US3807311A - Mobile track tamping and leveling machine - Google Patents

Mobile track tamping and leveling machine Download PDF

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Publication number
US3807311A
US3807311A US00268814A US26881472A US3807311A US 3807311 A US3807311 A US 3807311A US 00268814 A US00268814 A US 00268814A US 26881472 A US26881472 A US 26881472A US 3807311 A US3807311 A US 3807311A
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United States
Prior art keywords
track
machine
ballast
signal emitter
tamping
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Expired - Lifetime
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US00268814A
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English (en)
Inventor
F Plasser
J Theurer
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Franz Plasser Bahnbaumaschinen Industrie GmbH
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Individual
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B27/00—Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers
    • E01B27/12—Packing sleepers, with or without concurrent work on the track; Compacting track-carrying ballast
    • E01B27/13—Packing sleepers, with or without concurrent work on the track
    • E01B27/16—Sleeper-tamping machines
    • E01B27/17—Sleeper-tamping machines combined with means for lifting, levelling or slewing the track
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2203/00—Devices for working the railway-superstructure
    • E01B2203/10—Track-lifting or-lining devices or methods
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2203/00—Devices for working the railway-superstructure
    • E01B2203/12—Tamping devices
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2203/00—Devices for working the railway-superstructure
    • E01B2203/12—Tamping devices
    • E01B2203/127—Tamping devices vibrating the track surface
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2203/00—Devices for working the railway-superstructure
    • E01B2203/14—Way of locomotion or support
    • E01B2203/145—Way of locomotion or support on the ballast
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2203/00—Devices for working the railway-superstructure
    • E01B2203/16—Guiding or measuring means, e.g. for alignment, canting, stepwise propagation

Definitions

  • the drive for the tamping tools of a mobile track tamping and leveling machine vibrates and/or moves respective ones of the tools in respect of each other so as to exert a tamping pressure on the track ballast controlled to provide a predetermined degree of ballast compaction.
  • the drive control for regulating this compaction is responsive to a control signal indicating the actual ballast compaction and/or the geometric position of the track.
  • the present invention relates to improvements in a mobile track tamping and leveling machine which has a reference system, track lifting means for lifting the track in respect of the reference system, vertically adjustably vibratory tamping tools, and a drive means for the tamping tools.
  • the drive means for the tamping tools may comprise a drive for vibrating the tamping tools and a drive for moving respective ones of the tamping tools in respect of each other to compact ballast therebetween, and actuation of the drive means drives the tamping tools to exert a tamping pressure on the track ballast controlled to provide a predetermined degree of compaction thereof.
  • control for the drive means for regulating the predetermined degree of ballast compaction, a signal emitter producing an electrical control signal indicating the condition of the track, and means for transmitting the control signal to the control.
  • More than one signal emitter may be provided, a first one, forinstance, being adapted to indicate the actual degree of compaction of the ballast and a second emitter adapted to indicate the difference between the actual grade of the track and a desired grade of the track determined by the reference system.
  • the drive means preferably comprises a drive for vibrating the tamping tools and a drive for moving respective ones of the tamping tools in respect of each other to compact ballast therebetween, and the control is operatively associated with at least one of the drives.
  • the tamping pressure and/or the vibration frequency or amplitude is controlled in response to the actual track condition in each track section, this control being automatically and continuously adjusted as the machine proceeds along the track.
  • the control signal will be correspondingly stronger than in a section requiring little correction or tamping so that the tamping pressure will be continuously adapted to the prevailing track conditions. It will also be useful to adjust the vibration frequency and/or amplitude of the tamping tools correspondingly, for instance to increase the vibration frequency when the ballast is highly compacted, i.e., encrusted after long use.
  • the control for the motor is an adjustable means, such as a solenoid valve, for supplying hydraulic fluid to the motor.
  • a differential unit has an output connected to the adjustable fluid supply means and two inputs connected respectively to the signal emitter for receiving the control signal therefrom and to a pressure gauge indicating the actual hydraulic pressure in the motor for receiving a signal corresponding thereto.
  • a signal amplifier is connected between the differential unit output and the adjustable fluid supply means.
  • the signal emitter and the adjustable fluid supply means are pre-set so that a predetermined hydraulic pressure value in the drive motor corresponds to a predetermined lifting stroke, this pressure value having been empirically determined, or a predetermined rotational speed of the vibrating motor to adjust the vibration frequency to the density of the ballast.
  • the adjustable fluid supply means may be a regulator for changing the rotational speed of the hydraulic fluid supply pump motor or a solenoid bypass valve.
  • the signal emitter is preferably a rotary potentiometer.
  • One such signal emitter to indicate the geometric track position in an uncorrected track section may be mounted on a track level measuring buggy mounted on the track immediately ahead of the track lifting means.
  • the potentiometer has a rotary shaft carrying a radially extending forked arm, and the reference system comprises a tensioned reference wire received in the forked arm.
  • the machine comprises a frame and an undercarriage supporting the frame in an uncorrected track section, a measuring buggy is mounted on the track adjacent the undercarriage for indicating the deformation of the track under the load of the undercarriage by the vertical movement of the measuring buggy, and a further signal emitter produces an electrical control signal indicating the vertical movement of the measuring buggy.
  • Control in dependence on the actual ballast compaction may be provided in accordance with the invention with an additional signal emitter mounted in an uncorrected track section.
  • a loaded pressure roller is supported by the ballast and immersed therein to an extent which is a function of the degree of ballast compaction, and the pressure roller carries the additional signal emitter, the control signal thereof being responsive to the extent of immersion of the roller in the ballast.
  • FIG. 1 is a schematic side elevational view of a track tamping and leveling machine according to this invention, including a control circuit diagram;
  • FIGS. 2 and 3 are transverse sections showing alternative modifications of the arrangement of one of the control signal emitters.
  • FIG. 4 is aview similar to that of FIG. 1 of another embodiment.
  • FIG. 1 there. is shown a mobile track tamping and leveling machine comprising a frame 3 whose undercarriages 1 and 2 run on the track, the forward undercarriage 2 being in an uncorrected track section while the rear undercarriage 1 runs on the corrected track section.
  • Operating cabins 4 and 5 are mounted at the forward and rear ends of the frame while the track lifting means 6, 7 and the tamping unit 9 are mounted on the frame intermediate therof.
  • the track lifting means comprises the hydraulic motor 7 and the clamping rollers 6, the lifting means being combined with a lining means comprising rail clamping rollers 8.
  • the tamping unit comprises pairs of reciprocating tamping tools 9a. Furthermore, a leveling reference system is provided, the system comprising a tensioned reference wire 12 supported on measuring buggies 10, 11, with the forward buggy 10 running on the rails of the uncorrected'track section while the rear buggy 11 runs on the corrected track.
  • the tensioned reference wire is associated with a sensing element 14 mounted on a third measuring buggy 13 in the region of the tamping unit and track lifting means to indicate the actual level of the track at the correction station. All of the above structures and their operation in mobile track tamping and leveling machines are well known and, therefore, further explanations are omitted to avoid prolixity.
  • the tamping unit 9 which is mounted on a vertically adjustable frame 15 and comprises a series of pairs of tamping tools 9a immersible in the ballast 18 in the track cribs adjacent a tie 16 at both sides of each rail 17.
  • the tamping tools are pivotal about pivots 19 intermediate their ends, the upper ends thereof being linked to hydraulic motor drives 20 for moving the tamping tools of each pair in respect of each other to compact ballast therebetween.
  • a central cam or eccenter shaft 21 is mounted between the hydraulic motors to provide a drive for vibrating the tamping tools, the shaft 21 being rotatable by hydraulic motor 22.
  • the hydraulic drives 20 reciprocate the tamping tools in the direction of track elongation while they are being vibrated.
  • the hydraulic pressure in motors 20 corresponds to the tamping pressure, i.e., the piessure exerted upon the ballast by the closing tamping tools, and this pressure determines the degree of ballast compaction.
  • a control is provided for the drive means of the tamping tools for regulating the degree of compaction.
  • this control comprises a control device 23 associated with the temping tool moving drives 20 and a control device 24 associated with the tamping tool vibrating drive 22 to regulate the pressure of tamping tools 9a as well as the vibration frequency and/or amplitude thereof in dependence on the prevailing track condition, particularly the geometric level of the track and the compaction of the ballast.
  • respective signal emitters 25 and 26 produce electrical control signals respectively indicating the track position and ballast compaction, these signal emitters being mounted on frame 3 in the uncorrection track section and means being provided to transmit the control signals to the respective control devices.
  • the control device 23 is an adjustable solenoid valve regulating the hydraulic fluid pressure in motors 20.
  • the control circuit which transmits the control signal from signal emitter 25 comprises a differential unit 28 whose output is connected to solenoid valve 23, the output signal of the differential unit being amplified by signal amplifier 27 arranged between the output of the differential unit and the solenoid valve.
  • a first input of the unit 28 is connected to signal emitter 25 which indicates the geometric position of the track while a second input of the unit is connected via electrical conductor line 29 to pressure gauge 30 indicating the actual hydraulic pressure in motors 20.
  • the pressure gauge 30 is a rotary potentiometer regulated in response to the hydraulic motor pressure.
  • the signal emitter 25 also is a rotary potentiometer mounted on measuring buggy 31 to indicate the actual level of the track in the uncorrected track seciton, where the buggy runs on the track, the potentiometer 25 having a rotary shaft 25a carrying a radially extending forked arm 32 receiving the tensioned wire 12 of the reference system.
  • the control device 24 for changing the vibration frequency'of the tamping tools 9a is a solenoid bypass valve mounted in the supply conduit delivering hydraulic fluid to vibrating motor 22 so as to regulate the amount of fluid delivered and thus the rotational speed of the motor
  • the control circuit which transmits the control signal from emitter 26 comprises a differential unit 34 whose output is connected to solenoid valve 24, the output signal of the differential unit being amplified by signal amplifier 33 arranged between the output of the differential unit and the solenoid valve.
  • a first input of the unit 34 is connected to signal emitter 26 which indicates the degree of ballast campaction while a second input of the unit is connected via electrical conductor line 35 to gauge 36 indicating the amount of hydraulic fluid delivered.
  • This gauge is embodied in a rotary potentiometer transmitting an input signal to the differential unit 34 whose magnitude depends on the setting of valve 24. If would also be possible, however, to embody gauge 36 in a governor for regulating the rotational speed of the drive motor for hydraulic fluid delivery pump 37 which supplies the fluid from sump 44 to the tamping tool drives, the governor being adjustable in response to the setting of the signal emitter 26.
  • a safety valve 43 is also mounted on the hydraulic supply circuit.
  • the signal emitter 26 also is a rotary potentiometer which is fixedly mounted on machine frame 3 and has a rotary shaft 26a carrying a radially extending forked arm 38 engaging pin 41 projecting from piston rod 39, the piston rod having a lower end on which pressure roller 42 is mounted while the upper end thereof extends into pressure fluid cylinder 40 fixedly mounted on the frame and extending substantially vertically.
  • Pressure fluid is supplied to cylinder 40 under substantially constant pressure so that the pressure roller is pressed against the ballast under such constant pressure as the machine moves along the track. Accordingly, as the degress of compaction, i.e., the density, of the ballast 18 changes, the loaded pressure roller is immersed therein to an extent x which is solely a function of the ballast compaction. Therefore, the control signal emitted from potentiometer 26 is responsive to the immersion of roller 42 in the ballast.
  • the pressure roller 42 may be mounted for engagement with ballast 18 outside the track cribs in the region of the ballast shoulder, the cylinder 40 and signal emitter 26 being mounted on the frame laterally outside the track.
  • the pressure roller is mounted for engagement with the ballast between the track rails l7, 17 so that the ballast density in the track cribs is measured.
  • a plurality of such pressure rollers could be mounted at different points so gauge the track compaction in the cribs and along the shoulder of the ballast bed, all of their control signals being fed to a common differentiating unit for providing an average control signal. It would also be possible to transmit the control signals from emitters and 26 to a common control device 23 or 24 to control the mutual movement of the tamping tools or their vibration frequency. Also, if desired, the cylinder 40 may be under air instead of hydraulic pressure.
  • FIG. 4 uses the same reference numerals for like parts to obviate a repetition of the description of those portions of the machine that are the same as those of FIG. 1.
  • a further signal emitter 46 is provided to indicate the condition of the track under a load.
  • a freely floating measuring buggy 47 is mounted on the track adjacent undercarriage 2 for indicating the deformation of the track under the load of the undercarriage by the vertical movement of the measuring buggy in response to such deformation.
  • the measuring buggy 47 is mounted behind the undercarriage 2 and is freely vertically movable in relation thereto so that the relative movement between the buggy 47 and undercarriage 2 constitutes a measurement of the deformation of the track under the load of the undercarraige.
  • the mounting is such that a first bell crank lever 48 having an arm 48a longer than arm 49b carries the measuring buggy 47 while a second bell crank lever 49 having an arm d9a longer than arm 4% has the longer arm linked to the undercarriage.
  • Both bell crank levers are pivoted to the machine frame 3, and a flexible rod 46 with wire strain gauge interconnects the arms 48b and 49b of the levers to produce a control signal corresponding to the deformation measured by buggy 47 riding on the rails.
  • the control signal from signal emitter 46 is transmitted to solenoid valve 23 via a delay circuit 56 so that the valve 23 regulates the pressure in drives 20 of tamping tools 9a not only in response to the geometric track position measured at 31 but also in dependence on the track deformation under load.
  • Another delay circuit 45 is mounted in the control circuit between signal emitter 25 and the solenoid valve, the delay time in the circuits 56 and &5 being set in dependence of the distance of tamping unit 9 from the respective signal emitters 25 and 46, the distance traveled by the machine during the leveling operation being measured by odometer 52 connected to a signal emitter 51 transmitting a signal corresponding to this distance to the control circuit.
  • control signals from emitters 25 and 46 are delayed by circuits 45 and 56 by a time determined by the signal transmitted from the odometer so that the control 23 operates with a predetermined delay.
  • the hydraulic pressure in drives 20 is changed by the control signals from emitters 25 and 46 only when the machine has reached the track section where the emitters operate.
  • visible meters 53 and 54 connected to the control signal emitters for indicating and recording the geometric position of the track and the ballast condition under load, as well as a permanent recording instrument 55 which makes a permanent record of these values, the recording drum being rotated under control of the signal pulses received from odometer 52.
  • These recording instruments may be used, under special circumstances, for manually changing the pressure in the drives 20 and/or 22. In this manner, the operator who wishes to make adjustment does not have to depend on his judgement but is guided by actual measurements in operating adjustment handle 56 for controlling the hydraulic fluid supply to the drives.
  • the signal emitters may be modifled so that they sense a light beam reference instead.
  • the vibration amplitude may be controlled in addition to, or instead of, the frequency of vibration.
  • a mobile track tamping and leveling machine comprising 1. a reference system,
  • a signal emitter producing an electrical control signal indicating the condition of the track
  • the electrical control signal emitter is adapted to indicate the difference between the actual grade of the track and a desired grade of the track determined by the reference system.
  • the drive means comprises a drive for vibrating the tamping tools and a drive for moving respective ones of said tamping tools in respect of each other to compact ballast therebetween, the control being operatively associated with at least one of said drives.
  • At least one of the drives is a hydraulic motor
  • the control for the hydraulic motor is an adjustable means for supplying hydraulic fluid to the motor
  • a differential unit has an output connected to the adjustable fluid supply means and two inputs connected respectively to the signal emitter for receiving the control signal therefrom and to a pressure gauge indicating the actual hydraulic pressure in the motor for receiving a signal corresponding thereto.
  • adjustable hydraulic fluid supply means comprises a solenoid valve.
  • the machine of claim 1 further comprising a track level measuring buggy mounted on the track in an uncorrected track section immediately ahead of the track lifting means, the signal emitter is a rotary potentiometer mounted on the measuring buggy to indicate the geometric track position in said uncorrected track section, the potentiometer having a rotary shaft carrying a radially extending forked arm, and the reference system comprises a tensioned reference wire received in said forked arm.
  • the machine of claim 1 further comprising a frame and and undercarriage supporting the frame in an uncorrected track section, a measuring buggy mounted on the track adjacent the undercarriage for indicating the deformation of the track under the load of the undercarriage by the vertical movement of the measuring buggy, and a further signal emitter producing an electrical control signal indicating the vertical movement of the measuring buggy.
  • the machine of claim 8 further comprising a first bell crank lever mounted on the frame adjacent the undercarriage, one of the arms of the bell crank lever being longer than the other arm thereof, the measuring buggy being carried by the one bell crank lever arm, and a second bell crank lever mounted on the frame and also having one arm longer than the other arm thereof, the further signal emitter interconnecting the other arms of the bell crank levers, and the one arm of the second bell crank lever being pivoted to the under- 8 carriage.
  • the further signal emitter includes a flexible rod comprising a resistive wire strain gauge.
  • the machine of claim 1 further comprising an additional signal emitter producing an electrical control signal indicating the degree of compaction of the ballast, the addition signal emitter being mounted in an uncorrected track section, and a loaded pressure roller supported by the ballast and immersed therein to an extent which is a function of the ballast compaction, the pressure roller carrying the additional signal emitter and the control signal thereof being responsive to the extent of immersion of the roller in the ballast.
  • the additional signal emitter is a rotary potentiometer mounted on the frame, the potentiometer having a rotary shaft carrying a radially extending forked arm, the piston rod having a pin projecting therefrom, and the forked arm engaging the piston rod pin.
  • the machine of claim 1 comprising a first one of said signal emitters mounted in an uncorrected track section spaced forwardly of the track lifting means for indicating the deformation of the track under load, a second one of the signal emitters mounted adjacent the track lifting means for indicating the geometric track position in the uncorrected track section, the control signals of both emitters being transmitted to the control, and a recording instrument connected at least to the first signal emitter.
  • the machine of claim 1 further comprising a delay circuit in the means for transmitting the control signal to the control, the transmission delay in the delay circuit being set in dependence of the distance of the tamping tools from the signal emitter, and further comprising an odometer measuring the distance traveled by the mobile machine and a signal pulse emitter for feeding a pulse corresponding to the traveled distance to the delay circuit.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
US00268814A 1971-07-14 1972-07-03 Mobile track tamping and leveling machine Expired - Lifetime US3807311A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT614271A AT319993B (de) 1971-07-14 1971-07-14 Fahrbare Gleisnivellier-Stopfmaschine

Publications (1)

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US3807311A true US3807311A (en) 1974-04-30

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US00268814A Expired - Lifetime US3807311A (en) 1971-07-14 1972-07-03 Mobile track tamping and leveling machine

Country Status (16)

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US (1) US3807311A (nl)
JP (1) JPS5329881B1 (nl)
AR (1) AR228826A1 (nl)
AT (1) AT319993B (nl)
AU (1) AU473874B2 (nl)
BR (1) BR7204611D0 (nl)
CA (1) CA960086A (nl)
CH (1) CH553883A (nl)
CS (1) CS184810B2 (nl)
DE (1) DE2228958C2 (nl)
FR (1) FR2145920A5 (nl)
GB (1) GB1394249A (nl)
IT (1) IT962771B (nl)
RO (1) RO58437A (nl)
SE (1) SE370426B (nl)
ZA (1) ZA724717B (nl)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3910195A (en) * 1973-04-26 1975-10-07 Plasser Bahnbaumasch Franz Track tamper and leveler
US3919943A (en) * 1972-10-13 1975-11-18 Erma Plasser Track surfacing method
US3949678A (en) * 1973-05-25 1976-04-13 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H. Method for tamping and leveling track
US4010692A (en) * 1975-01-17 1977-03-08 Matisa Materiel Industries S.A. Process for tamping railway tracks and a movable machine for effecting the process
US4040292A (en) * 1975-01-28 1977-08-09 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H. Method and apparatus for indicating the density of ballast
US4060963A (en) * 1975-04-12 1977-12-06 Fritz Stahlecker Guide track arrangement and method of adjusting the same
US4088077A (en) * 1976-03-15 1978-05-09 Canron, Inc. Continuous tamping device
US4111129A (en) * 1976-03-31 1978-09-05 Canron Railgroup Method and apparatus for the vibratory tamping of railway tracks
US4476786A (en) * 1981-03-09 1984-10-16 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H. Ballast tamping machine
US5127333A (en) * 1990-02-06 1992-07-07 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H. Track maintenance machine for compacting ballast
US20060090666A1 (en) * 2004-10-29 2006-05-04 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B. H. Method for tamping ballast supporting track ties
US20110035931A1 (en) * 2008-04-16 2011-02-17 Totankako Co., Ltd. Lead wire implanting apparatus and lead wire implanting method
US20160010287A1 (en) * 2013-02-22 2016-01-14 System7-Railsupport Gmbh Tamping unit for a track tamping machine
US9810614B2 (en) 2012-10-30 2017-11-07 Sncf Reseau Method for evaluating the compactness of a layer of railway line ballast, device for implementing same and method for predicting the compaction of said layer of ballast

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT339358B (de) * 1974-05-09 1977-10-10 Plasser Bahnbaumasch Franz Antriebs- und steuereinrichtung fur vibrier- und verstellbare werkzeuge einer gleisbearbeitungsmaschine, insbesondere fahrbare gleisstopfmaschine
AT364383B (de) * 1979-02-26 1981-10-12 Plasser Bahnbaumasch Franz Gleisstopfmaschine mit stopftiefensteuerung
AT369455B (de) * 1981-02-02 1983-01-10 Plasser Bahnbaumasch Franz Nivellier-gleisstopfmaschine mit automatischer stopfdruckregelung
ES535188A0 (es) * 1983-08-17 1985-12-01 Syntex Inc Procedimiento para la preparacion de alfa-aminoacidos alfa-alenicos
AT401398B (de) * 1990-02-06 1996-08-26 Plasser Bahnbaumasch Franz Kontinuierlich verfahrbare gleisbaumaschine zum verdichten der schotterbettung

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US3298105A (en) * 1963-02-08 1967-01-17 John K Stewart High frequency surveying device
US3363582A (en) * 1964-03-16 1968-01-16 Plasser Franz Track grading
US3662687A (en) * 1969-06-12 1972-05-16 Robel & Co Track levelling and tamping machines
US3719150A (en) * 1969-12-19 1973-03-06 Plasser Bahnbaumasch Franz Mobile track tamper

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1248083B (de) * 1964-01-31 1967-08-24 Deutsche Reichsbahn Gleisstopfmaschine mit einem Gleisheber

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3298105A (en) * 1963-02-08 1967-01-17 John K Stewart High frequency surveying device
US3363582A (en) * 1964-03-16 1968-01-16 Plasser Franz Track grading
US3662687A (en) * 1969-06-12 1972-05-16 Robel & Co Track levelling and tamping machines
US3719150A (en) * 1969-12-19 1973-03-06 Plasser Bahnbaumasch Franz Mobile track tamper

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3919943A (en) * 1972-10-13 1975-11-18 Erma Plasser Track surfacing method
US4334479A (en) * 1973-04-26 1982-06-15 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H. Method and apparatus for obtaining a controlled degree of ballast compaction in the tamping and leveling of a truck
US3910195A (en) * 1973-04-26 1975-10-07 Plasser Bahnbaumasch Franz Track tamper and leveler
US3949678A (en) * 1973-05-25 1976-04-13 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H. Method for tamping and leveling track
US4010692A (en) * 1975-01-17 1977-03-08 Matisa Materiel Industries S.A. Process for tamping railway tracks and a movable machine for effecting the process
US4040292A (en) * 1975-01-28 1977-08-09 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H. Method and apparatus for indicating the density of ballast
US4060963A (en) * 1975-04-12 1977-12-06 Fritz Stahlecker Guide track arrangement and method of adjusting the same
US4088077A (en) * 1976-03-15 1978-05-09 Canron, Inc. Continuous tamping device
US4111129A (en) * 1976-03-31 1978-09-05 Canron Railgroup Method and apparatus for the vibratory tamping of railway tracks
US4476786A (en) * 1981-03-09 1984-10-16 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H. Ballast tamping machine
US5127333A (en) * 1990-02-06 1992-07-07 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H. Track maintenance machine for compacting ballast
US20060090666A1 (en) * 2004-10-29 2006-05-04 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B. H. Method for tamping ballast supporting track ties
US20110035931A1 (en) * 2008-04-16 2011-02-17 Totankako Co., Ltd. Lead wire implanting apparatus and lead wire implanting method
US8407886B2 (en) * 2008-04-16 2013-04-02 Totankako Co., Ltd. Lead wire implanting apparatus
US9810614B2 (en) 2012-10-30 2017-11-07 Sncf Reseau Method for evaluating the compactness of a layer of railway line ballast, device for implementing same and method for predicting the compaction of said layer of ballast
US20160010287A1 (en) * 2013-02-22 2016-01-14 System7-Railsupport Gmbh Tamping unit for a track tamping machine
US9957668B2 (en) * 2013-02-22 2018-05-01 System 7-Railsupport Gmbh Tamping unit for a track tamping machine

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Publication number Publication date
AU473874B2 (en) 1976-07-08
IT962771B (it) 1973-12-31
CS184810B2 (en) 1978-09-15
GB1394249A (en) 1975-05-14
CA960086A (en) 1974-12-31
AT319993B (de) 1975-01-27
JPS5329881B1 (nl) 1978-08-23
AU4370472A (en) 1974-01-03
AR228826A1 (es) 1983-04-29
ZA724717B (en) 1973-04-25
FR2145920A5 (nl) 1973-02-23
DE2228958A1 (de) 1973-01-25
CH553883A (de) 1974-09-13
SE370426B (nl) 1974-10-14
RO58437A (nl) 1975-09-15
DE2228958C2 (de) 1983-10-20
BR7204611D0 (pt) 1973-06-21

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