DK147441B - RAIL GRINDING DEVICE - Google Patents
RAIL GRINDING DEVICE Download PDFInfo
- Publication number
- DK147441B DK147441B DK399471AA DK399471A DK147441B DK 147441 B DK147441 B DK 147441B DK 399471A A DK399471A A DK 399471AA DK 399471 A DK399471 A DK 399471A DK 147441 B DK147441 B DK 147441B
- Authority
- DK
- Denmark
- Prior art keywords
- frame
- rail
- abrasive
- abrasive discs
- grinding
- Prior art date
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B31/00—Working rails, sleepers, baseplates, or the like, in or on the line; Machines, tools, or auxiliary devices specially designed therefor
- E01B31/02—Working rail or other metal track components on the spot
- E01B31/12—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails
- E01B31/17—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails by grinding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Machines For Laying And Maintaining Railways (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Road Paving Structures (AREA)
- Traffic Control Systems (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Description
147441147441
Sen foreliggende opfindelse angår et skinneslibningsapparat af den i krav l's indledning angivne art,The present invention relates to a rail grinding apparatus of the kind set forth in the preamble of claim 1,
Sa jernbaneskinner er udsat for vedvarende slid,forbliver de ikke retlinede, men vil efter kortere eller længere tids brug udvise langsgående ujævnheder i bølgeform. Se enkelte bølgeformede ujævnheder kan have varierende længde. Ujævnhederne forsøges fjernet ved slibning, men især bølger med længder af størrelsesordenen -én meter eller mere medfører særlige vanskeligheder.Said rail rails are subject to sustained wear and tear, they do not remain rectilinear, but will, after shorter or longer use, exhibit longitudinal irregularities in waveform. See single corrugated irregularities may vary in length. The irregularities are attempted by grinding, but in particular waves of lengths of the order of - one meter or more cause special difficulties.
Man har forsøgt at anvende sætvis anbragte drejelige slibeskiver, som har vist sig velegnede til bortslibning af bølgeformede ujævnheder, hvis længde er mindre end slibe-skivernes diametre, hvorimod slibeskiverne i praksis har vist sig at have tendens til at følge mere langstrakte ujævnheders bølgeprofiler·Attempts have been made to use staggered rotatable grinding discs which have proved suitable for grinding corrugated irregularities, the length of which is less than the diameter of the grinding discs, whereas the grinding discs have in practice shown to follow the wave profiles of more elongated irregularities.
Metoden er søgt forbedret ved anvendelse af kompensationsanordninger med foranderlige kompensationsforhold· Det er ved den metode, som kendes fra eksempelvis DE fremlæggelsesskrift nr 15 34 037 muligt at korrigere for op mod 70# af bølgeamplituden, men på grund af optrædende elasticitet i systemet, er en 100# korrektur ikke gennemførlig.The method has been sought to be improved by the use of compensating devices with variable compensation conditions · It is possible to correct for up to 70 # of the wave amplitude by the method known from, for example, DE Publication No. 15 34 037, but due to the elasticity of the system, 100 # proof not feasible.
Forøgelsen af togenes hastigheder kræver imidlertid en bedre korrektur af skinnerne, dels af sikkerhedsmæssige grunde, dels af hensyn til rejsekomforten ved de høje hastigheder.However, the increase in train speeds requires a better correction of the rails, partly for safety reasons and partly for the sake of traveling comfort at the high speeds.
Formålet med opfindelsen er med udgangspunkt i det fra nævnte fremlæggelsesskrift kendte at anvise et slibe-apparat, hvormed en fyldestgørende skinnekorrektur kan udføres.The object of the invention is to provide an abrasive apparatus with which a satisfactory rail correction can be made from the present disclosure.
Dette opnås ifølge opfindelsen ved den i krav 1 angivne konstruktion.This is achieved according to the invention by the construction of claim 1.
Denne konstruktion garanterer den tilstræbte effektivitet af slibeprocessen og hindrer, at slibeskiverne bevæger sig ned i bølgedalene og følger bølgerne i stedet for at frembringe en ny plan skinneoverflade. Dette opnås ved udelukkelse af et kipning fremkaldende, på slibeskiverne og deres bærende ramme virkende moment.This construction guarantees the desired efficiency of the grinding process and prevents the grinding wheels from moving down the wave valleys and following the waves rather than creating a new flat rail surface. This is achieved by the exclusion of a tilting inducer, acting on the abrasive wheels and their supporting frame.
2 1474412 147441
Opfindelsen skal i det følgende forklares nærmere i forbindelse med tegningen, hvor fig. 1 viser en første udførelsesform for et opfindelsesmæssigt apparat set fra siden delvis i snit, fig. 2 samme set forfra og delvis i snit, fig. 3 slibestenenes omdrejningsretninger angivet skematisk, fig. 4 en anden og tredie udførelsesform ifølge opfindelsen, fig. 5 den tredie udførelsesform set forfra delvis i snit, fig. 6 en fjerde udførelsesform set fra siden, fig. 7 samme set ovenfra, og fig. 8, 9 og 10 viser skematisk to forskellige ophæng-ningsmetoder for sliberammen.BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be explained in more detail in connection with the drawing, in which 1 is a partial side elevational view of a first embodiment of an inventive device; FIG. 2 is a front elevation and partly in section; FIG. Fig. 3 shows the direction of rotation of the abrasive stones schematically; 4 shows a second and third embodiment of the invention; FIG. 5 is a partial front elevational view of the third embodiment; FIG. 6 is a side elevational view of a fourth embodiment; FIG. 7 is a top view, and FIG. 8, 9 and 10 schematically show two different suspension methods for the abrasive frame.
Den første udførelsesform (fig. 1-3), som er beregnet til slibning af vandrette skinneplader, bærer i en langstrakt ramme 1 lejringer for fire slibesten 2, 3, 4, 5.The first embodiment (Figs. 1-3), which is intended for grinding horizontal rail plates, carries in an elongated frame 1 bearings for four abrasive stones 2, 3, 4, 5.
Slibestenene ligger i et fælles med rammens 1 længdeakse parallelt plan og befinder sig over skinnen 6. Rammen 1 er førbar i forhold til skinnen.The abrasive stones lie in a joint with the longitudinal axis of the frame 1 parallel to the rail 6. The frame 1 is movable relative to the rail.
føringen er udformet, så rammen 1 kan svinge om en akse gennem to tappe 7 og 8, hvilken akse befinder sig tilnærmelsesvis midt i slibestenenes vandrette arbejdsflade. Tappene 7 og 8 er ved deres frie ender forbundet med to stænger 9 og 10, som er lejret aksialt forskydeligt til bundrammen 11 i den med slibe-apparatet udstyrede skinnevogn. Rammen 1 er som følge af stængernes 9 og 10 frie bevægelighed op og ned i forhold til bundrammen 11 og som følge af taplejerne 7 og 8 frit bevægelig i lodret retning, medens den tvinges med i skinnevognens køreretning.the guide is formed so that the frame 1 can pivot about one axis through two pins 7 and 8, which axis is approximately in the middle of the horizontal working surface of the grinding stones. The pins 7 and 8 are connected at their free ends to two rods 9 and 10 which are mounted axially slidably to the bottom frame 11 of the rail car equipped with the grinding apparatus. As a result of the free movement of the rods 9 and 10, the frame 1 is up and down relative to the bottom frame 11 and, as a result of the pivot bearings 7 and 8, freely movable in the vertical direction, while being forced in the direction of travel of the rail car.
En langstrakt bølgeformet ujævnhed 6’ i skinnen 6 er for tydeligheds skyld noget overtegnet på figuren. Som det fremgår af tegningen, er rammen 1 længere end ujævnheden 6'.An elongated wavy unevenness 6 'in the rail 6 is somewhat over-drawn in the figure for clarity. As can be seen from the drawing, the frame 1 is longer than the bump 6 '.
Den omstændighed, at rammen 1 er længere end ujævnhedens bølgeprofil, og at den på rammen virkende fremdrivende kraft virker midt i slibeplanet gennem tappene 7 og 8 bevirker, at rammen hindres i at "kanten i forhold til skinnen, hvad der ville være tilfældet, hvis den fremdrivende kraft angreb højere oppe.The fact that the frame 1 is longer than the wave profile of the bump and that the thrust acting on the frame acts in the middle of the abrasive plane through the pins 7 and 8 causes the frame to be prevented from "edge to rail", which would be the case if the propulsive force attacked higher up.
5 1474415 147441
Slibeskiverne drives af en fælles motor 12 gennem tandhjul 13, 14 og 15, hvis aksler bærer slibeskiverne. Denne drivanordning har den fordel, at de fire slibeskiver ifølge opfindelsen skiftevis roterer højre og venstre om, som skematisk angivet i fig. 3· få den måde undgår man, at en til denne side rettet reaktionskraft skal påvirke rammen 1.The grinding wheels are driven by a common motor 12 through gears 13, 14 and 15, whose shafts carry the grinding wheels. This drive has the advantage that the four grinding wheels according to the invention rotate alternately right and left, as schematically indicated in FIG. 3 · get that way avoiding that a reaction force directed to this side should affect the frame 1.
Da rammen 1 med slibeskiverne 2 til 5 er ophængt højdeindstilleligt, kan slibetrykket indstilles uafhængigt af appara-tets vægt. Indstillingen kan ske ved hjælp af hydrauliske cylindre 17 og 18, som forbinder rammen 1 og vognbunden 11.Since the frame 1 with the grinding wheels 2 to 5 is suspended in height adjustable, the grinding pressure can be adjusted independently of the weight of the apparatus. The adjustment can be done by means of hydraulic cylinders 17 and 18, which connect the frame 1 and the carriage floor 11.
Den anden udførelsesform, som er vist til venstre i fig.The second embodiment shown on the left in FIG.
4, er identisk med den første med tindtagelse af slibeskivemes stilling. Slibeskiverne er som beskrevet i det foregående lejret i en ramme 19, der er ophængt under vognbunden 20 på et skinne-køretøj 21.4, is identical to the first with the position of the abrasive discs. As described above, the abrasive discs are mounted in a frame 19 which is suspended below the carriage floor 20 of a rail vehicle 21.
Skinnens ujævnheder befinder sig ikke altid på skinneoversiden, men kan også opstå på siderne af skinnen. Det er derfor påkrævet at kunne foretage en afslibning også af skinnens sider og af de afrundede overgangsdele mellem top- og sidefladerne.The unevenness of the rail is not always on the rail surface, but can also occur on the sides of the rail. It is therefore necessary to be able to grind even the sides of the rail and the rounded transition parts between the top and side surfaces.
Af denne grund er den anden udførelsesform udstyret med en enkelt skinnens overside slibende slibeskive 22 og tre slibeskiver 23, 24, 25, der er let skråtstillede og derfor virker på skinnens krumme overgangsflader.For this reason, the second embodiment is equipped with a single rail upper surface abrasive abrasive disc 22 and three abrasive discs 23, 24, 25 which are slightly inclined and therefore act on the curved transition surfaces of the rail.
Den tredie udførelsesform, som er vist til højre i fig. 5, omfatter en ramme 26, placeret i skinneretningen, hvilken ramme 26 bærer tre slibesten 27, 28 og 29. Slibestenene 27, 28 og 29 ligger i et lodret plan og tjener til slibning af skinnehovedets inderside.The third embodiment shown to the right in FIG. 5, includes a frame 26 located in the rail direction, which frame 26 carries three abrasive stones 27, 28 and 29. The abrasive stones 27, 28 and 29 lie in a vertical plane and serve to grind the inside of the rail head.
Slibeskiverne 27-29 drives af en fælles motor 30. Hammen 27 kan i dette tilfælde svinge om en lodret midterakse 31, der befinder sig i en blok 31*, som er forskydelig i vandret retning vinkelret på slibeplanet. En hydraulisk cylinder 32 gør det muligt at påvirke blokken 31' med en forud bestemt kraft i retning ind mod skinnens sideplan, hvilken kraft samtidig bestemmer slibetrykket.The grinding wheels 27-29 are driven by a common motor 30. In this case, the hammer 27 can pivot about a vertical center axis 31 located in a block 31 * which is displaceable in the horizontal direction perpendicular to the grinding plane. A hydraulic cylinder 32 makes it possible to actuate the block 31 'with a predetermined force towards the side plane of the rail, which at the same time determines the grinding pressure.
Som det fremgår af fig. 5 befinder rammen 26 svingakse 31 4 147441 sig tilnærmelsesvis midt i slibeplanet, hvad der opfylder den stillede fordring.As shown in FIG. 5, the frame 26 pivot axis 31 4 147441 is approximately in the middle of the abrasive plane which meets the required requirement.
Den i fig. 6 og 7 viste udførelsesform omfatter fire til en ramme 37 drejeligt lejrede slibeskiver 33-36, som drives enkeltvis af motorer 38-41. Slibeskiverne 33-36 virker med deres om-kredsflader og er i forhold til skinneretningen anbragt med en vis skråvinkel. Skivernes akser er rettet i vandret retning.The FIG. 6 and 7, four grinding discs 33-36 are rotatably mounted to a frame 37, which are driven individually by motors 38-41. The abrasive discs 33-36 work with their circumferential surfaces and are arranged with a certain inclination angle relative to the rail direction. The axes of the slices are oriented in a horizontal direction.
Sammens 37 ophængning er identisk med den i forbindelse med fig. 1 beskrevne ophængning. Det vil være af fordel at lade de fire slibeskiver rotere med skiftevis forskellige rotationsretninger, således at rammen 37 ikke udsættes for en til siden virkende reaktionskraft.The suspension of the assembly 37 is identical to that of FIG. 1 as described. It would be advantageous to allow the four abrasive wheels to rotate in alternating directions of rotation so that the frame 37 is not subjected to a lateral reaction force.
I fig. 8 og 9 er der skematisk vist to andre ophængnings-måder for den slibeskiverne bærende ramme. Under selve slibeprocessen påvirkes hver slibesten 43 af en kraft R, der virker modsat fremføringsretningen i skinneretningen. Kraften R skal overvindes af en fremføringskraft Ra, som angriber rammen 44. De hydrauliske cylindres tryk E^ + Eg udligner arbejdsreaktionstrykket U. Der ses bort fra de optrædende deles egenvægt.In FIG. 8 and 9, two other suspension modes for the abrasive disc bearing frame are schematically shown. During the grinding process itself, each grinding stone 43 is affected by a force R acting opposite to the feed direction in the rail direction. The force R must be overcome by a driving force Ra, which attacks the frame 44. The pressure E E + Eg of the hydraulic cylinders equalizes the working reaction pressure U. The weight of the acting parts is disregarded.
Uår R_ flugter med R - hvad der her er den anviste løs- α ning - vil rammen ikke have tendens til at kippe, da der ikke optræder drejemomenter.When R_ is flush with R - which is the solution here - the frame will not tend to tilt as no torque is present.
Som det fremgår af fig. 8 og 9 kan man opnå samme resultat selv om rammen 44 ophænges i et lejepunkt 45 > der befinder sig over arbejdsplanet. I dette tilfælde er det imidlertid utilladeligt, at se bort fra delenes egenvægt. Dette i modsætning til det tidligere omtalte tilfælde, hvor man af symmetrigrunde havde R·^ = Eg. E2 skal derimod nu være større end R-^, og dette i et sådant forhold, at kraftparallelogrammet får sit midtpunkt i 0, dvs. opnår en resultant, der peger gennem centrum af den aktive slibefalde.As shown in FIG. 8 and 9, the same result can be obtained even if the frame 44 is suspended at a bearing point 45> which is above the working plane. In this case, however, it is unlawful to disregard the weight of the parts. This is in contrast to the case mentioned earlier, where R · ^ = Eg. E2, on the other hand, must now be greater than R 1, and this in such a ratio that the force parallelogram gets its midpoint in 0, ie. obtains a resultant that points through the center of the active abrasive.
En videre på samme teori grundet udførelsesform er vist i fig. 10. Her bæres en ramme 46 med slibeskiver 47 af en svingbar, stiv arm 48, som delvis optager slibetrykket R^. En anden svingarm i form af en hydraulisk cylinder 49 overfører en kraft Eg. De to svingarme er rettet, så de tilnærmelsesvis med deres forlængelser krydser i den aktive slibeflades center 0.A further embodiment of the same theory is shown in FIG. 10. Here, a frame 46 with abrasive discs 47 is supported by a pivotable rigid arm 48 which partially accepts the abrasive pressure R 2. Another swing arm in the form of a hydraulic cylinder 49 transmits a force Eg. The two swing arms are directed so that, with their extensions, they intersect at the center of the active abrasive surface 0.
5 1474415 147441
Den nævnte hydrauliske cylinder 49 kan samtidig tjene til optrækning af slibeapparatet, når dette ikke skal anvendes.Said hydraulic cylinder 49 can simultaneously serve to retract the grinder when not in use.
Det er ifølge opfindelsen fordelagtigt at udstyre det til cylinderen 49 hørende hydrauliske system med drosselventiler eller lignende dæmpeanordninger, hvormed optrædende svingninger i slibeapparat et kan dæmpes.According to the invention, it is advantageous to equip the hydraulic system of the cylinder 49 with throttle valves or similar damping devices with which vibrations in the grinding apparatus can be dampened.
Skinnekøretøjet udstyres naturligvis med ens slibeapparater i begge sider til samtidig slibning af de to skinner.The rail vehicle is, of course, equipped with the same grinders on both sides to simultaneously grind the two rails.
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1223570A CH529260A (en) | 1970-08-14 | 1970-08-14 | Method for grinding long wavy waves of railway rails and device for its implementation |
CH1223570 | 1970-08-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
DK147441B true DK147441B (en) | 1984-08-06 |
DK147441C DK147441C (en) | 1985-02-18 |
Family
ID=4381136
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK399471A DK147441C (en) | 1970-08-14 | 1971-08-16 | RAIL GRINDING DEVICE |
Country Status (15)
Country | Link |
---|---|
US (1) | US3738066A (en) |
JP (1) | JPS5122680B1 (en) |
AT (1) | AT312653B (en) |
BE (1) | BE763667A (en) |
CA (1) | CA939151A (en) |
CH (1) | CH529260A (en) |
DE (1) | DE2118209C3 (en) |
DK (1) | DK147441C (en) |
ES (1) | ES389400A1 (en) |
FR (1) | FR2101381A5 (en) |
GB (1) | GB1360068A (en) |
NL (1) | NL147210B (en) |
NO (1) | NO130326B (en) |
SE (1) | SE370427B (en) |
ZA (1) | ZA714747B (en) |
Families Citing this family (32)
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CH548488A (en) * | 1972-06-08 | 1974-04-30 | Speno International | TRACK RECTIFICATION PROCESS OF A TRACK OF RAILS BY GRINDING ITS ROLLING SURFACE AND DEVICE FOR IMPLEMENTING THIS PROCESS. |
CH575509A5 (en) * | 1972-08-31 | 1976-05-14 | Scheuchzer Auguste Les Fils De | |
US3823455A (en) * | 1972-11-09 | 1974-07-16 | Racine Railroad Prod Inc | Rail polishing machine |
US3840968A (en) * | 1973-03-05 | 1974-10-15 | A Mason | Hydraulic slip joint pipe puller |
US3883323A (en) * | 1974-09-06 | 1975-05-13 | Lush E Cooley | Welded railroad rail grinding apparatus |
CH581232A5 (en) * | 1975-01-13 | 1976-10-29 | Speno International | |
CH583337A5 (en) * | 1975-02-25 | 1976-12-31 | Speno International | |
US4189873A (en) * | 1975-02-25 | 1980-02-26 | Speno International S.A. | Machine for truing the bearing surface of the rails of a railroad track |
CH596385A5 (en) * | 1975-05-21 | 1978-03-15 | Speno International | |
AT344772B (en) * | 1975-12-01 | 1978-08-10 | Plasser Bahnbaumasch Franz | RAIL GRINDING MACHINE |
AT344771B (en) * | 1975-12-01 | 1978-08-10 | Plasser Bahnbaumasch Franz | MOBILE RAIL GRINDING MACHINE |
CH606616A5 (en) * | 1976-02-18 | 1978-11-15 | Speno International | |
CH614476A5 (en) * | 1977-10-10 | 1979-11-30 | Scheuchzer Auguste Les Fils D | |
AT369456B (en) * | 1977-12-30 | 1983-01-10 | Plasser Bahnbaumasch Franz | TRACKABLE MACHINE FOR REMOVING RAIL HEAD SURFACE IRREGULARITIES, IN PARTICULAR RIFLES |
US4205494A (en) * | 1979-01-18 | 1980-06-03 | Speno Rail Services, Inc. | Rail grinding apparatus |
CH633336A5 (en) * | 1980-01-09 | 1982-11-30 | Speno International | RAILWAY SITE MACHINE FOR THE GRINDING OF RAIL MUSHROOM. |
DE3274205D1 (en) * | 1982-03-10 | 1987-01-02 | Matix Ind Sa | Apparatus for reshaping tracks by continuous milling |
EP0125348B1 (en) * | 1983-05-17 | 1986-10-15 | Les Fils D'auguste Scheuchzer S.A. | Machine for reprofiling rail heads |
US4583327A (en) * | 1983-11-25 | 1986-04-22 | Jackson Jordan, Inc. | Rail grinding car |
FR2557488B1 (en) * | 1983-12-28 | 1987-07-10 | Geismar Anc Ets L | USED RAIL REPROFILING MACHINE |
US4583893A (en) * | 1984-05-08 | 1986-04-22 | Matix Industries (Societe Anonyme) | Reprofiling device for rails through continuous milling |
GB2211083B (en) * | 1987-10-17 | 1991-07-10 | David John Potter | Artists easel |
CH675440A5 (en) * | 1988-03-04 | 1990-09-28 | Speno International | |
CH678341A5 (en) * | 1989-03-02 | 1991-08-30 | Speno International | |
DE4437585C1 (en) * | 1994-10-20 | 1996-03-21 | Pomikacsek Josef | Method and device for machining the running surface of rails by peripheral grinding |
US5662472A (en) * | 1995-08-18 | 1997-09-02 | Dentsply Gmbh | Hue and lightness identification system for dental products |
AT512270B1 (en) * | 2011-12-12 | 2014-08-15 | Liezen Und Giesserei Gesmbh Maschf | RAIL-PROCESSING DEVICE THROUGH CONTROLLED IMPROVEMENT OF THE MACHINING TOOLS |
AT515805B1 (en) * | 2014-07-29 | 2015-12-15 | Rungger Helmut | Rail vehicle with a device for reworking the tread of track rails |
CN105178122B (en) * | 2015-10-12 | 2017-10-10 | 北京东顺博望石油设备有限公司 | A kind of abrasive belt track grinding apparatus |
CN107813198B (en) * | 2017-10-23 | 2019-05-17 | 天津明日宇航新材料科技有限公司 | A kind of machining waveform outside part grinding device |
CN108972248A (en) * | 2018-10-22 | 2018-12-11 | 莱州文胜机械科技有限公司 | A kind of sanding machine |
CN109610250A (en) * | 2018-12-29 | 2019-04-12 | 中国铁建重工集团有限公司 | Turnout for suspension type rail |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US2035154A (en) * | 1935-01-29 | 1936-03-24 | Faries Robert | Rail grinding machine |
US2197729A (en) * | 1938-01-20 | 1940-04-16 | Pennsylvania Railroad Co | Track rail grinding apparatus |
FR1060027A (en) * | 1952-05-02 | 1954-03-30 | Freins Jourdain Monneret | Rail grinder pad |
DE1021746B (en) * | 1953-11-11 | 1957-12-27 | Scheuchzer Fils Auguste | Grinding device for railroad tracks |
DE1274610B (en) * | 1965-08-17 | 1968-08-08 | Elektro Thermit Gmbh | Rail grinding machine that can be moved by hand on one or both rails of a track |
US3358406A (en) * | 1965-10-14 | 1967-12-19 | Speno International | Rail grinder |
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1970
- 1970-08-14 CH CH1223570A patent/CH529260A/en not_active IP Right Cessation
-
1971
- 1971-02-23 AT AT154671A patent/AT312653B/en not_active IP Right Cessation
- 1971-03-02 BE BE763667A patent/BE763667A/en not_active IP Right Cessation
- 1971-03-05 FR FR7108574A patent/FR2101381A5/fr not_active Expired
- 1971-03-08 ES ES389400A patent/ES389400A1/en not_active Expired
- 1971-03-12 NO NO00952/71A patent/NO130326B/no unknown
- 1971-03-18 SE SE7103501A patent/SE370427B/xx unknown
- 1971-03-22 CA CA108,402A patent/CA939151A/en not_active Expired
- 1971-04-06 US US00131668A patent/US3738066A/en not_active Expired - Lifetime
- 1971-04-15 DE DE2118209A patent/DE2118209C3/en not_active Expired
- 1971-06-08 JP JP46039911A patent/JPS5122680B1/ja active Pending
- 1971-07-05 GB GB3132571A patent/GB1360068A/en not_active Expired
- 1971-07-16 ZA ZA714747A patent/ZA714747B/en unknown
- 1971-08-16 NL NL717111289A patent/NL147210B/en not_active IP Right Cessation
- 1971-08-16 DK DK399471A patent/DK147441C/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ES389400A1 (en) | 1973-06-16 |
ZA714747B (en) | 1972-07-26 |
CH529260A (en) | 1972-10-15 |
GB1360068A (en) | 1974-07-17 |
AT312653B (en) | 1974-01-10 |
NL147210B (en) | 1975-09-15 |
DK147441C (en) | 1985-02-18 |
DE2118209C3 (en) | 1982-04-08 |
NL7111289A (en) | 1972-02-16 |
NO130326B (en) | 1974-08-12 |
FR2101381A5 (en) | 1972-03-31 |
SE370427B (en) | 1974-10-14 |
DE2118209A1 (en) | 1972-02-17 |
DE2118209B2 (en) | 1976-04-22 |
BE763667A (en) | 1971-08-02 |
JPS5122680B1 (en) | 1976-07-12 |
US3738066A (en) | 1973-06-12 |
CA939151A (en) | 1974-01-01 |
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