US3768665A - Travelling crane - Google Patents

Travelling crane Download PDF

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Publication number
US3768665A
US3768665A US00056884A US3768665DA US3768665A US 3768665 A US3768665 A US 3768665A US 00056884 A US00056884 A US 00056884A US 3768665D A US3768665D A US 3768665DA US 3768665 A US3768665 A US 3768665A
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United States
Prior art keywords
superstructure
chassis
jib
cabin
driver
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00056884A
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English (en)
Inventor
P Eiler
H Weiskopf
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Leo Gottwald KG
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Leo Gottwald KG
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Publication date
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Publication of US3768665A publication Critical patent/US3768665A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/52—Details of compartments for driving engines or motors or of operator's stands or cabins
    • B66C13/54—Operator's stands or cabins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • B66C23/42—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes with jibs of adjustable configuration, e.g. foldable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/72—Counterweights or supports for balancing lifting couples
    • B66C23/74—Counterweights or supports for balancing lifting couples separate from jib
    • B66C23/76—Counterweights or supports for balancing lifting couples separate from jib and movable to take account of variations of load or of variations of length of jib

Definitions

  • ABSTRACT A travelling crane having a slewing superstructure which carries a telescopic jib and, to one side of the jib, a drivers cabin and a cranemans cabin.
  • the invention relates to mobile cranes with a jib forming part of a superstructure mounted on a chassis through a turntable, and with a drivers cabin for the driver of the vehicle and a cranemans cabin for the crane operator.
  • the drivers cabin is mounted on the chassis of the vehicle whereas the cranemans cabin is mounted as part of the superstructure.
  • This conventional arrangement involving separate cabins, the one mounted on the chassis and the other on the superstructure, does not allow the centre of gravity of the superstructure to be positioned midway between the front and rear support beams.
  • the axis of rotation of the superstructure has to be positioned as far away as possible from the drivers cabin to allow a full freedom of rotation for the superstructure.
  • the object of the present invention is to provide a mobile crane, particularly but not necessarily with a telescopic jib, of the kind mentioned at the beginning, in which the centre of gravity of the superstructure is positioned as centrally as possible, without this involving any considerable extra cost of construction, the resulting vehicle being simple to operate.
  • This arrangement allows the centre of gravity of the superstructure to be located almost midway between the two support beams of the chassis.
  • the jib can be mounted at the beam height as the cabins, with the result that the entire vehicle is comparatively low.
  • the vehicle is unusually stable and is capable of lifting high loads both when supported by its support boxes and when travelling along.
  • the greatest advantages are obtained by combining the drivers cabin with the cranemans cabin so as to form a single unit, that is to say a double cabin, the drivers cabin facing away from the direction in which the jib extends structure. This brings the jib head closer to the back wheels of the vehicle, making it much easier to handle loads when the vehicle is supported entirely by its wheels and when travelling.
  • the superstructure consists essentially of a shell in which the jib can slide longitudinally, the shell being mounted to pivot in bearings in a frame which is U-shaped in cross section.
  • rams anchored to the frame The pistons of the ram cylinders can for example engage with longitudinally travelling beams which support the counterweight for the jib, the counterweight being connectable by a linkage system to the inner end of the jib.
  • Driving the counterweight forward also shifts the jib forward, improving the stability of the vehicle.
  • the jib When the jib is in its forward position it can still be lifted, although not from the superstructure and the cranemans cabin facing in the direction in which the jib extends from the superstructure. This arrangement reduces the cost of manufacture and gives the driver a particularly good field of view when travelling, without any necessity to swing the jib out of the way.
  • the known mobile cranes with telescopic jibs also have the disadvantage that when the telescopic jib has been telescoped together it still projects excessively far out beyond the rear of the vehicle when travelling. It is of course, desirable to provide the longest possible jib when extended, and the jib is comparatively long even after it has been telescoped together. But if the jib extends too far out behind the vehicle a heavy load which is being dragged away or transported away applies an excessive backwards tipping movement to the vehicle.
  • This difficulty is avoided in the present invention by positioning the cabin unit on one side, next to the telescopic jib, and by arranging that the entire telescopic jib, consisting of several telescoping parts, is adjustable in position longitudinally with respect to the super entirely, but enough to lift and support loads while the vehicle is travelling.
  • the connecting linkage between the counterweight and the inner end of the jib allows either the counterweight or the jib or both to be shifted in position fore and aft.
  • the drivers cabin can extend across the entire width of the vehicle.
  • FIG. 1 is a side elevation
  • FIG. 2 is a cross section taken onjthe line II-ll in FIG. 1;
  • FIG. 3 is a plan.
  • the illustrated crane has a chassis l with support beams 2 and 3, double rear axles 4 and 5 and a front axle 5. 1
  • the chassis 1 supports a turntable 6 on which is mounted a superstructure 7, including a driver's cabin 8, for the driver of the vehicle, and a cranemans cabin 9, for the operator of the crane, the two cabins being constructed as a single unit to form a double cabin assembly 11.
  • the double cabin 11 is mounted next to a telescopic jib 12 consisting of several telescoping parts 13.
  • a telescopic jib 12 consisting of several telescoping parts 13.
  • ajib head 15 equipped with pulley wheels 14.
  • the telescopic jib 12 is mounted on the turntable 6 by means of a frame 16 which is U-shaped in cross section and supports in its upper part a bearing 17 in which there pivots a shell structure 18.
  • the shell 18 has a cross section suitable for receiving the telescopic jib 12, as shown in particular in FIG. 2.
  • a counterweight 22 is supported by longitudinal beams 23 adjustable in position fore and aft by hydraulic ram cylinders 24 anchored on the frame 16. Connecting links 21 allow the counterweight 22 to be attached to the inner end of the telescopic jib 12.
  • the ram cylinders 19 are operated, the shell 18 pivoting in its bearings 17.
  • the counterweight 22 fore and aft the ram cylinders 24 are operated. If the counterweight 22 has been coupled to the jib 12 by the connecting linkage 21, the telescopic jib 12 also moves fore and aft with the counterweight 22, so that under these circumstances the ram cylinders 24 can be made to shift the telescopic jib 12 into a forward position as indicated by the broken lines in FIG. 1. This alows the telescopic jib 12 to be shifted into a forward psition for example when the chassis is not resting on legs under its support beams. When the jib 12 is in its forward position the jib head 15 is closer to the rear wheels of the vehicle, for
  • the jib 12 When the jib 12 is in its forward position it can be raised and lowered, and the vehicle can be driven with a load suspended from the jib head.
  • a mobile telescoping rotary crane includes a wheel supported longitudinally extending chassis having a front end and a rear end spaced apart in the longitudinal direction thereof, a superstructure mounted on said chassis, means for interconnecting said superstructure and chassis for rotary movement of said superstructure relative to said chassis, a telescopic jib mounted on said superstructure for rotation therewith and having a head end and a base end, a drivers cabin from which the driver of said wheeled chassis operates and controls the movement of said wheeled chassis, a cranemans cabin from which the craneman operates said jib, wherein the improvement comprises that both said drivers cabin and said cranemans cabin are mounted on said superstructure as a single unit for rotation therewith and said drivers cabin faces he front end of said chassis when the crane is being driven and said cranemans cabin faces in the opposite direction to said drivers cabin, said means for interconnecting said superstructure and chassis includes a turntable positioned intermediate the front end and rear end of said chassis for free rotary mobility of said drivers cabin and cranemans cabin
  • a crane according to claim 1 whrein said means for adjustably positioning said jib are located on said superstructure and comprise a frame of U-shape, and a shell structure in which said telescopic jib is slidably displaceable in the longitudinal direction, said shell being pivotally mounted for luffing said jib in said frame.
  • faid superstructuer includes longitudinally extending beams which extend in the longitudinal direction of said chassis, rams anchored to said frame and to said longitudinal beams for driving said longitudinal beams in their longitudinal direction, and a counterweight for said jib supported on said longitudinal beam so that said counterweight can be displaced by said rams in the longitudinal direction of said beams.
  • a crane according to claim 6, further compriing a linkage connector adapted to attach said counterweight to said jib.
  • a mobile telescoping rotary crane includes a wheel supported chassis, a superstructure mounted on said chassis, means for interconnecting said superstructure and chassis for rotary movement of said superstructure relative to said chassis, a telescopic jib mounted on said superstructure, a drivers cabin for the driver of said wheeled chassis, a cranemans cabin for the operator of said jib, wherein the improvement comprises that both said drivers cabin and cranemans cabin are mounted on said superstructure for free rotary mobility of said superstructure and for reducing the tilting moment due to the poistion of said means for interconnecting said superstructure and chassis for the rotary movement of said superstructure, means provided for adjusting said jib in position longitudinally with respect to said superstructure, said superstructure comprises a frame of U- shape and a shell structure in which said telescopic jib can slide longitudinally, said shell structure being pivoted for luffing said jib in said frame, pivot means are positioned in the upper part of said frame and said shell structure is mounted to pivot in

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
US00056884A 1969-07-23 1970-07-21 Travelling crane Expired - Lifetime US3768665A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691937349 DE1937349B2 (de) 1969-07-23 1969-07-23 Kranfahrzeug mit drehbarem oberwagen

Publications (1)

Publication Number Publication Date
US3768665A true US3768665A (en) 1973-10-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00056884A Expired - Lifetime US3768665A (en) 1969-07-23 1970-07-21 Travelling crane

Country Status (7)

Country Link
US (1) US3768665A (enrdf_load_stackoverflow)
BE (1) BE753800A (enrdf_load_stackoverflow)
DE (1) DE1937349B2 (enrdf_load_stackoverflow)
FR (1) FR2053088B1 (enrdf_load_stackoverflow)
GB (1) GB1312126A (enrdf_load_stackoverflow)
PL (1) PL73308B2 (enrdf_load_stackoverflow)
ZA (1) ZA704960B (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2544525A1 (de) * 1974-10-05 1976-05-06 Coles Cranes Ltd Fahrbarer kran
US4664585A (en) * 1984-04-26 1987-05-12 Ambridge Richard J Towing vehicle
US4728249A (en) * 1985-12-11 1988-03-01 The Gradall Company Telescoping boom assembly with longitudinally displaceable base boom section
US4988009A (en) * 1988-05-12 1991-01-29 Grove Coles Limited Telescopic boom mobile cranes
US6098823A (en) * 1998-02-27 2000-08-08 Jlg Industries, Inc. Stabilizing arrangements in and for load-bearing apparatus
US6409457B1 (en) * 1999-10-15 2002-06-25 George Korycan Work vehicle
US20140299563A1 (en) * 2011-11-21 2014-10-09 Wolffkran Holding Ag Counterweight fixing device
US20240175285A1 (en) * 2022-11-29 2024-05-30 Zero Climb Tower Company, LLC Tilt tower with adjustable counterweight system

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US3987594A (en) * 1975-02-06 1976-10-26 Clark Equipment Company System and method for automatic unstowing and stowing of a crane boom
FI822838L (fi) * 1981-08-18 1983-02-19 Coles Cranes Ltd Lyftkran
NO851858L (no) * 1984-07-17 1986-01-20 Mora Hydraulics Ab Anordning ved bergningskjoeretoey.
DD262005A1 (de) * 1987-07-08 1988-11-16 Schwermasch Kirow Veb K Auslegersystem fuer krane, insbesondere fuer mobile krane
DE9114464U1 (de) * 1991-11-21 1993-03-25 Krupp Industrietechnik GmbH, 4100 Duisburg Kranfahrzeug
US7100710B2 (en) 1994-10-14 2006-09-05 Weatherford/Lamb, Inc. Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7147068B2 (en) 1994-10-14 2006-12-12 Weatherford / Lamb, Inc. Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7036610B1 (en) 1994-10-14 2006-05-02 Weatherford / Lamb, Inc. Apparatus and method for completing oil and gas wells
US7040420B2 (en) 1994-10-14 2006-05-09 Weatherford/Lamb, Inc. Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7228901B2 (en) 1994-10-14 2007-06-12 Weatherford/Lamb, Inc. Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7108084B2 (en) 1994-10-14 2006-09-19 Weatherford/Lamb, Inc. Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US6868906B1 (en) 1994-10-14 2005-03-22 Weatherford/Lamb, Inc. Closed-loop conveyance systems for well servicing
US7013997B2 (en) 1994-10-14 2006-03-21 Weatherford/Lamb, Inc. Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US6827145B2 (en) 1997-01-29 2004-12-07 Weatherford/Lamb, Inc. Methods and apparatus for severing nested strings of tubulars
GB2321634A (en) * 1997-01-29 1998-08-05 Weatherford Lamb Tong positioning apparatus
US6536520B1 (en) 2000-04-17 2003-03-25 Weatherford/Lamb, Inc. Top drive casing system
US6742596B2 (en) 2001-05-17 2004-06-01 Weatherford/Lamb, Inc. Apparatus and methods for tubular makeup interlock
GB9718543D0 (en) 1997-09-02 1997-11-05 Weatherford Lamb Method and apparatus for aligning tubulars
US7509722B2 (en) 1997-09-02 2009-03-31 Weatherford/Lamb, Inc. Positioning and spinning device
GB9815809D0 (en) 1998-07-22 1998-09-16 Appleton Robert P Casing running tool
GB2340859A (en) 1998-08-24 2000-03-01 Weatherford Lamb Method and apparatus for facilitating the connection of tubulars using a top drive
GB2340857A (en) 1998-08-24 2000-03-01 Weatherford Lamb An apparatus for facilitating the connection of tubulars and alignment with a top drive
GB2340858A (en) 1998-08-24 2000-03-01 Weatherford Lamb Methods and apparatus for facilitating the connection of tubulars using a top drive
DE69926802D1 (de) 1998-12-22 2005-09-22 Weatherford Lamb Verfahren und vorrichtung zum profilieren und verbinden von rohren
US7188687B2 (en) 1998-12-22 2007-03-13 Weatherford/Lamb, Inc. Downhole filter
GB2345074A (en) 1998-12-24 2000-06-28 Weatherford Lamb Floating joint to facilitate the connection of tubulars using a top drive
GB2347441B (en) 1998-12-24 2003-03-05 Weatherford Lamb Apparatus and method for facilitating the connection of tubulars using a top drive
US6896075B2 (en) 2002-10-11 2005-05-24 Weatherford/Lamb, Inc. Apparatus and methods for drilling with casing
US7311148B2 (en) 1999-02-25 2007-12-25 Weatherford/Lamb, Inc. Methods and apparatus for wellbore construction and completion
US6857487B2 (en) 2002-12-30 2005-02-22 Weatherford/Lamb, Inc. Drilling with concentric strings of casing
AU776634B2 (en) 1999-12-22 2004-09-16 Weatherford Technology Holdings, Llc Drilling bit for drilling while running casing
US7334650B2 (en) 2000-04-13 2008-02-26 Weatherford/Lamb, Inc. Apparatus and methods for drilling a wellbore using casing
US7325610B2 (en) 2000-04-17 2008-02-05 Weatherford/Lamb, Inc. Methods and apparatus for handling and drilling with tubulars or casing
GB0010378D0 (en) 2000-04-28 2000-06-14 Bbl Downhole Tools Ltd Expandable apparatus for drift and reaming a borehole
GB2365463B (en) 2000-08-01 2005-02-16 Renovus Ltd Drilling method
GB0206227D0 (en) 2002-03-16 2002-05-01 Weatherford Lamb Bore-lining and drilling
US6994176B2 (en) 2002-07-29 2006-02-07 Weatherford/Lamb, Inc. Adjustable rotating guides for spider or elevator
US6899186B2 (en) 2002-12-13 2005-05-31 Weatherford/Lamb, Inc. Apparatus and method of drilling with casing
US7730965B2 (en) 2002-12-13 2010-06-08 Weatherford/Lamb, Inc. Retractable joint and cementing shoe for use in completing a wellbore
US7303022B2 (en) 2002-10-11 2007-12-04 Weatherford/Lamb, Inc. Wired casing
US6953096B2 (en) 2002-12-31 2005-10-11 Weatherford/Lamb, Inc. Expandable bit with secondary release device
US7128154B2 (en) 2003-01-30 2006-10-31 Weatherford/Lamb, Inc. Single-direction cementing plug
USRE42877E1 (en) 2003-02-07 2011-11-01 Weatherford/Lamb, Inc. Methods and apparatus for wellbore construction and completion
CA2516649C (en) 2003-02-27 2010-01-19 Weatherford/Lamb, Inc. Drill shoe
GB2428059B (en) 2003-03-05 2007-10-10 Weatherford Lamb Method and apparatus for drilling with casing
US7503397B2 (en) 2004-07-30 2009-03-17 Weatherford/Lamb, Inc. Apparatus and methods of setting and retrieving casing with drilling latch and bottom hole assembly
CA2683763C (en) 2003-03-05 2013-01-29 Weatherford/Lamb, Inc. Full bore lined wellbores
GB2415722B (en) 2003-03-05 2007-12-05 Weatherford Lamb Casing running and drilling system
US7370707B2 (en) 2003-04-04 2008-05-13 Weatherford/Lamb, Inc. Method and apparatus for handling wellbore tubulars
US7650944B1 (en) 2003-07-11 2010-01-26 Weatherford/Lamb, Inc. Vessel for well intervention
US7264067B2 (en) 2003-10-03 2007-09-04 Weatherford/Lamb, Inc. Method of drilling and completing multiple wellbores inside a single caisson
US7284617B2 (en) 2004-05-20 2007-10-23 Weatherford/Lamb, Inc. Casing running head

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BE513349A (enrdf_load_stackoverflow) *
DE563501C (de) * 1932-11-05 Maschf Augsburg Nuernberg Ag Wippkranantrieb
GB402344A (en) * 1933-05-12 1933-11-30 William Hugh Watkins Improvements in or relating to self-stabilising jib-cranes
US2631737A (en) * 1945-11-17 1953-03-17 Cullen Friestedt Company Highway crane
US2761569A (en) * 1952-06-06 1956-09-04 Lavern R Iserman Remote control unit for a truckmounted crane
US2781134A (en) * 1953-06-09 1957-02-12 Lee D Weir Apparatus for controlling truck operation from crane cab
GB822256A (en) * 1957-02-05 1959-10-21 Warner Swasey Co Material handling and earth moving apparatus
FR1403011A (fr) * 1964-04-28 1965-06-18 Richier Sa Perfectionnement aux grues automobiles
US3300069A (en) * 1965-03-18 1967-01-24 Warner Swasey Co Earth moving material handling machine
FR1489224A (fr) * 1966-06-10 1967-07-21 Richier Sa Grue à poste de conduite mobile
US3481489A (en) * 1967-12-05 1969-12-02 Robert E Stauffer Means for extending and retracting boom sections of a crane

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Publication number Priority date Publication date Assignee Title
BE513349A (enrdf_load_stackoverflow) *
DE563501C (de) * 1932-11-05 Maschf Augsburg Nuernberg Ag Wippkranantrieb
GB402344A (en) * 1933-05-12 1933-11-30 William Hugh Watkins Improvements in or relating to self-stabilising jib-cranes
US2631737A (en) * 1945-11-17 1953-03-17 Cullen Friestedt Company Highway crane
US2761569A (en) * 1952-06-06 1956-09-04 Lavern R Iserman Remote control unit for a truckmounted crane
US2781134A (en) * 1953-06-09 1957-02-12 Lee D Weir Apparatus for controlling truck operation from crane cab
GB822256A (en) * 1957-02-05 1959-10-21 Warner Swasey Co Material handling and earth moving apparatus
FR1403011A (fr) * 1964-04-28 1965-06-18 Richier Sa Perfectionnement aux grues automobiles
US3300069A (en) * 1965-03-18 1967-01-24 Warner Swasey Co Earth moving material handling machine
FR1489224A (fr) * 1966-06-10 1967-07-21 Richier Sa Grue à poste de conduite mobile
US3481489A (en) * 1967-12-05 1969-12-02 Robert E Stauffer Means for extending and retracting boom sections of a crane

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2544525A1 (de) * 1974-10-05 1976-05-06 Coles Cranes Ltd Fahrbarer kran
US4664585A (en) * 1984-04-26 1987-05-12 Ambridge Richard J Towing vehicle
US4728249A (en) * 1985-12-11 1988-03-01 The Gradall Company Telescoping boom assembly with longitudinally displaceable base boom section
US4988009A (en) * 1988-05-12 1991-01-29 Grove Coles Limited Telescopic boom mobile cranes
US6098823A (en) * 1998-02-27 2000-08-08 Jlg Industries, Inc. Stabilizing arrangements in and for load-bearing apparatus
US6409457B1 (en) * 1999-10-15 2002-06-25 George Korycan Work vehicle
US20140299563A1 (en) * 2011-11-21 2014-10-09 Wolffkran Holding Ag Counterweight fixing device
US9457997B2 (en) * 2011-11-21 2016-10-04 Wolffkran Holding Ag Counterweight fixing device
US20240175285A1 (en) * 2022-11-29 2024-05-30 Zero Climb Tower Company, LLC Tilt tower with adjustable counterweight system

Also Published As

Publication number Publication date
FR2053088B1 (enrdf_load_stackoverflow) 1974-03-01
DE1937349B2 (de) 1973-08-23
PL73308B2 (enrdf_load_stackoverflow) 1974-08-31
DE1937349A1 (de) 1971-02-04
GB1312126A (en) 1973-04-04
ZA704960B (en) 1971-04-28
BE753800A (fr) 1970-12-31
FR2053088A1 (enrdf_load_stackoverflow) 1971-04-16

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