-ted on the bottom wall 11 of a water reservoir by a frame 10.
In the second embodiment of the present invention shown in Figs. 2 and 3, the lower end portion of the output shaft 3 of the underwater motor 2 is extending downwardly through the inlet port 4 of the pump casing 6 and a central throughhole 8 formed in the strainer 7, and a stirring blade 9 is mounted on the end portion of the output shaft 3 fixedly.
An injection nozzle 12 indicated by phantom lines is coupled to each of the discharge port 5 in the pump casing 6 by a flange coupling as shown in Figs. 1 and 2. The injection nozzle 12 is designed to freely shift its injection direction by changing the angular position thereof relative to the circumference of the flange surface of the discharge port 5.
A flexible hose 13 of a desired length may be mounted at the extending end of the nozzle 12. Alternatively, the flexible hose 13 may be substituted for the nozzle 12. Since, in elther case, the flexible hose 13 moves wriggly upon receipt of the counterforce of water, thus further enhanciny the random movement of the injection direction of the nozæle 12.
Explanation of the operation of the fluid agitator assembly according to the present inven~ion will now be made.
In the case of the first embodiment of the present invention wherein no stirring blade is used, the ayitator assembly issunk into the water containiny much deposits stored in a water reservoir, and is placed in position on the bottom wall of the reservoir. Then the underwater motor 2 is actuated. Actuation of the motor 2 causes rotation of the impeller 1 fixedly mounted on the output shaft 3 thereof, so that the water around the perforated strainer 7 together with deposits accumulated thereunder is forcinyly suc~led into the ! 1 7 3 0 2 5 pump casing 6 through the apertures of the strainer 7 and the inlet port 4 of the casing G. Thc water and the deposits sucked in the casing 6 are then discharged through the discharge port 5 and the injection nozzle 12 and/or the flexible hose 13 as a jet flow into the reservoir in a predetermined direction (for example, a direction normal or parallel to the bottom surface of the reservoir, or an upward direction), whereby the water and deposits within the reservoir are subjected to the vigorous agitating action of the water jet.
In the case of a second embodiment of the present invention wherein the stirring blade 9 is used, an agitator assembly is operated substantially in the same manner as in the first embodiment. However, different from the first embodiment, the stirring of the output shaft 3 of the motor 2 is also provided with the stirring blade 9 on the end portion thereof in such a manner that it is rotated together with the impeller 1. Due to such construction, the rotation of the output shaft 3 can provide a far greater agitating force than the output shaft of the first embodiment. Namely, when the stirring blade 9 is rotated simultaniously with the impeller 1, the water under the perforated strainer 7 is caused to move toward the blade 9, and is forcingly fed in the direction parallel to the bottom surface of the reservoir by the blade 9. The energy contained in that moving water gives sufficient agitation of deposits built up on the bottom of the reservoir, thereby to create a turbulent flow causing the deposits suspended in the water. Such a turbulent flow is guided in the upward and radial direction by the counter-force of the bottom wall, and moves toward the perforate strainer 7. The turbulent flow is then vigorously sucked into the pump casing 6 through the apertures of the perforated strainer 7 and the inlet port 8 by the rotation of the rotating impeller 1, and is discharged as a jet flow into the reservoir through the - discharge port 5 and the injection nozzle 12 and/or the flexible hose 13, thereby the water in the reservoir is vigor-ously agitated.
In the above mentioned first and second embodiments, the direction and the number of the injection nozzles 12 can be adjusted at will by changing the angular position thereof relative to the circumference of the flange of the discharge port 5. This renders it possible either to effect uniform agitation over the entire bottom of the reservoir, or to effect local agitation only with respect to the area of the bottom of the reservoir on which considerable amounts of deposits are accumulated. In addition, provision of the flexible hose 13 allows for random variation of the injecting direction of the discharged water in the reservoir. This ensures rapid, vigorous and uniform floation of deposits that are built up not only on the area of the bottom of the reservoir positioning under the agitator assembly, but also on the overall bottom thereof, and prevents re-settling of the suspended matters in the water.
While the present invention has been described with re~erence to spccific embodiments, the present invention is not limited thereto. It will therefore be understood that various changes or modifications may be carried out without departing from the spirit and scope of the appended claims.
The conventional fluid agitator has a disadvantage that it is difficult to attain sufficient flotation of deposits since an agitating force produced does not diffuse sufficient-ly and uniformly from the periphery of an agitator body along the overall bottom surface of a liquid reservoir, with the result that the force is converted into an upward flow.
The present invention has been perfected with a view to providing a solution for the above mentioned problem, and has for its object to provide an improved fluid agitator assembly which has an agitating effect sufficient to attain rapid and vigorous flotation of deposits.
Accordingly, the invention is broadly claimed herein as a fluid agitator for agitating a liquid in a reservoir to effect flotation of deposits in the reservoir, comprising an underwater motor having an output shaft, said output shaft having its axis generally vertically disposed during operation of the fluid agitator, said shaft having a lower longitudinal end portion, an impeller fixedly mounted on said lower longitudinal end portion of said output shaft, a pump casing mounted on the lower end of said motor, said impeller being rotatably disposed in said casing, a frame extending from the bottom of said casing and adapted to be disposed on the bottom of said reservoir to support the agitator, said casing having an inlet port at the lower end thereof, said casing having a peripheral wall, and at least three discharge ports equidis-tantly disposed in said peripheral wall, said each discharge port opening in the reservoir in a direction tangential to ~ 173025 said peripheral wall of said c~sing, whereby liquid in the reservoir along with the deposits in such liquid are drawn in through said inlet port and discharged through said discharge ports into the reservoir to thereby subject the liquid and its deposits in the reservoir to vigorous agitation.
Other aspects, advantages and features of the present invention will become apparent from the following detailed description with reference to the accompanying drawings.
Fig. 1 is a front view of an embodiment of the present invention;
Fig. 2 is a front view showing another embodiment o the present invention;
Fig. 3 is a vertical section view showing essential parts of the embodiment of the present invention shown in Fig. 2;
Figs. 4, 5, 6 and 7 are bottom view of the embodi-ments o the present invention each having a different pump casing; and Fig. 8 is a front view o an embodiment of the pre-sent invention wherein no perforate strainer is used.
Referring now to Fig. 1 of the drawings, which shows the apparatus of the first embodiment, an underwater motor 2 of the completely waterproof type having an output shaft 3 on which an impeller 1 is mounted ixedly is placed in the water with the output shaft 3 being extended downwardly. A pump casing 6 is mounted on the underside of the motor 2 such that it concentrically surrounds the output shaft 3 and the impeller 1. The pump casing 6 is provided on the center of its under-side with an inlet port 4 and on its circumferential wall with one or more discharge ports 5, as best shown in Figs. 4 to 7.
At the underside of the casing 6, there is provided with a perforated stra1ner 7 having a plurality of apertures of a B
, .. -- . , ... . . ~ . .. . ~ .
t 17302S
desired diameter and being fixed on the lower end of the pump casing. The strainer 7 is then suppor-ted on the bottom wall 11 of a water reservoir by a frame 10.
In the second embodiment of the present invention shown in Figs. 2 and 3, the lower end portion of the output shaft 3 of the underwater motor 2 is extending downwardly through the inlet port 4 of the pump casing 6 and a central throughhole 8 formed in the strainer 7, and a stirring blade 9 is mounted on the end portion of the output shaft 3 fixedly.
An injection nozzle 12 indicated by phantom lines is coupled to each of the discharge port 5 in the pump casing 6 by a flange coupling as shown in Figs. 1 and 2. The injection nozzle 12 is designed to freely shift its injection direction by changing the angular position thereof relative to the circumference of the flange surface of the discharge port 5.
A flexible hose 13 of a desired length may be mounted at the extending end of the nozzle 12. Alternatively, the flexible hose 13 may be substituted for the nozzle 12. Since, in elther case, the flexible hose 13 moves wriggly upon receipt of the counterforce of water, thus further enhanciny the random movement of the injection direction of the nozæle 12.
Explanation of the operation of the fluid agitator assembly according to the present inven~ion will now be made.
In the case of the first embodiment of the present invention wherein no stirring blade is used, the ayitator assembly issunk into the water containiny much deposits stored in a water reservoir, and is placed in position on the bottom wall of the reservoir. Then the underwater motor 2 is actuated. Actuation of the motor 2 causes rotation of the impeller 1 fixedly mounted on the output shaft 3 thereof, so that the water around the perforated strainer 7 together with deposits accumulated thereunder is forcinyly suc~led into the ! 1 7 3 0 2 5 pump casing 6 through the apertures of the strainer 7 and the inlet port 4 of the casing G. Thc water and the deposits sucked in the casing 6 are then discharged through the discharge port 5 and the injection nozzle 12 and/or the flexible hose 13 as a jet flow into the reservoir in a predetermined direction (for example, a direction normal or parallel to the bottom surface of the reservoir, or an upward direction), whereby the water and deposits within the reservoir are subjected to the vigorous agitating action of the water jet.
In the case of a second embodiment of the present invention wherein the stirring blade 9 is used, an agitator assembly is operated substantially in the same manner as in the first embodiment. However, different from the first embodiment, the stirring of the output shaft 3 of the motor 2 is also provided with the stirring blade 9 on the end portion thereof in such a manner that it is rotated together with the impeller 1. Due to such construction, the rotation of the output shaft 3 can provide a far greater agitating force than the output shaft of the first embodiment. Namely, when the stirring blade 9 is rotated simultaniously with the impeller 1, the water under the perforated strainer 7 is caused to move toward the blade 9, and is forcingly fed in the direction parallel to the bottom surface of the reservoir by the blade 9. The energy contained in that moving water gives sufficient agitation of deposits built up on the bottom of the reservoir, thereby to create a turbulent flow causing the deposits suspended in the water. Such a turbulent flow is guided in the upward and radial direction by the counter-force of the bottom wall, and moves toward the perforate strainer 7. The turbulent flow is then vigorously sucked into the pump casing 6 through the apertures of the perforated strainer 7 and the inlet port 8 by the rotation of the rotating impeller 1, and is discharged as a jet flow into the reservoir through the - discharge port 5 and the injection nozzle 12 and/or the flexible hose 13, thereby the water in the reservoir is vigor-ously agitated.
In the above mentioned first and second embodiments, the direction and the number of the injection nozzles 12 can be adjusted at will by changing the angular position thereof relative to the circumference of the flange of the discharge port 5. This renders it possible either to effect uniform agitation over the entire bottom of the reservoir, or to effect local agitation only with respect to the area of the bottom of the reservoir on which considerable amounts of deposits are accumulated. In addition, provision of the flexible hose 13 allows for random variation of the injecting direction of the discharged water in the reservoir. This ensures rapid, vigorous and uniform floation of deposits that are built up not only on the area of the bottom of the reservoir positioning under the agitator assembly, but also on the overall bottom thereof, and prevents re-settling of the suspended matters in the water.
While the present invention has been described with re~erence to spccific embodiments, the present invention is not limited thereto. It will therefore be understood that various changes or modifications may be carried out without departing from the spirit and scope of the appended claims.
Claims
1. A fluid agitator for agitating a liquid in a reservoir to effect flotation of deposits in the reservoir, comprising an underwater motor having an output shaft, said output shaft having its axis generally vertically disposed during operation of the fluid agitator, said shaft having a lower longitudinal end portion, an impeller fixedly mounted on said lower longitudinal end portion of said output shaft, a pump casing mounted on the lower end of said motor, said impeller being rotatably disposed in said casing, a frame extending from the bottom of said casing and adapted to be dis-posed on the bottom of said reservoir to support the agitator, said casing having an inlet port at the lower end thereof, said casing having a peripheral wall, and at least three dis-charge ports equidistantly disposed in said peripheral wall, said each discharge port opening in the reservoir in a direc-tion tangential to said peripheral wall of said casing, whereby liquid in the reservoir along with the deposits in such liquid are drawn in through said inlet port and discharged through said discharge ports into the reservoir to thereby subject the liquid and its deposits in the reservoir to vigorous agitation.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55019510A JPS5850531B2 (en) | 1980-02-19 | 1980-02-19 | fluid stirring device |
| JP55-19510 | 1980-02-19 | ||
| JP55-19986 | 1980-02-19 | ||
| JP1998680U JPS5925464Y2 (en) | 1980-02-19 | 1980-02-19 | fluid stirring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1173025A true CA1173025A (en) | 1984-08-21 |
Family
ID=26356343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000371068A Expired CA1173025A (en) | 1980-02-19 | 1981-02-17 | Fluid agitator assembly |
Country Status (11)
| Country | Link |
|---|---|
| AU (1) | AU526578B2 (en) |
| BE (1) | BE887543A (en) |
| CA (1) | CA1173025A (en) |
| DE (1) | DE3105765A1 (en) |
| ES (1) | ES499569A0 (en) |
| FR (1) | FR2475925B1 (en) |
| GB (1) | GB2070687B (en) |
| IT (1) | IT1143515B (en) |
| NL (1) | NL190359C (en) |
| PT (1) | PT72526B (en) |
| SE (1) | SE447065B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4456424A (en) * | 1981-03-05 | 1984-06-26 | Toyo Denki Kogyosho Co., Ltd. | Underwater sand pump |
| IN160534B (en) * | 1982-10-28 | 1987-07-18 | Goodwin R Int Ltd | |
| AU585654B2 (en) * | 1985-10-04 | 1989-06-22 | Aeration & Allied Technology Pty Limited | Improved conversion of septic tanks and holding wells to secondary treatment |
| US5238363A (en) * | 1987-10-30 | 1993-08-24 | Baker Hughes Incorporated | Dual suction vertical pump with pendant auger |
| JPH0617032Y2 (en) * | 1987-11-18 | 1994-05-02 | 三菱電機株式会社 | In-tank fuel pump |
| SE464318B (en) * | 1990-02-28 | 1991-04-08 | Flygt Ab | SHAFT CONSTRUCTION FOR A PUMP WHEEL ROTARY RUBBER |
| GB2249135A (en) * | 1990-10-03 | 1992-04-29 | Mars G B Ltd | A centrifugal impeller |
| JP3672505B2 (en) * | 2001-06-19 | 2005-07-20 | 株式会社東洋電機工業所 | Submersible agitation pump |
| BR122019010137B1 (en) | 2007-05-21 | 2020-03-10 | Weir Minerals Australia Limited | FLOW DIRECTION DEVICE USED TO DIRECT MATERIAL IN RELATION TO AN ADJACENT ROTOR IN MOTION |
| CN102434492A (en) * | 2011-12-22 | 2012-05-02 | 上海成峰流体设备有限公司 | Stirring pump base with two layers of spaces |
| JP6590143B2 (en) * | 2014-06-26 | 2019-10-16 | ドラグフロウ エス．アール．エル．Ｄｒａｇｆｌｏｗ Ｓ．Ｒ．Ｌ． | underwater pump |
| ITUB20155592A1 (en) * | 2015-10-26 | 2017-04-26 | Silla Martini | CENTRIFUGAL AERATOR FOR LAKES AND / OR SIMILAR |
| CN109611347A (en) * | 2018-12-12 | 2019-04-12 | 孔祥真 | Centralized liquid relaying compression air compressor machine |
| CN111102203B (en) * | 2019-12-31 | 2021-03-12 | 江苏阿兰贝尔环保科技有限公司 | Smash integration pump station that draws water |
| CN113339270B (en) * | 2021-06-16 | 2022-06-21 | 江苏大学镇江流体工程装备技术研究院 | Solid-liquid separation type non-clogging pump |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL27347C (en) * | ||||
| BE361098A (en) * | ||||
| NL68749C (en) * | 1946-03-30 | |||
| FR947264A (en) * | 1946-06-05 | 1949-06-28 | Suzler Freres | Fragmentation device |
| GB773351A (en) * | 1954-08-05 | 1957-04-24 | Jacuzzi Bros Inc | Improvements in or relating to hydrotherapy apparatus |
| GB891152A (en) * | 1957-11-21 | 1962-03-14 | Peter Willems | A method and apparatus for continuously changing the structure of substances or mixtures of such substances |
| DE1528766A1 (en) * | 1964-04-29 | 1970-01-22 | Hans Grenzebacch | Pump for pumping out a viscous medium, e.g. Alluvial dung, from a storage container |
| DE1301957B (en) * | 1965-02-08 | 1969-08-28 | Baehrs Adolf | Motor-driven well pump with vertical shaft |
| DE1528969C3 (en) * | 1966-01-28 | 1974-04-11 | Diedrich Baehrs, Landmaschinen, Inhaber Adolf Baehrs, 2873 Bookholzberg | Slurry pump |
| FR2453669A1 (en) * | 1979-04-12 | 1980-11-07 | Iakovenko Marinitch Nicolas | four-function mixer - interchanged by axial displacement of turbine. i.e. for suctioning fluid at desired depth, grinding particles, homogenising and pumping |
-
1981
- 1981-02-05 SE SE8100828A patent/SE447065B/en not_active IP Right Cessation
- 1981-02-06 NL NLAANVRAGE8100598,A patent/NL190359C/en not_active IP Right Cessation
- 1981-02-16 AU AU67322/81A patent/AU526578B2/en not_active Ceased
- 1981-02-17 DE DE19813105765 patent/DE3105765A1/en not_active Withdrawn
- 1981-02-17 BE BE0/203811A patent/BE887543A/en not_active IP Right Cessation
- 1981-02-17 FR FR8103089A patent/FR2475925B1/en not_active Expired
- 1981-02-17 GB GB8104989A patent/GB2070687B/en not_active Expired
- 1981-02-17 CA CA000371068A patent/CA1173025A/en not_active Expired
- 1981-02-17 PT PT72526A patent/PT72526B/en not_active IP Right Cessation
- 1981-02-18 IT IT8167227A patent/IT1143515B/en active
- 1981-02-18 ES ES499569A patent/ES499569A0/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| NL190359C (en) | 1994-02-01 |
| PT72526B (en) | 1982-02-26 |
| FR2475925B1 (en) | 1987-05-22 |
| SE8100828L (en) | 1981-08-20 |
| AU526578B2 (en) | 1983-01-20 |
| NL8100598A (en) | 1981-09-16 |
| IT8167227A0 (en) | 1981-02-18 |
| GB2070687B (en) | 1984-11-14 |
| PT72526A (en) | 1981-02-26 |
| ES8204303A1 (en) | 1982-05-01 |
| AU6732281A (en) | 1981-09-03 |
| FR2475925A1 (en) | 1981-08-21 |
| ES499569A0 (en) | 1982-05-01 |
| IT1143515B (en) | 1986-10-22 |
| SE447065B (en) | 1986-10-27 |
| BE887543A (en) | 1981-06-15 |
| GB2070687A (en) | 1981-09-09 |
| NL190359B (en) | 1993-09-01 |
| DE3105765A1 (en) | 1982-01-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |