# US 9,752,669 B2 · Cam follower roller device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,752,669 B2 - Document ID: US9752669B2 - Status: Granted - Kind: B2 - Application number: 14/572,892 - Filed: 2014-12-17 - Published: 2015-06-25 - Granted: 2017-09-05 - Earliest claimed: 2013-12-23 - Assignees: Aktiebolaget Skf - Applicants: Benoît Hauvespre; Gwenael Hingouet - Inventors: Benoît Hauvespre; Gwenael Hingouet - Web page: https://patentgrep.com/patent/US9752669B2 ## CPC - F16H 53/06: Cam-followers (F16H53/08 takes precedence) - F01L 1/14: Tappets {(hydraulic tappets for automatically adjusting or compensating clearance F01L1/24)}; Push rods - F02M 59/102: {Mechanical drive, e.g. tappets or cams (F02M45/063 takes precedence)} - F02M 59/445: {Selection of particular materials} - F01L 2305/00: Valve arrangements comprising rollers - F01L 2305/02: Mounting of rollers - F02M 2200/02: Fuel-injection apparatus having means for reducing wear - F02M 2200/9038: Coatings - Y10T 74/2107: Follower - F16H: GEARING - F01L: CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The cam follower roller device comprises a body, a shaft mounted on the body, and a roller mounted on the said shaft in a rotationally movable manner and comprising two end faces. Each of the said faces is arranged at least in part axially facing an inner wall of the body. At least one of the end faces of the roller and/or at least one of the said inner walls of the body comprise an antifriction and wear-resistant coating. ## Claims ### Claim 1 A cam follower roller device comprising: a body; a shaft mounted on the body; and a roller mounted on the shaft in a rotationally movable manner and such that the roller is able to freely translate in an axial direction with respect to the shaft, the roller comprising two end faces joined by a radial outer surface extending therebetween, each of the end faces being arranged at least in part axially facing an inner wall of the body, the shaft radially positions and radially fixes the roller with respect to the body, wherein each end face of the roller comprises at least one of an antifriction coating and a wear-resistant coating, the at least one of the antifriction coating and the wear-resistant coating covering the entirety of each end face such that the at least one of the antifriction coating and the wear-resistant coating extends from a cylindrical bore of the roller to the radial outer surface, wherein the inner wall of the body comprises the at least one of the antifriction coating and the wear-resistant coating, the at least one of the antifriction coating and the wear-resistant coating covering the entirety of the inner wall of the body, wherein the at least one of the antifriction coating and the wear-resistant coating of the roller and the at least one of the antifriction coating and the wear-resistant coating of the body are different from one another, the shaft axially extends through the roller and at least partially into a cutout formed in the body and extending from the inner wall such that the body secures the shaft relative to the body in at least one direction, and wherein the radial outer surface of the roller does not contact any portion of the body. ### Claim 2 (depends on 1) The cam follower roller device according to claim 1, in which each of the two end faces of the roller comprises the antifriction coating and the inner wall of the body comprises the wear-resistant coating, or vice versa. ### Claim 3 (depends on 2) The cam follower roller device according to claim 2, in which the antifriction coating of each end face of the roller comprises tungsten disulphide and the wear-resistant coating of the inner wall of the body comprises diamond-like amorphous carbon. ### Claim 4 (depends on 1) The cam follower roller device according to claim 1, in which each end face of the roller comprises the wear-resistant coating and the inner wall of the body comprises the antifriction coating. ### Claim 5 (depends on 4) The cam follower roller device according to claim 4, in which the wear-resistant coating of each end face of the roller comprises diamond-like amorphous carbon and the antifriction coating of the inner wall of the body comprises tungsten disulphide. ### Claim 6 (depends on 1) The cam follower roller device according to claim 1, further comprising a plain bearing interposed radially between the shaft and the roller. ### Claim 7 (depends on 1) The cam follower roller device according to claim 1, wherein an axial bottom wall of the body comprises one of the antifriction coating and the wear-resistant coating. ### Claim 8 (depends on 7) The cam follower roller device according to claim 7, wherein the one of the antifriction coating and the wear-resistant coating comprise one of diamond-like amorphous carbon, tungsten disulphide, black oxide, phosphate, chromium nitride, and titanium nitride. ### Claim 9 (depends on 1) The cam follower roller device according to claim 1, wherein each end face of the roller has a stepped-shape. ### Claim 10 A cam follower roller device comprising: a body; a shaft mounted on the body; and a roller mounted on the said shaft in a rotationally movable manner and comprising two end faces, each of the said faces being arranged at least in part axially facing an inner wall of the body, wherein each of the two end faces of the roller and each of the inner walls of the body comprise at least one of an antifriction coating and a wear-resistant coating, wherein the at least one of the antifriction coating and the wear-resistant coating of the roller and the at least one of the antifriction coating and the wear-resistant coating of the body are different from one another, in which each end face of the roller comprises the antifriction coating and each inner wall of the body comprises the wear-resistant coating, or vice versa, and in which the coating of each end face of the roller comprises diamond-like amorphous carbon and the coating of each inner wall of the body comprises tungsten disulphide. ### Claim 11 A cam follower roller device comprising: a body; a shaft mounted on the body; and a roller mounted on the said shaft in a rotationally movable manner and comprising two end faces, each of the said faces being arranged at least in part axially facing an inner wall of the body, a plain bearing interposed radially between the shaft and the roller, wherein at least one of the end faces of the roller and at least one of the inner walls of the body comprise at least one of an antifriction coating and a wear-resistant coating, and wherein at least one of the end faces of the plain bearing comprises at least one of the antifriction coating and the wear-resistant coating.