WO2025165947A1

WO2025165947A1 - Wear assembly

Info

Publication number: WO2025165947A1
Application number: PCT/US2025/013720
Authority: WO
Inventors: Boyan K. BAHNEV
Original assignee: Esco Group LLC
Current assignee: Esco Group LLC
Priority date: 2024-01-31
Filing date: 2025-01-30
Publication date: 2025-08-07
Anticipated expiration: 2026-07-31

Abstract

A wear assembly includes a base having a first surface with an aperture and a wear part having a wear surface and an opposing attachment surface for securing to the first surface of the base and a capture assembly. The capture assembly includes a pin and a cartridge. The cartridge may be housed within an aperture of the base. The attachment surface includes the pin that is captured within the cartridge when the pin is inserted into a hole of the cartridge. In some examples, the cartridge includes a bushing in a first position. When the pin is inserted, the bushing engages the pin and compresses to a second position and returns to the first position to capture the pin.

Description

WEAR ASSEMBLY

RELATED APPLICATIONS

[0001] This application claims priority benefits to U.S. Provisional Patent Application No. 63/627,619, filed January 31 , 2024, and entitled “Wear Assembly,” which is incorporated herein by reference in its entirety.

Field of the Disclosure

[0002] The present disclosure pertains to a wear assembly for securing a wear part to earth working equipment.

Background

[0003] Wear parts are commonly attached to earth working equipment to protect the equipment from wear. For example, wear plates, runners, buttons, and wear tiles can be attached to the bases or support structures for earth working equipment. These kinds of wear parts are commonly subjected to harsh conditions and repeated loading. Accordingly, the wear parts wear out over a period of time and need to be replaced.

Summary of the Disclosure

[0004] The present disclosure pertains to an improved wear assembly for securing wear parts to a base, such as buckets or earth working equipment.

[0005] In one example, a wear assembly includes a base having a first surface with an aperture, a wear part having a wear surface and an opposing attachment surface for securing to the first surface of the base, and a capture assembly. The capture assembly includes a pin and a cartridge. The cartridge or pin is housed within the aperture of the base The capture assembly is located on the attachment surface. The cartridge or pin is captured within the pin or cartridge when the pin is inserted into a hole of the cartridge. In some examples, the cartridge includes a bushing in a first position. When the pin is inserted, the bushing engages the pin and compresses the bushing to a second position and then returns to the first position to capture the pin.

[0006] In some of those examples, the base is earth working equipment. In some examples, the base is a bucket. In another example, the base is a portion of a vibratory or rotary screen. [0007] In another example, a wear assembly includes a base having a first surface and a wear part having a wear surface and an opposing attachment surface for securing to the first surface of the base. The attachment surface includes a pin and a tool engagement surface adjacent the pin. In one example, the tool engagement surface is ramped vertically. In other examples, the tool engagement surface is a first tool engagement surface with a second tool engagement surface ramped vertically and converging centrally with the first tool engagement surface.

[0008] In a further example, a wear part includes a wear surface and an opposing attachment surface for securing to a base. The attachment surface includes a pin and a tool engagement surface adjacent the pin. In one example, the tool engagement surface is ramped vertically. In other examples, the tool engagement surface is a first tool engagement surface with a second tool engagement surface ramped vertically and converging centrally with the first tool engagement surface.

[0009] In yet another example, a wear part includes a wear surface and an opposing attachment surface for securing to a base and a capture assembly. The capture assembly includes a pin and a cartridge. The cartridge or pin is housed within the aperture of the base. The attachment surface includes the cartridge or the pin that is captured within the cartridge when the pin is inserted into a hole of the cartridge. In some examples, the cartridge includes a bushing in a first position. When the pin is inserted, the bushing engages the pin and compresses the bushing to a second position and then returns to the first position to capture the pin.

[0010] In one example, a method of removal of a wear part from a base, the method including providing a wear part having a wear surface and an opposing surface, the opposing surface including a tool engaging surface and a capture assembly. The capture structure including a pin and a cartridge. The method further includes a tool engaging the tool engaging surface located adjacent the capture assembly and applying a vertical force to create a pull off force between the wear part and a base, the force breaking the connection of the pin from the cartridge that holds the wear part to the base.

[0011] In another example, a tool for removing a wear part includes two elongate bodies each with a hook component to create a claw for attachment to two tool engaging surfaces located on an attachment surface of the wear part. The two elongate bodies being connected with a rotatable rod that controls the distance between the hook components from one another. In some cases, the rod being separately rotatable by a wrench.

[0012] In yet another example, a wear assembly includes a base having a first surface, a wear part having a wear surface and an opposing attachment surface for securing to the first surface of the base, and a capture assembly. The capture assembly includes a pin and a cartridge.

[0013] In a preferred construction of the present invention, it is easy to manufacture, requires reduced maintenance, and provides an easy replacement solution. The inventive system reduces wear on the underlying base or equipment and allows for the re-use of capture assemblies. The present invention uniquely provides a mechanical wear part solution for vibratory or rotatory screens without the use of welding material to the base. [0014] The present inventive system is further able to mechanically attach the wear part by the introduction of a cartridge within holes in the equipment. Additionally, it creates a wearable surface for equipment and resists loss due to unintended loosening of fastening means.

[0015] The various features of the above-noted examples can be used independently of each other or collectively with all or some of the distinctive features in securing a wear member to a base. The noted features are exemplary summary observations of certain ideas of the various concepts of the disclosure and are not intended to be exhaustive or essential and features may be combined as appropriate. The foregoing and other objectives, features, and advantages of the disclosed examples will be more readily understood in view of the following detailed description of certain examples and the accompanying drawings. Understanding that the drawings depict only certain examples and are not, therefore, to be considered limiting in nature, these examples will be described and explained with additional specificity and detail.

Brief Description of the Figures

[0016] FIG. 1A is a perspective view of plurality of a wear tile assemblies on a screen.

[0017] FIG. 1 B is a perspective view of a plurality of wear assemblies on a bucket.

[0018] FIG. 2 is an exploded view of a wear tile assembly and base of FIG. 1A.

[0019] FIG. 3A is bottom perspective view of the wear tile assembly of Fig. 1A.

[0020] FIG. 3B is bottom perspective view of an alternate wear tile assembly.

[0021] FIG. 4 is an exploded view of the wear tile and pin of FIG 1A.

[0022] FIG. 5 is a perspective view of a cartridge of FIG. 2.

[0023] FIG. 6 is an exploded view of the cartridge of FIG. 5.

[0024] FIG. 7 is a bottom view of a cartridge in the base of FIG. 1A.

[0025] FIG. 8A is a cross section view of the wear tile assembly of FIG. 2 in an uninstalled position taken along line 8A-8A.

[0026] FIG. 8B is a cross section view of the wear tile assembly of FIG. 1 A with bushings in a compressed state.

[0027] FIG. 8C is a cross section view of the wear tile assembly of FIG. 1A in an installed position taken along line 8B-8B.

[0028] FIG. 9 is a perspective view of a tool used in removal of the wear assembly.

[0029] FIG. 10 is a cross section view of the wear tile assembly of FIG. 1A with the tool of FIG. 8 in the process of removal of the wear tile from the cartridge by engaging the tool engagement surfaces.

Detailed Description

[0030] FIG. 1A illustrates a wear system 1 including a plurality of wear assemblies 5 on a base (e.g., a portion of a vibratory screen, a bucket surface, a chute surface, and the like) or a support structure (e.g. a rail, adapter, and the like) for protecting the base 3 while moving earthen material. In the illustrated example, the wear assemblies 5 include wear bars or tiles 2 secured to the base 3. Other uses are possible. Referring to FIG. 1 B, which illustrates a wear system 1 ’ including a plurality of wear assemblies 5’ on a base 3’ in the form of working implement, e.g., a bucket 3’ attached to an earth working equipment 4’. In the illustrated example, the wear assemblies 5’ are buttons. Wear assemblies could be secured to other earth working equipment such as truck trays, etc. In this application, relative terms such as upper, lower, inner, outer, forward, rearward, up, down, vertical, or horizontal are used for convenience of explanation; other orientations are possible. For the ease of discussion, the wear tile 2 of FIG 1A will be further discussed below.

[0031] In the example of FIG. 2 and 3A, a wear assembly 5 includes a wear part 2 that attaches onto a support structure or base 3 to protect the base or underlying sub-structure from wear and/or corrosion. The wear assembly 5 may also be generally referred to as a quick connect wear tile assembly in view of its ability to be quickly installed, removed, and replaced without welding the wear part to the base. In the illustrated example, the wear part is a wear tile 2 and the base 3 is a portion of a vibratory screen, but other configurations are possible. In one example, the wear part may be secured to a base, where the base is affixed or secured to the equipment by, for example, brazing, welding, soldering, epoxy, adhesive, infiltrated, mechanically fastened, or may be cast as a component of the underlying equipment.

[0032] The wear tile 2 is rectangularly bar shaped, but other shapes are possible (e.g., circular, semi-circular, rounded rectangular, square, and the like). It will be appreciated that the wear tile 2 may also be generally referred to as a wear part, wear bar, protective plate, or the like. The wear tile 2 may include an outer layer or portion 10 of wearable material situated on a substrate 11 . The wearable material may be made of several rectangular parts as illustrated or a single bar of material. The wearable material 10 may be white iron, carbide tungsten, steel, ceramic, or other known hard materials. In one example, the outer layer 10 includes a wear surface 22 and an opposing attachment surface 24 (FIG. 4). The wear surface 22 may have a ramped top surface 23.

[0033] Referring to FIG. 4, the substrate 1 1 includes a top surface 51 , a bottom surface 16, an aperture 43, a hole 44, and outer sides 25, 26. The attachment surface 24 is positioned on a top surface 51 of the substrate 11. The wearable material 10 may be cast, brazed, or otherwise secured to the substate 11. The sides 25 are longer than sides 26 (e.g., rectangular), but other configurations are possible (FIG. 3A). The outer layer 10 may be similarly shaped to fit atop the substrate 1 1. In one example, at least one capture assembly 61 extends outward from a first or outer surface 16 of the substrate 1 1 (FIG. 2). In the illustrated example, a pin 15 extends outward of the outer surface 16, but other configurations are possible. For example, the outer surface may include the cartridge 12 or an aperture to situate the cartridge therewithin. The recess 43 is located on at least one of the sides 25, 26 and the bottom side 16 and may be adjacent the capture assembly 61. The recess 43 defines a tool engagement surface 28 (FIG. 3A). The tool engagement surface 28 is vertically inclined such that the higher end of surface 28 is situated on the side 25, but other configurations are possible. The tool engagement surface 28 can be used by a tool 201 as a pry surface to engage the wear tile 2 for removal as will be further discussed below (FIG. 9). In the illustrated example, there are two recesses 43 on each of the sides 25 that define engagement surfaces 28 in line with one another in a transverse direction to axis A (FIG. 2). The inclined surfaces 28 converge centrally to create a pointed end 29 where they meet (FIG. 3A). In the illustrated example, the tool engagement surface 28 is adjacent a pin 15 of a capture assembly 61 , but other configurations are possible. [0034] The hole 44 may have a circular opening, but other configurations are possible (FIG. 4). For example, the hole 44 may be a blind hole. The hole 44 is defined by an inner surface 59. Situated within the hole 44 is a pin 15 of the capture assembly 61. The pin 15 is preferably welded to the substrate 1 1 , but other configurations are possible. In the illustrated example of FIG. 2, the wear tile 2 includes two capture assemblies 61 located near the sides 26 (e.g., closer to one side than a center of the tile ). In another illustrated example, a wear tile may include one capture assembly, e.g., centrally located as shown in FIG. 3A, but other configurations are possible.

[0035] Referring to FIG. 3B, a wear tile 2’ is illustrated. The wear tile 2’ is substantially similar to FIG. 3A, except that the substrate 1 1 ’ has a different configuration than its counterpart substrate 11 . In this illustrated example, there are two apertures 43’, 43” that are located on two opposing sides of a pin 15’. Each aperture 43, 43” opens on the side 25’ as similar to the substrate 11. The recesses 43’, 43” define tool engagement surfaces 28’. The illustrated wear tile 2’ also includes different types of pins 15”. Although two examples are discussed and illustrated herein, many variations in the construction of the wear part, the base, the capture assemblies, and their interconnection are possible.

[0036] The capture assembly 61 preferably includes at least a pin 15 and a cartridge 12, but other configurations are possible (FIG. 2). The pin 15 includes a head 31 and a body 33 (FIG. 8A), where the head 31 is situated atop the body 33. The head 31 includes a top surface 45 that may engage the outer portion 10 of the wear tile 2. The body 33 is sized and shaped to be situated into the cartridge 12. The body 33 may be a cylindrical elongate outer surface with a narrower bottom end 35, though other configurations are possible. The narrow end 35 may include an inwardly ramped surface 34 that converges centrally to align with vertical axis A. The body 33 includes at least one annular groove 49, 49’. The groove 49 is illustrated to be situated above groove 49’. Each groove 49, 49’ circumscribes the body 33. Each groove 49, 49’ may be defined by a ledge 53, an inner surface 55, and a ramped surface 57. [0037] The base or portion of a screen 3 includes a wear tile placement area 21 that supports the wear tile 2 (FIG. 2). The area 21 is preferably situated in-between holes used for screening. The area 21 includes at least one aperture 50 where the at least one cartridge 12 is situated therein. It is envisioned that the area 21 may include the pin 15 in lieu of the aperture 50. The cartridge 12 captures the pin 15 to the base 3, e.g., screen. In the illustrated example, there are two cartridge holding apertures 50 for each wear assembly 5, but other configurations are possible. For example, there may be separate apertures for other types of pins that are not captured by cartridges (see FIG. 3B).

[0038] Referring to FIGS. 5-7, the cartridge 12 is illustrated as including a housing 52, bushings 54, 54’, spacers 56, 56’, and a bushing support 58. The housing 52 encapsulates: the bushings 54, 54’, the spacers 56, 56’, and the bushing support 58. The housing 52 is an elongated cube in shape, but other shapes are possible. The housing 52 is illustrated as three pieces: a bottom portion 62 and two arm portions 64, 64’, but other configurations are possible. For example, the three pieces 62, 64, 64’ may all be one component. The two arm portions 64, 64’ are adjacent the bottom portion 62 at opposing ends. The arm portions 64, 64’ define a channel 72 that is open transverse to the vertical axis A. The channel 72 allows for the easy installation of the other components of the cartridge 12 prior to installation into the aperture 50. The arm portions 64, 64’ may be attached to a surface of the base 3. In the illustrated example, the arm portions 64, 64’ are welded to the outer surface of the base by weld W at a lower portion of the housing 52, but other means of securing are possible (FIG. 7). The arm portions 64, 64’ may include flange sections 68, 68’ that are bent inwardly to create a top surface 70 of the housing 52. The top surface 70 is where the pin 15 is introduced, and generally aligns with the inner surface of the screen 3 (FIG. 8A). The bottom portion 62 is cuboid in structure and includes a central hole 63.

[0039] The bushing support 58 is situated adjacent the bottom portion 62. During assembly of the cartridge 12, the bushing support 58 may be installed through the channel 72. The bushing support 58 may be secured to the housing 52 by weld, adhesives, locking mechanism, or the like. The bushing support 58 is cuboid in structure, but other shapes are possible. In the illustrated example, the corners are tapered to allow for easier insertion. The bushing support 58 includes a central aperture 74 and two side apertures 76, 76’. The central aperture 74 and two side apertures 76, 76’ extend from a top surface 78 to a bottom surface 80 of the bushing support 58. The central aperture 74 defines an inner surface 75 about the vertical axis A. The inner surface 75 may include a ramped portion 77 that converges outwardly (e.g., downwardly). The inner surface 75 may be sized and shaped to complement the narrow end 35 of the pin 15 when the pin 15 is introduced into the circular hole 60 of the cartridge 12. In the illustrated example, the narrow end 35 does not bear on the ramped portion 77 of the bushing support 58. The bushing support 58 is situated atop the bottom portion 62 to align the circular hole 63 of the bottom portion 62 of the housing 52 with the central aperture 74. The two side apertures 76, 76’ extend inwardly and are sized and shaped to complement fitting of the spacers 56, 56’ therein.

[0040] The spacers 56, 56’ are elongated cuboid in shape, but other shapes are possible. For example, the spacers 56, 56’ are illustrated to include two converging sides 55, 55’ that converge inwardly and transverse to the vertical axis A. The spacers 56, 56’ are situated within the respective side apertures 76, 76’ of the bushing support 58 by means of the open channel 72 in the housing 52. The spacers 56, 56’ may be secured through weld or other means to the bushing support 58. The spacers 56, 56’ may extend above the top surface 78 of the bushing support 58. The spacers 56, 56’ are illustrated to not align with top surface 70, but other configurations are possible. The inner sides 57, 57’ of the respective spacers 56, 56’ define a portion of the interior of the cartridge 12. The inner sides 57, 57’ of spacers 56, 56’ may include similar grooves as to the bushings 54, 54’ to aid in the capture of the pin 15.

[0041] The bushings 54, 54’ are illustrated to be two equal sized portions of a whole structure that fit on either side of the housing 52 adjacent the arm portions 64, 64’. The bushings 54, 54’ when set against one another are cuboid in shape, though other configurations are possible. When assembled, the bushings 54,54’ are installed atop the bushing support 58 through the open channel 72. The bushings 54, 54’ are separated from one another by the spacers 56, 56’ on their respective inner ends 79, 79’ (FIG. 6). Each bushing 54, 54’ includes an inwardly inclined ramped surface 90, 90’ and semi-circular grooves 82, 82’ on the inner side 84, 84’ of the respective bushings 54, 54’. When the bushings 54, 54’ are assembled with the spacers 56, 56’, the semi-circular grooves 82, 82’ along with the inner surface 57 of the spacers 56, 56’ create a full circular hole 86 about the vertical axis A. The circular hole 86 may align with the arc portions 66, 66’ (Figs. 8A-8C). The semi-circular grooves 82, 82’ circumscribes the inner side 84, 84’. Each groove 82, 82’ may be defined by a ledge 93, an inner surface 95, and a ramped surface 97 that complement similar surfaces 53, 55, 57 of the grooves of the pin 15 (FIGS. 8A-8C). The semi-annular grooves 82, 82’ are illustrated being situated one above the other. The semi-annular grooves 82, 82’ on each bushing 54, 54’ are sized and shaped to be captured by the body 33 of the pin 15 and vice versa, such that the grooves 49, 49’ of the pin 15 are captured by the inner side 84, 84’ of the bushings 54, 54’ (FIG. 8B).

[0042] The bushings 54, 54’ are preferably elastic. The bushings 54, 54’ may be made from a metal material, such as steel spring or an elastomeric material, such as rubber, polyurethane, polybutadiene, neoprene, or silicone or combination thereof. In another example, the bushings 54, 54’ may be made of an elastomeric material and the spacers 56, 56’ may be made of a metal material.

[0043] The cartridge 12 includes a hole 60 that is defined by: the space between arc portions 66, 66’ of each flange section 68, 68’ at the top surface 70 and the central hole 63 of the bottom portion 62 of the housing 52 about a vertical axis A, inner sides 84, 84’ of the bushing 54, 54’, sides 57, 57’ of the spacers 56, 56’, and central aperture 74 of the bushing support 58. The hole 60 may be cylindrical in nature, but other shapes are possible. The pin 15 may be inserted into the hole 60 of the cartridge 12 until the narrow end 35 of the pin 15 engages the ramped portion 77 of the bushing support 58. Other examples are possible, for example, in the illustrated example, the narrow end 35 does not engage the bushing support 58.

[0044] Referring to FIGS. 8A-8C, the installation of the capture assembly 61 is illustrated. In installation, the pin 15 is installed through the hole 60 of the cartridge 12. The pin 15 is installed through the circular hole 86 of the bushings 54, 54’ and spacers 56, 56’ (FIG. 8A). The insertion of the pin 15 in hole 86 compresses and may separate the bushings 54, 54’ from engagement with the spacers 56, 56’ as the bushings 54, 54’ are compressed and/or elongated in a lateral outward direction from the vertical axis A into a second compressed position (FIG. 8B). In other examples, the bushings and the spacers may not directly engage. The bushings 54, 54’ retract back to their initial position once the ledges 93 of grooves 82, 82’ capture the ledges 53 of the annular grooves 49, 49’ of the pin 15. In one example, the wear tiles 2 may be stepped on by a user to be installed or hammered into place, e.g., a downward force is required. When fully installed, the grooves 82, 82’ on each bushing 54, 54’ are captured by the body 33 of the pin 15. The ledges 53 acts like a stop resisting upward motion and the top ledge 53 engages the ledge 93 of the bushing 54, 54’. The wear tile 2 is in an installed position when the pin 15 is captured within the cartridge and bushings 54, 54’ are generally returned to an initial position (FIG. 8C). The engagement between the bushing 54, 54’ and the pin 15 maintains the bushing 54, 54’ in a non-compressed state or position.

[0045] A removal claw tool 201 is illustrated in FIGS. 9-10. The removal claw tool 201 includes a two elongated bodies 203, 203’ connected to one another, each with a handle portion 205, 205’, a leverage portion 207, and a hook 215, 215’. The two hooks 215, 215’ provide a claw like mechanism for gripping the wear tile 2. The leverage portion 207 includes an actuator 209 that controls the distance between the hooks 215, 215’ (e.g., a spacing of the claw) and a rod 210. In the illustrated example, the handle portions 205, 205’ are attached to the leverage portion 207 and the rotatable rod 210 extends between the two bodies 203, 203’. The direction of rotation affects the distance between the hooks 215, 215’. The hooks 215, 215 function as a claw to engage and grip the tool engagement surface of the wear material 10 of the wear tile 2 (FIG. 9). To remove the tool 201 , the separation of the hooks 215, 215 is controlled by the actuator 209. In the illustrated example, the rod 210 is rotated at a hexagon nut 209 by a wrench R, but other means of control for the separation are possible (e.g., the rod may not be necessary).

[0046] During removal, the wear tile 2 must be moved in the opposite direction of installation (e.g., upward in direction A). The hooks 215, 215’ are maneuvered under the wear tile 2 and grip the tool engage surface 30. The tool 201 is moved with upward pressure in direction A by the handle end 205. The curved surfaces 229, 229’ of the respective hooks 215, 215’ allow for the tool 201 to capture the wear tile 2 for upward motion. The tool 201 may be rocked back and forth as the grooves 82, 82’ of the bushings 54, 54’ and the pin 15 are forcibly separated from one another. The bushings 54, 54’ are forced into a compressed state as the pin 15 is released. This action can be repeated on the opposite end of the wear tile 2 shown in Fig. 3A until the wear tile 2 is released from the base 3.

[0047] This specification describes particular examples and their detailed construction and operation. The examples described are set forth by way of illustration only and not limitation. The described features, structures, characteristics, and methods of operation may be combined in any suitable manner in one or more examples. In view of the disclosure herein, those skilled in the art will recognize that the various examples can be practiced without one or more of the specific details or with other methods, components, materials, or the like. In other instances, well-known structures, materials, or methods of operation are not shown or not described in detail to avoid obscuring more pertinent aspects of the examples. It is intended that the subject matter disclosed in any one portion herein can be combined with the subject matter of one or more other portions herein as long as such combinations are not mutually exclusive or inoperable. In addition, many variations, enhancements, and modifications of the concepts described herein are possible. Those skilled in the art will recognize that many variations can be made to the details of the above-described examples without departing from the underlying principles of the disclosure.

Claims

l/We claim:

1. A wear part comprising: a wear surface having an opposing attachment surface for securing to a base and a capture assembly, the capture assembly includes a pin and a cartridge.

2. The wear part of claim 1 , wherein the cartridge further includes an elastic bushing within the hole in a resting first position.

3. The wear part of claim 2, wherein when the pin is inserted into a hole in the cartridge, the elastic bushing engages the pin and compresses the elastic bushing to a compressed second position and then returns to the first position when the pin is inserted a predetermined amount to capture the pin.

4. The wear part of claim 1 , further comprising a tool engagement surface adjacent the capture assembly, the tool engagement surface defining a recess sized and shaped for engagement with a tool.

5. A wear part comprising: a wear surface and an opposing attachment surface for securing to the first surface of the base, the attachment surface having a pin and a tool engagement surface adjacent the pin, the tool engagement surface defining a recess sized and shaped for engagement with a tool.

6. The wear part of claim 5, wherein the wear part includes a capture assembly, the capture assembly includes a pin and a cartridge.

7. A wear assembly comprising a base having a first surface and a wear part of any one of claims 1-6.

8. The wear part of claim 7, wherein the pin is located on the first surface of the base and the cartridge is located on the opposing attachment surface.

9. A wear assembly comprising a base having a first surface with an aperture and a wear part of any one of claims 1-6.

10. The wear part of claim 9, wherein the pin is located on the opposing attachment surface and the cartridge is located within the aperture of the first surface.

11. The wear assembly of any one of claims 7-10, wherein the base is at least one of earth working equipment, a bucket, vibratory screen, or a rotary screen.

12. The wear part of any one of claims 4-8, wherein the tool engagement surface is ramped vertically.

13. The wear part of any one of claims 4-8, wherein the tool engagement surface is a first tool engagement surface, and the wear part further includes a second tool engagement surface ramped located on an opposite side of the wear part, the second tool engagement surface being ramped vertically such that it converges centrally with the first tool engagement surface.

14. A method of removal of a wear part from a base, the method comprising: providing a wear part having a wear surface and an opposing surface, the opposing surface including a tool engaging surface adjacent a capture assembly, the capture structure including a pin and a cartridge; providing a tool to engage the tool engaging surface and applying a vertical force to create a pull off force between the wear part and a base, the force breaking the connection of the pin from the cartridge that holds the wear part to the base.

15. A tool for removing a wear part comprising:

At least two elongate bodies each with a hook component to create a claw for attachment to two tool engaging surfaces located on an attachment surface of the wear part, the two elongate bodies being connected with a rotatable rod that controls the distance between the hook components from one another.

16. The tool of claim 15, wherein the rod being separately rotatable by a wrench.