CA2140776A1 - A method of determining the amount of waste deposited on filter cloths of a drum filter and a device for carrying out the method - Google Patents
A method of determining the amount of waste deposited on filter cloths of a drum filter and a device for carrying out the methodInfo
- Publication number
- CA2140776A1 CA2140776A1 CA 2140776 CA2140776A CA2140776A1 CA 2140776 A1 CA2140776 A1 CA 2140776A1 CA 2140776 CA2140776 CA 2140776 CA 2140776 A CA2140776 A CA 2140776A CA 2140776 A1 CA2140776 A1 CA 2140776A1
- Authority
- CA
- Canada
- Prior art keywords
- drum
- filter
- shaft
- level
- 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.)
- Abandoned
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention relates to a method of determining the amount of waste deposited on filter cloths of the drum (1) of a drum filter rotatably suspended on a shaft (4). Recorded are the changes in the total mass (weight) of the drum (1) of the drum filter which correspond to the changes in the amount of waste deposited on filter cloths and to the changes in the height of the level of soiled liquid inside the drum (1) of the drum filter. The device for carrying out the method comprises a drum (1) rotatably suspended on at least two suspension-type supporting members (2) embracing the shaft (4) mounted on the stationary frame (6) of the drum filter. At least one force recorder (7) is provided for between the shaft (4) and the stationary frame (6).
Description
~-` 21~0776 . ~
A Method_ of Determilling the ~mount of Waste Veposi.te~
on F_lter_Cloths of a Drum Filter and a Device for Carrying Out the Method Technical Field The invention relates to a method of determining the amount of waste deposited on filter cloths on the shaft of a rotatably suspended drum of a drum filter in which soiled liquid is inside the drum whose lower part is immersed in the filtered liquid, and the level of the soiled liquid inside the drum is higher than the level of the filtered liquid outside said drum.
The invention also relates to a device for carrying out said method comprising a drum of a drum filter rotatably mounted on at~least two suspension-type supporting members embracing a shaft seated on the stationary frame of the drum filter, with soiled liquid situated inside the drum, the lower part of the drum immersed in the filtered liquid, and the level of the soiled liquid inside the drum of the drum filter higher than the level of the filtered liquid outside said drum.
Background of the Invention Drum filters contain a rotatably mounted drum fitted on its circumference with filter cloths and with two face holes out of which through one, an inlet hole, soiled liquid, as a rule water, is led inside, while through the other, the outlet hole, impurities are let out, for instance by means of an off-take '4~EJ\ OED SJt~E,r ~-` 21~0776 trough. The lower part of the drum filter is immersed in the filtered liquid, and the level of soiled liquid inside the drum of the drum filter is higher than the level of the filtered liquid outside the drum filter.
In the heretofore known devices, the determining of the waste amount deposited on the filter cloth of a drum filter is carried out by deYices recording the level heights inside and outside the drum of the drum filter, for instance by means of float-operated switching on and off systems, or by means of electro-nic, pressure or optical feelers disadvantageous in that they are apt easily to take up the waste contained in the soiled liquid with the ensuing deterioration of the functional accuracy.
The rotation of the drum of the drum filter results in undulation of the liquid levels which is another cause o incorrect working of the level height feelers. In addition to the limited reliability of the function, other drawbacks ~f the known devices consist in their complicated design, high production costs, and poor response to the changes in the level height.
.
The drawback of the undulation of the level recorded by means of a float has ben removed in the US patent specification No. 3,837,216 dealing with the measuring of the concentration of a solution float-in8 in a liquid in a drum filter into whose container there is fed a soiled liquid in which is mounted the 1-drum of the drum filter, on whose circumference the is led the filtering substance. The contaminants gather on the outer surface of the drum whose rotation speed is adjusted in accordance with the height of the level in the container. Ne~t to said container and in~erconnected with it there is provided a vertical ~Q~lF~nr 21 4077~ ~
t ;-::
A Method_ of Determilling the ~mount of Waste Veposi.te~
on F_lter_Cloths of a Drum Filter and a Device for Carrying Out the Method Technical Field The invention relates to a method of determining the amount of waste deposited on filter cloths on the shaft of a rotatably suspended drum of a drum filter in which soiled liquid is inside the drum whose lower part is immersed in the filtered liquid, and the level of the soiled liquid inside the drum is higher than the level of the filtered liquid outside said drum.
The invention also relates to a device for carrying out said method comprising a drum of a drum filter rotatably mounted on at~least two suspension-type supporting members embracing a shaft seated on the stationary frame of the drum filter, with soiled liquid situated inside the drum, the lower part of the drum immersed in the filtered liquid, and the level of the soiled liquid inside the drum of the drum filter higher than the level of the filtered liquid outside said drum.
Background of the Invention Drum filters contain a rotatably mounted drum fitted on its circumference with filter cloths and with two face holes out of which through one, an inlet hole, soiled liquid, as a rule water, is led inside, while through the other, the outlet hole, impurities are let out, for instance by means of an off-take '4~EJ\ OED SJt~E,r ~-` 21~0776 trough. The lower part of the drum filter is immersed in the filtered liquid, and the level of soiled liquid inside the drum of the drum filter is higher than the level of the filtered liquid outside the drum filter.
In the heretofore known devices, the determining of the waste amount deposited on the filter cloth of a drum filter is carried out by deYices recording the level heights inside and outside the drum of the drum filter, for instance by means of float-operated switching on and off systems, or by means of electro-nic, pressure or optical feelers disadvantageous in that they are apt easily to take up the waste contained in the soiled liquid with the ensuing deterioration of the functional accuracy.
The rotation of the drum of the drum filter results in undulation of the liquid levels which is another cause o incorrect working of the level height feelers. In addition to the limited reliability of the function, other drawbacks ~f the known devices consist in their complicated design, high production costs, and poor response to the changes in the level height.
.
The drawback of the undulation of the level recorded by means of a float has ben removed in the US patent specification No. 3,837,216 dealing with the measuring of the concentration of a solution float-in8 in a liquid in a drum filter into whose container there is fed a soiled liquid in which is mounted the 1-drum of the drum filter, on whose circumference the is led the filtering substance. The contaminants gather on the outer surface of the drum whose rotation speed is adjusted in accordance with the height of the level in the container. Ne~t to said container and in~erconnected with it there is provided a vertical ~Q~lF~nr 21 4077~ ~
t ;-::
-2~- .
column having a recording float on the liquid surface, thus removing the faults due to the liquid undulation in the cont~irler. The other a~ove menti.o~ Ir~wl~.~ck.~
discussed with respect to the preceding cases apply to :
this case as well. ~-Disclosure of the Invention The above specified drawbacks are removed by a method of determining the amount of waste deposited on filter cloths of the drum of a drum filter rotatab-ly suspended on a shaft whose principle consists in that there are recorded the changes in the total mass (weight) of the drum of the drum filter which correspond to the changes in the amount of waste deposited on filter cloths and to the changes in -the height of the level of soiled liquid inside the :.
drum of the drum filter.
The device for carrying out the method according to the invention comprises a drum rotatably suspended on at least two suspension-type supporting membe~s embracing a shaft seated on the stationary frame of the drum filter, and its principle consists in that at least one force recorder is provided for between the shaft and the stationary frame of the drum filter.
~ 0 .. .. . i . . .. . .
21~776 ~ W094/0379~ PCT/CZ~3100019 In a preferred embodiment, the force recorder is sea~ed under the shaft at the place where the shaft is embraced by the support~ng member.
The shat can be mounted on a le~er swingingly seated on the stationar~ frame o the drum filter, the force recorder being se~ted between the free arm of the lever and the stationary frame of the drum filter.
The advantage of the method according to the invention consists in the accuracy of determining the le~el height difference inside and outside the drum of the drum filter and, in particular, high reliability regardless of the amount of waste deposit--ed on the feelers. The ad~antage of the device accor~-ing to the in~ention consists in its simple design due to its location outside the i~ner space of the drum.
' Brief DescriPtion of_the_Drawin8 An e~ample of embodiment of a device for carrying out the method according ~o the invention is schemati-cally represented in the accompanying drawing showing thejface of the drum of the drum filter.
Modes for Carrylng Out the Invention Drum filters are use~ for filtering soiled liquids, in particular water. The drum filter comprises a drum 1 consisting in a well-known manner of two faces with horizontal a~is interconnected by not shown reinforcing me~bers, with not shown filter cloths mounted along the circumference W~94/03790 P~T/C~93/~0~19 of the drum. The fil~er cloths are mounted in a known manner which is not the sub~ect of this Patent Appli-cation.
The lower part of the drum 1 of the drum filter is immersed in the (readg-~filtered liquid. The soiled li~uid is in a well-known manner led into the -inner space of the drum 1 of the drum filter, and its level height is superior to the le~el height of the (ready)-filtered liquid. The le~el height difference provides -for the hydrostatic pressure responsible for the fil~ering -process going on.
The drum 1 of the drum filter is rotatably mounted on suspension-type supporting members 2 em-bracin~ a shaft 4, in the shown e~ample of embodiment a roller 3 mounted on the shaft 4. In the shown e~àm-ple of embodiment, the shaft 4 i~ rotatably seated in the body of a single-arm leYer 5 swingingly mounted on a stationary frame 6 of the drum filter. Between the arm end of thè single-arm lever 5 and the stationar~ frame 6 is situated a force recorder 7 at a d~stance from th`e fulcrum of the single-arm le~er 5 greater than the shaft 4. In the shown example of embodiment, the suspension-type supporting members 2 are two in number and they embrace the circumference ~ , , .
of the drum 1 of the drum filter. However, the number of the suspension-type supporting member~ can be more than two. The terminal (outward) suspension-t~pe members 2 can embrace well-known not represented supporting rings fixed to the faces of the drum 1 of the drum filter. At least one of the suspension-type ~upporting members 2 is coupled with a not shown well-known driving device controlled by a not shown well-known control unit which is by means of a not , j 21 ~ 0 7 7 6 PCT/CZg3/00019 shown line connected with the force recorder 7.
In another embodiment, the single-arm le~er 5 can be replaced b~ a double-arm lever.
On the stationary frame 6 of the drum filter is rotatably mounted a stabilizing roller 8 touching the circumference of the drum 1 of the drum filter and stabilizing its position during the rotation of the drum l, in particular in its initial and final phases of rotation, i.e., in the s~art and stop-motiQn phases in which impacts occur. More than one piece of the stsbilizing roiler 8 can be used.
The suspens~on-type supporting members 2 can embraee the shaft 4 directly, with no rollers 3 inter-po:8ed ~betweèn them, and the force recorders 7 may h~: ba in other embodiments located~between the shaft 4 and the stationary frame 6 of the drum filter, at leas~ one force recorder 7 of any known type being obligatory for each drum 1. ~lso, the shaft 4 can be suspended on the force recorder 7 at due place.
In :the shown e~ample of embodiment, the shaft ~: 4 is made as a through shaft throughout the length , , o~i the drum 1. However, it can also be made as a diYided shaft seated in a well-known way on the stati-: onary frame 6 of the drum 1 of the drum filtèr.
Soiled liquid led into the inner space of the drum 1 of the drum f~lter passes during the filtering proce~s through the filtering cloths arran8ed on the circumference of the drum 1 and on which deposits the waste while the (ready-)filtered liquid is col-lected in the space outside the drum 1 and is in ~' r ~ ` ~
W094/03790 2 1 4 0 7 7 6 PCT/C~93/00019 a well-known manner led away from there. The hydrostatic pressure due to ~he level height difference inside and outside the drum 1 keeps the filtering process going on. The waste continuously depositing on the filter cloths impairs their permea-bility for the liquid, and the leYel inside the drum 1 rises. When the amount of the waste deposi~ed on the filter ~loths is excessive, it is necessary to turn the drum 1 a bit; at this, a large part of the waste falls into a well-known waste off-take trough which is in a well-known manner located in the upper part of the inner space of the drum 1 of the drum filter. After the turning movement of the drum, into the filtering process enter the non-deposited filter cloths, and the filtering process goes on with the original or only slightly decreased intensity.
The turning moYement is imparted to the drum 1 by a command given by a well-known not shown control unit to a well-known not shown driYe de~ice. The control unit receives signals coming from the force recorder 7 recording the mass (weight) of the drum 1 of the drum filter. The changes in the mass of the drum 1 of the drum filter due both to the deposi-tion of the filter cloths and to the rising level of the soiled liquid inside the drum 1 of the drum ilter are ev~luated by the control unit which gives out a signal for turning the drum 1 when preset vslues ha~e been reached. In the same manner is watched also the ma~imum level of so~led liquid in the drum 1 of the drum filter corresponding to the complete obstruction of filter cloths of the drum 1 of the drum filter, and at which ~he control unit sends out a signal for pu~ting the drum filter out of opera-tion and for e~changing the filter cloths.
~ W0~4/03790 2 1 ~ o 7 7 ~ PCTICZ93/00019 The monitoring of the increase in the total mass of the drum 1 of the drum ilter permits to check the changes in the amount of waste deposited -~
on the filter cloths of the drum 1 and thus to control .
the sction of the drum filter.
~ , ~
, .
`:
column having a recording float on the liquid surface, thus removing the faults due to the liquid undulation in the cont~irler. The other a~ove menti.o~ Ir~wl~.~ck.~
discussed with respect to the preceding cases apply to :
this case as well. ~-Disclosure of the Invention The above specified drawbacks are removed by a method of determining the amount of waste deposited on filter cloths of the drum of a drum filter rotatab-ly suspended on a shaft whose principle consists in that there are recorded the changes in the total mass (weight) of the drum of the drum filter which correspond to the changes in the amount of waste deposited on filter cloths and to the changes in -the height of the level of soiled liquid inside the :.
drum of the drum filter.
The device for carrying out the method according to the invention comprises a drum rotatably suspended on at least two suspension-type supporting membe~s embracing a shaft seated on the stationary frame of the drum filter, and its principle consists in that at least one force recorder is provided for between the shaft and the stationary frame of the drum filter.
~ 0 .. .. . i . . .. . .
21~776 ~ W094/0379~ PCT/CZ~3100019 In a preferred embodiment, the force recorder is sea~ed under the shaft at the place where the shaft is embraced by the support~ng member.
The shat can be mounted on a le~er swingingly seated on the stationar~ frame o the drum filter, the force recorder being se~ted between the free arm of the lever and the stationary frame of the drum filter.
The advantage of the method according to the invention consists in the accuracy of determining the le~el height difference inside and outside the drum of the drum filter and, in particular, high reliability regardless of the amount of waste deposit--ed on the feelers. The ad~antage of the device accor~-ing to the in~ention consists in its simple design due to its location outside the i~ner space of the drum.
' Brief DescriPtion of_the_Drawin8 An e~ample of embodiment of a device for carrying out the method according ~o the invention is schemati-cally represented in the accompanying drawing showing thejface of the drum of the drum filter.
Modes for Carrylng Out the Invention Drum filters are use~ for filtering soiled liquids, in particular water. The drum filter comprises a drum 1 consisting in a well-known manner of two faces with horizontal a~is interconnected by not shown reinforcing me~bers, with not shown filter cloths mounted along the circumference W~94/03790 P~T/C~93/~0~19 of the drum. The fil~er cloths are mounted in a known manner which is not the sub~ect of this Patent Appli-cation.
The lower part of the drum 1 of the drum filter is immersed in the (readg-~filtered liquid. The soiled li~uid is in a well-known manner led into the -inner space of the drum 1 of the drum filter, and its level height is superior to the le~el height of the (ready)-filtered liquid. The le~el height difference provides -for the hydrostatic pressure responsible for the fil~ering -process going on.
The drum 1 of the drum filter is rotatably mounted on suspension-type supporting members 2 em-bracin~ a shaft 4, in the shown e~ample of embodiment a roller 3 mounted on the shaft 4. In the shown e~àm-ple of embodiment, the shaft 4 i~ rotatably seated in the body of a single-arm leYer 5 swingingly mounted on a stationary frame 6 of the drum filter. Between the arm end of thè single-arm lever 5 and the stationar~ frame 6 is situated a force recorder 7 at a d~stance from th`e fulcrum of the single-arm le~er 5 greater than the shaft 4. In the shown example of embodiment, the suspension-type supporting members 2 are two in number and they embrace the circumference ~ , , .
of the drum 1 of the drum filter. However, the number of the suspension-type supporting member~ can be more than two. The terminal (outward) suspension-t~pe members 2 can embrace well-known not represented supporting rings fixed to the faces of the drum 1 of the drum filter. At least one of the suspension-type ~upporting members 2 is coupled with a not shown well-known driving device controlled by a not shown well-known control unit which is by means of a not , j 21 ~ 0 7 7 6 PCT/CZg3/00019 shown line connected with the force recorder 7.
In another embodiment, the single-arm le~er 5 can be replaced b~ a double-arm lever.
On the stationary frame 6 of the drum filter is rotatably mounted a stabilizing roller 8 touching the circumference of the drum 1 of the drum filter and stabilizing its position during the rotation of the drum l, in particular in its initial and final phases of rotation, i.e., in the s~art and stop-motiQn phases in which impacts occur. More than one piece of the stsbilizing roiler 8 can be used.
The suspens~on-type supporting members 2 can embraee the shaft 4 directly, with no rollers 3 inter-po:8ed ~betweèn them, and the force recorders 7 may h~: ba in other embodiments located~between the shaft 4 and the stationary frame 6 of the drum filter, at leas~ one force recorder 7 of any known type being obligatory for each drum 1. ~lso, the shaft 4 can be suspended on the force recorder 7 at due place.
In :the shown e~ample of embodiment, the shaft ~: 4 is made as a through shaft throughout the length , , o~i the drum 1. However, it can also be made as a diYided shaft seated in a well-known way on the stati-: onary frame 6 of the drum 1 of the drum filtèr.
Soiled liquid led into the inner space of the drum 1 of the drum f~lter passes during the filtering proce~s through the filtering cloths arran8ed on the circumference of the drum 1 and on which deposits the waste while the (ready-)filtered liquid is col-lected in the space outside the drum 1 and is in ~' r ~ ` ~
W094/03790 2 1 4 0 7 7 6 PCT/C~93/00019 a well-known manner led away from there. The hydrostatic pressure due to ~he level height difference inside and outside the drum 1 keeps the filtering process going on. The waste continuously depositing on the filter cloths impairs their permea-bility for the liquid, and the leYel inside the drum 1 rises. When the amount of the waste deposi~ed on the filter ~loths is excessive, it is necessary to turn the drum 1 a bit; at this, a large part of the waste falls into a well-known waste off-take trough which is in a well-known manner located in the upper part of the inner space of the drum 1 of the drum filter. After the turning movement of the drum, into the filtering process enter the non-deposited filter cloths, and the filtering process goes on with the original or only slightly decreased intensity.
The turning moYement is imparted to the drum 1 by a command given by a well-known not shown control unit to a well-known not shown driYe de~ice. The control unit receives signals coming from the force recorder 7 recording the mass (weight) of the drum 1 of the drum filter. The changes in the mass of the drum 1 of the drum filter due both to the deposi-tion of the filter cloths and to the rising level of the soiled liquid inside the drum 1 of the drum ilter are ev~luated by the control unit which gives out a signal for turning the drum 1 when preset vslues ha~e been reached. In the same manner is watched also the ma~imum level of so~led liquid in the drum 1 of the drum filter corresponding to the complete obstruction of filter cloths of the drum 1 of the drum filter, and at which ~he control unit sends out a signal for pu~ting the drum filter out of opera-tion and for e~changing the filter cloths.
~ W0~4/03790 2 1 ~ o 7 7 ~ PCTICZ93/00019 The monitoring of the increase in the total mass of the drum 1 of the drum ilter permits to check the changes in the amount of waste deposited -~
on the filter cloths of the drum 1 and thus to control .
the sction of the drum filter.
~ , ~
, .
`:
Claims (4)
1. A method of determining the amount of waste deposited on filter cloths on the shaft of a rotatably suspended drum of a drum filter in which soiled liquid is inside the drum whose lower part is immersed in the filtered liquid, and the level of the soiled liquid inside the drum is higher than the level of the filter-ed liquid outside said drum, characterized by that there are recorded the changes in the total mass (weight) of the drum of the drum filter which corres-pond to the changes in the amount of waste deposited on filter cloths and to the changes of the level of soiled liquid inside the drum (1) of the drum filter.
2. A device for carrying out the method as claimed in Claim 1, comprising a drum of a drum filter rotatably mounted on at least two suspension-type supporting members embracing a shaft seated on the stationary frame of the drum filter, with soiled liquid situated inside the drum, the lower part of the drum immersed in the filtered liquid, and the level of the soiled liquid inside the drum of the drum filter higher than the level of the filtered liquid outside said drum, characterized by that at least one force recorder (7) is provided for between the shaft (4) and the stationary frame (6).
3. A device as claimed in Claim 2, characterized by that the force recorder (7) is seated under the shaft (4) at the place where the shaft (4) is embraced by the supporting member (2).
4.A device as claimed in Claim 2, characterized by that the shaft (4) is mounted on a lever (5) swing-ingly seated on the stationary frame (6) of a drum filter, and that the force recorder (7) is seated between the arm of the lever (5) and the stationary frame (6).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS922404A CZ278533B6 (en) | 1992-08-03 | 1992-08-03 | Device for determining of a drum filter filter cloth clogging degree |
| CZPV2404-92 | 1992-08-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2140776A1 true CA2140776A1 (en) | 1994-02-17 |
Family
ID=5361106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2140776 Abandoned CA2140776A1 (en) | 1992-08-03 | 1993-08-02 | A method of determining the amount of waste deposited on filter cloths of a drum filter and a device for carrying out the method |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0653055A1 (en) |
| AU (1) | AU4557193A (en) |
| CA (1) | CA2140776A1 (en) |
| CZ (1) | CZ278533B6 (en) |
| FI (1) | FI950470A0 (en) |
| HU (1) | HU214000B (en) |
| PL (1) | PL307240A1 (en) |
| SK (1) | SK278280B6 (en) |
| WO (1) | WO1994003790A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162176A (en) * | 2018-07-12 | 2019-01-08 | 俞金朋 | A kind of device being laid with bridge for ground |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5928978A (en) * | 1997-07-10 | 1999-07-27 | Dow Corning Corporation | Continuous method of producing silicon carbide fibers |
| CN103071332B (en) * | 2012-12-31 | 2015-01-28 | 杭州兴源过滤科技股份有限公司 | Filtering cloth water-flushing sling detection device for press filter and detection method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3837216A (en) * | 1973-04-30 | 1974-09-24 | Shinohara Seiki Kk | Method and apparatus for measuring the concentration of solid contaminants contained in liquids |
| DE3525951A1 (en) * | 1985-07-18 | 1987-01-29 | Gast Theodor | Device for the gravimetric determination of mass |
| US5095740A (en) * | 1987-12-31 | 1992-03-17 | Diagnetics, Inc. | System for monitoring and analyzing solid contaminents in fluids |
-
1992
- 1992-08-03 SK SK240492A patent/SK278280B6/en unknown
- 1992-08-03 CZ CS922404A patent/CZ278533B6/en unknown
-
1993
- 1993-08-02 EP EP93915636A patent/EP0653055A1/en not_active Withdrawn
- 1993-08-02 HU HU9500338A patent/HU214000B/en not_active IP Right Cessation
- 1993-08-02 CA CA 2140776 patent/CA2140776A1/en not_active Abandoned
- 1993-08-02 WO PCT/CZ1993/000019 patent/WO1994003790A1/en not_active Application Discontinuation
- 1993-08-02 AU AU45571/93A patent/AU4557193A/en not_active Abandoned
- 1993-08-02 PL PL93307240A patent/PL307240A1/en unknown
-
1995
- 1995-02-02 FI FI950470A patent/FI950470A0/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162176A (en) * | 2018-07-12 | 2019-01-08 | 俞金朋 | A kind of device being laid with bridge for ground |
| CN109162176B (en) * | 2018-07-12 | 2020-11-20 | 福州宇卓科技有限公司 | Device for rock-soil laying road bridge |
Also Published As
| Publication number | Publication date |
|---|---|
| HU214000B (en) | 1997-11-28 |
| FI950470A (en) | 1995-02-02 |
| SK240492A3 (en) | 1996-07-03 |
| FI950470A0 (en) | 1995-02-02 |
| PL307240A1 (en) | 1995-05-15 |
| AU4557193A (en) | 1994-03-03 |
| SK278280B6 (en) | 1996-07-03 |
| WO1994003790A1 (en) | 1994-02-17 |
| HU9500338D0 (en) | 1995-03-28 |
| CZ240492A3 (en) | 1994-02-16 |
| HUT70015A (en) | 1995-09-28 |
| EP0653055A1 (en) | 1995-05-17 |
| CZ278533B6 (en) | 1994-02-16 |
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