US3873133A - Clamshell bucket assembly for hydraulic excavator - Google Patents

Clamshell bucket assembly for hydraulic excavator Download PDF

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Publication number
US3873133A
US3873133A US283818A US28381872A US3873133A US 3873133 A US3873133 A US 3873133A US 283818 A US283818 A US 283818A US 28381872 A US28381872 A US 28381872A US 3873133 A US3873133 A US 3873133A
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US
United States
Prior art keywords
passage
tubular member
bucket
tubular
shaft
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
US283818A
Other languages
English (en)
Inventor
Lawrance F Berg
Theodore B Hogg
Robert W Lichti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Priority to US283818A priority Critical patent/US3873133A/en
Priority to CA176,720A priority patent/CA993472A/en
Priority to JP48082788A priority patent/JPS4958609A/ja
Priority to BR6367/73A priority patent/BR7306367D0/pt
Priority to BE134781A priority patent/BE803836A/xx
Priority to GB4023873A priority patent/GB1448841A/en
Priority to GB726276A priority patent/GB1448843A/en
Priority to DE2343558A priority patent/DE2343558C2/de
Priority to FR7330759A priority patent/FR2197093B1/fr
Priority to GB726476A priority patent/GB1448842A/en
Priority to US456241A priority patent/US3917322A/en
Priority to US456246A priority patent/US3914886A/en
Application granted granted Critical
Publication of US3873133A publication Critical patent/US3873133A/en
Assigned to CATERPILLAR INC., A CORP. OF DE. reassignment CATERPILLAR INC., A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CATERPILLAR TRACTOR CO., A CORP. OF CALIF.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L39/00—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies
    • F16L39/04—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies allowing adjustment or movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
    • B66C3/14—Grabs opened or closed by driving motors thereon
    • B66C3/16—Grabs opened or closed by driving motors thereon by fluid motors
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3677—Devices to connect tools to arms, booms or the like allowing movement, e.g. rotation or translation, of the tool around or along another axis as the movement implied by the boom or arms, e.g. for tilting buckets
    • E02F3/3681—Rotators
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
    • E02F3/413—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device
    • E02F3/4135—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device with grabs mounted directly on a boom

Definitions

  • An excavating machine has a stick arm to which is connected a bucket assembly.
  • the bucket assembly has a bucket which is openable and closable by means of fluid pressure applied to one and the other end of a cylinder.
  • the assembly includes a joint which allows free rotation of the bucket through 360 relative to the stick arm, meanwhile providing that the fluid pressure may pass through the joint to one or the other side of the cylinder, irrespective of the rotative position of the bucket.
  • Fluid pressure is supplied to the joint through hose couplings which themselves allow a degree of pivoting of the hose ends relative to the joint.
  • a valving system is included for providing rapid opening of the bucket, and stops are associated with the bucket to limit the opening movement thereof.
  • a cushion stop is provided to cushion the movement of the bucket assembly toward the stick arm.
  • This invention relates to bucket assemblies, and more particularly, to a bucket assembly which is freely pivotable through 360.
  • U.S. Pat. Nos. 3,413,029 to Donovan and 3,451,150 to Pitaval do provide means where such hoses do not interfere with such pivoting.
  • the means provided being positioned adjacent the cylinder area of the apparatus, are not conveniently associated with the cylinders provided, but must communicate therewith through a plurality of hoses.
  • the device of Pitaval depends on pivoting of the piston within a cylinder, with the sealing problems attendant thereto.
  • positive stop means associated only with the jaws of the bucket for determining the fully opened position would be advantageous. This would protect from damage the cylinder structure and linkages used for opening and closing the jaws. In combination with the quick'opening feature, such stop means for determining the fully opened position would come into play quite suddenly, providing the advantage of aiding in the cleaning of the jaws upon such opening thereof.
  • a joint assembly comprising a tubular member generally fixed in posi tion and defining a longitudinal bore and a lateral tubu lar member passage through the body thereof.
  • a longitudinal shaft is disposed within the bore of the tubular member with the outer surface thereof in intimate relation with the inner surface of the tubular member, and rotatable about its longitudinal axis within the tubular member, and defining through the shaft body a shaft passage.
  • An annular passage is defined between the inner surface of the tubular member and the outer surface of the shaft, providing continuous communication therethrough of the tubular member passage and the shaft passage, irrespective of the rotative position of the shaft relative to the tubular member.
  • a hose defining an internal passage
  • a coupling interconnecting the hose end and the tubular member, said coupling comprising means for providing a degree of movement of the hose end relative to the tubular member, meanwhile providing continuous communication of the hose internal passage with the tubular member passage.
  • valve means are included for selectively applying fluid pressure from the source to the one end of the cylinder.
  • Valve means are provided for directing fluid pressure from the source to the other end of the cylinder, the valve means cutting off fluid pressure to the other end of the cylinder upon application of fluid pressure to the one of the cylinder at substantially the same time as such application of fluid pressure to the one end of the cylinder, and allowing communication between the other end of the cylinder and the one end of the cylinder so that the fluid flow from the other end of the cylinder aids the fluid flow directed to the one end of the cylinder.
  • stop means are associated with the jaws, said stop means comprising a pair of stop members, one associated with each jaw, the stop members being positioned to contact each other to limit the opening movementof the jaws.
  • cushion stop means are associated with the arm and means pivotally attached to the arm for limiting the pivoting of the means pivotally attached to the arm in the direction of the arm.
  • FIG. 1 is a side elevational view of a hydraulic excavating machine with the clamshell bucket assembly attached to the end of a stick arm;
  • FIG. 2 is an enlarged side elevational view of the clamshell bucket assembly with the bucket in the closed position
  • FIG. 3 is an enlarged front elevational view of the clamshell bucket assembly
  • FIG. 4 is an enlarged side elevational view of the clamshell bucket assembly with the bucket in a fully opened position
  • FIG. 5 is an enlarged side view, partially-in section, of the upper portion of the clamshell bucket assembly, and showing the hydraulic change valve and details of the swivel joint;
  • FIG. 6 is a cross-sectional view of the swivel joint taken along the line VIVI of FIG. 5;
  • FIG. 7 is a cross-sectional side view of the swivel joint and the outer portion of the hydraulic cylinder and further showing the hydraulic change valve;
  • FIG. 8 is a cross-sectional view of the hydraulic quick change valve taken along the line VlIlVlII of FIG. 7.
  • a clamshell bucket assembly designated generally by the reference numeral 10 is shown attached to the end of a stick arm 12 of an excavating machine 14.
  • the stick arm 12 is fastened to the end of a boom 16, and the movement of the stick arm 12 is controlled by a hydraulic cylinder 18 carried on boom 16. Movement of the boom 16 is controlled by a pair of hydraulic cylinders, one of which is shown at 20.
  • the assembly is shown in larger detail in FIGS. 2-4.
  • Such assembly 10 includes a trunnion support as- 4 sembly 22, a swivel-joint assembly 24, a hydraulic cylinder 26, and an implement, bucket 28.
  • 'Trunnion assembly 22 is pivotally fastened to stick arm 12 by means of pin 30, and the swivel joint assembly 24 is pivotally mounted to trunnion assembly 22 by means of pin and plate assemblies 32, 34 which fasten to the swivel joint assembly 24 by means of a plurality of capscrews 36.
  • the pivotal planes determined by pin 30, and pin and plate assemblies 32, 34, it should be noticed, are perpendicular.
  • the particular construction of pin and plate assemblies 32, 34 can be seen in FIGS. 5 and 6.
  • the swivel joint assembly 24 is shown in detail in FIGS. 5, 6 and 7.
  • pin and plate assemblies 32, 34 support a fixed joint frame 38
  • a longitudinal shaft 40 is disposed within the frame 38, the upper end of the shaft 40 having a stepped portion 42 on which is fixed, by means of nut 44, a support plate 45 and a sprocket 46.
  • the frame 38 defines an annular shoulder 48 which is adapted to position the shaft 40 and support the entire weight of the shaft 40.
  • a tubular member 50 Disposed within the'frame 38 is a tubular member 50, which defines a longitudinal bore 52.
  • the shaft 40 is disposed within the bore 52 of the tubular member 50 with the outer surface thereof in intimate relation with the inner surface of the tubular member 50.
  • the shaft 40 is rotatable about its longitudinal axis within the tubular member 50.
  • the frame 38 is disposed on either end of the tubular member50 in spaced relation with said ends.
  • the rotative movement of the tubular member 50 about its axis relative to the frame 38 is limited by means shown in FIG. 6.
  • a pair of external longitudinal ears 54, 56 are defined by the tubular member 50, parallel to the longitudinal axis of the shaft 40, and an internal longitudinal rib 58 is defined by the frame 38, parallel to the longitudinal axis of the shaft 40, and disposed between the ears 54, 56.
  • tubular member 50 is allowed a degree of movement along the longitudinal axis of the shaft 40 and relative to the shaft 40, but the rotative movement of the tubular member50 about its axis relative to the frame 38 is limited by ears 54, 56 and rib 58.
  • tubular member 50 is generally fixed in position relative to the frame 38. It will also be seen that with tubular member 50 being free floating, none of the weight of the shaft 40 or any of the weight fixed to shaft 40 is supported by tubular member 50, but is totally supported, as described above, by frame 38.
  • tubular member 50 defines lateral passages 60, 62 through the body thereof, and shaft 40 defines shaft passages 64, 66.
  • Annular passages 68 are each defined between the inner surface of the tubular member 50 and the outer surface of the shaft 40.
  • Passages 68, 70 are disposed in planes generally perpendicular to the longitudinal axis of the shaft 40
  • Passage 68 is made up of (i) annular channel 72 formed in the inner surface of the tubular member 50, and (ii) annular channel 74 formed in the outer surface of the shaft 40.
  • passage 70 is made up of (i) annular channel 76 formed in the inner surface of the tubular member 50, and (ii) annular channel 78 formed in the outer surface of shaft 40.
  • Passage 60 communicates with channel 72, and passage 66 communicates with channel 74, so that communication is provided between passages 60, 66 through annular passage 68.
  • passage 62 communicates with channel 76
  • passage 64 communicates with channel 78, so that communication is provided between passages 62, 64 through annular passage 70. It will be seen that such communication between passages 62, 64, and between passages 60, 66, is provided continuously, irrespecive of the rotative position of the shaft 40 relative to the tubular member 50.
  • Cross tubes 90, 92 extend across the jaws, 86, 88 respectively, and are fixed thereto (FIGS. 2 and 3).
  • Link 82 extends downwardly from the top of cylinder 26 to end in bracket portions 94, 96.
  • Bracket portion 94 is disposed between a pair of brackets 98, 100 welded to cross tube 90, and is held there by a pin 102.
  • Bracket portion 96 is disposed between a pair of brackets 104, 106 welded to cross tube 90, and is held there by a pin 108.
  • a pin 110 passes through eye member 112 of piston rod 114 of cylinder 26, and through brackets 98,
  • End brackets 116, 118 are fixed to cross tube 90 adjacent its ends, and pin assemblies 120, 122 fasten end brackets 116, 118 to jaw 86.
  • pin assemblies 120, 122 fasten end brackets 116, 118 to jaw 86.
  • Like brackets are provided on cross tube 92 of jaw 88 and are similarly associated with the piston rod 114 of the cylinder 26.
  • End brackets 124, 126 are fixed to cross tube 92 adjacent its ends and are pinned to end brackets 116, 118 respectively by means of pin assemblies 120, 122.
  • Hoses 130, 132 are associated with the tubular member 50, as best shown in FIGS. 6 and 8.
  • the hoses 130, 132 each define an internal passage, and are associated with the tubular member by coupling means 134, 136. Since the coupling means 134, 136 of hoses 130, 132 are identical, only one will be described in detail.
  • a bolt 138 is threadably connected to tubular member 50 and defines a longitudinal internal passage 140 which communicates with passage 62 of tubular member 50.
  • a tubular coupling body 142 is disposed about the bolt 138 with the inner surface of the body 142 in intimate relation with the outer surface of'the bolt 138.
  • a tubular body 142 defines a lateral body passage 144, the hose 130 end being fixed to the tubular body 142 to provide communication between the internal passage of the hose 13.0 and the tubular body passage 144.
  • An annular open path 146 is defined between the inner surface of the tubular'body 142 and the other surface of the bolt 138, providing continuous communication therethrough of the tubular coupling body passage 144 and bolt passage 140, through a plurality of radial bolt passages 148.
  • Such annular path 146 comprises an annular groove 150 formed in the inner surface of the tubular body 142.
  • Passage 66 communicates directly with a passage in the head of cylinder 26 (FIG. 7), whereby passage 66 communicates directly with the head end of the cylinder 26.
  • passage 64 communicates with a passage 162 in the body of the cylinder 26, which in turn communicates with valve means 164, which will now be described in detail.
  • the valve means 164 are fixed to the head end of the cylinder 26, as shown in FIG. 7.
  • the valve means 164 comprise a valving body 166 and a valving spool 168 associated therewith (FIG. 8).
  • the valving body 166 defines a passage 170 which communicates with passage 162 and leads to valving spool 168.
  • the valving spool 168 is shown in its first position in FIG.
  • pressure sources (not shown) are connected to hoses 130, 132.
  • fluid pressure is applied to hose 130, through passages 62, 70, 64, 162, 170 and into hose 172, to act on the rod end of cylinder 26.
  • Valving spool 168 being biased into the position shown in FIG. 8, allows such communication, but blocks off passage 176 from this pressure.
  • Such pressure on the rod end of cylinder 26 raises the piston rod 114, closing the jaws 86, 88 as pre viously described.
  • fluid pressure is applied to hose 132, through passages 60, 68, 66, 160 to the head end of the cylinder 26.
  • the fluid pressure in the head end of cylinder 26 is also present in passage 178, and passage 176 of valve means 164.
  • Such pressure is transferred into a pilot pressure chamber 181 by means of a pilot pressure passage 182 in valving spool 168, to shift the valving spool 168 rightward against the force of spring 180, closing off communication between pipe 172 and passage 170, and allowing communication between pipe 172 and passage 176, i.e., between the rod end of cylinder 26 and the head end thereof.
  • the spring 180 will shift the valving spool 168 back to its rest position as soon as pressure in the head end of cylinder 26 and passages 176 and 178 is relieved. Since the valving means 164 are connected directly to the top portion of cylinder 26, response to the increased volume of fluid into the cylinder 26 is extremely rapid and no additional lines or hoses are needed.
  • stop means comprising stop members 200, 202 are associated with jaws 86, 88, respectively. Stop members 200, 202 are positioned to contact each other to limit the opening movement of the jaws 86, 88 (FIG. 4).
  • the stop members 200, 202 actually comprise extended portions of jaws 86, 88 respectively, with end portions that define flat surfaces 204, 206 which contact each other across the full flat surface of each to limit opening movement of the jaws 86, 88.
  • Such positive stop means serve also to protect the links 82, 84 and cylinder 26 and piston rod 114 thereof, since there is no danger of the jaws 86, 88 contacting them upon the sudden opening of the jaws 86, 88.
  • Such positive stop means have the additional advantage that, in combination with the quick opening provided by the valve means 164, the sudden positive stop of the opening jaws 86, 88 acts to clean the jaws 86, 88, resulting in more efficient use.
  • a cushioned stop 210 is fixed to the trunnion support assembly 22, as best shown in FIGS. 2, 4 and 5.
  • the cushioned stop 210 is positioned to contact the stick arm 12 if the bucket assembly should pendulate in a wide arc toward the stick arm 12 (FIG. 2). In such situations, the cushioned stop 210 would absorb the force of the bucket assembly 10, and prevent it from striking the stick arm 12.
  • an optional bucket rotating assembly 220 is shown for providing powered rotation of the bucket assembly 10.
  • the powered rotating assembly 220 includes a hydraulic motor 222, sprocket 46, and a chain 224.
  • a sprocket 226 secured to the shaft 228 of the hydraulic motor 222 drives the chain 224 and thereby rotates the sprocket 46.
  • the sprocket 46 is secured to the stepped portion 42 of shaft 40 by a key 230. It can be seen therefore that rotation of the sprocket 46 by the chain 224 will cause shaft 40 of the swivel joint assembly 24 to rotate also.
  • the entire bucket assembly 10 below the joint frame 38 rotates with shaft 40. Even without the powered rotating assembly 220, the entire bucket assembly 10 can be rotated by hand in view of the construction of the swivel joint assembly 24.
  • a joint assembly comprising: a tubular member generally fixed in position and defining a longitudinal bore and a lateraltubular member passage through the body thereof; a longitudinal shaft disposed within the bore of the tubular member with the outer surface thereof in intimate relation with the inner surface of the tubular member and rotatable about its longitudinal axis within the tubular member, and defining through the shaft body a shaft passage; and, an annular passage defined between the inner surface of the tubular member and the outer surface of the shaft, providing continuous communication therethrough of the tubular member passage and the shaft passage, irrespective of the rotative postion of the shaft relative to the tubular member, wherein is further included a hose defining an internal passage, and a coupling interconnecting the hose end and tubular member, said coupling comprising means for providing a degree of movement of the hose end relative to the tubular member, meanwhile providing continuous communication ofthe hose internal passage with the tubular member passage, wherein the coupling comprises (i) a longitudinal bolt threadably connected to the tubular member and
  • annular open path comprises an annular groove formed in the inner surface of the tubular coupling body.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Joints Allowing Movement (AREA)
US283818A 1972-08-25 1972-08-25 Clamshell bucket assembly for hydraulic excavator Expired - Lifetime US3873133A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
US283818A US3873133A (en) 1972-08-25 1972-08-25 Clamshell bucket assembly for hydraulic excavator
CA176,720A CA993472A (en) 1972-08-25 1973-07-18 Joint assembly for hydraulic excavator
JP48082788A JPS4958609A (ja) 1972-08-25 1973-07-24
BR6367/73A BR7306367D0 (pt) 1972-08-25 1973-08-17 Conjunto de balde de garras para escavadora hidraulica
BE134781A BE803836A (fr) 1972-08-25 1973-08-21 Ensemble de joint, notamment pour godet d'excavateur hydraulique
GB726276A GB1448843A (en) 1972-08-25 1973-08-24 Excavator incorporating a pivotably mounted implement
GB4023873A GB1448841A (en) 1972-08-25 1973-08-24 Joint assemblies
DE2343558A DE2343558C2 (de) 1972-08-25 1973-08-24 Baggergreifer
FR7330759A FR2197093B1 (ja) 1972-08-25 1973-08-24
GB726476A GB1448842A (en) 1972-08-25 1973-08-24 Coupling for a hose
US456241A US3917322A (en) 1972-08-25 1974-03-29 Joint structure for clamshell bucket assembly
US456246A US3914886A (en) 1972-08-25 1974-03-29 Clamshell bucket assembly and valve means associated therewith

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US283818A US3873133A (en) 1972-08-25 1972-08-25 Clamshell bucket assembly for hydraulic excavator

Publications (1)

Publication Number Publication Date
US3873133A true US3873133A (en) 1975-03-25

Family

ID=23087689

Family Applications (1)

Application Number Title Priority Date Filing Date
US283818A Expired - Lifetime US3873133A (en) 1972-08-25 1972-08-25 Clamshell bucket assembly for hydraulic excavator

Country Status (8)

Country Link
US (1) US3873133A (ja)
JP (1) JPS4958609A (ja)
BE (1) BE803836A (ja)
BR (1) BR7306367D0 (ja)
CA (1) CA993472A (ja)
DE (1) DE2343558C2 (ja)
FR (1) FR2197093B1 (ja)
GB (3) GB1448843A (ja)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4921010A (en) * 1988-04-22 1990-05-01 Unex Corporation Swivel connector
US5117741A (en) * 1990-01-16 1992-06-02 Sta-Rite Industries, Inc. Double wall hydraulic cylinder
US6408875B1 (en) * 2000-03-13 2002-06-25 Shin Caterpillar Mitsubishi Ltd. Piping structure of a working machine
US6425730B1 (en) * 1999-02-11 2002-07-30 Clark Equipment Company Load bearing pivot assembly providing a fluid path
WO2003008716A1 (en) * 2001-07-18 2003-01-30 Rotobec Inc. Motor-driven, boom-mounted rotary coupling
US20060101953A1 (en) * 2003-01-30 2006-05-18 Ake Sonerud Tool holder with hydraulic coupling means
US20070248445A1 (en) * 2006-04-25 2007-10-25 Clark Equipment Company Locking device for hydraulic attachment interface
CN103572790A (zh) * 2012-08-07 2014-02-12 上海金泰工程机械有限公司 落点可控式安全冲击抓斗
US20200299928A1 (en) * 2017-12-22 2020-09-24 Kubota Corporation Working machine

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DE2718434C2 (de) * 1977-04-26 1979-06-28 Fa. Johannes Fuchs, 7257 Ditzingen Am Ausleger einer Arbeitsmaschine angelenkter Greifer
DE2838346C2 (de) * 1978-09-02 1985-02-14 Fa. Heinz Thumm, 7012 Fellbach Drehvorrichtung für einen Baggergreifer o.dgl.
DE2856556C2 (de) * 1978-12-28 1980-10-23 Liebherr-Hydraulikbagger Gmbh, 7951 Kirchdorf Werkzeugaufhängung für hydraulisch betätigbare auswechselbare Werkzeuge
DE3105194A1 (de) * 1981-02-13 1982-09-09 Heinz Thumm Ölhydraulische Antriebe GmbH, 7012 Fellbach Drehvorrichtung fuer haengende lasten
FR2536455A1 (fr) * 1982-11-19 1984-05-25 Soletanche Dispositif pour assurer la verticalite d'un engin de perforation
JP5709791B2 (ja) * 2012-04-16 2015-04-30 日立建機株式会社 クラムシェルバケット
DE102015112639B4 (de) * 2015-07-31 2017-05-11 Peiner SMAG Lifting Technologies GmbH Schalengreifer
CN112726695B (zh) * 2021-01-27 2022-08-12 徐州徐工矿业机械有限公司 一种工程机械电子缓冲限位装置

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US2334141A (en) * 1942-03-26 1943-11-09 Frank P Zierden Hose reel
US2343491A (en) * 1942-04-30 1944-03-07 Bard Swivel joint
US2990851A (en) * 1958-06-23 1961-07-04 Mcevoy Co Multiple valve and connection

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US2725996A (en) * 1953-04-22 1955-12-06 Paul F Britton Universal head for controlling clamshell bucket and similar material handling devices
JPS429871Y1 (ja) * 1964-05-13 1967-05-30
US3413029A (en) * 1966-08-01 1968-11-26 Esco Corp Material handling apparatus
FR1508347A (fr) * 1966-11-24 1968-01-05 Poclain Sa Ensemble d'orientation facilement démontable pour benne preneuse d'engin de terrassement
US3462029A (en) * 1968-02-02 1969-08-19 Bucyrus Erie Co Rocker support for bucket attachment
JPS471250U (ja) * 1971-01-18 1972-08-12

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Publication number Priority date Publication date Assignee Title
US2334141A (en) * 1942-03-26 1943-11-09 Frank P Zierden Hose reel
US2343491A (en) * 1942-04-30 1944-03-07 Bard Swivel joint
US2990851A (en) * 1958-06-23 1961-07-04 Mcevoy Co Multiple valve and connection

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4921010A (en) * 1988-04-22 1990-05-01 Unex Corporation Swivel connector
US5117741A (en) * 1990-01-16 1992-06-02 Sta-Rite Industries, Inc. Double wall hydraulic cylinder
US6425730B1 (en) * 1999-02-11 2002-07-30 Clark Equipment Company Load bearing pivot assembly providing a fluid path
US6408875B1 (en) * 2000-03-13 2002-06-25 Shin Caterpillar Mitsubishi Ltd. Piping structure of a working machine
US7066076B2 (en) 2001-07-18 2006-06-27 Rotobec Inc. Motor-driven, boom-mounted rotary coupling
WO2003008716A1 (en) * 2001-07-18 2003-01-30 Rotobec Inc. Motor-driven, boom-mounted rotary coupling
US20040168568A1 (en) * 2001-07-18 2004-09-02 Michel Roy Motor-driven, boom-mounted rotary coupling
US20060101953A1 (en) * 2003-01-30 2006-05-18 Ake Sonerud Tool holder with hydraulic coupling means
US7654787B2 (en) * 2003-01-30 2010-02-02 Oilquick Ab Tool holder with hydraulic coupling means
US20070248445A1 (en) * 2006-04-25 2007-10-25 Clark Equipment Company Locking device for hydraulic attachment interface
US7690880B2 (en) 2006-04-25 2010-04-06 Clark Equipment Company Locking device for hydraulic attachment interface
CN103572790A (zh) * 2012-08-07 2014-02-12 上海金泰工程机械有限公司 落点可控式安全冲击抓斗
CN103572790B (zh) * 2012-08-07 2016-08-03 上海金泰工程机械有限公司 落点可控式安全冲击抓斗
US20200299928A1 (en) * 2017-12-22 2020-09-24 Kubota Corporation Working machine
US11982068B2 (en) * 2017-12-22 2024-05-14 Kubota Corporation Working machine

Also Published As

Publication number Publication date
DE2343558C2 (de) 1982-08-12
BE803836A (fr) 1974-02-21
GB1448842A (en) 1976-09-08
CA993472A (en) 1976-07-20
DE2343558A1 (de) 1974-02-28
FR2197093A1 (ja) 1974-03-22
BR7306367D0 (pt) 1974-07-25
GB1448841A (en) 1976-09-08
FR2197093B1 (ja) 1978-11-10
GB1448843A (en) 1976-09-08
JPS4958609A (ja) 1974-06-06

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Effective date: 19860515