# US 5,704,862 A · Dual sided poly-V drive belt and pulley therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,704,862 A - Document ID: US5704862A - Status: Granted - Kind: A - Application number: 08/782,389 - Filed: 1997-01-13 - Granted: 1998-01-06 - Earliest claimed: 1997-01-13 - Assignees: The Goodyear Tire & Rubber Company - Inventors: Michel Leroy Janne; Steven Mark Anderson - Web page: https://patentgrep.com/patent/US5704862A ## CPC - F16H 55/49: Features essential to V-belts pulleys - F16G 5/20: with a contact surface of special shape, e.g. toothed - F16H: GEARING - F16G: BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR ## Abstract This invention relates to dual-sided multi-ribbed power transmission belts having a plurality of longitudinally extending, transversely spaced alternating ribs and grooves with the ribs having a distance between their midpoints of a pitch P on both sides of the belt. The grooves on opposite sides of the belt are transversely offset from each by a distance of P/2. ## Claims ### Claim 1 A dual-sided, multi-ribbed power transmission belt comprising a primary side having a plurality of longitudinally extending, transversely spaced alternating ribs and grooves, the ribs having a distance between their midpoints of pitch P; a secondary side having a plurality of longitudinally extending, transversely spaced alternating inner ribs and grooves, said inner ribs having a distance between their midpoints of a pitch P; a layer of longitudinally disposed tension members between the primary side and the secondary side; wherein the grooves on the secondary side are transversely offset across the tension member layer from the grooves on the primary side by a distance of P/2. ### Claim 2 (depends on 1) The belt of claim 1 further comprising on the secondary side a pair of outer ribs. ### Claim 3 (depends on 2) The belt of claim 2 wherein the outer ribs have a width W equal to 1.5 P. ### Claim 4 (depends on 2) The belt of claim 2 wherein the outer ribs have a width W equal to 0.5 P. ### Claim 5 (depends on 1) The belt according to claim 1 further comprising a layer of transverse reinforcement between the tension members and the primary side ribs. ### Claim 6 (depends on 1) The belt according to claim 1 further comprising a layer of transverse reinforcement between the tension member and the secondary side ribs. ### Claim 7 (depends on 1) The belt according to claim 1 further comprising transverse grooves on the secondary side which are oriented other than perpendicular to the longitudinal direction of the belt such that any transverse grooves in immediately adjacent longitudinal ribs are offset from each other in the longitudinal direction by a distance of from 10% to 50% of the longitudinal spacing of the grooves. ### Claim 8 (depends on 1) The belt according to claim 1 further comprising transverse grooves on the primary side which are oriented other than perpendicular to the longitudinal direction of the belt such that any transverse grooves in immediately adjacent longitudinal ribs are offset from each other in the longitudinal direction by a distance of from 10% to 50% of the longitudinal spacing of the grooves. ### Claim 9 A pulley having an outer peripheral ribbed surface comprising a plurality of circumferentially disposed and axially alternating inner projections and land areas and a pair of outer surfaces, wherein the distance between the peaks of the inner projections is equal to a pitch P and the distance between the outermost inner projections and the outer surfaces is 1.5 P. ### Claim 10 A pulley having an outer peripheral ribbed surface comprising a plurality of circumferentially disposed and axially alternating inner projections and land areas and a pair of outer surfaces, wherein the distance between the peaks of the inner projections is equal to a pitch P and the distance between the outermost inner projections and the outer surfaces is P/2. ### Claim 11 A combination of a dual-sided multi-ribbed belt and a secondary side pulley comprising a belt having a primary side, a secondary side and a layer of longitudinally disposed tension members therebetween; wherein the primary side has a plurality of longitudinally extending, transversely spaced alternating ribs and grooves, the ribs having a width between the grooves equal to a pitch P; wherein the secondary side has a plurality of longitudinally extending, transversely spaced, alternating inner ribs and grooves, said inner ribs having a width between their midpoints equal to a pitch P; and a pair of outer ribs having widths of 1.5 P; wherein the grooves on the secondary side are transversely offset across the tension member layer from the grooves on the primary side by a distance P/2; the secondary side pulley having an outer peripheral ribbed surface comprising a plurality of circumferentially disposed and axially alternating inner projections and land areas and a pair of outer surfaces, wherein the distance between the peaks of the inner projections is equal to a pitch P and the distance between the outermost inner projections and the outer surfaces is 1.5 P. ### Claim 12 A combination of a dual-sided multi-ribbed belt and a secondary side pulley comprising a belt having a primary side, a secondary side and a layer of longitudinally disposed tension members therebetween; wherein the primary side has a plurality of longitudinally extending, transversely spaced alternating ribs and grooves, the ribs having a width between the grooves equal to a pitch P; wherein the secondary side has a plurality of longitudinally extending, transversely spaced, alternating inner ribs and grooves, said inner ribs having a width between their midpoints equal to a pitch P; and a pair of outer ribs having widths of P/2; wherein the grooves on the secondary side are transversely offset across the tension member layer from the grooves on the primary side by a distance P/2; the secondary side pulley having an outer peripheral ribbed surface comprising a plurality of circumferentially disposed and axially alternating inner projections and land areas and a pair of outer surfaces, wherein the distance between the peaks of the inner projections is equal to a pitch P and the distance between the outermost inner projections and the outer surfaces is P/2.