# US 2008/0185162 A1 · Motor Grader > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2008/0185162 A1 - Document ID: US20080185162A1 - Status: Published application - Kind: A1 - Application number: 11/997,756 - Filed: 2006-07-20 - Published: 2008-08-07 - Earliest claimed: 2005-08-03 - Assignees: Komatsu Ltd. - Inventors: Kenichi Maeda - Web page: https://patentgrep.com/patent/US20080185162A1 ## CPC - E02F 3/844: {for positioning the blade, e.g. hydraulically} - E02F 3/7668: {with the scraper blade being pivotable about a vertical axis} - E02F 3/7672: {with the scraper blade being pivotable about a horizontal axis disposed parallel to the blade} - E02F 3/7677: {with the scraper blade being pivotable about a horizontal axis disposed perpendicular to the blade} - E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00) ## Abstract One ends of respective lift cylinders 11a and 11b are connected to a lifter bracket 7 respectively through first support means 20a and 20b, and other ends of the lift cylinders 11a and 11b are connected to a draw bar 3 respectively through second support means 21a and 21b. The one ends and the other ends of the lift cylinders 11a and 11b are offset from each other in a front-rear direction of the motor grader as viewed from above the motor grader, thereby disposing the pair of lift cylinders 11a and 11b inclined as viewed from a side of the motor grader. With this structure, it is possible to obtain the motor grader in which a height position of each end of the lift cylinders 11a and 11b can be substantially equal to a height position of the lifter bracket 7 as viewed from the side of the motor grader, and a visibility hindrance by the pair of lift cylinders can extremely be lowered. ## Claims ### Claim at position 1 1-7. (canceled) ### Claim 8 A motor grader comprising: a front frame on which a lifter bracket is disposed; a draw bar which has one end turnably connected to the front frame and rotatably supports a blade at its lower surface; and a pair of left and right lift cylinders on a side of the other end of the draw bar, the lift cylinders lifting up and down the draw bar, wherein: one ends of the respective lift cylinders are connected to the lifter bracket through first support means having a freedom degree of two shafts or more, and the other ends of the respective lift cylinders are connected to the draw bar through second support means having a freedom degree of two shafts or more. ### Claim 9 A motor grader comprising: a front frame on which a lifter bracket is disposed; a draw bar which has one end turnably connected to the front frame and rotatably supports a blade at its lower surface; and a pair of left and right lift cylinders on a side of the other end of the draw bar, the lift cylinders lifting up and down the draw bar, wherein: one ends of the respective lift cylinders are connected to the lifter bracket through first support means having a freedom degree of two shafts or more, and the other ends of the respective lift cylinders are connected to the draw bar through second support means having a freedom degree of two shafts or more, and the one ends and the other ends of the respective lift cylinders are offset in a front-rear direction of the motor grader as viewed from above the motor grader. ### Claim 10 (depends on 9) The motor grader according to claim 9, wherein the one ends of the respective lift cylinders are offset on a forward side of the motor grader with respect to the other ends of the respective lift cylinder as viewed from above the motor grader. ### Claim 11 (depends on 2) The motor grader according to claim 2, wherein the one ends of the respective lift cylinders are offset on a rearward side of the motor grader with respect to the other ends of the respective lift cylinder as viewed from above the motor grader. ### Claim 12 (depends on 8) The motor grader according to claim 8, wherein: a pair of support brackets which supports the respective lift cylinders through the first support means are disposed on the lifter bracket in a right-and-left direction of the motor grader, and in a region of surfaces of projections of the respective lift cylinders and the pair of support brackets, wherein the surfaces of the projections of the respective lift cylinders and the surfaces of the projections of the pair of support brackets are superposed on each other at least partially in a front perspective view of the motor grader as viewed forward from a driver's seat, an area of the surfaces of the projections where the lift cylinders and the support brackets are superposed on each other is larger than an area of the surfaces of the projections where they are not superposed on each other. ### Claim 13 (depends on 2) The motor grader according to claim 2, wherein: a pair of support brackets which supports the respective lift cylinders through the first support means are disposed on the lifter bracket in a right-and-left direction of the motor grader, and in a region of surfaces of projections of the respective lift cylinders and the pair of support brackets, wherein the surfaces of the projections of the respective lift cylinders and the surfaces of the projections of the pair of support brackets are superposed on each other at least partially in a front perspective view of the motor grader as viewed forward from a driver's seat, an area of the surfaces of the projections where the lift cylinders and the support brackets are superposed on each other is larger than an area of the surfaces of the projections where they are not superposed on each other. ### Claim 14 (depends on 10) The motor grader according to claim 10, wherein: a pair of support brackets which supports the respective lift cylinders through the first support means are disposed on the lifter bracket in a right-and-left direction of the motor grader, and in a region of surfaces of projections of the respective lift cylinders and the pair of support brackets, wherein the surfaces of the projections of the respective lift cylinders and the surfaces of the projections of the pair of support brackets are superposed on each other at least partially in a front perspective view of the motor grader as viewed forward from a driver's seat, an area of the surfaces of the projections where the lift cylinders and the support brackets are superposed on each other is larger than an area of the surfaces of the projections where they are not superposed on each other. ### Claim 15 (depends on 11) The motor grader according to claim 11, wherein: a pair of support brackets which supports the respective lift cylinders through the first support means are disposed on the lifter bracket in a right-and-left direction of the motor grader, and in a region of surfaces of projections of the respective lift cylinders and the pair of support brackets, wherein the surfaces of the projections of the respective lift cylinders and the surfaces of the projections of the pair of support brackets are superposed on each other at least partially in a front perspective view of the motor grader as viewed forward from a driver's seat an area of the surfaces of the projections where the lift cylinders and the support brackets are superposed on each other is larger than an area of the surfaces of the projections where they are not superposed on each other. ### Claim 16 (depends on 8) The motor grader according to claim 8, wherein each of the lift cylinders is a multistage cylinder of a telescopic type. ### Claim 17 (depends on 9) The motor grader according to claim 9, wherein each of the lift cylinders is a multistage cylinder of a telescopic type. ### Claim 18 (depends on 10) The motor grader according to claim 10, wherein each of the lift cylinders is a multistage cylinder of a telescopic type. ### Claim 19 (depends on 11) The motor grader according to claim 11, wherein each of the lift cylinders is a multistage cylinder of a telescopic type. ### Claim 20 (depends on 8) The motor grader according to claim 8, wherein each of the first support means and the second support means is support means having a ball joint mechanism, support means having a trunnion mechanism or support means having a universal joint mechanism. ### Claim 21 (depends on 9) The motor grader according to claim 9, wherein each of the first support means and the second support means is support means having a ball joint mechanism, support means having a trunnion mechanism or support means having a universal joint mechanism. ### Claim 22 (depends on 10) The motor grader according to claim 10, wherein each of the first support means and the second support means is support means having a ball joint mechanism, support means having a trunnion mechanism or support means having a universal joint mechanism. ### Claim 23 (depends on 11) The motor grader according to claim 11, wherein each of the first support means and the second support means is support means having a ball joint mechanism, support means having a trunnion mechanism or support means having a universal joint mechanism.