# US 8,770,848 B2 · Axle bearing system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,770,848 B2 - Document ID: US8770848B2 - Status: Granted - Kind: B2 - Application number: 12/737,390 - Filed: 2009-07-07 - Published: 2011-06-02 - Granted: 2014-07-08 - Earliest claimed: 2008-07-08 - Assignees: Jtekt Corporation - Applicants: Yutaka Koma; Shigeaki Furusawa; Keiichi Furukawa; Shigeru Inoue - Inventors: Yutaka Koma; Shigeaki Furusawa; Keiichi Furukawa; Shigeru Inoue - Web page: https://patentgrep.com/patent/US8770848B2 ## CPC - B60B 27/001: {with roller-bearings} - F16C 19/52: with devices affected by abnormal or undesired conditions - F16C 33/7813: {for tapered roller bearings} - F16C 33/7879: {with a further sealing ring} - F16C 41/002: {Conductive elements, e.g. to prevent static electricity} - F16J 15/064: {the packing combining the sealing function with other functions} - F16J 15/3264: the elements being separable from each other - F16J 15/3284: characterised by their structure; Selection of materials - F16J 15/3456: {without external means for pressing the ring against the face, e.g. slip-ring with a resilient lip} - F16C 19/386: {in O-arrangement} - F16C 2202/32: Conductivity - F16C 2326/02: Wheel hubs or castors - B60B: VEHICLE WHEELS (making wheels or wheel parts by rolling B21H1/00, by forging, hammering or pressing B21K1/28); CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS - F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS ## Abstract An axle bearing system includes a bearing portion which includes an inner ring, an outer ring and a plurality of rolling elements which are interposed between the inner ring and the outer ring and which is installed on a hub shaft with seal portions which are each formed by a slinger, a core metal and a non-conductive seal provided therebetween mounted in annular opening portions formed between the inner ring and the outer ring. A conductive body is attached to the seal portion so as to provide an electrical conducting state between the outer ring and the inner ring. ## Claims ### Claim 1 An axle bearing system comprising: an inner ring; an outer ring, an annular opening portion being formed between the inner ring and the outer ring; a plurality of rolling elements interposed between the inner ring and the outer ring; a seal portion that comprises a slinger provided in the annular opening portion, a core metal provided in the annular opening portion and a non-conductive seal provided between the slinger and the core metal; and a conductive body attached to the seal portion to provide an electrical conducting state between the outer ring and the inner ring. ### Claim 2 (depends on 1) The axle bearing system according to claim 1, wherein the conductive body is formed substantially into a cylindrical shape and includes a side attached to the core metal of the seal portion and an other side contacting a hub shaft. ### Claim 3 (depends on 1) The axle bearing system according to claim 1, wherein the conductive body is formed substantially into an annular shape and includes a radially inner side attached to the slinger of the seal portion and a radially outer side contacting the core metal of the seal portion or the outer ring. ### Claim 4 (depends on 1) The axle bearing system according to claim 1, wherein the conductive body is formed of a synthetic rubber comprising electrical conductivity. ### Claim 5 (depends on 1) The axle bearing system according to claim 1, wherein the conductive body is attached to at least one of the core metal and the slinger. ### Claim 6 (depends on 1) The axle bearing system according to claim 1, wherein the conductive body comprises a lip portion which slidably contacts a flange. ### Claim 7 (depends on 1) The axle bearing system according to claim 1, wherein the conductive body is attached to the outer ring. ### Claim 8 (depends on 1) The axle bearing system according to claim 1, further comprising a plurality of seal portions, wherein the conductive body is attached to a seal portion of the plurality of seal portions. ### Claim 9 (depends on 1) The axle bearing system according to claim 1, wherein the conductive body is attached to at least one of an inner circumferential surface of the core metal and an outer circumferential surface of the core metal. ### Claim 10 (depends on 1) The axle bearing system according to claim 1, wherein the conductive body is attached to the slinger on a side of the slinger which is axially opposite to the non-conductive seal. ### Claim 11 (depends on 1) The axle bearing system according to claim 1, wherein the conductive body is attached to the seal portion via a groove formed in the conductive body. ### Claim 12 (depends on 1) The axle bearing system according to claim 1, wherein the conductive body is attached to an outer circumferential end portion of the slinger. ### Claim 13 (depends on 1) The axle bearing system according to claim 1, wherein a lip portion provided on an outer circumference of the conductive body is brought into abutment with the outer ring or a cylindrical portion of the core metal fixed to the outer ring. ### Claim 14 (depends on 1) The axle bearing system according to claim 1, wherein the conductive body is attached to an inner circumferential surface of the core metal and an outer circumferential surface of the core metal. ### Claim 15 An axle bearing system comprising: a hub shaft; a bearing portion attached to the hub shaft, the bearing portion comprising: an inner ring; an outer ring, an annular opening portion being formed between the inner ring and the outer ring; a plurality of rolling elements interposed between the inner ring and the outer ring; a seal portion that comprises a slinger provided in the annular opening portion, a core metal provided in the annular opening portion and a non-conductive seal provided between the slinger and the core metal; and a driveshaft comprising an annular conductive member which contacts the outer ring of the bearing portion and on which the hub shaft is mounted. ### Claim 16 (depends on 15) The axle bearing system according to claim 15, wherein the conductive body is formed of a synthetic rubber comprising electrical conductivity. ### Claim 17 (depends on 15) The axle bearing system according to claim 15, wherein the annular conductive member comprises a lip portion which slidably contacts a wall surface of a flange of the hub shaft.