US20150322646A1 - A locking mechanism - Google Patents

A locking mechanism Download PDF

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Publication number
US20150322646A1
US20150322646A1 US14/650,858 US201314650858A US2015322646A1 US 20150322646 A1 US20150322646 A1 US 20150322646A1 US 201314650858 A US201314650858 A US 201314650858A US 2015322646 A1 US2015322646 A1 US 2015322646A1
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US
United States
Prior art keywords
locking
locking element
locking mechanism
quick coupler
teeth
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.)
Abandoned
Application number
US14/650,858
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English (en)
Inventor
Andre Richard Anderson
Ashley Craig Gibson
Andrew James Phillip Rider
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.)
Wedgelock Equipment Ltd
Original Assignee
Wedgelock Equipment Ltd
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 Wedgelock Equipment Ltd filed Critical Wedgelock Equipment Ltd
Assigned to WEDGELOCK EQUIPMENT LIMITED reassignment WEDGELOCK EQUIPMENT LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ANDERSON, ANDRE RICHARD, GIBSON, ASHLEY CRAIG, RIDER, Andrew James Phillip
Publication of US20150322646A1 publication Critical patent/US20150322646A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/365—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with redundant latching means, e.g. for safety purposes
    • 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
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3622—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with a hook and a locking element acting on a pin
    • 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
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3627—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with a hook and a longitudinal locking element
    • 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
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/364—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat using wedges
    • 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
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3663—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat hydraulically-operated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/59—Manually releaseable latch type
    • Y10T403/591—Manually releaseable latch type having operating mechanism

Definitions

  • This invention relates to a locking mechanism for a quick coupler.
  • Quick couplers for mounting an attachment e.g. a bucket
  • an earth working machine such as an excavator
  • hydraulically operate the quick coupler A potential danger with an hydraulically operable quick coupler is that in the event of hydraulic failure the quick coupler can fail to retain the attachment in a working position.
  • the coupler can fail to hold the attachment at one of the mounting points with the result that the attachment can swing down from the coupler. The consequences of this can be injury to or death of someone in the vicinity of the attachment when the coupler fails.
  • An object of the present invention is thus to provide a locking mechanism for a quick coupler whereby an attachment mounted by the quick coupler is retained in a working position on the coupler in the event of hydraulic failure or to at least provide the public with a useful choice.
  • a locking mechanism for a quick coupler including a movable locking element, biasing means adapted to bias the locking element to move in a first direction and an operator arranged to move the locking element against the bias of the biasing means, the locking element has engagement means which, when the locking element is moved by the biasing means in the first direction, is engagable with further engagement means coupled to a movable wedge element of a quick coupler to lock the wedge element from moving.
  • a quick coupler that includes a movable wedge element, hydraulically operable operating means to move the movable element, a movable locking element, biasing means adapted to bias the locking element to move in a first direction and an operator arranged to restrain the locking element against movement in the first direction, the locking element has engagement means which, when the locking element is permitted to be moved by the biasing means in the first direction in the event of failure of hydraulic supply to the operating means, is engagable with the movable element to lock the movable element against movement.
  • the biasing means is a mechanical biasing mechanism.
  • the mechanical biasing mechanism is at least one spring.
  • the operator is an hydraulically operated linear actuator.
  • the operator is operated by hydraulic pressure that from the hydraulic pressure source of the operating means for the wedge element.
  • the engagement means and further engagement means are both formed by a plurality of teeth that are arranged to intermesh.
  • Preferably movement of the locking element creates a compressive force that causes the teeth to positively mesh and remain meshed.
  • a stop that is engagable with the locking element when the locking element is restrained by the operator to thereby create a clearance between the engagement means and further engagement means.
  • the further engagement means are part of a catch component that is adapted to couple to the movable element.
  • the locking element is movably coupled to a drive component.
  • the locking element and drive component have inter-engaging drive faces adapted translate movement of the locking element by the biasing means into a lateral movement of the locking element.
  • the locking element and drive component further include slidingly engaged rails and guides.
  • coupler there is a plurality of locking mechanisms.
  • FIG. 1 is a diagrammatic side elevation view in section of an hydraulic quick coupler incorporating a first embodiment of a locking mechanism in accordance with the present invention
  • FIG. 2 is an enlarged partial view of the arrangement shown in FIG. 1 and illustrates the locking mechanism of FIG. 1 when the wedge element of the quick coupler is moved to a wedging position
  • FIG. 3 is a detail view of the juxtaposition of the teeth as shown in FIG. 2 ,
  • FIG. 4 is a view similar to FIG. 2 when the quick coupler wedge element is moved (retracted) to a non wedging position during normal hydraulic operation of the quick coupler,
  • FIG. 5 is a view similar to FIG. 4 but showing the locking mechanism locking the wedge element upon an hydraulic failure occurring
  • FIG. 6 is an isometric view of a coupler with a side removed to show the wedge and cylinder which incorporates a second embodiment of the locking mechanism
  • FIG. 7 is an exploded isometric view of the wedge, cylinder with second embodiment of the locking mechanism as shown in FIG. 6 ,
  • FIG. 8 is an assembled view of the arrangement shown in FIG. 7 with the wedge fully retracted
  • FIG. 9 is a similar view to FIG. 8 but with the wedge fully extended
  • FIG. 10 is a sectioned isometric partial view showing the locking mechanism components with the teeth fully apart (unlatched state), the section having been taken a quarter way down the mechanism,
  • FIG. 11 is a view similar to FIG. 10 but with the teeth in a position where any backward movement of the catch 23 will result in inter-engagement of the teeth 19 and 20 to cause the locking mechanism to become engaged so that the latch 11 is no longer able to move forward again into the unlatched state unless the catch 23 also moves forward again,
  • FIG. 12 is a view similar to FIG. 11 but showing the latch 11 having moved backwards by the bias spring 13 and outwards by the angled faces 25 of the drive component 24 thereby having been moved into a latched state where the two sets of teeth 19 and 20 come into contact with one another,
  • FIG. 13 is a view similar to FIG. 12 showing the teeth 19 and 20 fully engaged in the locked state
  • FIG. 14 is an isometric sectioned view of components of the locking mechanism as shown in FIGS. 10 to 13 but with the section having been taken at the level of the upper surface of the biasing spring 13 ,
  • FIG. 15 is a view similar to FIG. 14 but with the section taken below the biasing spring 13 ,
  • FIG. 16 is a view similar to FIG. 15 but with the latch 11 shown biased forward into the locked state
  • FIG. 17 is an isometric view of the latch 11 and drive component 20 showing the latch in the unlatched state
  • FIG. 18 is a view similar to FIG. 17 but with the latch 11 in the engaged (locked) state
  • FIG. 19 is a further sectioned view (taken at the level of FIG. 14 ) which shows the latch 11 moved forward by the biasing spring 13 into the engaged (locked) state and showing a clearance between a release actuator 26 of operator 12 and the latch 11 ,
  • FIG. 20 is a view similar to FIG. 19 but with the release actuator 26 having been moved into contact with the latch 11 ,
  • FIG. 21 is a view similar to FIG. 20 but with the release actuator 26 having moved the latch 11 backwards against the bias of the spring 13 , and
  • FIG. 22 is a further view similar to FIG. 21 but with the release actuator fully extended so as to have moved the latch 11 fully backwards into the unlatched state.
  • the locking mechanism engages and locks the wedge tongue against movement immediately if there is a failure of hydraulic pressure to the quick coupler so that the wedge tongue is prevented from any movement that may result in release of the mounting point(s) of an attachment mounted by the quick coupler.
  • FIG. 1 there is shown a known form of quick coupler A made by our company and a first embodiment of the locking mechanism 10 of the present invention when incorporated in the quick coupler.
  • the quick coupler A is operated hydraulically by the hydraulics of the machine to which the coupler is attached.
  • the body B of the coupler has mounting points C whereby the coupler is attached to say the arm of an excavator (not shown).
  • the body B has a hook shaped part D into which one of the mounting pins of an attachment (not shown) engages. Another mounting pin of the attachment locates in the recess E.
  • An hydraulically powered wedge element or tongue F (hereinafter “wedge F”) is extendible to capture the attachment mounting pin in the recess E whereby the attachment is coupled to the coupler A in its working position.
  • the wedge F can retract which will enable release of the mounting pin from the recess E to occur. If the other pin in hook shaped part D is not retained in position the attachment can fall from the excavator arm. If the pin in the hook shaped part D is, however, retained (by say our I Lock device as described and claimed in our New Zealand patent specification 552294/546893) then the attachment will not fall completely off the coupler A but will swing down on the pin in hook shaped part D.
  • the wedge F is part of an operating means formed by hydraulic cylinder G which controls the extension and retraction of the wedge F.
  • hydraulic cylinder G which controls the extension and retraction of the wedge F.
  • the locking mechanism 10 is integrated into the cylinder G/wedge F interface, however, this is only one example of how the locking mechanism of the present invention may be incorporated into a quick coupler. A further embodiment will be described later with reference to FIGS. 6 to 22 .
  • the locking mechanism 10 includes a locking element 11 (hereinafter “latch 11 ”), an operator 12 preferably in the form of a linear actuator (e.g. hydraulic cylinder) and a mechanical biasing element 13 preferably in the form of e.g. a spring.
  • the cylinder 12 is arranged to be operable by the machine hydraulics when the wedge F is retracted (see FIG. 4 ).
  • the mechanical biasing mechanism biases the latch 11 into movement in a first direction that is indicated by the letter X.
  • the latch 11 is substantially wedge shaped. A surface of the latch 11 and a surface fixed in relation to the coupler body B form a sliding interface 14 that will hereinafter be described in more detail.
  • the latch 11 has a fixed surface 16 against which the cylinder can act.
  • a shoulder 15 provides the surface 16 with which the cylinder 12 is engagable.
  • One end of the spring biasing element 13 is located in a pocket (bore) 17 in the latch 11 .
  • the other end of spring 13 engages against a fixed surface 18 .
  • teeth or serrations 19 which are located opposite to, and are inter-engagable with, teeth or serrations 20 (hereinafter “teeth 20 ”) that are coupled to the wedge F of the coupler (see detail in FIG. 3 ).
  • the teeth 20 can be part of an element (as described in the second embodiment) that is attachable to some part of the wedge F or the wedge operating cylinder G.
  • the connection of teeth 20 to the wedge F is achieved is not important to the invention the primary criteria being that the teeth 20 move with the wedge F.
  • FIG. 3 shows the preferred configuration of the teeth sets 19 and 20 . They can however, take different forms provided they achieve the functional parameters as will herein after become apparent.
  • the teeth sets 19 and 20 are such that when the wedge F is moved (extended) into its operative wedging position the teeth 20 ride over the teeth 19 due to the contact angle.
  • the detail drawing of FIG. 3 shows the teeth sets 19 and 20 when teeth 20 ride over the teeth 19 .
  • the latch 11 is free to move against the tension of spring 13 as the wedge F is extended so that the teeth 19 and 20 ride over one another so that the latch 11 does not inhibit the extension of the wedge F.
  • the latch 11 comes into contact with a stop which conveniently is formed by surface 18 .
  • a clearance (indicated by the letter Z) is formed between the teeth 19 and 20 . This ensures that the wedge F can freely retract ( FIG. 3 ).
  • the locking mechanism 10 therefore locks the wedge F in its extended position and this locking effect is not lost upon an occurrence of hydraulic supply failure.
  • teeth 19 and 20 may be relatively small which means backlash in the mechanism is very small and effectively creates infinitely variable locking positions. As a result the wedge F will be locked irrespective of what extended position the wedge F takes. Also the teeth 20 mesh across all or substantially all of teeth 19 .
  • FIGS. 6 to 22 illustrate a second embodiment of the locking mechanism of the invention.
  • One difference between the first and second embodiments is that in the second embodiment there are preferably (as shown) two locking mechanisms (one either side of the cylinder G and wedge F) rather than the single mechanism below the wedge F.
  • FIG. 6 shows the coupler A but with one side plate component of the body B removed to reveal the hydraulic cylinder G and wedge F. It also shows the locking mechanism 10 but this is better seen in FIG. 7 and subsequent drawings.
  • FIG. 7 illustrates how the teeth/serrations 20 (hereinafter “teeth 20 ”) are part of a catch plate component (“catch”) 23 that is fastened by suitable mechanical fasteners to a rebated inner surface 27 of the leg 28 of a bifurcated section of the wedge F. As shown there is a locking mechanism 10 associated with each leg 28 of the wedge F.
  • latch 11 has teeth/serrations 19 (i.e. teeth 19 ).
  • FIG. 7 also shows how there is a pair of operators 12 with associated actuators 26 mounted in either side of housing 30 so that each operator 12 can work on a respective latch 11 of the two locking mechanisms 10 .
  • FIGS. 10 to 13 are sectioned views with the section level being substantially a quarter way down the cylinder G.
  • FIG. 10 shows the locking mechanism components 11 , 23 and 24 with the teeth 19 and 20 fully apart (unlatched state). The clearance Z mentioned in the first embodiment is also shown.
  • a large serrated part of the latch 11 meshes with the corresponding serrated part of the drive component 24 to form a series of drive faces 31 and 32 and stop faces 33 and 34 with a end stop face 18 (see FIGS. 11 and 12 ) being formed by an end wall of the mounting recess 29 .
  • the bias spring 13 is located in pocket 17 in the latch 11 and this acts against stop face 34 ′.
  • the controlled longitudinal and lateral movement of latch 11 by the drive component 24 is further enhanced by the drive component 24 having angled guide rails 35 and 36 that engage with guide slots 37 and 38 in the latch 11 (see for example FIGS. 14 to 16 ).
  • These rails 35 and 36 align with the latch plate slots 37 and 38 and assist the release process when the release actuator 26 pushes on the back face 39 of the latch 11 .
  • the slot face slides on the rail thereby pulling the latch 11 back in a controlled line with the drive faces 31 and 32 and bias spring 13 .
  • These also assist with a ratchet effect that occurs when the wedge F is extended, thereby ensuring that the movement of latch 11 is parallel and consistent between each of the sets of teeth 19 and 20 .
  • FIGS. 17 and 18 show how the latch 11 can move from the “retracted” state (unlatched) of FIG. 17 to the “extended” state (engaged) of FIG. 18 and further shows the portion of latch 11 with slots 37 and their interaction with rails 35 .
  • FIGS. 19 to 22 show a section taken at a level that shows the spring 13 in the pocket 17 .
  • These drawings also show how the actuator 26 of the operator 12 can engage with surface 39 of latch 11 and drive the latch 11 back into the unlatched state.
  • the release actuator 26 has its own return spring 40 (see FIG. 7 ) which retracts the actuator 26 away from the latch 11 contact face 39 ( FIG. 19 ) when its hydraulic pressure is released. This ensures that the bias spring 13 only has to effect the movement of latch 11 .
  • FIG. 10 shows the latch 11 moved to its fully retracted (unlatched) position where the clearance Z allows the wedge F to be moved without any interference i.e. from teeth 19 and 20 making contact.
  • FIG. 11 shows the teeth 19 and 20 in a position where any backward movement of the catch 23 will result in inter-engagement of the teeth 19 and 20 to thereby cause the locking mechanism 10 to become engaged so that the latch 11 is no longer able to move forward again into the unlatched state unless the catch 23 also moves forward again.
  • FIG. 12 shows the latch 11 having moved backwards by the bias spring 13 and outwards by the angled faces 31 of the drive component 24 thereby having been moved into a latched state where the two sets of teeth 19 and 20 come into contact with one another.
  • FIG. 13 shows the teeth 19 and 20 fully engaged in the locked state. Any movement of the catch 23 backwards causes the latch 11 to drive further back on the drive component 24 which locks the wedge F in place.
  • a technical aspect of the invention is the relationship between angle of movement of the latch 11 on the drive component 24 and the angle of the sets of teeth 19 and 20 .
  • the latch 11 in the preferred form moves at an angle of 30 degrees while the teeth 19 , 20 angle is set at 45 degrees.
  • the latch 11 in the preferred form moves at an angle of 30 degrees while the teeth 19 , 20 angle is set at 45 degrees.
  • the catch 23 moves backwards enough to shift into the engaged state (an engaged state being the point where the two sets of teeth 19 and 20 are permanently interlocked) they are no longer able to be separated due to the cross over angle relationships. This leaves the locking mechanism 10 in an engaged state and separation is unable to happen until the catch 23 is moved forwards out of the way. This state is shown by FIG. 11 .
  • the locking mechanism of the present invention is operable in the event of hydraulic failure to ensure an attachment mounted by the quick coupler is retained in a working position on the coupler.
  • the coupler illustrated herein is only one type of coupler with which the locking mechanism can be used.
  • the locking mechanism can be provided in retro fit kits to be fitted to couplers other that the type illustrated in the drawings and described herein.
  • the release actuator does not need to be hydraulically operated.
  • the invention is relevant to a hose-less hydraulic-less coupler and in such an arrangement, as well as a coupler of the type described herein, other means for releasing can be employed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Shovels (AREA)
US14/650,858 2012-12-10 2013-12-04 A locking mechanism Abandoned US20150322646A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NZ604110 2012-12-10
NZ60411012 2012-12-10
PCT/NZ2013/000219 WO2014092584A1 (en) 2012-12-10 2013-12-04 A locking mechanism

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US20150322646A1 true US20150322646A1 (en) 2015-11-12

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Application Number Title Priority Date Filing Date
US14/650,858 Abandoned US20150322646A1 (en) 2012-12-10 2013-12-04 A locking mechanism

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US (1) US20150322646A1 (cg-RX-API-DMAC7.html)
EP (1) EP2931981A4 (cg-RX-API-DMAC7.html)
JP (1) JP2016500410A (cg-RX-API-DMAC7.html)
KR (1) KR20150094691A (cg-RX-API-DMAC7.html)
AU (1) AU2013360409A1 (cg-RX-API-DMAC7.html)
WO (1) WO2014092584A1 (cg-RX-API-DMAC7.html)

Cited By (4)

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Publication number Priority date Publication date Assignee Title
US20180355579A1 (en) * 2015-12-07 2018-12-13 Wedgelock Equipment Limited A locking device for a quick coupler
WO2020123095A1 (en) 2018-12-12 2020-06-18 Caterpillar Inc. Tool coupling arrangement having zero offset
US10975544B1 (en) * 2020-04-27 2021-04-13 Caterpillar Inc. Work tool coupling assembly with locking wedge
US20220098821A1 (en) * 2018-11-30 2022-03-31 Hughes Asset Group Pty Ltd. A coupler

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GB2610148B (en) * 2018-06-25 2023-08-09 Miller Uk Ltd Coupler
GB2576131B (en) 2018-06-25 2023-01-18 Miller Uk Ltd Coupler

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US20050169703A1 (en) * 2001-11-29 2005-08-04 Jrb Attachments, Llc Spread-style coupler with supplemental lock system
US20100107456A1 (en) * 2006-09-04 2010-05-06 Miller Uk Limited Coupler
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180355579A1 (en) * 2015-12-07 2018-12-13 Wedgelock Equipment Limited A locking device for a quick coupler
US11846083B2 (en) * 2015-12-07 2023-12-19 Wedgelock Equipment Limited Locking device for a quick coupler
US20240068196A1 (en) * 2015-12-07 2024-02-29 Wedgelock Equipment Limited A locking device for a quick coupler
US12428799B2 (en) * 2015-12-07 2025-09-30 Wedgelock Equipment Limited Locking device for a quick coupler
US20220098821A1 (en) * 2018-11-30 2022-03-31 Hughes Asset Group Pty Ltd. A coupler
US12110649B2 (en) * 2018-11-30 2024-10-08 Hughes Asset Group Pty Ltd. Coupler
WO2020123095A1 (en) 2018-12-12 2020-06-18 Caterpillar Inc. Tool coupling arrangement having zero offset
CN113167047A (zh) * 2018-12-12 2021-07-23 卡特彼勒公司 具有零偏移的工具联接装置
US11208785B2 (en) * 2018-12-12 2021-12-28 Caterpillar Inc. Tool coupling arrangement having zero offset
EP3894637A4 (en) * 2018-12-12 2022-08-31 Caterpillar, Inc. TOOL COUPLING ARRANGEMENT WITH ZERO SHIFT
US10975544B1 (en) * 2020-04-27 2021-04-13 Caterpillar Inc. Work tool coupling assembly with locking wedge

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EP2931981A1 (en) 2015-10-21
JP2016500410A (ja) 2016-01-12
KR20150094691A (ko) 2015-08-19
WO2014092584A1 (en) 2014-06-19
AU2013360409A1 (en) 2015-07-23
EP2931981A4 (en) 2016-11-02

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