WO2020002883A1 - Fer à cheval de coupleur - Google Patents

Fer à cheval de coupleur Download PDF

Info

Publication number
WO2020002883A1
WO2020002883A1 PCT/GB2019/051747 GB2019051747W WO2020002883A1 WO 2020002883 A1 WO2020002883 A1 WO 2020002883A1 GB 2019051747 W GB2019051747 W GB 2019051747W WO 2020002883 A1 WO2020002883 A1 WO 2020002883A1
Authority
WO
WIPO (PCT)
Prior art keywords
coupler
pin
latching member
jaw
contact
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.)
Ceased
Application number
PCT/GB2019/051747
Other languages
English (en)
Inventor
Keith Miller
Gary Miller
Gavin URWIN
Howard Reay
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.)
Miller UK Ltd
Original Assignee
Miller UK 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 Miller UK Ltd filed Critical Miller UK Ltd
Publication of WO2020002883A1 publication Critical patent/WO2020002883A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • E02F3/3622—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
    • E02F3/3618—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with two separating hooks
    • 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
    • E02F3/3631—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 transversal 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
    • E02F3/365—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
    • E02F3/3663—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat hydraulically-operated
    • 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

Definitions

  • the present invention relates to a coupler comprising a modified horseshoe, in particular a coupler with a horseshoe for improving the retention of an accessory on of the coupler in the event of a failure of the actuator thereof.
  • Excavator couplers are well known in the art. They attach to the end of an excavator arm of an excavator to allow quick coupling and decoupling of an accessory onto the arm of the excavator.
  • couplers 10 generally comprise a body or housing 12 that has a top part and a bottom part 16. Sometimes the two parts are visually delimited, but as illustrated in this embodiment they need not be.
  • the top part 14 is commonly fitted with two apertures 16 for attaching the coupler to an excavator arm by using a pair of excavator arm attachment pins, whereas the bottom half 16 comprises two jaws 18 and 20, a first jaw being a front jaw 18, which generally points in a forward direction relative to the coupler and a rear jaw 20 which opens downward relative to the coupler.
  • a latching mechanism internal of the housing 12 which in this embodiment is a pivoting latching hook 22 which is mounted for rotation about an axle 24 and controlled by a hydraulic cylinder 26.
  • the hydraulic cylinder will be connected to control hydraulics from the excavator that allow an operator of the excavator to selectively open or close the latching hook as appropriate, generally from within the cab of the excavator. This may be via a switch.
  • the operator In use, to connect the coupler to an accessory, such as a digging or loading bucket, the operator would ensure that the pivoting latching hook has been retracted by compressing the piston 28 of the hydraulic cylinder 26 of the coupler into the hydraulic cylinder 26 and would then manipulate the excavator arm, including rotating the coupler as necessary, using the hydraulic systems provided for that purpose on the excavator, to manipulate the front jaw 18 of the coupler onto a first attachment pin of the accessory, which accessory will have two such pins in parallel mounted on the frame thereof. The operator would then rotate the coupler 12 so as to lower the rear jaw 22 over the second pin of the accessory as well.
  • the present invention seeks to provide a further approach for protecting against this preferably without adding to the component count of the coupler, as couplers are already complex. As such it would be useful to provide a coupler that can reduce the risk of a decoupling of an accessory following a failure of the hydraulic cylinder 26, or other undesired causes of creep of the piston into the cylinder.
  • a coupler comprising a top part for attaching to an excavator arm of an excavator and a bottom part for attaching to an accessory, the bottom part comprising a first jaw that opens in a forwards direction for receiving a first attachment pin of the accessory and a second jaw opening in a downwards direction for receiving a second accessory pin of the accessory, wherein the second jaw is associated with a latching member that sweeps between an open condition and closed condition for selectively securing or releasing the second attachment pin of the accessory in the second jaw, the second jaw comprising an upper wall surface and a wedging surface, the wedging surface being closer to the front of the coupler than the upper wall surface.
  • the accessory is likely to be a digging or loading bucket.
  • the first jaw is commonly referred to as the front jaw as it is the first jaw to engage a pin of an accessory when attaching the accessory to the coupler, whereby the coupler moves “forward” into an engagement with that first pin in the first step of that attachment.
  • the second jaw is thus commonly referred to as the rear jaw.
  • the upper wall surface is the surface against which the second attachment pin of the accessory is thereafter clamped by the latching member when the accessory is secured onto the coupler.
  • the latching member has a pin engagement face that is not parallel to the upper wall surface, but which instead opens relative to the upper wall surface as it extends towards a free end of the latching member.
  • the two attachment pins of the accessory are parallel and a fixed space apart, by virtue of them being fixed to the frame of the accessory, either temporarily or permanently, upon clamping the second attachment pin of the accessory between the upper wall surface of the rear jaw and the pin engagement face of the latching member, the first attachment pin of the accessory will be clamped to the back of the front jaw in the accessory secured condition.
  • the second attachment pin will eventually contact the wedging surface, and be pushed out from the line of the upper wall surface and into firm(er) engagement with the pin engagement face of the latching member. This reduces the amount of rattle in the connection.
  • the wedging surface thus provides an advantage.
  • the wedging surface kinks angularly from the frontward end of the convex top surface. In this manner it gives the impression of a slice being cut off the shape of the forward corner of the rear jaw 20, or it provides a chord like cut across that corner.
  • the wedging surface thus cooperates with the latching member to grip or position the rear attachment pin in engagement with the latching member if the latching member was to be swept back into a non-secured latching position.
  • the wedging surface when in use, provides a shortened distance between the contact point of the pin on the latching member and the contact point on the rear jaw compared to the contact point of the pin on the latching member and the upper wall surface of the rear jaw in the secured latching position.
  • the top part of the coupler comprises two pin attachment points for attaching the coupler to the excavator arm using two pins through those pin attachment points.
  • the centres of those pin attachment points between them define an imaginary line that extends forwards and back, the front jaw opening substantially parallel to that line, or within a variance of up to 15 degrees therefrom.
  • the rear jaw opens in a direction substantially perpendicular to that line, or within a variance of up to 15 degrees therefrom.
  • the latching member is a pivotal latching hook, it thus sweeps along a generally circular path, preferably co-axial to a convex upper wall surface.
  • it may be a linear sliding latch, sliding parallel to a flat upper wall surface.
  • the latching member is driven by a hydraulic ram comprising a cylinder and a piston.
  • the latching member has a pin latching region comprising the pin engagement face.
  • a tip at the free end of the pin latching region, with an upstanding lip. Between the lip and the pin engagement face there may be a recess into which an attachment pin can rest in the event that the accessory is not in a secured and clamped condition.
  • the lip defines at least a portion having a normal line coincident with the radial arm of the hook. This makes it harder for a pin, in the pin latching region, to fall out of the pin latching region, as contact with the tip must put a return force on the latching member, which will move, or tend to move, the latching member into a latching position.
  • the wedging surface extends between the upper wall surface through to a front side of the rear jaw.
  • the front side is flat.
  • the front side is steeply angled from the base wall of the coupler
  • the front side of the rear jaw is arranged to provide no partial closing of the rear jaw, with no closing lip at the free end thereof.
  • a tangent at the point of contact of the tip of the latching member against the second attachment pin when the attachment pin is seated in a condition of two point contact with the tip and the pin engagement surface or recess of the latching member is substantially parallel to a tangent at the point of contact between the wedging surface and the second attachment pin when the latching member is retracted into a position of such contact, with up to a 10 degree variance.
  • those two tangents are such that the intersection between the tangent lies rearward of the second pin.
  • the angle between the tangents not exceeding 15 degrees, or more preferably 10 degrees, and ideally about 8 degrees, plus or minus 1 degree. This is in order to maintain a sufficient pinch on the second pin between the lip and the wedging surface to hold that pin.
  • the two tangents do not intersect between the first and second pins. As such they intersect either forward of first pin or behind the second pin. The force of the pinch will thus serve to retain the pin within the pinch, rather than forcing the pin out of the pinch.
  • the height if the lip at the tip of the latching member, as measured perpendicular to the lowest or radially outermost part of the pin engagement face or the recess, is 0.2x or 20% of the diameter of the attachment pin.
  • the shortest distance between the tip of the latching member and the upper wall surface of the jaw still needs to remain larger than the diameter of that attachment pin, however, to ensure that the pin can be accommodated into the latch of the latching member. It is important to note that creep is unusual in couplers. However, it can occur due to the weight of the accessory if the hydraulic cylinder is not pressurised, thus causing compression of the piston into the cylinder. Commonly, however, the cylinders have non return valves to stop this. The creep then might occur due to a failure of the seals or valves of the cylinder.
  • the wedging surface is straight over at least 50% of its length. However, it need not be straight. It may be part curved, but preferably the middle 80% is either straight or has a radius of curvature of at least 10cm. It may be concave or convex. The region between the upper wall surface and the wedging surface, however, is to be concave.
  • the wedging surface has a radius of curvature between flat and the radius, if any, of the upper wall surface of the rear jaw.
  • Either or both of the end 10% of the wedging surface may be curved, for example by rounding the juncture of it with the upper wall surface or base wall of the coupler.
  • the wedging surface kink s from the upper wall surface.
  • the kink may be rounded or a sharp kink.
  • the radius of the kink, where present, is smaller than half the radius of the second attachment pin of the accessory.
  • the kink will invert the wedging surface out from the upper wall surface towards the base wall of the coupler, and where present will invert from the convex curve of the upper wall surface, which create a concavity between the upper wall surface and the wedging surface.
  • the latching member defines a hook with the tip being a free end thereof.
  • the latching member comprises a sprung member to resist lifting of the second attachment pin up and over the tip of the latching member.
  • a free end of the sprung member is located adjacent the mouth of the hook of the latching member.
  • the sprung member comprises a sprung retention pin located in a body of the latching member to extend out from the upper wall surface just rearward of the tip of the latching member. Creep or withdrawal of a piston into a hydraulic cylinder for controlling motion of the latching member can be resisted by that sprung retention pin.
  • the sprung member can retract if suitably forced, e.g. by the hydraulics powering the latching member into an unlatching condition to release the pin, or conversely to allow clicking in of a pin into the hook upon moving the latching member into a latching condition by use of the hydraulics.
  • the maximum extension of the sprung member beyond the upper wall surface closes the mouth of the latching member to a height up to 15% smaller than the diameter of the second attachment pin, or up to 100% of the height of the lip at the tip of the latching member, as previously defined.
  • the gap between the sprung member’s free end and the tip of the latching member is preferably at least 5% smaller than the diameter of the second attachment pin.
  • the mechanism for providing the spring bias for the sprung member is a bore within the back of the retention pin and a compression spring or a rubberised spring extending therein and out the top thereof, with a retention plate then securing the free end thereof relative to the body of the latching member.
  • the sprung member slides or moves with the latching member as the latching member opens or closes the rear jaw.
  • Figure 1 shows a prior art coupler having a rear jaw or horseshoe, a pivotal latching member and a hydraulic ram for movement thereof;
  • Figure 2 shows a further design of coupler having a rear jaw or horseshoe - the latching member and ram are not shown for clarity - the would be fitted within the coupler;
  • Figures 3 to 6 show a modified coupler of Figure 2, with the lifting eye removed, but with the rear jaw profile modified to be in accordance with the present invention;
  • FIG. 3 to 6 an embodiment of the present invention is shown. It comprises a pivoting hook associated with a rear jaw or horseshoe 20, but it can be seen that the rear jaw 20 has now been modified to have a wedging surface 32 kinking off a frontward end 54 of the convex top surface 56 of the rear jaw 20, which gives the impression of a slice being cut off the shape of the upper-forward corner 58 (see Figure 2) of the rear jaw 20.
  • the wedging surface 32 can be seen to extend between the convex curve 56 of the top wall through to the front wall 52 of the rear jaw 20.
  • the flat wall is non-essential as that wall may again be curved, as per Figures 1 and 2, or it may even be flat to the wedging surface 32, thus effectively extending the wedging surface 32.
  • the angle to the imaginary line 64 for the flat front wall is approximately 80 degrees, with no partial closing of the rear jaw, the angle thus being acute to the front of the coupler.
  • the front wall will not snag a pin when the pin exits the jaw 20.
  • the latching hook has a lip 38 at its free end, which is similar to the previous hook of Figure 1.
  • This lip 38 is provided to beneficially co-operate with the wedging surface 32, especially in a condition of cylinder creep - where the cylinder 26 (again see Figure 4) undesirably allows the piston to compress into the cylinder, usually occurring only upon a failure of part of the hydraulics system of the excavator or coupler. That creep, if it ever occurs, would potentially allow the latching hook 22 to open the rear jaw 20, which in turn relaxes the securement of the accessory, ultimately allowing the two pins 34, 36 in the two jaws 18, 20 to move around.
  • the accessory may move in a generally forwards direction, as indicated by the arrow 66 in Fig 4, such that the front pin 34 of the accessory starts to lift from the back 70 of the first jaw 18, as shown in Figure 4. This movement occurs simultaneously with a forwards movement of the second pin 36 in the rear jaw 20, as the two pins 34, 36 are locked together by the structure of the accessory.
  • the front jaw 18 is designed to accommodate such forward movement, by being much deeper than the diameter of the pin 34. Nevertheless, such movement does loosen the accessory. Such creep may be through a failure of the hydraulics for the cylinder, or the electronics/valves therefor, and the weight of the accessory usually will cause the forward movement 66. The creep might even occur in response to an inadvertent triggering of a release, or partial release, of the coupler.
  • this radial movement is accompanied by the second pin 36 sliding across the engagement face 72 of the latching hook 22 towards the tip 38 of the latching hook 22.
  • the pin 36 eventually hits that lip 38 or recess 40, as shown in figure 6, forming a two point contact against the hook 22, which along with the single point contact with the wedging surface serves to hold the accessory pin 36.
  • a tangent 74 at the point of contact 76 of the tip 38 against the pin 36 is angled relative to a tangent 78 at the point of contact 80 of the wedging surface against that pin 36 such that the meeting point 82 of the tangents is forward of second pin 36.
  • the meeting point does not lie between the first and second pins, as this presents a wider angle between the tangents in a manner that can allow the rear pin to pop out of the pinch between the wedging surface and the lip.
  • Creep is unusual in couplers. However, it can occur due to the weight of the accessory if the hydraulic cylinder is not pressurised, thus causing compression of the piston into the cylinder. Commonly, however, the cylinders have non return valves to stop this. The creep then might occur due to a failure of the seals or valves of the cylinder.
  • the wedging surface 32 is shown to be generally straight. However, it need not be straight. Typically it is much flatter than the convex surface 56, and it kinks away from it.
  • the kink may be a radiused kink or a sharp kink. Preferably the radius of the kink is smaller than half the radius of the second attachment pin 36 of the accessory.
  • the kink inverts the convex curve to create a concavity between the convex surface and the wedging surface.
  • This product has a sprung retention pin 48 located in the body of the sliding hook just forward of the lip but in the upper wall thereof. Creep or withdrawal of the piston 28 into the hydraulic cylinder 26, as used to control sliding of the sliding hook 42, can be resisted by that sprung retention pin 48. That sprung retention pin is spring biased into its extended condition as shown, in which it bears against the second attachment pin 36.

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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)
  • Component Parts Of Construction Machinery (AREA)

Abstract

L'invention concerne un coupleur (10), lequel coupleur comprend une partie supérieure (14) pour l'attachement à un bras d'excavatrice d'une excavatrice et une partie inférieure pour l'attachement à un accessoire pour l'excavatrice, la partie inférieure comprenant une première mâchoire (18) qui s'ouvre dans une direction vers l'avant pour recevoir une première broche d'attachement de l'accessoire et une seconde mâchoire (20) s'ouvrant dans une direction vers le bas pour recevoir une seconde broche d'accessoire de l'accessoire, la seconde mâchoire (20) étant associée à un élément de verrouillage (22) qui effectue un balayage entre une condition ouverte et une condition fermée pour fixer ou libérer de manière sélective la seconde broche d'attachement de l'accessoire dans la seconde mâchoire (20), la seconde mâchoire (20) comprenant une surface de paroi supérieure (56) et une surface de calage (32), la surface de calage (32) étant plus proche de l'avant du coupleur que la surface de paroi supérieure (56).
PCT/GB2019/051747 2018-06-25 2019-06-21 Fer à cheval de coupleur Ceased WO2020002883A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1810409.1 2018-06-25
GB1810409.1A GB2576487A (en) 2018-06-25 2018-06-25 Coupler Horseshoe

Publications (1)

Publication Number Publication Date
WO2020002883A1 true WO2020002883A1 (fr) 2020-01-02

Family

ID=63042517

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2019/051747 Ceased WO2020002883A1 (fr) 2018-06-25 2019-06-21 Fer à cheval de coupleur

Country Status (2)

Country Link
GB (1) GB2576487A (fr)
WO (1) WO2020002883A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB202316148D0 (en) * 2023-10-23 2023-12-06 Rhinox Group Ltd Coupling apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2205299A (en) * 1987-06-04 1988-12-07 William John Balemi Connector for mounting an implement on a vehicle
GB2330570A (en) * 1998-09-08 1999-04-28 Miller Ronald Keith Quick coupler for bucket excavators
GB2473942A (en) * 2009-09-22 2011-03-30 Ian Hill Hydraulic coupler with attachment pin retention system
WO2017099610A1 (fr) * 2015-12-07 2017-06-15 Wedgelock Equipment Limited Dispositif de verrouillage pour raccord rapide

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6379075B1 (en) * 2000-01-18 2002-04-30 Gh Hensley Industries, Inc. Quick coupler apparatus
GB0816335D0 (en) * 2008-09-08 2008-10-15 Hill Ian Coupler with gravity operated safety device
GB2474905B (en) * 2009-11-02 2015-07-22 Patrick Mccormick A quick hitch coupler
GB2488990A (en) * 2011-03-09 2012-09-19 Miller Int Ltd Excavator coupler with magnetic latch

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2205299A (en) * 1987-06-04 1988-12-07 William John Balemi Connector for mounting an implement on a vehicle
GB2330570A (en) * 1998-09-08 1999-04-28 Miller Ronald Keith Quick coupler for bucket excavators
GB2473942A (en) * 2009-09-22 2011-03-30 Ian Hill Hydraulic coupler with attachment pin retention system
WO2017099610A1 (fr) * 2015-12-07 2017-06-15 Wedgelock Equipment Limited Dispositif de verrouillage pour raccord rapide

Also Published As

Publication number Publication date
GB2576487A (en) 2020-02-26
GB201810409D0 (en) 2018-08-08

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