DK167321B1 - VIBRATOR FOR COMPRESSING EARTH - Google Patents
VIBRATOR FOR COMPRESSING EARTH Download PDFInfo
- Publication number
- DK167321B1 DK167321B1 DK637088A DK637088A DK167321B1 DK 167321 B1 DK167321 B1 DK 167321B1 DK 637088 A DK637088 A DK 637088A DK 637088 A DK637088 A DK 637088A DK 167321 B1 DK167321 B1 DK 167321B1
- Authority
- DK
- Denmark
- Prior art keywords
- vibrator
- dampers
- excavator
- unit
- gable
- Prior art date
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
- E01C19/30—Tamping or vibrating apparatus other than rollers ; Devices for ramming individual paving elements
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Architecture (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Road Paving Machines (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Shovels (AREA)
- Soil Working Implements (AREA)
Description
i DK 167321 B1in DK 167321 B1
Den foreliggende opfindelse angår en jordkomprimerings- og planeringsvibrator med hydraulisk drift og beregnet til at blive monteret fx. på en gravemaskine.The present invention relates to a soil compaction and leveling vibrator with hydraulic operation and intended to be mounted e.g. on an excavator.
Jordstampevibratorer er kendt og kan fx. anvendes tilkoblet grave-5 maskiner eller andre maskiner. De kendte vibratorer er således udformet, at de har en vibratorindretning, fx. med en eller flere excenterskiver og er beregnet til at bæres af gravemaskinen eller fx. af en kran, hvis vibratoren skal sænkes ned i en udgravning.Grounding vibrators are known and may e.g. used on engraved-5 machines or other machines. The known vibrators are designed to have a vibrator device, e.g. with one or more eccentric discs and is intended to be carried by the excavator or e.g. of a crane if the vibrator is to be lowered into an excavation.
Vibratorerne kan være hydraulisk drevet eller drevet af diesel-10 eller benzinmotorer. Diesel- eller benzindrevne vibratorer har imidlertid ulemper, som allerede starter på jordoverfladen og som derpå øges med den dybde under overfladen, der skal arbejdes på, nemlig, at disse maskiner, der oftest er håndstyrede og selvkørende, afgiver udstødsgas, som fylder den udgravning, de kører i, hvilket udgør dels en hel bredsri -15 siko for operatøren, og desuden, at de er tunge og derfor må sænkes ned i udgravningen eller i hvert fald må løftes op af en kran eller alternativt af en gravemaskine.The vibrators may be hydraulically driven or powered by diesel-10 or gasoline engines. However, diesel or gasoline-powered vibrators have drawbacks that already start on the ground surface and then increase with the depth below the surface to be worked on, namely that these machines, which are usually hand-operated and self-propelled, emit exhaust gas that fills the excavation, they drive in, which is partly a whole wide risk to the operator, and in addition that they are heavy and must therefore be lowered into the excavation or at least lifted by a crane or alternatively by an excavator.
Et eksempel på en jordvibrator af konventionel type kendes fra canadisk patentskrift nr. 1.005.663, hvor et stativ, der tjener til at 20 hænges op på en gravemaskinearm, indeholder en excentrikenhed, der er indrettet til at drives af gravemaskinens hydrauliske system, idet stativet også er forbundet med en jordstampeplade gennem fire elastiske vibrationsdæmpere, som sidder i hvert sit hjørne af stativet. Disse dæmpere forbinder stativet med jordvibratorens stampeplade og er monteret med 25 deres symmetriakser i gravemaskinens tværretning. Dæmpernes svageste retning, når de belastes, bliver herved den samme retning som den, hvori gravemaskinens kraftpåvirkninger bliver størst, dvs. i gravemaskinens længderetning, hvilket er meget uheldigt. I almindelighed gælder det, at dæmperne skal være monteret i et bestemt forhold til den vibratorenhed, 30 der vælges. I det canadiske tilfælde er der tale om en vibratorenhed u-den retningsbestemt centrifugalkraft, dvs. vibratorenheden har lige store centrifugal kræfter under hele excentrikkens rotation venstre om eller højre om. Det ville være bedre, hvis centrifugalkraften var større i en bestemt retning (arbejdsretningen) og mindre i en anden retning (den 35 stik modsatte).An example of a conventional type earth vibrator is known from Canadian Patent Specification No. 1,005,663, wherein a rack serving to be suspended on an excavator arm contains an eccentric unit adapted to be driven by the excavator hydraulic system, the rack is also connected to a grounding plate through four elastic vibration dampers, which are located in each corner of the rack. These dampers connect the stand to the ground vibrator stamping plate and are mounted with their axes of symmetry in the excavator's transverse direction. The weakest direction of the dampers, when loaded, thereby becomes the same direction as the one in which the excavator's force effects are greatest, ie. in the longitudinal direction of the excavator, which is very unfortunate. In general, the dampers must be mounted in a specific ratio to the vibrator unit 30 selected. In the Canadian case, it is a vibrator unit without directional centrifugal force, ie. the vibrator unit has equal centrifugal forces throughout the rotation of the eccentric left or right. It would be better if the centrifugal force were greater in one direction (the working direction) and less in another direction (the 35 opposite).
EP-patentansøgning nr. 0 220 373 anviser en gravemaskine-manøvreret jordvibrator, hvis bundflade 16 påvirkes af retningsbestemte vibrationer. Bundfladen er tilsluttet åget 65 gennem vibrationsdæmpere, som DK 167321 B1 2 dog også her er monteret med deres symmetriakser i gravemaskinens tværretning.European Patent Application No. 0 220 373 discloses an excavator-maneuvered earth vibrator whose bottom surface 16 is affected by directional vibrations. The bottom surface is connected to the yoke 65 through vibration dampers, which DK 167321 B1 2 is also mounted here with their axes of symmetry in the excavator's transverse direction.
Nærværende opfindelse har til formål at tilvejebringe en jordkomprimerende og planerende vibrator, der ikke har de ovenfor nævnte ulem-5 per, ved at anvise en jordvibrator med vibrationsdæmpere, der er monteret på en sådan måde, at dæmpernes stærkeste retning bliver den samme som den, hvor gravemaskinens kraftpåvirkninger er størst. Dette kan opnås ved, at vibrationsdæmperne på kendt måde monteres i fire hjørner mellem stativet og vibrationspladen, idet denne montering ifølge opfin-10 del sen sker med vibrationsdæmpernes symmetriakser i gravemaskinearmens og vibratorenhedens længderetning. Endvidere omfatter vibratoren ifølge opfindelsen to ved hver sin modsatte ende af vibratorpladen opad rettede gavlplader, som tjener til at muliggøre planering af udenom vibratoren værende jordmasser m.m.The present invention has for its object to provide an earth compressing and leveling vibrator which does not have the disadvantages mentioned above by providing an earth vibrator with vibration dampers mounted in such a way that the strongest direction of the dampers becomes the same as where the excavator's power effects are greatest. This can be achieved by mounting the vibration dampers in known manner in four corners between the frame and the vibration plate, this installation according to the invention being done with the axes of vibration dampers in the longitudinal direction of the excavator arm and the vibrator unit. Furthermore, the vibrator according to the invention comprises two end plates facing each other at the opposite end of the vibrator plate, which serve to enable the soil masses to be arranged outside the vibrator.
15 For at jordkomprimerings- og planeringsvibratoren vil arbejde bedst med monteringen ifølge opfindelsen, bør vibratorenheden have to excentrikker, som på i og for sig kendt måde er anbragt på linie med hinanden, hvorved denne linie ifølge opfindelsen ligger på skrå i forhold til vibrationspladens længde- og tværretning (diagonalmontering på 20 vibrationspladen). Disse dobbelte excentrikker er med fordel indbygget i et aflangt hus. Herved opnås dels en begrænset størrelse af jordkomprimeringspladen, så det ønskede høje tryk pr. fladeenhed kan opretholdes, og dels god beskyttelse af vibratorenheden med tilhørende hydrauliske rørslanger og koblinger. Desuden opnås, takket være de ovenfor nævnte 25 opadrettede gavl pi ader, at man kan modtage løs jord fra sidevæggene med gavlene, og planere disse masser med selve vibrationspladen som værktøj inden komprimering påbegyndes.In order for the soil compaction and leveling vibrator to work best with the assembly according to the invention, the vibrator unit should have two eccentrics aligned in a manner known per se, this line of the invention being inclined with respect to the length of the vibrating plate. and transverse direction (diagonal mounting on the vibration plate). These double eccentrics are advantageously built into an elongated housing. This results in a limited size of the soil compaction plate, so that the desired high pressure per surface unit can be maintained and partly good protection of the vibrator unit with associated hydraulic pipe hoses and couplings. In addition, thanks to the above-mentioned 25 gable pads, loose soil can be obtained from the side walls with the gables, and plan these masses with the vibration plate itself as a tool before commencement of compression.
Overdelen er ved sine fastgørelsessteder til dæmperne forlænget nedefter, og delens nederste ender fungerer som stopflader, der ligger 30 an mod bundpladen og herved aflaster dæmperne på et passende niveau.The upper part, at its attachment points to the dampers, is extended downwards, and the lower ends of the part act as stop surfaces which abut against the base plate, thereby relieving the dampers at an appropriate level.
Nærmere bestemt omfatter den angivne jordkomprimerings- og planeringsvibrator ifølge opfindelsen en langstrakt overdel, der er udformet som et åg med fastgørelse for en løftearm som fx. på en gravemaskine, hvilken arm under løft strækker sig i overdelens og vibratorens længde-35 retning, og hvor underdelen omfatter en bundplade og en hydraulmotordrevet vibratorenhed med to excentrikker og retningsbestemt centrifugalkraft, idet vibrationsdæmpere, fx. af gummi, er placerede mellem overdelen og underdelen. Vibratoren er ejendommelig ved, at bundpladen har DK 167321 B1 3 gavlplader i det mindste fortil og bagtil, som gør det muligt at anvende vibratoren som et af gravemaskinen manøvreret jordflytningsredskab, og at vibrationsdæmperne er anbragt mellem indersiderne af gavl pladerne og det med gravemaskinearmen forbundne åg og er således anbragt, at de gi-5 ver bundpladen frihed til at bevæge sig i forhold til åget, især lodret op og ned.Specifically, the aforementioned soil compaction and leveling vibrator according to the invention comprises an elongated upper member formed as a yoke with attachment for a lifting arm such as, for example. on an excavator, the arm extending during lifting in the longitudinal direction of the upper and vibrator, and wherein the lower part comprises a bottom plate and a two-eccentric hydraulic motor vibrator unit and directional centrifugal force, with vibration dampers, e.g. of rubber, are placed between the top and bottom. The vibrator is peculiar in that the base plate has DK 167321 B1 3 end plates at least front and rear, which allow the vibrator to be used as an earth moving tool and that the vibration dampers are placed between the inside of the end plates and the arm of the excavator arm. and are arranged so as to give the base plate freedom to move relative to the yoke, especially vertically up and down.
En ulempe ved kendte vibratorenheder er det, at man på disse har maskinens mest følsomme punkt for skader, nemlig koblingstilslutningerne for hydraulmotoren, enten længst ude på venstre eller højre side i den 10 normale køreretning, hvorved sidevægge og andre forhindringer let forårsager skader. I nærværende tilfælde er motoren derimod vendt således, at til trods for, at dens tilslutninger er let tilgængelige, så er de velbeskyttede bag gavl pladerne og under overdelen i den normalt frie køreretning.A disadvantage of known vibrator units is that these have the most sensitive point of the machine for damage, namely the coupling connections for the hydraulic motor, either at the far left or right side in the normal driving direction, whereby side walls and other obstacles easily cause damage. In the present case, on the other hand, the engine is turned so that, although its connections are readily accessible, the well-protected rear end plates and the upper part are in the normally free direction of travel.
15 Opfindelsen skal i det følgende forklares detaljeret under henvis ning til tegningen, hvor fig. 1 viser et sidebillede af en jordkomprimerings- og planeringsvibrator ifølge opfindelsen, fig. 2 viser et billede oppefra af vibratoren i fig. 1, og 20 fig. 3 viser et delvist gennemskåret billede af vibratoren i fig.The invention will now be explained in detail with reference to the drawings, in which: 1 is a side view of a soil compacting and leveling vibrator according to the invention; FIG. 2 is a top view of the vibrator of FIG. 1, and FIG. 3 is a partially cut-away view of the vibrator of FIG.
1 set fra den ene ende.1 seen from one end.
Samme henvisningsbetegnelser anvendes i de forskellige figurer, hvor dette har været muligt.The same reference numerals are used in the various figures where this has been possible.
Monteringen af de respektive dæmpere og af vibratorenhedens excen-25 trikenhed samt sidstnævntes vibrationseffekt har stor betydning. Vibrationseffekten skal være rettet i lodret retning, således at man får det stærkeste vibratortryk nedad respektive opad. For at opnå dette resultat bør excentrikenheden bedst udformes med to excenterskiver, som roterer synkront på en sådan måde, at de med deres excentrikker i opad- respek-30 tive nedadrettede positioner tilsammen giver den største kraft, idet de respektive excentrikker ophæver hinandens kræfter, når de vender mod hinanden respektive bort fra hinanden i horisontal stilling.The mounting of the respective dampers and of the eccentric unit of the vibrator unit as well as the vibration effect of the latter is of great importance. The vibration effect must be directed in the vertical direction, so that the strongest vibrator pressure is downwards and upwards respectively. To achieve this result, the eccentric unit should best be formed with two eccentric discs which rotate synchronously in such a way that, together with their eccentrics in upward and downward positions, they together provide the greatest force, the respective eccentrics abolishing each other's forces when they face each other or away from each other in a horizontal position.
Som det er nævnt ovenfor er jordkomprimerings- og planeringsvibratoren ifølge opfindelsen afbildet set fra siden i fig. 1, oppefra i fig.As mentioned above, the soil compaction and leveling vibrator of the invention is depicted from the side in FIG. 1, top view of FIG.
35 2 og fra enden i fig. 3.35 and from the end of FIG. Third
Henvisningsbetegnelsen 1 refererer til en overdel til fastgørelse af fx. en gravemaskinearm samt nedadrettede bæreplader 1', 2 refererer til fire vibrationsdæmpere, 3 er en bundplade, 4 er et stop for overde- DK 167321 B1 4 len mod bundpladen og har til opgave at begrænse påvirkninger oppefra, 5 er en gavlplade, som udgør bundpladens fastgørelse til vibrationsdæmperen samt modhold mod jord ved planeringsarbejde, 6 er en diagonalt placeret vibratorenhed med dobbelte excenterskiver og retningsbestemt cen-5 trifugalkraft, 7 er en hydraulmotor, 8 er en tryk-, strømretnings- og kontraventilenhed, 9 er en yderligere hydraulmotorplacering ved en vibrator med større effekt, og 10 viser hydraulrørsi anger.The reference numeral 1 refers to a top for attaching e.g. an excavator arm and downwardly supported support plates 1 ', 2 refer to four vibration dampers, 3 is a base plate, 4 is a stop for the upper plate and the task is to limit the influences from above, 5 is a gable plate which constitutes the base plate attachment to the vibration damper and earth resistance during planning work, 6 is a diagonally located vibrator unit with double eccentric discs and directional centrifugal force, 7 is a hydraulic motor, 8 is a pressure, directional and check valve assembly, 9 is an additional hydraulic motor location by a vibrator with greater power, and 10 shows hydraulic tube remorse.
Den i figurerne 1-3 viste udformning giver betydelige fordele. Således kan man ved at anvende vibratorenheden 6 med retningsbestemt cen-10 trifugalkraft uden nogen som helst reduktion af dennes egenskaber montere denne på bundpladen i en hvilken som helst vinkel i forhold til vibrationsdæmperen, hvorved den særlige diagonalmontering i kombination med den øvrige konstruktion medfører flere væsentlige fordele, blandt hvilke skal nævnes, at hydraul motoren 7 med tilslutninger sidder velbe-15 skyttet uanset, hvilken af maskinens fire sider som bliver udsat for påvirkninger, og at rørslangerne fra motoren til tryk-, strømnings- og kontraventil enheden 8 sidder velbeskyttet under overdelen med tilslutning på vibratorens ene side. Om rørslangerne behøver at tilsluttes fra den modsatte side, vendes vibratorpladen en halv omdrejning. I tryk-, 20 strømnings- og kontraventil enheden har trykdelen til opgave at beskytte hydraulmotoren ved tilslutning til maskiner med høje tilslutningstryk, mens strømningsdelen regulerer strømmen til vibratoren, således at den får en rigtigt afpasset oliemængde uafhængigt af gravemaskinens arbejds-kapacitet. I et vibrationssystem med store svingmasser skal der være en 25 kontraventil for at forhindre returtryk i hydraulmotoren, når vibratoren slås fra.The design shown in Figures 1-3 provides significant advantages. Thus, by using the vibrator unit 6 with directional centrifugal force, without any reduction of its properties, it can be mounted on the base plate at any angle with respect to the vibration damper, whereby the particular diagonal mounting in combination with the other construction causes several significant Advantages of which are to mention that the hydraulic motor 7 with connections is well protected regardless of which of the four sides of the machine is subjected to stresses and that the pipe hoses from the motor to the pressure, flow and check valve unit 8 are well protected under the upper part with connection on one side of the vibrator. If the pipe hoses need to be connected from the opposite side, the vibrator plate is turned half a turn. In the pressure, flow and non-return valve unit, the pressure part is designed to protect the hydraulic motor when connected to machines with high connection pressure, while the flow part regulates the flow to the vibrator so that it receives a properly adjusted oil quantity independent of the excavator's working capacity. In a vibration system with large swing masses, there must be a non-return valve to prevent return pressure in the hydraulic motor when the vibrator is switched off.
Det er uden betydning, hvilken side der vender fremefter eller bagud i gravemaskinens retning. Endvidere betyder di agonalmonteringen en fordelagtig afstivning af bundpladen. Hvis man vil øge effekten kan man 30 ganske enkelt montere yderligere en motor diagonalt på vibratorenheden, idet det samme beskyttede område er frit. Denne motor er eksempelvis vist ved 9.It does not matter which side is facing forward or backward in the direction of the excavator. Furthermore, the di agonal assembly means an advantageous stiffening of the base plate. To increase the power, one can simply mount another motor diagonally on the vibrator unit, the same protected area being free. For example, this engine is shown at 9.
For at opnå en væsentligt højere effekt på vibratoren end beskrevet ovenfor kan man tænke sig at montere yderligere dæmpere i 90 graders 35 vinkel i forhold til de øvrige og fastgjort på tilsvarende måde som gavl pladerne, hvilket yderligere øger planeringsegenskaberne, når det gælder fyldmasserne. En sådan vibrator kan monteres på gravemaskiner med betydelige svingkræfter.To achieve a significantly higher effect on the vibrator than described above, it is conceivable to mount additional dampers at a 90 degree angle with respect to the others and attached in a similar manner to the gable plates, which further enhances the leveling properties of the fillers. Such a vibrator can be mounted on excavators with significant oscillating forces.
DK 167321 B1 5DK 167321 B1 5
Endvidere kan en monterbar og demonterbar sideplade 11 (fig. 2) være fastgjort på den ene eller begge sider af vibratorenheden til gavlpladernes ender og udgøre modhold mod jordmasser under planering i sideretningen og/eller virke som stop for overdelens bevægelse i sideretnin-5 gen for derved at begrænse belastningen på dæmperne, hvis vibratoren monteres på en unormalt stor gravemaskine og dermed kan antages at blive udsat for betydelige svingkræfter.Furthermore, a mountable and removable side plate 11 (Fig. 2) may be attached to one or both sides of the vibrator unit to the ends of the gable plates and act as a resistance to soil masses during lateral planning and / or act as a stop for the upper movement of the lateral direction for thereby limiting the load on the dampers if the vibrator is mounted on an abnormally large excavator and can thus be assumed to be subjected to considerable oscillatory forces.
Det skal fremhæves, at jordkomprimerings- og planeringsvibratoren ifølge opfindelsen ikke nødvendigvis skal anvendes sammen med en grave-10 maskine, men at den kan anvendes med en hvilken som helst indretning, som evner at løfte vibratoren og som kan forsyne den med hydraulisk tryk og væske.It should be noted that the soil compacting and leveling vibrator of the invention is not necessarily used with an excavator but can be used with any device capable of lifting the vibrator and capable of providing it with hydraulic pressure and fluid. .
En fordelagtig egenskab ved di agonal monteringen af vibratorenheden opnås derved, at ved flytning af materiale i sideretningen uden sidepia-15 der kan materiale, som vil forblive tilbage oven på bundpladen, let fjernes med en vippende bevægelse.An advantageous feature of the diagonal mounting of the vibrator assembly is achieved by the fact that, when moving material in the lateral direction without side panels, material which will remain on top of the base plate can be easily removed with a tilting motion.
Endvidere skal fremhæves, at ved at gavl pladerne er udført ud i et stykke med den vibrerende bundplade, fås en vibrerende effekt ved gavlpladerne, hvorved jordmasser lettere kan flyttes.Furthermore, it should be emphasized that by having the gable plates made in one piece with the vibrating base plate, a vibrating effect is obtained by the gable plates, whereby soil masses can be moved more easily.
Claims (3)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8704496 | 1987-11-16 | ||
| SE8704496A SE463216B (en) | 1987-11-16 | 1987-11-16 | SOIL PACKAGING AND EQUIPMENT Vibrator |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK637088D0 DK637088D0 (en) | 1988-11-15 |
| DK637088A DK637088A (en) | 1989-05-17 |
| DK167321B1 true DK167321B1 (en) | 1993-10-11 |
Family
ID=20370248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK637088A DK167321B1 (en) | 1987-11-16 | 1988-11-15 | VIBRATOR FOR COMPRESSING EARTH |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPH01263311A (en) |
| AU (1) | AU615007B2 (en) |
| DK (1) | DK167321B1 (en) |
| FI (1) | FI90577C (en) |
| NO (1) | NO172657C (en) |
| SE (1) | SE463216B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0399010U (en) * | 1990-01-22 | 1991-10-16 | ||
| SE466164B (en) * | 1990-05-02 | 1992-01-07 | Lars Andreasson | Soil compaction VIBRATOR |
| AU646570B2 (en) * | 1991-06-05 | 1994-02-24 | Ian Frederick Burke | Vibrator |
| CN110356032A (en) * | 2019-07-18 | 2019-10-22 | 贵州师范大学 | One kind being used for Karst region ensiling press device and its application method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3229317C2 (en) * | 1982-01-13 | 1985-03-21 | Rilco Maschinenfabrik Gmbh & Co Kg, 7401 Dusslingen | Automotive compactor |
| EP0220373B2 (en) * | 1985-10-29 | 1994-12-14 | Hitachi Construction Machinery Co., Ltd. | Vibratory compaction working machine |
-
1987
- 1987-11-16 SE SE8704496A patent/SE463216B/en not_active IP Right Cessation
-
1988
- 1988-11-15 FI FI885286A patent/FI90577C/en not_active IP Right Cessation
- 1988-11-15 NO NO885094A patent/NO172657C/en unknown
- 1988-11-15 DK DK637088A patent/DK167321B1/en not_active IP Right Cessation
- 1988-11-16 AU AU25176/88A patent/AU615007B2/en not_active Ceased
- 1988-11-16 JP JP63287860A patent/JPH01263311A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FI885286A0 (en) | 1988-11-15 |
| DK637088D0 (en) | 1988-11-15 |
| DK637088A (en) | 1989-05-17 |
| SE463216B (en) | 1990-10-22 |
| NO885094L (en) | 1989-05-18 |
| NO172657C (en) | 1993-08-18 |
| SE8704496L (en) | 1989-05-17 |
| AU615007B2 (en) | 1991-09-19 |
| FI90577B (en) | 1993-11-15 |
| FI885286A (en) | 1989-05-17 |
| FI90577C (en) | 1994-02-25 |
| NO172657B (en) | 1993-05-10 |
| JPH01263311A (en) | 1989-10-19 |
| SE8704496D0 (en) | 1987-11-16 |
| AU2517688A (en) | 1989-05-18 |
| NO885094D0 (en) | 1988-11-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| B1 | Patent granted (law 1993) | ||
| PBP | Patent lapsed |