WO2007038960A1 - Safety system to avoid unexpected release of an implement from a quick coupling device connected to a working arm of an earth-moving vehicle. - Google Patents
Safety system to avoid unexpected release of an implement from a quick coupling device connected to a working arm of an earth-moving vehicle. Download PDFInfo
- Publication number
- WO2007038960A1 WO2007038960A1 PCT/EP2005/010644 EP2005010644W WO2007038960A1 WO 2007038960 A1 WO2007038960 A1 WO 2007038960A1 EP 2005010644 W EP2005010644 W EP 2005010644W WO 2007038960 A1 WO2007038960 A1 WO 2007038960A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- safety system
- coupling device
- nut screw
- fact
- implement
- 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
- E02F3/3618—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
- E02F3/3636—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat using two or four movable transversal pins
-
- 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
- E02F3/3659—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat electrically-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
- E02F3/3663—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
- E02F3/3668—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat where engagement is effected by a mechanical lever or handle
-
- 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
- E02F3/3672—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat where disengagement is effected by a mechanical lever or handle
Definitions
- the gear wheel 8 is moved by another gear wheel 9 of smaller diameter so that to constitute a speed reducer operated by an electric, hydraulic or pneumatic motor.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Shovels (AREA)
Abstract
The safety system is applied to the device that causes the movement of the mobile jaws of a quick coupling device that hooks the pins (19.2) of an implement. It is based on the application of a small threaded shaft (1) whose two not threaded ends (2.1 and 2.2), idle in two bushings (3.1 and 3.2) integral to the structure of the quick coupling device. The not threaded end (2.2) is integral with a nut (4) that permits the rotation of the small shaft but not its axial movement when, through the opposite end (2.1), it is subjected, by a speed reducer, to a twisting moment. The rotation of the shaft (1) causes the axial movement along the axis K-K of a nut screw (16) integral to the mobile jaws (18), that hook the pins (19.2) of the implement. The stress transmitted by the implement during its application are discharged on the structure constituted by the plates (12, 13, 14) and of the quick coupling device, through the nut screw (16).
Description
Safety system to avoid unexpected release of an implement from a quick coupling device connected to a working arm of an earth-moving vehicle
The invention concerns a device or a system to make secure, automatic and at the same time irreversible, during its use, the locking of an implement to a working arm of an excavator or other earth moving vehicle: the implement can also be a percussion tool, such as an hydraulic or pneumatic demolishing hammer, a bucket of any type, and so on.
The quick coupling device permits an easy hooking and unhooking of buckets and other implements from the working arm of an excavator or other self moving vehicle. At this aim the quick-coupling device can be furnished with two jaws, one being fixed and the other mobile, having a U-section, opposite one to the other, hooked to the two pivots of the implement by the pressure of an hydraulic piston or other suitable means on the mobile jaw.
In another execution the quick-coupling device is not provided with jaws but with pivots that are inserted in the fixed jaws integral with the implement to lock: the quick- coupling device is also provided with a couple of pivots each operated by a piston that definitely locks the implement.
A main problem in the application of quick coupling devices is to make secure the hooking of the implement or tool during its use, that is make unexpected release impossible. The figures illustrating the prior art show some devices provktedΛvith manual or automatic action to resolve the above mentioned problem: figures 1, 2 and 3 - A quick-coupling device operated manually by means of a screw to properly hook and lock the implement: first phase, hooking of one pin (figure 1), second phase, hooking of both pins (figure 2), a back view on the side of the mobile jaw, that is of the locking device (figure 3);
figure 4 - a quick coupling device operated by means of an hydraulic piston with safety pin to avoid unexpected release; figure 5 - a quick coupling device operated manually with a safety and locking screw, in engaged position; figures 6, 7 and 8 - a quick coupling device without jaws but provided with pins to be inserted in the jaws of the tool: before the hooking (figure 6), during hooking (figure 7) and after hooking (figure 8).
The device in figures 1, 2 and 3, is manually operated by rotating a screw V causing the movement of the mobile jaw GM reactioned by the spring M, in order to hook the pin Pl of the implement.
The head of the screw V is integral with a small plate P that, according to its positioning, permits the hooking or unhooking of the mobile jaw GM from the pin Pl.
Figure 4 shows a device provided with an hydraulic pin Pl that moves the mobile jaw GM in hooking position of the pin Pl. This device needs a safety pin PS in order to assure the engagement of the mobile jaw
GM.
The gap between the safety pin PS and the mobile jaw GM must not exceed a determined value: if the gap exceed mm. 2 of thickness, it will be necessary to weld one or more small plates T on the mobile jaw, in order to eliminate the gap and to avoid any unexpected release.
Figure 5 illustrates a manual quick-coupling device in which the mobile jaw GM, needs also a safety pin.
The release of the mobile jaw GM is carried out by means of a lever L that, acting on a fulcrum F, makes the jaw rotate in order to unhook it from the pin Pl.
The main drawback of the two above mentioned quick coupling embodiments is the fact that the safety pin PS must be manually inserted by the operator.
Figures 6, 7 and 8 illustrate another embodiment of a quick coupling device in which the jaws G are integral to the equipment; in this embodiment the safety system is guaranteed by a complicated and expensive device D that requires the application of a complex automatism based on electronic technology.
All the above mentioned quick coupling devices or others similar, do not guarantee the irreversibility of the tool locking and the possibility of an unexpected release of the tool, if not with the manual insertion of mechanical blocking means: these means are however not functional.
Main aim of the present invention is to ehminate the above mentioned and other not mentioned drawbacks, that is to furnish a safety system that securely prevents the unexpected release of the tool from the quick coupling device and at the same time makes its application easy by means of an automatism operated from the driver's place of the excavator or of the self moving vehicle.
Another aim of the present invention, is to furnish a safety system applied to a quick- coupling device, being irreversible during its working but automatically reversible during the release operation.
Another aim of the present invention, is to furnish a safety system that transmits continuous vibrations and stress, caused by the implement, directly to the structure of the quick-coupling device, without stressing the hooking and unhooking means.
Further aim of the present invention is to furnish a safety device provided with a safety system that, in case of breakdown, may be also manually operated.
An important advantage of the present invention is the major safety of the quick- coupling device however used and the major duration.
The present invention is exposed in detail moreover in the drawings representing a preferred embodiment, that is: figures 9 e 10 - A functional arrangement of the application of the safely system according to the present invention to a quick-coupling device, in release position (figure 9) and in hooking position (figure 10); figure 11 - A preferred embodiment of a quick-coupling device in which the jaws are operated by the safety system according to the invention, with jaws in release position; figure 12 - The safety system in figure 11, with the mobile jaw in hooking position; figure 13 - An axonometric view of the quick coupling device provided with the motorized security device according to the invention; figure 14 - The quick coupling device of figure 13 with parts partially removed; figure 15 - The quick coupling device provided with the safety system according to the invention, connected to the working arm of the excavator, before the hooking of the bucket; figure 16 - The safety system of the quick coupling device after the hooking of the bucket; figure 17 - A sectional view along the line X-X of figure 16 in which are shown the pins for the engagement respectively to the working arm of the excavator and to the implement; figure 18 - A sectional view along the line Y-Y of figure 12 in which is shown the small threaded shaft not subjected to motion of translation, and the nut screw connected to the mobile jaws.
As illustrated in figures 9 and 10, the main component of the safety device is a small , threaded shaft 1, whose two ends not threaded 2.1 and 2.2 are inserted into two bushings, respectively 3.1 and 3.2, in which they idle.
The not threaded end 2.2 of the small threaded shaft 1 is integral, in its end, with an hexagonal nut 4 that avoids its axial movement but not its rotation; the bushing 3.2 is integral with a vertical plate 5 of the quick coupling device.
The other not threaded end 2.1 of the small shaft, idling into the bushing 3.1, is connected to a gear wheel 8.
The axial connection between the gear wheel 8 and the not threaded end 2.1 of the small threaded shaft is assured by fit means, however such detachable means to be allowed the release of the small shaft 1 for possible maintenances.
The gear wheel 8 is moved by another gear wheel 9 of smaller diameter so that to constitute a speed reducer operated by an electric, hydraulic or pneumatic motor.
In case of breakdown of the system that operates the speed reducer it is possible to manually operate the safety system of the quick coupling device of the present invention, by means of an appropriate wrench C applied on the hexagonal nut 4 of the small threaded shaft 1 (see fig. 12). As shown in figures 11 and 12, the bushing 3.1, of the extremity 2.1. of the small threaded shaft 1, is sustained by a support 11 integral with the horizontal plate 12 welded to the two vertical plates 13.
The plates 13 are superiorly welded to another horizontal plate 14 and inferiorly to a further underlying plate 15; they constitute the framework of the quick coupling device. The plates 14 and 15 are finally vertically connected by the plate 5 that acts as a support to the bushing 3.2 in which the extremity 2.1 of the small threaded shaft 1 rotates.
The small threaded shaft 1 rotates in a nut screw 16 made up of a single casing of a parallelepipedal form, furnished with a hollow threaded cavity.
As shown in the axonometric view of figures 13 and 14, the nut screw 16 is integral to two vertical plates 17 that form inferiorly the mobile jaws 18; each plate 17 is provided with:
a plain vertical surface 17.1 sliding on the surface 13.1 of the vertical plate 13 of the coupling device, a horizontal surface 17.2 sliding on the horizontal plate 12 integral to the vertical plate 13, and a further horizontal surface 17.3 sliding on the plate 15 incorporated on said structures. The nut screw can only make a translation motion along the small threaded shaft 1 but cannot rotate, being welded along its vertical surfaces 6.1 and 6.2 (see fig. 18) to the vertical plates 17 that form the mobile jaws 18, restrained to slide on the vertical surfaces 13.1 of the plates 13, in order to prevent the rotation of the nut screw 16 around the axis K-K of the small threaded shaft 1. The small threaded shaft 1 can only rotate around its own axis K-K and not be subjected to motion of translation, whilst on the contrary the nut screw 16 is subjected to motion of translation being for it impossible to rotate, moving in this way the jaws 18 in order to bring them in hooking position to the pins 19.2 of the tool.
The movement of the nut screw 16 compared to the small threaded shaft 1 is irreversible because it can move in both direction only when the small threaded shaft rotates in the sense conjugated wise to that of the movement of the nut screw: for example a clockwise rotation of the small threaded shaft causes an advancement of the nut screw whilst the anticlockwise rotation causes a withdrawal of the nut screw.
Therefore the irreversibility of the device is linked to the functioning of the small threaded shaft 1, moving axially the nut screw in which it rotates, only when the same nut screw is restrained to the system in which the device is inserted, so that it cannot rotate around the axis K-K.
The schematic figures 11 and 12 illustrate the quick-coupling device provided with the safety system according to the invention.
In said figures are shown the two limit positions that the nut screw can assume together with the mobile jaws: the initial position (figure 11) in which the nut screw is near the bushing 3.1 and the mobile jaws 18 are in the release position, and the final position
(figure 12) in which the nut screw is near the bushing 3.2 and the mobile jaws are in hooking position of the pins 9.2 of the implement.
Figures 15 and 16 illustrate the application of the safety system, on the quick coupling device connected to the working arm BA of an excavator in the two limit positions above mentioned, the initial position of the hooking of a bucket B (figure 15) and the final position after hooking the bucket (figure 16). Figure 17 illustrates a sectional view along the line X-X of figure 16 in correspondence of the fixed jaws 7, in which are noticed the pin 19.1 of the bucket B for the locking of the fixed jaws, and the pin 20.1 that locks the working arm BA of the excavator to the locking plate 21 of the quick-coupling device.
Figure 18 illustrates a sectional view along the line Y-Y of figure 12 in which is evident the nut screw 16 and the small threaded shaft 1 moving the nut screw; the welding 22 put in evidence the constraint between the vertical plates 17 connected to the mobile jaws and the vertical surfaces 6.1 and 6.2 of the nut screw.
Furthermore said figures evidences the sliding constraint between the vertical surfaces 7.1 and the vertical plates 17, integral to the nut screw, and the internal surfaces 13.1 of the vertical plates 13.
The unexpected release of the tool from the quick-coupling device is impossible due to the presence of the nut 4 that does not permit the unthreading of the small threaded shaft 1 integral to the nut screw 16, avoiding therefore the unexpected opening of the mobile jaws 8.
Claims
1) "Safety system to avoid unexpected release of an implement from a quick-coupling device connected to a working arm of an earth-moving vehicle" characterized by: - a small threaded shaft (1) whose two ends (2.1) (2.2) are not threaded so that they may idle in two bushings (3.1) (3.2) suitably supported by the frame of the quick-coupling device so that the small threaded shaft (1) can only rotate around its own axis K-K and not be subjected to axial motion of translation during its rotation, and - a nut screw (16) acting as a female thread restrained to the frame of the quick- coupling device in order to only axially slide but not rotate around the same axis K-K of said small threaded shaft (1).
2) Safety system according to claim 1) characterized by the fact that one of the not threaded ends (2.2) of the small threaded shaft (1) is integral with a nut (4) that, sliding on a interposed transversal plate (5) of the frame, permits the rotation of said small shaft around its axis K-K but not its axial movement.
3) Safety system according to claims 1) and 2) characterized by the fact that the not threaded end (2.1), opposite to the threaded end (2.2), is connected to a gear wheel (8) of a speed reducer operated by an electric, hydraulic or pneumatic motor (10). 4) Safety system according to claims 2) and 3) characterized by the fact that, alternatively to the automatic driving, the rotation of the small threaded shaft (1) can be carried out manually by means of a wrench (C) applied on the nut (4) integral with said small threaded shaft (1).
5) Safety system as claimed in claim 1) characterized by the fact that the surfaces that cause the longitudinal sliding of the nut screw (16), not permitting rotation around
its own axis K-K5 consists of two vertical plates (13) and three horizontal plates (12) (14) and (15) connecting them, the plates (13) (12) (14) and (15) acting also as sliding surfaces of the vertical plates (17) forming the inferior mobile jaws (18), integral with the nut screw (16). 6) Safety system according to claims 1) and 5) characterized by the fact that the external longitudinal upper surfaces (6.3) and lower surfaces (6.4) of the nut screw are perfectly smooth, to reduce the sliding friction that is verified when they slide on the flat surfaces respectively opposed (14) and (15) of the frame of the quick coupling device, preventing the rotation around the axis K-K. 7) Safety system according to previous claims characterized by the fact that the mobile jaws (18) hooking the pin (19.2) of the implement, moves only in the direction in which the nut screw moves, hooking or unhooking the implement.
8) Safety system as in previous claims characterized by the fact that the nut screw (16) can only translate along its own axis K-K, but cannot rotate in synchronism with the small threaded shaft (1), being the nut screw restrained to the frame of the quick coupling device by means of plates (13), (14) and (15)
9) Safety system according to claim 5) characterized by the fact that the plates (13) are integral with the plates (21) that permit the hooking to the pivots (20.1) (20.2) of the working arm (BA) 10) Safety system according to claims 5) and 9) characterized by a device that facilitates the lubrication of the sliding surfaces of the mobile jaws integrated with the nut screw.
11) Safety system according to previous claims characterized by the fact that the stress transmitted during the use from the implement to the nut screw, in which the small
threaded shaft rotates, are absorbed and transmitted to the structure of the quick coupling device.
12) Safety system according to previous claims characterized by the fact that the nut screw (16) is made up of a single casing threaded inside.
13) Safety system according to previous claims characterized by the fact that the safety device does not require other traditional or automatic blocking means to avoid unexpected unhooking from the mobile jaws (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2005/010644 WO2007038960A1 (en) | 2005-10-03 | 2005-10-03 | Safety system to avoid unexpected release of an implement from a quick coupling device connected to a working arm of an earth-moving vehicle. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2005/010644 WO2007038960A1 (en) | 2005-10-03 | 2005-10-03 | Safety system to avoid unexpected release of an implement from a quick coupling device connected to a working arm of an earth-moving vehicle. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007038960A1 true WO2007038960A1 (en) | 2007-04-12 |
Family
ID=36423531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2005/010644 WO2007038960A1 (en) | 2005-10-03 | 2005-10-03 | Safety system to avoid unexpected release of an implement from a quick coupling device connected to a working arm of an earth-moving vehicle. |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2007038960A1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2446485A (en) * | 2007-10-18 | 2008-08-13 | Conor Monaghan | A coupler |
| EP2192239A1 (en) * | 2008-12-01 | 2010-06-02 | M. Valéry Dorguin | Device for coupling and uncoupling an equipment item or a tool to the jib of a civil engineering and/or handling machine. |
| ITGE20090003A1 (en) * | 2009-01-23 | 2010-07-24 | Gianluca Malacrino | QUICK ATTACHMENT DEVICE, PARTICULARLY FOR OPERATING MACHINES |
| ITMC20090137A1 (en) * | 2009-06-10 | 2010-12-11 | Libetti Trade S R L | HOOKING DEVICE FOR MACHINE TOOLS TOOLS. |
| GB2505703A (en) * | 2012-09-10 | 2014-03-12 | Geith Internat Ltd | A locking mechanism for use in a quick hitch coupling |
| WO2015065205A3 (en) * | 2013-10-31 | 2016-03-03 | Wedgelock Equipment Limited | A lock mechanism |
| FR3027037A1 (en) * | 2014-10-13 | 2016-04-15 | Groupe Mecalac | TOOL HOLDER FOR CONSTRUCTION OR PUBLIC WORKS EQUIPMENT |
| EP3382103A3 (en) * | 2017-03-08 | 2019-02-27 | Kinshofer GmbH | Rapid coupling |
| CN111236342A (en) * | 2020-01-13 | 2020-06-05 | 南京工程学院 | Control system and method for running speed of land leveler |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2238035A (en) * | 1989-11-11 | 1991-05-22 | Christopher John * Littler | Coupling |
| GB2251592A (en) * | 1990-12-01 | 1992-07-15 | Roberts & Griffiths | Attachment means |
| GB2295812A (en) * | 1994-12-08 | 1996-06-12 | Gary Miller | Coupling Device |
-
2005
- 2005-10-03 WO PCT/EP2005/010644 patent/WO2007038960A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2238035A (en) * | 1989-11-11 | 1991-05-22 | Christopher John * Littler | Coupling |
| GB2251592A (en) * | 1990-12-01 | 1992-07-15 | Roberts & Griffiths | Attachment means |
| GB2295812A (en) * | 1994-12-08 | 1996-06-12 | Gary Miller | Coupling Device |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8678697B2 (en) | 2007-10-18 | 2014-03-25 | Conor Monaghan | Couplers and vehicles provided with couplers |
| GB2446485B (en) * | 2007-10-18 | 2009-01-14 | Conor Monaghan | A coupler |
| GB2446485A (en) * | 2007-10-18 | 2008-08-13 | Conor Monaghan | A coupler |
| EP2192239A1 (en) * | 2008-12-01 | 2010-06-02 | M. Valéry Dorguin | Device for coupling and uncoupling an equipment item or a tool to the jib of a civil engineering and/or handling machine. |
| FR2939159A1 (en) * | 2008-12-01 | 2010-06-04 | Valery Dorguin | DEVICE FOR COUPLING AND DECOUPLING EQUIPMENT OR TOOL TO A CIVIL ENGINE MACHINE ARROW AND / OR HANDLING |
| ITGE20090003A1 (en) * | 2009-01-23 | 2010-07-24 | Gianluca Malacrino | QUICK ATTACHMENT DEVICE, PARTICULARLY FOR OPERATING MACHINES |
| WO2010084012A1 (en) | 2009-01-23 | 2010-07-29 | Gianluca Malacrino | Quick coupling device for work vehicles and machines in general |
| ITMC20090137A1 (en) * | 2009-06-10 | 2010-12-11 | Libetti Trade S R L | HOOKING DEVICE FOR MACHINE TOOLS TOOLS. |
| GB2505703A (en) * | 2012-09-10 | 2014-03-12 | Geith Internat Ltd | A locking mechanism for use in a quick hitch coupling |
| WO2015065205A3 (en) * | 2013-10-31 | 2016-03-03 | Wedgelock Equipment Limited | A lock mechanism |
| FR3027037A1 (en) * | 2014-10-13 | 2016-04-15 | Groupe Mecalac | TOOL HOLDER FOR CONSTRUCTION OR PUBLIC WORKS EQUIPMENT |
| EP3009570A1 (en) * | 2014-10-13 | 2016-04-20 | Groupe Mecalac | Tool holder for a construction or public works vehicle |
| WO2016059328A1 (en) * | 2014-10-13 | 2016-04-21 | Groupe Mecalac | Tool holder for a work vehicle or construction machine |
| US10815635B2 (en) | 2014-10-13 | 2020-10-27 | Groupe Mecalac | Tool holder for a work vehicle or construction machine |
| EP3382103A3 (en) * | 2017-03-08 | 2019-02-27 | Kinshofer GmbH | Rapid coupling |
| CN111236342A (en) * | 2020-01-13 | 2020-06-05 | 南京工程学院 | Control system and method for running speed of land leveler |
| CN111236342B (en) * | 2020-01-13 | 2022-03-29 | 南京工程学院 | Control system and method for running speed of land leveler |
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