US3469712A - Telescopic boom crane - Google Patents

Telescopic boom crane Download PDF

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Publication number
US3469712A
US3469712A US703042A US3469712DA US3469712A US 3469712 A US3469712 A US 3469712A US 703042 A US703042 A US 703042A US 3469712D A US3469712D A US 3469712DA US 3469712 A US3469712 A US 3469712A
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United States
Prior art keywords
boom
telescopic
cable
casing
intermediate member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US703042A
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English (en)
Inventor
Arthur Haulotte
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Individual
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Individual
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Publication date
Priority claimed from FR94478A external-priority patent/FR92822E/fr
Priority claimed from FR131904A external-priority patent/FR94010E/fr
Application filed by Individual filed Critical Individual
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Publication of US3469712A publication Critical patent/US3469712A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/703—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by flexible elements, e.g. cables, chains or bands

Definitions

  • R lllllll ll Illlll R iitwittitm Hw Hww HHH. o 90 o. W m v ll H lll wk l1! 7 MN QNN w i QR 3mm & 7 mm MN m d p 0, 969 A. HAULOTTE TELESCOPIC BOOM CRANE Sheets-Sheet 4.
  • the present invention relates to cranes of the type in which the telescopic boom is constituted by a number of tubular members of decreasing cross-section which are slidably mounted within each other, and in which the outer member constitutes a boom casing which is pivotally mounted on a horizontal axis carried by the frame of the crane, whilst the inner member carries at its front extremity the guide pulley which supports the liftinghook cable, the outward travel and withdrawal of at least the inner member of the boom being carried out by means of a system of endless flexible ties (cables or chains), one point of which is attached to said inner member and which passes over two pulleys mounted respectively at the two extremities of the second member located immediately around the inner member, another point of said endless tie being attached to the third member which surrounds the second member.
  • endless flexible ties cables or chains
  • One object of the invention is to provide a crane of this type in which the inner sliding member of the telescopic boom which has the lowest strength is not subjected to bending stresses when the boom is not extended to its maximum reach.
  • the endless operating cable or chain of the inner member of the boom is connected to the third member of the boom by removable fastening means whereby said cable can be selectively connected either to said third member or to said second member.
  • a further object of the invention is to provide a crane of the above-mentioned type in which the cable which serves to operate the intermediate member of the boom relative to the boom casing is of minimum length and is not required to pass over pulleys.
  • a cable or chain which is attached at both extremities respectively to the two extremities of the intermediate member is passed over a driving winch carried by the outer member or boom casing.
  • a further object of the invention is to provide a crane of the type aforesaid which comprises safety means adapted to prevent one of the telescopic members of the boom from moving back abruptly under the action of gravity in the event that the flexible tie which operates said member were to break.
  • the flexible tie which operates an inner telescopic member is attached to the rear end of said member by means of a safety component which is adapted to move on said member and provided with a tooth which is capable of engaging under the action of gravity and/or of a spring with teeth or aligned slots of the telescopic member in which the telescopic member considered is slidably mounted when tractive force is no longer exerted by said tie.
  • a further object of the invention is to provide a crane of the above-mentioned type in which the lifting hook carried by the cable which is suspended from the extremity of the boom is maintained at the same level even during the movements of outward travel or of withdrawal of the telescopic boom.
  • the lifting cable is guided between'the extremity thereof which is wound on the stationary winch and the opposite extremity thereof over guide members disposed in such a manner that the sum of variations in length of the sections of the lifting cable between its two extremities as produced by the displacement of the telescopic members of the boom relative to the stationary member or boom casing on the one hand and relative to each other on the other hand is equal to zero.
  • FIG. 1 is a longitudinal vertical sectional view of the complete boom of a telescopic crane which is endowed with the two first features mentioned above;
  • FIG. 2 shows one embodiment of the safety system which has also been referred to in the foregoing
  • FIG. 3 is a longitudinal sectional view of a telescopic boom for a crane illustrating an alternate embodiment to the one shown in FIG. 1;
  • FIG. 4 is a longitudinal section view of a telescopic boom for a crane illustrating still another arrangement of attaching the lifting cable to the boom;
  • FIG. 5 is a perspective view of a telescopic boom for a crane and the control arrangement for operating the boom which embodies the present invention and illustrates a further embodiment of the attachment of the lifting cable to the boom.
  • the telescopic crane boom which is illustrated in FIG. 1 comprises three telescopic members which are capable of sliding relative to each other, namely: an inner member, an intermediate member and an outer member or boom casing 3.
  • the boom casing 3 is adapted to pivot on a pin 2 carried by a frame 1 and the angle of inclination of said casing is set by means of a jack 41.
  • the cable 38 which is fitted with a load-lifting hook is passed over an idler pulley 41 mounted on a shaft 42 which is fixed in the front extremity of the inner tubular member 9 of the boom.
  • the system which serves to control the sliding motion of the intermediate member 8 within the boom casing 3 comprises a flexible tie 51 such as a cable or a chain which is attached at both ends respectively to two lugs 52, 53, said lugs being rigidly fixed to the two extremities of the intermediate tubular member 8.
  • Said tie 51 which is a chain in the exemplified embodiment, is passed over a sprocket 55 carried by the output shaft 56 of an electric reduction-gear motor which is generally designated by the reference 57 and mounted on the top of the front portion of the boom casing 3.
  • Two rollers 58, 59 serve to maintain the chain 51 in closely meshing relation with the driving sprocket 55.
  • a recess 62 which is formed in the top wall of the boom casing 3 makes it possible for the drive chain 51 to pass from the interior of the boom casing inasmuch as it is fixed to the intermediate member 8 to the exterior of said casing in which the reduction-gear drive unit 57 is located.
  • One of the ends of the chain is attached to the intermediate member, for example to the lug 53, by means of a springloaded system 63 which always maintains the chain under correct tension in spite of the small elongations to which said chain is liable to be subjected in service.
  • the chain 51 is caused to run along the boom casing, either in the direction of outward travel of the intermediate member 8 or in the direction of withdrawal of this latter.
  • the reduction-gear motor 57 is another position on the boom casing, for example on a lateral face of this latter or on the underface.
  • the movement of displacement of the inner member 9 with respect to the intermediate member 8 of the boom is controlled by means of an endless cable or chain 21 which is passed over two idler pulleys 22, 23 carried by pins 24, 25 which are mounted respectively at the two extremities of said intermediate member 8.
  • One of the lengths of the cable is passed between the boom casing and said intermediate member, whilst the other length is passed between the intermediate member and the inner member 9.
  • One point of the cable 21 is attached at 28 to the inner member 9 of the boom whilst another point of said cable is attached at 27 to the front extremity of the boom casin 3.
  • the inner member 9 is automatically caused to move at the same speed with respect to the intermediate member 8 and consequently at twice the speed with respect to the boom casing 3.
  • the front portion of the inner member 9 automatically overhangs beyond the front end of the intermediate member 8 to the same extent as the front end of said intermediate member 8 overhangs beyond the front end of the boom casing 3.
  • the inner member 9 of the boom is subjected to higher working stress than the intermediate member 8 which is necessarily of larger cross-sectional area inasmuch as it surrounds the inner member 9.
  • the cable 1 is secured to the intermediate member 8, with the result that the inner member 9 of the boom which is attached at 28 to said cable 21 is in turn secured to the intermediate member 8.
  • the intermediate member 8 is extended to any desired distance beyond the boom casing by means of the operating chain system 51, the inner member 9 still remains fully withdrawn inside said intermediate member 8.
  • the sliding portion of the boom is therefore in that case composed of the assembly of both members 8 and 9 which consequently work under bending stress under the best possible conditions, which is highly advantageous when the crane is employed for lifting heavy loads with a small working radius.
  • FIG. 2 there is shown an embodiment of a safety system which is adapted to prevent telescopic members, in this case the member 8, from returning abruptly into the boom casing 3 under the action of gravity, in which case the,cable 51 which operates said member would break.
  • the system under consideration comprises a lever 71 which is pivotally mounted on the bottom edge of the rear end of the telescopic member 8 by means of a horizontal hinge-pin 72.
  • Said lever 71 comprises a long arm 71A which extends upwards and is applied against the top edge of the extremity of said elescopic member 8 under the tractive force exerted by the cable 51 which is attached to the extremity of said arm 71A instead of being attached directly to the member 8 as in the embodiment which is illustrated in FIG. 1.
  • the other arm 71B of the lever 71 forms a tooth which is intended to cooperate with slots 73 formed in the bottom wall of the boom casing 3 within which the telescopic member 8 is slidably mounted, said slots being aligned so that the tooth 71B passes in front of each slot in turn when the telescopic member 8 moves progressively out of the boom casing 3 under the action of the operating cable 51.
  • the cable 51 therefore maintains the extremity of the arm 71A of the pivotal lever 71 applied against the top edge of the rear extremity of the boom casing 8.
  • the lever 71 then performs a pivotal motion under the action of its own weight in the direction of the arrow 1 about its hinge-pin 72, with the result that the tooth 71B comes to rest against the internal face of the bottom wall of the boom casing 3 and that, as soon as the cable breaks, the telescopic member 8 and all the components carried by said member including any load tend to cause said lever to move down again under the action of gravity; but the tooth 71B then engages in the first slot 73 of the boom casing 3 which is encountered and prevents any further dangerous downward motion.
  • said safety system being supported within the member in which the telescopic member considered is directly intended to slide.
  • the boom comprises a stationary boom casing 3, an intermediate telescopic member 8 and an inner telescopic member 9.
  • a winch 70 mounted on a platform 71 which is rigidly fixed to the stationary boom casing 3 serves to operate a lifting cable, the different sections of which are designated by the references 72a, 72b, 72c and 72d, and which is passed over a guide pulley 73 mounted on the stationary boom casing 3, over a pully 74 mounted at the inner extremity of the intermediate telescopic member 8, over a guide pulley 75 mounted at the outer extremity of the inner telescopic member 9, and finally terminates at the lifting hook 76.
  • an operating cable 21 of the telescopic boom 38-9 is passed over two idler pulleys 22, 23 carried by pins 24, 25 which are mounted respectively at the two extremities of the intermediate member 8.
  • One of the lengths of the cable 21 is passed between the boom casing 3 and said intermediate member whilst the other length is passed between this latter and the inner member 9.
  • One point of the cable 21 which has a closed loop configuration is attached at 28 to the inner member 9 whilst another point of the cable can be attached either at 27 to the boom casing 3 or at 27a to the intermediate member 8.
  • FIG. 3 operates as follows:
  • the intermediate telescopic member 8 can be moved out of the stationary boom casing 3 or withdrawn into this latter by producing the movement of rotation of the drive sprocket 55 in the corresponding direction.
  • the operating cable 21 which is coupled to the inner telescopic member 9 at 28, the movement of outward travel of the intermediate member 8 also produces the movement of outward travel of said inner member.
  • Lifting or lowering of the load is accordingly controlled by operation of the winch 70.
  • FIG. 4 in which is shown solely the guiding system of the lifting cable, is concerned with the other possible mode of operation in which the cable 21 (as shown in FIG. 3) is attached at 27a to the intermediate telescopic member 8, with the result that the actuation of the drive sprocket 55 causes the outward displacement of the telescopic members 8 and 9 from the boom casing 3 without modifying the relative positions of said telescopic members.
  • the system described above operates as follows: at the time of actuation of the drive sprocket 55 (shown in FIG. 3) in the corresponding direction, the telescopic members 8 and 9 move out of the stationary boom casing 3 without changing their relative positions.
  • the length of the section 72] which is located between the point of attachment 79 to the stationary boom casing 3 and the guide pulley 78 which is mounted on the inner telescopic member 9 increases by an amount which is equal to the extent of reduction of the section 72b, with the result that the sum of all the sections of the lifting cable remains unchanged, the effect thereby produced being that the lengths of the sections 72d and 72a also remain unchanged.
  • the hook 76 therefore remains at the same level in spite of the displacement of the telescopic members 8 and 9.
  • the lifting hook 76 does not need to be attached directly to the end of the lifting cable as shown in FIG. 3, but use can also be made of a pulley-block rig. This case is illustrated in FIG. 5, in which the hook 76 is attached to a pulley block 80 containing a guide pulley (not shown in the drawings) over which is passed the lifting cable 72, the end of which is thus anchored at 81 to the inner telescopic member 9.
  • a crane comprising a support frame, a horizontal pin mounted on said frame, a telescopic boom formed of a plurality of tubular members comprising an inner member, an intermediate member and an outer member, said intermediate member and inner member having decreasing transverse cross sections relative to said outer member and said tubular members being adapted to slide within one another, said outer member is mounted on said horizontal pin for pivotal movement thereon and forms a boom casing, each of said tubular members having an inner end and an outer end so that in the telescoped position the inner ends are adjacent said horizontal pin and the outer ends are remote from said horizontal pin, a guide pulley aflixed to the outer end of said inner member, a lifting hook, a lifting cable having said lifting hook affixed thereon and passing over said guide pulley, a first connection member located at the inner end of said inner member, a second connection member located at the outer end of said intermediate member, and a third connection member located at the outer end of said outer member, a pair of auxiliary pulleys one attached to the inner end and
  • a crane comprising a support frame, a horizontal pin mounted on said frame, a telescopic boom formed of a plurality of tubular members comprising an inner member, an intermediate member and an outer member, said intermediate member and inner member having decreasing transverse cross sections relative to said outer member and said tubular members being adapted to slide within one another, said outer member is mounted on said horizontal pin for pivotal movement thereon and forms a boom casing, each of said tubular members having an inner end and an outer end so that in the telescoped position the inner ends are adjacent said horizontal pin and the outer ends are remote from said horizontal pin, a guide pulley affixed to the outer end of said inner member, a lifting hook, a lifting cable having said lifting hook aflixed thereon and passing over said guide pulley, a first connection member located at the inner end of said inner member, a second connection member located at the outer end of said intermediate member, and a third connection member located at the outer end of said outer member, a pair of auxiliary pulleys one attached to the inner end and
  • a crane comprising a support frame, a horizontal pin mounted on said frame, a telescopic boom formed of a plurality of tubular members comprising an inner member, an intermediate member and an outer member, said intermediate member and inner member having decreasing transverse cross sections relative to said outer member and said tubular members being adapted to slide within one another, said outer member is mounted on said horizontal pin for pivotal movement thereon and forms a boom casing, each of said tubular members having an inner end and an outer end so that in the telescoped position the inner ends are adjacent said horizontal pin and the outer ends are remote from said horizontal pin, a guide pulley affixed to the outer end of said inner member, a lifting hook, a lifting cable having said lifting hook afiixed thereon and passing over said guide pulley, a first connection member located at the inner end of said inner member, a second connection member located at the outer end of said intermediate member, and a third connection member located at the outer end of said outer member, a pair of auxiliary pulleys one attached to the inner
  • a crane comprising a support frame, a horizontal pin mounted on said frame, a telescopic boom formed of a plurality of tubular members comprising an inner member, an intermediate member and an outer member, said intermediate member and inner member having decreasing transverse cross sections relative to said outer member and said tubular members being adapted to slide within one another, said outer member is mounted on said horizontal pin for pivotal movement thereon and forms a boom casing, each of said tubular members having an inner end and an outer end so that in the telescoped position the inner ends are adjacent said horizontal pin and the outer ends are remote from said horizontal pin, a guide pulley affixed to the outer end of said inner member, a lifting hook, a lifting cable having said lifting hook afiixed thereon and passing over said guide pulley, a first connection member located at the inner end of said inner member, a second connection member located at the outer end of said intermediate member, and a third connection located at the outer end of said outer member, a pair of auxiliary pulleys one attached to the inner end

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
US703042A 1967-02-10 1968-02-05 Telescopic boom crane Expired - Lifetime US3469712A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR94478A FR92822E (fr) 1966-05-11 1967-02-10 Grue a fleche télescopique.
FR131904A FR94010E (fr) 1966-05-11 1967-12-12 Grue a fleche télescopique.

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US3469712A true US3469712A (en) 1969-09-30

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US703042A Expired - Lifetime US3469712A (en) 1967-02-10 1968-02-05 Telescopic boom crane

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US (1) US3469712A (es)
DE (1) DE1556351A1 (es)
ES (1) ES350668A1 (es)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE30021E (en) * 1973-05-21 1979-06-05 Loed Corporation Material handling machine
US4193505A (en) * 1977-03-21 1980-03-18 Jonsereds Ab Arrangement in a hydraulically operated crane
US4363413A (en) * 1979-08-17 1982-12-14 Coles Cranes Limited Endless chain drive for telescopic jib sections
FR2513978A1 (fr) * 1981-10-02 1983-04-08 Coles Cranes Ltd Fleche telescopique et appareil de levage la comportant
FR2591211A1 (fr) * 1985-12-06 1987-06-12 Peugeot Dispositif de chargement et de dechargement pour vehicule automobile
US5324086A (en) * 1991-07-24 1994-06-28 Mordechai Hammer Device capable of positive extension and retraction using a casading force transfer
US20130312224A1 (en) * 2011-06-02 2013-11-28 Happy Captain Pty Ltd Hook
EP2712836A1 (en) * 2012-09-28 2014-04-02 Mesera Cranes Finland Oy A telescopic crane and a telescopic boom arrangement of a telescopic crane
US8899878B2 (en) * 2006-05-18 2014-12-02 Tt Technologies, Inc. Portable winch
US20150239715A1 (en) * 2014-02-26 2015-08-27 Sany America Inc. Nested sheave arrangement for a telescopic boom and applications of same
RU178314U1 (ru) * 2017-09-12 2018-03-29 Федеральное государственное бюджетное образовательное учреждение высшего образования "Санкт-Петербургский государственный архитектурно-строительный университет" Телескопическая стрела
US10406571B2 (en) 2016-03-08 2019-09-10 Alexander G. Innes Mechanical extended reach Sluicer
US10786905B1 (en) 2018-04-16 2020-09-29 AGI Engineering, Inc. Tank excavator
US10864640B1 (en) 2017-12-26 2020-12-15 AGI Engineering, Inc. Articulating arm programmable tank cleaning nozzle
US11031149B1 (en) 2018-02-13 2021-06-08 AGI Engineering, Inc. Nuclear abrasive slurry waste pump with backstop and macerator
US11267024B2 (en) 2018-06-11 2022-03-08 AGI Engineering, Inc. Programmable tank cleaning nozzle
US11311920B2 (en) 2018-06-11 2022-04-26 AGI Engineering, Inc. Programmable railcar tank cleaning system
US11413666B1 (en) 2018-02-13 2022-08-16 AGI Engineering, Inc. Vertical travel robotic tank cleaning system
US11571723B1 (en) 2019-03-29 2023-02-07 AGI Engineering, Inc. Mechanical dry waste excavating end effector
US11577287B1 (en) 2018-04-16 2023-02-14 AGI Engineering, Inc. Large riser extended reach sluicer and tool changer

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4437815C2 (de) * 1994-10-13 1999-11-18 Mannesmann Ag Vorrichtung zum Güterumschlag von Containern
DE102017204566A1 (de) * 2017-03-20 2018-09-20 KB Vorspann-Technik GmbH Seilführung zum beschädigungsfreien Führen eines Seils sowie entsprechendes Verfahren
EP3372744A1 (de) * 2017-03-07 2018-09-12 KB Vorspann-Technik GmbH Seilführung zum beschädigungsfreien führen eines seils sowie entsprechendes verfahren

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2896750A (en) * 1956-04-20 1959-07-28 Jay M Eitel Telescoping assembly
US2919036A (en) * 1956-08-10 1959-12-29 Clifford H Raymond Extensible boom with load level maintenance means
FR1492931A (fr) * 1966-05-11 1967-08-25 Grue à flèche télescopique
US3396601A (en) * 1966-02-16 1968-08-13 Dow Chemical Co Extensible element

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2896750A (en) * 1956-04-20 1959-07-28 Jay M Eitel Telescoping assembly
US2919036A (en) * 1956-08-10 1959-12-29 Clifford H Raymond Extensible boom with load level maintenance means
US3396601A (en) * 1966-02-16 1968-08-13 Dow Chemical Co Extensible element
FR1492931A (fr) * 1966-05-11 1967-08-25 Grue à flèche télescopique

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE30021E (en) * 1973-05-21 1979-06-05 Loed Corporation Material handling machine
US4193505A (en) * 1977-03-21 1980-03-18 Jonsereds Ab Arrangement in a hydraulically operated crane
US4363413A (en) * 1979-08-17 1982-12-14 Coles Cranes Limited Endless chain drive for telescopic jib sections
FR2513978A1 (fr) * 1981-10-02 1983-04-08 Coles Cranes Ltd Fleche telescopique et appareil de levage la comportant
FR2591211A1 (fr) * 1985-12-06 1987-06-12 Peugeot Dispositif de chargement et de dechargement pour vehicule automobile
US5324086A (en) * 1991-07-24 1994-06-28 Mordechai Hammer Device capable of positive extension and retraction using a casading force transfer
US10865081B2 (en) 2006-05-18 2020-12-15 Tt Technologies, Inc. Portable winch
US11441722B2 (en) 2006-05-18 2022-09-13 Tt Technologies, Inc. Portable winch
US8899878B2 (en) * 2006-05-18 2014-12-02 Tt Technologies, Inc. Portable winch
US9731944B2 (en) 2006-05-18 2017-08-15 Tt Technologies, Inc. Portable winch
US10322917B2 (en) 2006-05-18 2019-06-18 Tt Technologies, Inc. Portable winch
US11913588B2 (en) 2006-05-18 2024-02-27 Tt Technologies, Inc. Portable winch
US8991013B2 (en) * 2011-06-02 2015-03-31 Happy Captain Pty Ltd. Extendable handle
US20130312224A1 (en) * 2011-06-02 2013-11-28 Happy Captain Pty Ltd Hook
EP2712836A1 (en) * 2012-09-28 2014-04-02 Mesera Cranes Finland Oy A telescopic crane and a telescopic boom arrangement of a telescopic crane
US20150239715A1 (en) * 2014-02-26 2015-08-27 Sany America Inc. Nested sheave arrangement for a telescopic boom and applications of same
US9527700B2 (en) * 2014-02-26 2016-12-27 Sany America Inc. Nested sheave arrangement for a telescopic boom and applications of same
US10406571B2 (en) 2016-03-08 2019-09-10 Alexander G. Innes Mechanical extended reach Sluicer
RU178314U1 (ru) * 2017-09-12 2018-03-29 Федеральное государственное бюджетное образовательное учреждение высшего образования "Санкт-Петербургский государственный архитектурно-строительный университет" Телескопическая стрела
US10864640B1 (en) 2017-12-26 2020-12-15 AGI Engineering, Inc. Articulating arm programmable tank cleaning nozzle
US11413666B1 (en) 2018-02-13 2022-08-16 AGI Engineering, Inc. Vertical travel robotic tank cleaning system
US11031149B1 (en) 2018-02-13 2021-06-08 AGI Engineering, Inc. Nuclear abrasive slurry waste pump with backstop and macerator
US11577287B1 (en) 2018-04-16 2023-02-14 AGI Engineering, Inc. Large riser extended reach sluicer and tool changer
US10786905B1 (en) 2018-04-16 2020-09-29 AGI Engineering, Inc. Tank excavator
US11267024B2 (en) 2018-06-11 2022-03-08 AGI Engineering, Inc. Programmable tank cleaning nozzle
US11311920B2 (en) 2018-06-11 2022-04-26 AGI Engineering, Inc. Programmable railcar tank cleaning system
US11571723B1 (en) 2019-03-29 2023-02-07 AGI Engineering, Inc. Mechanical dry waste excavating end effector

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Publication number Publication date
DE1556351A1 (de) 1970-01-15
ES350668A1 (es) 1969-05-16

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