# US 2014/0360062 A1 · Mechanical system comprising a wear part and a support, and a bucket comprising at least one such mechanical system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0360062 A1 - Document ID: US20140360062A1 - Status: Published application - Kind: A1 - Application number: 14/362,722 - Filed: 2012-12-07 - Published: 2014-12-11 - Earliest claimed: 2011-12-08 - Assignees: Safe Metal - Inventors: Fabrice Marchand - Web page: https://patentgrep.com/patent/US20140360062A1 ## CPC - E02F 9/2858: {characterised by shape} - E02F 9/2825: {using adapters} - E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00) ## Abstract A mechanical system includes a wear part and a support, belonging to the equipment of a construction machine. The support includes a base, a nose which extends from the base along a main axis, and to each side of the base, a housing for receiving a lug of the wear part. The nose includes a first area located near the proximal end of the nose and which includes at least six planar faces arranged in opposite pairs delimiting sections of a first type, and a second area located near the distal end of the nose and which includes at least six planar faces arranged in opposite pairs delimiting sections of a second type, each planar face of the second area being less inclined, relative to the main axis, than the planar face of the first area, which is located in the extension of the planar face in the proximal direction. ## Claims ### Claim at position 1 1-10. (canceled) ### Claim 11 Mechanical system (1) comprising a wear part (10) and a support (20) that belong to a heavy-construction machine bucket (G), the support (20) comprising: a base (22), a nose (30) that extends from the base (22) along a principal axis (X30), between a proximal end (31) close to the base (22) and a distal end (33) opposite to the base (22), the nose having a set of cross-sections (50, 70, 90), in planes perpendicular to the principal axis (X30), that change in a proximal direction (D31) while delimiting increasing or constant areas, in particular not delimiting any decreasing area, apart from the presence of a housing for receiving a connection device in the nose (30), and on each side of the base (22), a housing (24) receiving a lug (14) belonging to the wear part (10), the housing (24) being provided in the base (22) in line with the nose (30), with an open side in a distal direction (D33) as well as three closed sides, the mechanical system (1) being characterised in that the nose (30) comprises: a first zone (40) that is situated in the vicinity of the proximal end (31) of the nose (30) and comprises at least six flat faces (41-48) opposite in pairs (41, 45; 42, 46; 43, 47; 44, 48) delimiting cross-sections of a first type (50), and a second zone (80) that is situated in the vicinity of the distal end (33) of the nose (30) and comprises at least six flat faces (81-88) opposite in pairs (81, 85; 82, 86; 83, 87; 84, 88) delimiting cross-sections of a second type (90), each flat face (81-88) of the second zone (80) being less inclined, with respect to the principal axis (X30), than the flat face (41-48) of the first zone (40) that is situated in line with it along the proximal direction (D31). ### Claim 12 (depends on 11) Mechanical system (1) according to claim 11, wherein the first zone (40) of the nose (30) comprises at least eight flat faces (41-48) opposite in pairs (41, 45; 42, 46; 43, 47; 44, 48). ### Claim 13 (depends on 12) Mechanical system (1) according to claim 12, wherein at least some of the opposite flat faces (41-48) of the first zone (40) are parallel to each other. ### Claim 14 (depends on 11) Mechanical system (1) according to claim 11, wherein the second zone (80) of the nose (30) comprises at least six flat faces (81-88) parallel in pairs (81, 85; 82, 86; 83, 87; 84, 88). ### Claim 15 (depends on 14) Mechanical system (1) according to claim 14, wherein the second zone (80) of the nose (30) comprises at least eight flat faces (81-88) parallel in pairs (81, 85; 82, 86; 83, 87; 84, 88). ### Claim 16 (depends on 11) Mechanical system (1) according to claim 11, wherein the nose (30) comprises a third intermediate zone (60) between the first zone (40) and the second zone (80) of the nose (30) along the principal axis (X30), the third zone (60) comprising at least six faces (61-68) opposite in pairs (61, 65; 62, 66; 63, 67; 64, 68) delimiting cross-sections of a third type (70) in planes perpendicular to the principal axis (X30), the areas delimited by the cross-sections of the third type (70) having, in the proximal direction (D31), a rate of increase greater than the rate of increase of the areas delimited by the cross-sections of the first type (50) and the rate of increase of the areas delimited by the cross-sections of the second type (90). ### Claim 17 (depends on 16) Mechanical system (1) according to claim 16, wherein the third zone (60) comprises at least four flat faces (61, 63, 65, 67) and four left-hand faces (62, 64, 66, 68) opposite in pairs (61, 65; 62, 66; 63, 67; 64, 68). ### Claim 18 (depends on 16) Mechanical system (1) according to claim 16, wherein the flat faces (41-48, 61-68, 81-88) of the first zone (40), of the second zone (80) and of the third zone (60) that are situated firstly in the same plane (PV; PI, PH) comprising the principal axis (X30) and secondly on the same side of the principal axis (X30), are inclined with respect to each other at obtuse angles (α1, α2, α3, β1, β2, β3) of between 160 and 200 degrees. ### Claim 19 (depends on 16) Mechanical system (1) according to claim 16, wherein the flat faces (61-68) of the third zone (60) comprise: firstly, primary faces (61, 65) having the same inclination with respect to the principal axis (X30) as the flat faces (41, 45) of the first zone (40) that are in line with them in the proximal direction (D31), these primary faces (61, 65) being able to withstand mechanical stresses exerted on the nose (30) when a digging force (Fc) is applied to the wear part (10), and secondly, secondary faces (62, 63, 64, 66, 67, 68) overall more inclined with respect to the principal axis (X30) than the flat faces (42, 43, 44, 46, 47, 48) of the first zone (40) that are in line with them in the proximal direction (D31). ### Claim 20 (depends on 16) Mechanical system (1) according to claim 16, wherein the third zone (60) of the nose (30) comprises: two flat faces (61, 65) perpendicular to a vertical plane (PV), and at least four faces (62, 64, 66, 68) oriented otherwise than at a right angle both with respect to the vertical plane (PV) and with respect to the horizontal plane (PH). ### Claim 21 (depends on 20) Mechanical system (1) according to claim 20, wherein the third zone (60) of the nose (30) comprises two flat faces (63, 67) perpendicular to a horizontal plane (PH). ### Claim 22 (depends on 16) Mechanical system (1) according to claim 16, wherein when a force (Fc) is applied to the wear part (10), the support (20) and the wear part (10) comprise at least one contact interface from: a first contact interface situated between each lug (14) and the housing (24) receiving this lug (14), a second contact interface situated between the wear part (10) and the flat faces (81, 85) of the second zone (80) that extend substantially perpendicular to the force (Fc), a third contact interface situated between the wear part (10) and the flat faces (41, 45) of the first zone (40) that extend in line with the second contact interface in the proximal direction (D31), a fourth contact interface situated between the wear part (10) and the flat faces (61, 65) of the third zone (60) that extend in line with the second contact interface in the proximal direction (D31), and a fifth contact interface situated between the wear part (10) and a flat face (34) that is perpendicular to the principal axis (X30) and arranged at the distal end (33) of the nose (30), the number of simultaneous contact interfaces in service depending firstly on the direction of the force (Fc) and secondly on the wear on the wear part (10) and/or support (20). ### Claim 23 (depends on 11) Mechanical system (1) according to claim 11, wherein when a force (Fc) is applied to the wear part (10), the support (20) and the wear part (10) comprise at least one contact interface from: a first contact interface situated between each lug (14) and the housing (24) receiving this lug (14), a second contact interface situated between the wear part (10) and the flat faces (81, 85) of the second zone (80) that extend substantially perpendicular to the force (Fc), a third contact interface situated between the wear part (10) and the flat faces (41, 45) of the first zone (40) that extend in line with the second contact interface in the proximal direction (D31), and a contact interface situated between the wear part (10) and a flat face (34) that is perpendicular to the principal axis (X30) and arranged at the distal end (33) of the nose (30), the number of simultaneous contact interfaces in service depending firstly on the direction of the force (Fc) and secondly on the wear on the wear part (10) and/or support (20). ### Claim 24 (depends on 11) Mechanical system (1) according to claim 11, wherein the nose (30) has at least one symmetry plane (PV; PH) including the principal axis (X30), in particular a vertical plane (PV) and/or a horizontal plane (PH), the principal axis (X30) preferably being a symmetry axis of the nose (30). ### Claim 25 (depends on 11) A heavy-construction machine bucket (G), comprising at least one mechanical system (1) according to claim 11.