# US 2017/0284233 A1 · Roller-Type Rocker Arm > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0284233 A1 - Document ID: US20170284233A1 - Status: Published application - Kind: A1 - Application number: 15/508,290 - Filed: 2015-04-14 - Published: 2017-10-05 - Earliest claimed: 2014-09-02 - Assignees: Riken - Inventors: Mitsuhiro Maehara - Web page: https://patentgrep.com/patent/US20170284233A1 ## CPC - F01L 1/181: {Centre pivot rocking arms} - F01L 1/18: Rocking arms or levers - F01L 1/185: {Overhead end-pivot rocking arms} - F01L 2301/00: Using particular materials - F01L 2305/00: Valve arrangements comprising rollers - F01L: CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES ## Abstract A roller-type rocker arm had a function for transmitting a rotational motion of a cam to an intake and exhaust valve. The roller-type rocker arm includes a roller shaft, an inner ring roller slidably attached to an outer circumference surface of the roller shaft, and an outer ring roller slidably attached to an outer circumference surface of the inner ring roller. The inner ring roller is made of a resin material. ## Claims ### Claim 1 A roller-type rocker arm having a function for transmitting a rotational motion of a cam to an intake and exhaust valve, the roller-type rocker arm comprising: a roller shaft; an inner ring roller made of a resin material, the inner ring roller slidably attached to an outer circumference surface of the roller shaft; and an outer ring roller slidably attached to an outer circumference surface of the inner ring roller. ### Claim 2 (depends on 1) The roller-type rocker arm according to claim 1, wherein the resin material comprises a material selected from the consisting of polyetheretherketon, polyphenylenesulfide, polytetrafluoroethene, polyethersulphone, polybensimidazole, polyimide or poliamide. ### Claim 3 (depends on 2) The roller-type rocker arm according to claim 2, wherein the resin material further includes a material selected from the group consisting of a carbon fiber, CNT (carbon nano tube), CNC (carbon nano coil), and reinforced fiber with a glass fiber. ### Claim 4 (depends on 2) The roller-type rocker arm according to claim 2, wherein the resin material includes reinforced fibers that are arranged approximately in parallel to a sliding direction of the inner ring roller. ### Claim 5 (depends on 1) The roller-type rocker arm according to claim 1, wherein the outer circumference surface slidably attached to an outer circumference surface of the roller shaft is formed with an amorphous hard carbon coat. ### Claim 6 (depends on 1) The roller-type rocker arm according to claim 1, wherein an inner surface of the outer ring roller is formed with an amorphous hard carbon coat. ### Claim 7 (depends on 4) The roller-type rocker arm according to claim 4, wherein the reinforced fibers are formed from a material selected from the group consisting of a carbon fiber, CNT (carbon nano tube), CNC (carbon nano coil), and reinforced fiber with a glass fiber. ### Claim 8 A roller-type rocker arm having a function for transmitting a rotational motion of a cam to an intake and exhaust valve, the roller-type rocker arm comprising: a roller shaft having an outer circumference surface formed with an amorphous hard carbon coat; an inner ring roller made of a resin material, the inner ring roller slidably attached to the outer circumference surface of the roller shaft, wherein the resin material comprises a material selected from the consisting of polyetheretherketon, polyphenylenesulfide, polytetrafluoroethene, polyethersulphone, polybensimidazole, polyimide and poliamide; and an outer ring roller having an inner circumference surface that is slidably attached to an outer circumference surface of the inner ring roller, the inner surface of the outer ring roller being formed with an amorphous hard carbon coat. ### Claim 9 (depends on 8) The roller-type rocker arm according to claim 8, wherein the resin material further includes a material selected from the group consisting of a carbon fiber, CNT (carbon nano tube), CNC (carbon nano coil), or reinforced fiber with a glass fiber. ### Claim 10 (depends on 8) The roller-type rocker arm according to claim 8, wherein the resin material includes reinforced fibers that are arranged approximately in parallel to a sliding direction of the inner ring roller. ### Claim 11 A roller-type rocker arm having a function for transmitting a rotational motion of a cam to an intake and exhaust valve, the roller-type rocker arm comprising: a roller shaft having an outer circumference surface formed with an amorphous hard carbon coat; an inner ring roller made of a resin material, the inner ring roller slidably attached to the outer circumference surface of the roller shaft, wherein the resin material includes reinforced fibers that are arranged approximately in parallel to a sliding direction of the inner ring roller; and an outer ring roller having an inner circumference surface that is slidably attached to an outer circumference surface of the inner ring roller, the inner surface of the outer ring roller being formed with an amorphous hard carbon coat. ### Claim 12 (depends on 11) The roller-type rocker arm according to claim 11, wherein the resin material comprises a material selected from the consisting of polyetheretherketon, polyphenylenesulfide, polytetrafluoroethene, polyethersulphone, polybensimidazole, polyimide and poliamide. ### Claim 13 (depends on 11) The roller-type rocker arm according to claim 11, wherein the reinforced fibers comprise a carbon fiber. ### Claim 14 (depends on 11) The roller-type rocker arm according to claim 11, wherein the reinforced fibers comprise a carbon nano tube. ### Claim 15 (depends on 11) The roller-type rocker arm according to claim 11, wherein the reinforced fibers comprise a carbon nano coil. ### Claim 16 (depends on 11) The roller-type rocker arm according to claim 11, wherein the reinforced fibers comprise a reinforced fiber with a glass fiber.