# US 2021/0277631 A1 · Wear or protection system for a tool of a machine for moving earth and corresponding pin > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0277631 A1 - Document ID: US20210277631A1 - Status: Published application - Kind: A1 - Application number: 16/313,976 - Filed: 2018-07-13 - Published: 2021-09-09 - Earliest claimed: 2018-07-13 - Assignees: Metalogenia Research & Technologies S.L.; Universidad De Granada - Applicants: Metalogenia Research & Technologies S.L.; Universidad De Granada - Inventors: JORDI MARQUEZ LLINAS; EDUARD ALVAREZ PORTELLA; JORGE TRIGINER BOIXEDA; JOAN TUTO FAJA - Web page: https://patentgrep.com/patent/US20210277631A1 ## CPC - E02F 9/2825: {using adapters} - E02F 9/2841: {resilient} - E02F 9/2883: {Wear elements for buckets or implements in general} - A01B 35/225: {the tools being adapted to allow the chisel point to be easily fitted or removed from the shank} - E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00) - A01B: SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL (making or covering furrows or holes for sowing, planting or manuring A01C5/00; mowers convertible to soil working apparatus or capable of soil working A01D42/04; mowers combined with soil working implements A01D43/12; soil working for engineering purposes E01, E02, E21) ## Abstract The invention relates to a wear or protection system for a tool of an earth moving machine, comprising a wear element (1), a support (3) and a pin (7) with elastic means (13) housed in a housing (5) having a base surface (27) and a compression surface (29). The base surface (27) and a first portion (31) of the compression surface (29) belong to the wear element (1), and the distance between both has a fixed value Df. A second portion (33) of the compression surface (29) belongs to the support (3), and the distance between the base surface (27) and the second portion (33) is variable depending on the wear of the system, having a minimum value Dmin when the system is new and increasing as wear increases. Dmin is less than Df. The pin (7), in the compressed state, has a height H equal to Dmin, and as the system becomes worn, H increases until reaching the value Df. The pin (7) comprises a recess (23) in its upper surface, and in the first portion (31) there is a projection (25), suitable for being housed in the recess (23). ## Claims ### Claim 1 (canceled) ### Claim 2 (canceled) ### Claim 3 (canceled) ### Claim 4 (canceled) ### Claim 5 (canceled) ### Claim 6 (canceled) ### Claim 7 (canceled) ### Claim 8 (canceled) ### Claim 9 (canceled) ### Claim 10 (canceled) ### Claim 11 (canceled) ### Claim 12 (canceled) ### Claim 13 (canceled) ### Claim 14 (canceled) ### Claim 15 (canceled) ### Claim 16 (canceled) ### Claim 17 (canceled) ### Claim 18 (canceled) ### Claim 19 (canceled) ### Claim 20 (canceled) ### Claim 21 (canceled) ### Claim 22 A wear or protection system for a tool of an earth moving machine, comprising a wear element (1), a support (3) supporting said wear element (1), and a pin (7), where when said wear element (1) is mounted on said support (3) there is defined between both a housing (5) in the form of a through hole suitable for housing said pin (7), where said pin (7) has a lower surface (17) and as upper surface (19) and elastic means (13) such that the distance between the lower surface (17) and the upper surface (19) is variable depending on the value of a compressive force applied on said upper surface (19), where said housing (5) has a base surface (27) facing said lower surface (17) when said pin (7) is in said housing (5), and a compression surface (29) facing said upper surface (19) when said pin (7) is in said housing (5), said base surface (27) and a first portion (31) of said compression surface (29) belong to one of said wear element (1) and support (3), and the distance between said base surface (27) and said first portion (31) has a fixed value Df, whereas a second portion (33) of said compression surface (29) belongs to the other one of said wear element (1) and support (3), where the distance between said base surface (27) and said second portion (33) is variable depending on the wear of said wear element (1) and said support (3), having a minimum value Dmin when said wear element (1) and said support (3) are new and increasing as said wear element (1) and said support (3) become worn, where Dmin is less than Df, where said pin (7), in the compressed state, has a height H equal to said minimum value Dmin, and as said wear element (1) and said support (3) become worn, said elastic means (13) increase said height H until reaching the value Df, and where said pin (7) comprises a projection or a recess (23) in one of said lower or upper surfaces, and there is a recess or a projection (25), respectively, suitable for housing said projection or said recess (23) of said pin (7), in said base surface (27) or said first portion (31), respectively, so that as said elastic means (13) gradually increase said height H, the projection or recess (23) of said pin (7) goes further into the recess or projection (25) of said base surface (27) or said first portion (31) and the locking capacity that is obtained as a result of this effect gradually increases. ### Claim 23 (depends on 22) The system according to claim 22, wherein said pin (7) comprises a recess (23) in said upper surface (19) and there is a projection (25), suitable for being housed in said recess (23), in said first portion (31). ### Claim 24 (depends on 22) The system according to claim 22, wherein said base surface (27) and said first portion (31) of said compression surface (29) belong to said wear element (1), and said second portion (33) belongs to said support (3). ### Claim 25 (depends on 22) The system according to claim 22, wherein said pin (7) comprises a shell (9), a retainer (11) and elastic means (13), where: [a] said shell (9) is elongated, defining a longitudinal axis, and has a lower surface which is said lower surface (17) of the pin (7) and a longitudinal hole (35) having a closed front end (37) and an open rear end (39), where said longitudinal hole (35) has an upper opening (15), opposite said lower surface of the shell (9), extending to the rear end (39), where said opening (15) has a width, measured in a transverse direction with respect to said longitudinal axis, less than the maximum width, measured in said transverse direction, of said hole (35), [b] said retainer (11) is housed in said hole (35) and has an upper surface, which is said upper surface (19) of the pin (7), and projects through said opening (15), and a lower surface (47), where said retainer (11) has an upper segment (21) with a width, measured in a transverse direction with respect to said longitudinal axis, less than the width of said opening (15), and a lower segment (45) with a width, measured in a transverse direction with respect to said longitudinal axis, greater than the width of said opening (15), [c] said elastic means (13) are arranged between a lower surface (41) of the hole (35) and said lower surface (47) of the retainer (11). ### Claim 26 (depends on 25) The system according to claim 25, wherein there are first locking means between said hole (35) and said elastic means (13), and there are second locking means between said elastic means (13) and said retainer (11). ### Claim 27 (depends on 25) The system according to claim 25, wherein said elastic means (13) are an elongated part that is elastically compressible in a transverse direction with respect to said longitudinal axis, with an upper surface (59) facing said lower surface (47) of the retainer (11), and a lower surface (55) oriented towards said lower surface (17) of the pin (7). ### Claim 28 (depends on 27) The system according to claim 27, wherein said elastic means (13) comprise a first upper segment (51) made of a solid material and a second elastic lower segment (53). ### Claim 29 (depends on 27) The system according to claim 27, wherein said elastic means (13) comprise a first upper segment (51) made of a polymeric material, preferably polyurethane, and a second lower segment (53) made of an elastic polymeric material with multiple gas-filled, closed internal cavities. ### Claim 30 (depends on 26) The system according to claim 26, wherein said first locking means comprise at least one projection (57) with a height, measured in a transverse direction with respect to said longitudinal axis, increasing from a point close to said front end (37) to a point close to said rear end (39), and a recess (43) suitable for housing said projection (57), where said projection (57) is in said elastic means (13) and said recess (43) is in said hole (35), or vice versa. ### Claim 31 (depends on 30) The system according to claim 30, wherein said projection (57) is on said lower surface (55) of the elastic means (13) and said recess (43) is on the lower surface (41) of said hole (35). ### Claim 32 (depends on 26) The system according to claim 26, wherein said second locking means comprise at least one projection (49) having a height, measured in a transverse direction with respect to said longitudinal axis, increasing from a point close to said front end (37) to a point close to said rear end (39), and a recess (61) suitable for housing said projection (49), where said projection (49) is in said retainer (11) and said recess (61) is in said elastic means (13), or vice versa. ### Claim 33 (depends on 32) The system according to claim 32, wherein said projection (49) is on the lower surface (47) of said retainer (11) and said recess (61) is in the upper surface (59) of said elastic means (13). ### Claim 34 A pin (7) for a wear or protection system for a tool of an earth moving machine, comprising a wear element (1), a support (3) supporting said wear element (1), and said pin (7), where when said wear element (1) is mounted on said support (3) there is defined between both a housing (5) in the form of a through hole suitable for housing said pin (7), where said pin (7) has a lower surface (17) and an upper surface (19) and elastic means (13) such that the distance between the lower surface (17) and the upper surface (19) is variable depending on the value of a compressive force applied on said upper surface (19), a shell (9), a retainer (11) and elastic means (13), where: [a] said shell (9) is elongated, defining a longitudinal axis, and has a lower surface which is said lower surface (17) of the pin (7) and a longitudinal bole (35), parallel to said longitudinal axis, having a closed front end (37) and an open rear end (39), where said longitudinal hole (35) has an upper opening (15), opposite said lower surface of the shell (9), extending to the rear end (39), where said opening (15) has a width, measured in a transverse direction with respect to said longitudinal axis, less than the maximum width, measured in said transverse direction, of said hole (35), [b] said retainer (11) is housed in said hole (35) and has an upper surface, which is said upper surface (19) of the pin (7), and projects through said opening (15), and a lower surface (47), where said retainer (11) has an upper segment (21) with a width, measured in a transverse direction with respect to said longitudinal axis, less than the width of said opening (15) and a lower segment (45) with a width, measured in a transverse direction with respect to said longitudinal axis, greater than the width of said opening (15), [c] said elastic means (13) are arranged between a lower surface (41) of the hole (35) and said lower surface (47) of the retainer (11). ### Claim 35 (depends on 34) The pin (7) according to claim 34, wherein there are first locking means between said hole (35) and said elastic means (13), and where there are second locking means between said elastic means (13) and said retainer (11). ### Claim 36 (depends on 34) The pin (7) according to claim 34, wherein said elastic means (13) are an elongated part that is elastically compressible in a transverse direction with respect to said longitudinal axis, with an upper surface (59) facing said lower surface (47) of the retainer (11), and a lower surface (55) oriented towards said lower surface (17) of the pin (7). ### Claim 37 (depends on 36) The pin (7) according to claim 36, wherein said elastic means (13) comprise a first upper segment (51) made of a solid material and a second elastic lower segment (53). ### Claim 38 (depends on 36) The pin (7) according to claim 36, wherein said elastic means (13) comprise a first upper segment (51) made of a polymeric material, preferably polyurethane, and a second lower segment (53) made of an elastic polymeric material with multiple gas-filled, closed internal cavities. ### Claim 39 (depends on 35) The pin (7) according to claim 35, wherein said first locking means comprise at least one projection (57) with a height, measured in a transverse direction with respect to said longitudinal axis, increasing from a point close to said front end (37) to a point close to said rear end (39), and a recess (43) suitable for housing said projection (57), where said projection (57) is in said elastic means (13) and said recess (43) is in said hole (35), or vice versa. ### Claim 40 (depends on 39) The pin (7) according to claim 39, wherein said projection (57) is in said lower surface (55) of the elastic means (13) and said recess (43) is in the lower surface (41) of said hole (35). ### Claim 41 (depends on 35) The pin (7) according to claim 35, wherein said second locking means comprise at least one projection (49) having a height, measured in a transverse direction with respect to said longitudinal axis, increasing from a point close to said front end (37) to a point close to said rear end (39), and a recess (61) suitable for housing said projection (49), where said projection (49) is in said retainer (11) and said recess (61) is in said elastic means (13), or vice versa. ### Claim 42 (depends on 41) The pin (7) according to claim 41, wherein said projection (49) is on the lower surface (47) of said retainer (11) and said recess (61) is in the upper surface (59) of said elastic means (13).