WO2015099543A1 - Improvements to couplers - Google Patents
Improvements to couplers Download PDFInfo
- Publication number
- WO2015099543A1 WO2015099543A1 PCT/NZ2014/000246 NZ2014000246W WO2015099543A1 WO 2015099543 A1 WO2015099543 A1 WO 2015099543A1 NZ 2014000246 W NZ2014000246 W NZ 2014000246W WO 2015099543 A1 WO2015099543 A1 WO 2015099543A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coupler
- pin
- slider
- engagement portion
- trigger
- Prior art date
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
- E02F3/3645—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with auto-engagement means for automatic snap-on of the tool coupler part
-
- 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
-
- 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
- E02F3/3622—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
- E02F3/365—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
Definitions
- the present invention relates to improvements to couplers and particularly to couplers used to secure work attachments to work vehicles.
- Couplers are devices used to secure work attachments to work vehicles. These devices generally function through the coupler having a plurality of jaws to engage a pair of pins on the work attachment. There are countless configurations for the jaws used in available couplers. For instance, some couplers include a single fixed jaw, used in combination with either a sliding jaw or a pivoting jaw (hook). Alternatively, a coupler may include a pair of fixed jaws, at least one of which includes a secondary (moveable) jaw or locking portion to secure the work attachment's pins in the immoveable jaw(s). Work vehicles such as diggers and their work attachments are frequently used in the construction industry. The use of this type of equipment creates health and safety risks.
- This coupler includes a locking member which is pivotally secured to the coupler body. That locking member, when engaged, secures a pin in an immoveable jaw of the coupler body.
- the locking member is positioned above the moveable jaw and below a quick connect that secures the coupler to a work vehicle.
- the locking member needs to pivot to move between release position and a lock position, it requires a large space between the immoveable jaw and the quick connect. That space accentuates the coupler's vertical offset.
- Increasing a coupler's vertical offset increases the tip radius for a work attachment such as a bucket.
- the tip diameter is related to the power which a work vehicle can transfer to the work attachment. Increasing tip diameter decreases the effective power of the work attachment in use. Therefore, decreasing vertical offset would be beneficial.
- a coupler to secure a work attachment to a work vehicle wherein the work attachment includes a first pin and a second pin
- the coupler including: a coupler body having a first engagement portion which is configured to accept the first pin, a second engagement portion configured to accept the second pin, and a guide; a slider configured to slide along the guide, wherein a body of the slider includes a first locking portion and a second locking portion; a trigger located on the coupler body such that the trigger is released by contact with the second pin; and a first actuator that is activated by release of the trigger, wherein when the trigger is released the first actuator can move the slider along the guide into an engaged position where the first locking portion engages and retains the first pin in the first engagement portion of the coupler body, and the second locking portion engages and retains the second pin in the second engagement portion of the coupler body, at the same time.
- first engagement portion and the second engagement portion are located at fixed positions on the coupler body and are spaced apart by a fixed distance.
- the locking portion and the second locking portion are located at fixed positions on the slider body and are spaced apart by the fixed distance.
- the fixed distance corresponds to a separation between the first pin and the second pin of the work attachment.
- the first actuator is a coil spring.
- the coupler includes a locking mechanism configured to hold the slider in a disengaged position, in which the first pin is not retained in the first engagement portion and the second pin is not retained in the second engagement portion, until the trigger is released.
- a coupler substantially as described above including a second actuator which, when activated, is configured to move the slider from the engaged position to the disengaged position.
- activation of the second activator to move the slider into the disengaged position includes resetting the trigger.
- the second actuator is an hydraulically operated actuator.
- a method of securing a work attachment to a work vehicle wherein the work attachment includes a first pin and a second pin
- the coupler includes: a coupler body having a first engagement portion which is configured to accept the first pin, a second engagement portion configured to accept the second pin, and a guide; a slider configured to slide along the guide, wherein a body of the slider includes a first locking portion and a second locking portion; a trigger located on the coupler body such that the trigger is released by contact with the second pin; and a first actuator that is activated by release of the trigger
- the method including the steps of: a) locating the first pin on the work attachment in the first engagement portion of the coupler body; b) inserting the second pin into the second engagement portion of the coupler body so that the second pin contacts and releases the trigger;
- the method includes the step of: releasing the work attachment from the coupler by moving the slider with respect to the coupler body into a disengaged position in which the first pin is not retained in the first engagement portion and the second pin is not retained in the second engagement portion.
- the slider is moved manually. In other embodiments the slider is moved by action of a second activator.
- the step of moving the slider into the disengaged position includes resetting the trigger.
- slider should be understood meaning a component that is configured to move with a sliding motion with respect to the coupler body.
- the coupler including a slider provides a number of benefits.
- the slider requires a comparatively smaller cavity in the coupler body to provide it with the necessary range of motion than a pivoting hook. Therefore, the slider enables the coupler's vertical offset to be minimized compared to different types of couplers.
- the slider is able to provide two locking portions which can each engage a pin on a work attachment e.g. a different pin to the other. This is due to the range of motion of the slider.
- using a hook style coupler requires several separate components to be used to engage two separate pins. That increases the complexity of the hook style couplers. It also means that hook style couplers include more parts to the present invention which increases manufacturing costs, and may reduce the reliability of the coupler. Therefore, the use of a slider assists in reducing the moving parts in the coupler.
- locking portion should be understood as meaning a component to engage a pin of a work attachment.
- a locking portion may have a substantially "c" shaped cross section. Therefore, in use, the locking portion surrounds a substantial portion of a pin.
- the locking portion may be a detent secured to the slider, or an end of the slider. In use, these embodiments abut the pin, and also decrease the opening of a fixed jaw in the coupler. The interaction of the locking portion with the pin and fixed jaw secures the pin to the coupler.
- the locking portion could take alternative forms. For instance, a locking portion may be provided by a pair of movable jaws which both engage the same pin. In these embodiments the interaction of the two moveable jaws secures the pin with respect to the coupler.
- trigger should be understood as meaning a component which when engaged enables an actuator to move the locking portions to a locking position.
- the trigger is configured to move a locking mechanism so that it releases the locking portion(s) to thereby allow them to be moved by an actuator.
- a trigger may assist in providing a coupler that automatically moves two locking portions to an engaged position when the coupler engages with the second pin, without operator involvement.
- disengaged position should be understood as meaning a position in which a locking portion does not engage a pin on a work attachment. It should be appreciated that the term does not refer to the position of the coupler body with respect to a work attachment. Rather, the term refers to the position of the locking portion(s) with respect to the coupler body, and in which the coupler can move with respect to the pins.
- the locking portions are moved by an actuator such as a spring.
- the actuator may take other forms such as being a worm drive, hydraulic actuator, or chain drive mechanism. Therefore the foregoing should not be seen as limiting.
- the coupler is configured so that the locking portions are manually moved to a disengaged position. For instance, a person can apply force to the slider so as to cause it to move with respect to the coupler body.
- the actuator in some embodiments may be a hydraulic cylinder or other suitable component as would be known to one skilled in the art.
- the present invention includes a locking mechanism.
- locking mechanism should be understood as meaning a component to limit, and preferably prevent movement of, the locking portion(s).
- the locking mechanism secures the locking portions in the disengaged and / or engaged positions. Therefore, the locking mechanism prevents the locking portions inadvertently disengaging the pin(s).
- the locking mechanism can hold the locking portions in a disengaged position. This enables a trigger to be used to release the locking portions on engagement by a pin of a work attachment.
- the locking mechanism could be provided by check valves that restrict expansion or contraction of a hydraulic cylinder which is configured to move the locking portions.
- the present invention may have a number of advantages, such as: ⁇ Automatically causes a locking portion(s) to be moved to an engaged position to thereby secure a work attachment to the coupler without operator involvement. This reduces the potential for a work attachment to be improperly connected to the coupler and thereby provides a potentially safer coupler.
- the coupler may be more cost effective to manufacture, easier to maintain, and less prone to failure.
- Figure 1 is a side perspective exploded view of a coupler according to one embodiment of present invention
- Figure 2 is a front view of an assembled coupler according to a first embodiment of the present invention
- Figure 3 is a top view of Figure 2
- Figure 4 is a perspective view of Figures 2 and 3
- Figure 5 is a side view of Figures 2 - 4;
- Figures 6D are side cross-sectional schematics showing the process of securing a work attachment to a vehicle using a coupler according to the first embodiment of the present invention
- Figure 7 is an exploded perspective of a second embodiment of a coupler according to the present invention.
- Figure 8 is a side view of a coupler according to the second embodiment of the present invention.
- Figure 9 is a top view of Figure 8.
- Figure 10 is a side-cross sectional view of a coupler according to the second embodiment of the present invention in a locked position
- Figure 1 1 a view of Figure 1 1 in a release position.
- the coupler (1) includes a coupler body (2).
- the coupler body (2) includes apertures (3) forming part of a quick connect configured to secure the coupler (1) to an arm of a work vehicle (not shown in the Figures).
- the coupler body (2) includes a first engagement portion in the form of a first fixed jaw (9).
- the first fixed jaw (9) has a substantially "C" shaped cross-section as is best seen in Figure 5.
- the first fixed jaw (9) includes a cradle section (10) and a lip (1 1).
- the linear (shortest) distance between a first edge of cradle (10A) and a second edge of cradle (10B) is sufficient to enable a first pin (12) on a work attachment (not shown in the Figures) to be inserted into the jaw (9).
- the coupler body also includes a second engagement portion in the form of a second fixed jaw (25).
- the second fixed jaw is in the form of a curved face on the underside of the coupler body.
- the opening of the first fixed jaw is directed towards the front of the coupler body while the opening of the second fixed jaw is directed towards the rear of the coupler body.
- the coupler body (2) includes a guide in the form of channels (4).
- the channels (4) are configured to receive the side edges (6) of a slider, generally indicated by arrow (5) in Fig. 1.
- the slider (5) provides a first locking portion (7).
- the first locking portion is provided by a surface on an underside of a front end of the slider.
- the surface is flat.
- the slider (5) includes a second locking portion in the form of a slider fixed jaw (8) that is substantially "C" shaped in cross-section.
- the opening of the slider fixed jaw is directed towards the front of the slider, so that the slider fixed jaw (8) forms a clamp with the second fixed jaw of the coupler body (25).
- the first locking portion (7) and the second locking portion (8) are located at fixed positions on the slider. Therefore, movement of the slider (5) with respect to the coupler body (2) does not alter the separation between the first and second locking portions (7, 8).
- the slider includes a beam (26) which forms part of a locking mechanism.
- the beam has a cross section like a truncated rectangle; i.e. a rectangle with a cut made from a corner on one side to a point partially along the opposite side, the cut forming a ramp between the two sides.
- the beam is located across the slider body near the rear of the slider body, such that the shorter side of the rectangle is facing forwards.
- a first actuator in the form of a spring (13) is connected at one end to an attachment portion (14) on the slider.
- the attachment portion (14) is pivotally secured to the slider (5) near the front end.
- the other end of the spring (13) is attached to a trigger (15) at a trigger attachment portion (50).
- the trigger (15) is pivotally mounted to the coupler body (2) by an axle (16) that extends from the edges of the trigger (15).
- the axle (16) sits within apertures (see for example Fig. 6B) in the coupler body (2) so as to pivotally secure the trigger (15) to the coupler body (2).
- a trigger locking mechanism in the form of a member (18) extends away from the trigger's body (17). The trigger locking mechanism is configured to operate in conjunction with the beam (26).
- the locking member (18) includes a first portion (19) and a second portion (20).
- the second portion is in the form of a ledge extending downward from the locking member. In use the ledge (20) engages with the beam (26) to lock and/or unlock the slider with respect to the coupler body.
- An underside (21) of the trigger's body (17) provides an engagement portion (21) which extends between the axle (16) and the second portion (20).
- An upward force applied to the engagement portion (21) causes the trigger's body (17) to rotate around the axle (16). This rotation lifts the ledge (20) up the longer rear side of the beam onto the ramp. This action releases the slider to move forward with respect to the coupler body.
- the beam (26) has passed beneath the ledge (20) the rear side of the ledge drops down over the forward side of the beam into an indent, which may prevent the slider from moving and releasing the pins (until the locking mechanism is reset).
- the slider (5) includes a hook (22).
- the hook (22) provides a point at which the slider (5) may be engaged so as to move that along the length of channels (4).
- the hook (22) is orientated to extend in an upwards direction in the coupler (1) normal orientation in use of the coupler (1).
- the hook (22) can take other shapes and/or orientations.
- the work attachment includes a first pin (23) and a second pin (24) as should be known to one skilled in the art.
- the work vehicle is used to manoeuver the coupler (1) so that the first pin (23) is inserted into the immovable jaw (9) (i.e. the first engagement portion).
- the coupler body is typically inclined with respect to the two pins of the work attachment, as shown in Fig. 6A, so that only the first pin is engaged with the coupler.
- the next step involves rotating the coupler body (2) so that the second pin (24) is bought into contact with the second engagement portion (25) on the underside of the coupler body (2). In doing so, the second pin (24) is bought into contact with the engagement portion (21) of the trigger's body (17). This causes the trigger (15) to pivot about the axle (16) thus moving the ledge (20) up the rear face of the beam (26) onto the ramp of the beam allowing the slider to move. This is illustrated in Fig. 6B.
- the stored energy in the compressed spring (13) applies a force between the trigger attachment portion (50) (which is essentially fixed relative to the coupler body) and the attachment portion (14) at the front of the slider body.
- the force causes the slider (5) to move along the channels (4) towards the first fixed jaw (9) in the direction shown by arrow (27) in Figure 6C.
- the spring (13) moves the slider (5) into the position shown in Figure 6D.
- the first locking portion (7) is bought into a position in which it engages the first pin (23).
- the first locking portion (7) reduces the opening of the jaw (9) to thereby secure the first pin (23) in the jaw (9).
- the spring (13) exerts a force against the trigger (17) causing it to rotate about axle (17) in the direction shown by arrow (27) in Figure 6D.
- This causes the ledge (20) to bear against the front side of the beam (26).
- the locking mechanism prevents the slider (5) moving backwards, which could disengage (release) the first pin (23) and the second pin (24).
- This is an engaged (locked) position for the coupler (1).
- the locking portions (7, 8) have engaged the first and second pins (23, 24).
- the locking mechanism (20, 26) may reduce or prevent movement of the slider (5).
- FIGS 7, 8, 9, 10, and 11 show a coupler (28) which is similar to that described above (and in Figures 1-6), but including a second activator configured to move the slider back into the disengaged position, in the process compressing the coil spring and resetting the trigger
- the second actuator (37) is in the form of a hydraulic cylinder including a housing (38) and ram (39).
- the hydraulic cylinder (37) is connected to a hydraulic control system (not shown in the Figures) as should be understood by one skilled in the art.
- the hydraulic cylinder (37) is located in the front portion of the slider.
- Rods (40) extend from the side of the housing (38).
- the rods (40) are configured to sit within transverse channels (36) near the front end of the slider (32), so that the hydraulic cylinder can pivot about the rods (40).
- the ram (39) includes a mounting (42) configured to connect the second actuator (37) to the trigger (30).
- the first actuator in the form of a coil spring (43), is wound around the ram (39) between the housing (38) and the mounting (42).
- the hydraulic cylinder is configured to retract the ram into the cylinder when pressure is applied (i.e. shorten the distance between the hydraulic cylinder and the trigger).
- the effective action of the coil spring is to exert a force against the trigger counteracting the force applied by the hydraulic cylinder as it retracts.
- Figures 9 and 10 show this embodiment of the coupler in the engaged position.
- the trigger (30) is held against the rear face of the locking mechanism preventing forward movement of the slider under the action of the coil spring (13). In this position there is no pressure applied to the hydraulic cylinder.
- the hydraulic cylinder is configured to retract the ram (39) into the cylinder body (38) when pressure is applied. This does several things: firstly it pulls the trigger (30) towards the front of the coupler body causing the trigger to rotate and release the locking mechanism from the beam (35) of the locking mechanism; secondly after the initial rotation of the trigger further retraction of the ram pulls the slider towards the trigger, thus moving the slider backwards with respect to the coupler body and into the release position in which the first locking portion (33) and a second locking portion (34) do not engage pins on a work attachment; and thirdly it compresses the coil spring, all as shown in Fig. 11.
- the hydraulic system is configured to release the pressure to the hydraulic cylinder when the slider reaches the full release position. This allows the coil spring (13) to push against the trigger (30), which is no longer pulled by the ram, thus initially causing the trigger to rotate towards the rear of the slide where it engages with the front face of the beam (35) of the locking mechanism, preventing further movement towards the rear.
- the coupler (28) of this embodiment therefore includes a mechanism to cause automatic engagement of the first and second pins (23, 24) on the work attachment when a designated pin is bought into a position relative to the coupler body (29). Furthermore, the coupler (28) can subsequently be moved to a disengaged position through activation of the second actuator, thereby releasing the work attachment, without the operator exiting the work vehicle.
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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)
- Shovels (AREA)
- Agricultural Machines (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2014370524A AU2014370524A1 (en) | 2013-12-24 | 2014-12-17 | Improvements to couplers |
GB1612507.2A GB2541536B (en) | 2013-12-24 | 2014-12-17 | Improvements to couplers |
US15/107,946 US20160319508A1 (en) | 2013-12-24 | 2014-12-17 | Improvements to couplers |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NZ619300 | 2013-12-24 | ||
NZ61930013 | 2013-12-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015099543A1 true WO2015099543A1 (en) | 2015-07-02 |
Family
ID=53479277
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NZ2014/000246 WO2015099543A1 (en) | 2013-12-24 | 2014-12-17 | Improvements to couplers |
Country Status (4)
Country | Link |
---|---|
US (1) | US20160319508A1 (en) |
AU (1) | AU2014370524A1 (en) |
GB (1) | GB2541536B (en) |
WO (1) | WO2015099543A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170067223A1 (en) * | 2014-06-26 | 2017-03-09 | Komatsu Ltd. | Quick coupler |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2505703A (en) * | 2012-09-10 | 2014-03-12 | Geith Internat Ltd | A locking mechanism for use in a quick hitch coupling |
CN108487350B (en) * | 2018-04-13 | 2023-11-21 | 新兴移山(天津)重工有限公司 | Mechanical bogie frame |
US11208785B2 (en) | 2018-12-12 | 2021-12-28 | Caterpillar Inc. | Tool coupling arrangement having zero offset |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030204972A1 (en) * | 2001-12-06 | 2003-11-06 | Cunningham Bartholomew James | Coupler for coupling an accessory to a dipper arm and a control system for such a coupler |
US20090282712A1 (en) * | 2008-05-15 | 2009-11-19 | Pruszynski Edwin | Coupler for excavating machines and the like |
GB2463298A (en) * | 2008-09-09 | 2010-03-10 | Miller Uk Ltd | A coupler for an excavator |
WO2010062193A1 (en) * | 2008-11-03 | 2010-06-03 | Doherty Engineered Attachments Limited | Improvements to work attachment assemblies |
WO2011071394A1 (en) * | 2009-12-09 | 2011-06-16 | S T Couplers Limited | Improvements relating to couplers |
-
2014
- 2014-12-17 GB GB1612507.2A patent/GB2541536B/en not_active Expired - Fee Related
- 2014-12-17 AU AU2014370524A patent/AU2014370524A1/en not_active Abandoned
- 2014-12-17 WO PCT/NZ2014/000246 patent/WO2015099543A1/en active Application Filing
- 2014-12-17 US US15/107,946 patent/US20160319508A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030204972A1 (en) * | 2001-12-06 | 2003-11-06 | Cunningham Bartholomew James | Coupler for coupling an accessory to a dipper arm and a control system for such a coupler |
US20090282712A1 (en) * | 2008-05-15 | 2009-11-19 | Pruszynski Edwin | Coupler for excavating machines and the like |
GB2463298A (en) * | 2008-09-09 | 2010-03-10 | Miller Uk Ltd | A coupler for an excavator |
WO2010062193A1 (en) * | 2008-11-03 | 2010-06-03 | Doherty Engineered Attachments Limited | Improvements to work attachment assemblies |
WO2011071394A1 (en) * | 2009-12-09 | 2011-06-16 | S T Couplers Limited | Improvements relating to couplers |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170067223A1 (en) * | 2014-06-26 | 2017-03-09 | Komatsu Ltd. | Quick coupler |
US9903091B2 (en) * | 2014-06-26 | 2018-02-27 | Komatsu Ltd. | Quick coupler |
Also Published As
Publication number | Publication date |
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GB201612507D0 (en) | 2016-08-31 |
US20160319508A1 (en) | 2016-11-03 |
AU2014370524A1 (en) | 2016-08-04 |
GB2541536A (en) | 2017-02-22 |
GB2541536B (en) | 2020-06-17 |
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