# US 2014/0190786 A1 · Clutch Engagement Mechanism > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0190786 A1 - Document ID: US20140190786A1 - Status: Published application - Kind: A1 - Application number: 14/150,329 - Filed: 2014-01-08 - Published: 2014-07-10 - Earliest claimed: 2013-01-09 - Assignees: Mark Patterson - Inventors: Mark Patterson - Web page: https://patentgrep.com/patent/US20140190786A1 ## CPC - F16D 23/12: Mechanical clutch-actuating mechanisms arranged outside the clutch as such (specific for combined clutches F16D21/00; mechanisms specific for synchronisation F16D23/02) - F16D 2125/60: Cables or chains, e.g. Bowden cables - F16D 2125/64: Levers - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES ## Abstract A clutch engagement mechanism is provided, including a rotational shaft coupled to a clutch plate to engage and disengage the clutch plate in a clutch assembly, an arm extending from the rotational shaft to apply a rotating force to the rotational shaft, and a rotational pulley coupled to a distal end of the arm so as to rotate about a point at the distal end of the arm, and to receive a clutch control cable that provides a rotating force to the rotational pulley and the rotational shaft. ## Claims ### Claim 1 A clutch engagement mechanism comprising: a rotational shaft coupled to a clutch plate to engage and disengage the clutch plate in a clutch assembly; an arm extending from the rotational shaft to apply a rotating force to the rotational shaft; and a rotational pulley coupled to a distal end of the arm so as to rotate about a point at the distal end of the arm, and to receive a clutch control cable that provides a rotating force to the rotational pulley and the rotational shaft. ### Claim 2 (depends on 1) The clutch engagement mechanism of claim 1, further comprising a clutch lever coupled to a first end of the clutch control cable. ### Claim 3 (depends on 2) The clutch engagement mechanism of claim 2, wherein the clutch engagement mechanism is provided to a motorcycle, and the clutch lever is attached to handlebar of the motorcycle. ### Claim 4 (depends on 2) The clutch engagement mechanism of claim 2, further comprising an attachment block coupled to a second end of the clutch control cable. ### Claim 5 (depends on 4) The clutch engagement mechanism of claim 4, wherein the position of the attachment block is fixed such that engagement of the clutch lever causes the pulling force transferred to the clutch control cable to rotate the rotational pulley and move the arm of the clutch engagement mechanism. ### Claim 6 (depends on 1) The clutch engagement mechanism of claim 1, wherein the rotational pulley is provided with a groove around a circumference thereof to accommodate the clutch control cable. ### Claim 7 (depends on 1) The clutch engagement mechanism of claim 1, wherein the rotational shaft is coupled to a control rod that is coupled to the clutch plate. ### Claim 8 (depends on 1) The clutch engagement mechanism of claim 1, wherein the rotational pulley is substantially circular and concentric to the point at the distal end of the arm about which the rotational pulley rotates. ### Claim 9 (depends on 1) The clutch engagement mechanism of claim 1, wherein the rotational pulley is configured such that a perimeter of the rotational pulley is eccentric to the point at the distal end of the arm about which the rotational pulley rotates. ### Claim 10 (depends on 9) The clutch engagement mechanism of claim 9, wherein the rotational pulley is configured in a cam shape. ### Claim 11 (depends on 9) The clutch engagement mechanism of claim 9, wherein the rotational pulley includes a groove around a portion of the circumference thereof to accommodate the clutch control cable, and a cable receiving section extending between two points of the groove to receive a portion of the clutch control cable across the rotational pulley. ### Claim 12 (depends on 11) The clutch engagement mechanism of claim 11, wherein the cable receiving section includes a securing member receiving section to accommodate a securing member to fix the clutch control cable to the rotational pulley. ### Claim 13 (depends on 1) The clutch engagement mechanism of claim 1, wherein the rotational pulley is configured as a two-tiered pulley having a first tier adjacent to a second tier, the first tier being concentric to the second tier and having a larger diameter than the second tier; and wherein each of the first and second tiers each include a groove at least partially around the respective circumferences thereof to receive the clutch control cable. ### Claim 14 (depends on 13) The clutch engagement mechanism of claim 13, wherein the grooves of the first and second tiers are connected by a communication recess provided on a surface of the first tier adjacent to the second tier. ### Claim 15 (depends on 13) The clutch engagement mechanism of claim 13, wherein the first tier is coupled to a fixed point by the clutch control cable, and the second tier is coupled to a clutch lever by the clutch control cable. ### Claim 16 A clutch engagement mechanism comprising: a rotational shaft coupled to a clutch plate to engage and disengage the clutch plate in a clutch assembly; an arm extending from the rotational shaft to apply a rotating force to the rotational shaft; and a rotational member coupled to a distal end of the arm so as to rotate about a point at the distal end of the arm, the rotational member being configured to contact a rotational control member at a fixed or varying distance away from the point at the distal end of the arm about which the rotational member rotates to reduce a force required to rotate the distal end of the arm. ### Claim 17 (depends on 16) The clutch engagement mechanism of claim 16, wherein a rotation axis of the rotational member is substantially parallel to a rotation axis of the rotational shaft. ### Claim 18 (depends on 16) The clutch engagement mechanism of claim 16, wherein the rotational control member is a clutch control cable having a first end coupled to a clutch lever, and a second end at a fixed point, a portion of the clutch control cable being accommodated by the rotational member. ### Claim 19 (depends on 18) The clutch engagement mechanism of claim 18, wherein the rotational member is configured so as to have a circumference that is eccentric to a rotational center of the rotational member, and such that a first point at which the clutch control cable extends from the rotational member to the clutch lever is closer to the rotational center than is a second point at which the clutch control cable extends from the rotational member to the fixed point. ### Claim 20 (depends on 18) The clutch engagement mechanism of claim 18, wherein the rotational member is configured as a two-tiered pulley having a first tier adjacent to a second tier, the first tier being concentric to the second tier and having a larger diameter than the second tier, and such that a first point at which the clutch control cable extends from the second tier to the clutch lever is closer to the rotational center than is a second point at which the clutch control cable extends from the first tier to the fixed point.