# US 10,865,868 B2 · Non-metal sprocket > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,865,868 B2 - Document ID: US10865868B2 - Status: Granted - Kind: B2 - Application number: 15/995,937 - Filed: 2018-06-01 - Published: 2018-09-27 - Granted: 2020-12-15 - Earliest claimed: 2016-06-09 - Assignees: ContiTech Antriebssysteme GmbH - Applicants: ContiTech Antriebssysteme GmbH - Inventors: Frank Feuerborn; Matthew A. Linn - Web page: https://patentgrep.com/patent/US10865868B2 ## CPC - F16H 55/06: Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties - F16H 55/171: {Toothed belt pulleys} - F16H 55/48: manufactured exclusively or in part of non-metallic material, e.g. plastics (F16H55/38, F16H55/42, F16H55/46 take precedence) - F16H 55/49: Features essential to V-belts pulleys - F16H: GEARING ## Abstract A high torque sprocket includes a body defining an outer periphery and a hub section defining an inner surface for engaging a bushing. A continuous toothed structure is disposed on the outer periphery of the body, and a textile reinforcement embedded in the body adjacent the inner surface of the hub section. The body is formed of a castable polymer material. In some cases, one or two optional flanges are disposed on side(s) of the body immediately adjacent the continuous toothed structure, in some aspects, a textile reinforcement may be embedded in a surface of the flange(s) immediately adjacent the continuous toothed structure. In some aspects, ultra-high molecular weight polyethylene (UHMWPE) is incorporated into the castable polymer material mixture in an amount suitable to provide increased durability to the sprocket. ## Claims ### Claim 1 A high torque sprocket comprising a body defining an outer periphery and a recessed hub section defining an inner surface for engaging a bushing comprising a smooth circular outer surface and at least one threaded port for securing with the high torque sprocket, a continuous toothed structure disposed on the outer periphery of the body, and a textile reinforcement embedded in the body adjacent the inner surface of the hub section, wherein the body is formed of a castable polyurethane material, and wherein the castable polyurethane material comprises ultra-high molecular weight powder in an amount of from 1% to 10% by weight of the castable polyurethane material; wherein the castable polyurethane material consists of a liquid which fills a mold and hardens to form the body; and, wherein the hub section inner surface is adapted to engage a QD bushing; provided the castable polyurethane material is devoid of fibers. ### Claim 2 (depends on 1) The high torque sprocket of claim 1 further comprising a flange disposed on a side of the body immediately adjacent the continuous toothed structure. ### Claim 3 (depends on 2) The high torque sprocket of claim 2 further comprising a textile reinforcement embedded in a surface of the flange immediately adjacent the continuous toothed structure. ### Claim 4 (depends on 1) The high torque sprocket of claim 1 further comprising a textile reinforcement embedded in the continuous toothed structure outer surface. ### Claim 5 (depends on 1) The high torque sprocket of claim 1, wherein the castable polyurethane material comprises the ultra-high molecular weight powder in an amount of from 3% to 7% by weight of the castable polyurethane material. ### Claim 6 (depends on 1) The high torque sprocket of claim 1, wherein the ultra-high molecular weight powder has an average particle size of from 40 microns to 80 microns. ### Claim 7 (depends on 1) The high torque sprocket of claim 1, wherein the castable polyurethane material has a cured hardness of from 60 Shore D to 100 Shore D. ### Claim 8 (depends on 1) The high torque sprocket of claim 1, wherein the body is devoid of any metal structure. ### Claim 9 (depends on 8) The high torque sprocket of claim 8, wherein the body defines ports comprising threaded metal inserts disposed therein. ### Claim 10 A high torque sprocket comprising a body defining an outer periphery and a recessed hub section defining an inner surface for engaging a bushing comprising a smooth circular outer surface and at least one threaded port for securing with the high torque sprocket, and a belt engaging structure disposed on the outer periphery of the body, wherein the hub section inner surface is a tapered shape, wherein the body is formed of a castable polyurethane material and devoid of any metal structure, and wherein the castable polyurethane material comprises ultra-high molecular weight powder in an amount of from 1% to 10% by weight of the castable polyurethane material; wherein the castable polyurethane material consists of a liquid which fills a mold and hardens to form the body; and, wherein the hub section inner surface is adapted to engage a QD bushing; provided the castable polyurethane material is devoid of fibers. ### Claim 11 (depends on 10) The high torque sprocket of claim 10, wherein a textile reinforcement is embedded in the body adjacent the hub section inner surface. ### Claim 12 (depends on 10) The high torque sprocket of claim 10 further comprising a flange disposed on a side of the body immediately adjacent the belt engaging structure. ### Claim 13 (depends on 12) The high torque sprocket of claim 12 further comprising a textile reinforcement embedded in a surface of the flange immediately adjacent the belt engaging structure. ### Claim 14 (depends on 10) The high torque sprocket of claim 10 further comprising a textile reinforcement embedded in the belt engaging structure outer surface. ### Claim 15 (depends on 10) The high torque sprocket of claim 10, wherein the castable polyurethane material comprises the ultra-high molecular weight powder in an amount of from 3% to 7% by weight of the castable polyurethane material. ### Claim 16 (depends on 10) The high torque sprocket of claim 10, wherein the ultra-high molecular weight powder has an average particle size of from 40 microns to 80 microns. ### Claim 17 (depends on 10) The high torque sprocket of claim 10, wherein the castable polyurethane material has a cured hardness of from 60 Shore D to 100 Shore D. ### Claim 18 A high torque sprocket comprising a body defining an outer periphery and a recessed hub section for engaging a bushing comprising a smooth circular outer surface and at least one threaded port for securing with the high torque sprocket, a continuous toothed structure disposed on the outer periphery of the body, and a textile reinforcement embedded in the hub section inner surface, wherein the hub section inner surface is a tapered shape, wherein an outer portion of the body is formed of a castable polyurethane material and an inner portion of the body is formed of steel, wherein the castable polyurethane material comprises ultra-high molecular weight powder in an amount of from 1% to 10% by weight of the castable polyurethane material, wherein the castable polyurethane material consists of a liquid which fills a mold and hardens to form the body, and wherein the hub section inner surface is adapted to engage a QD bushing, provided the castable polyurethane material is devoid of fibers.