# US 11,027,627 B2 · Adjustment mechanism for a power seat > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,027,627 B2 - Document ID: US11027627B2 - Status: Granted - Kind: B2 - Application number: 16/441,590 - Filed: 2019-06-14 - Published: 2020-12-17 - Granted: 2021-06-08 - Earliest claimed: 2019-06-14 - Assignees: GM Global Technology Operations LLC - Applicants: GM Global Technology Operations LLC - Inventors: Nithish Sukumar; Prathiba R - Web page: https://patentgrep.com/patent/US11027627B2 ## CPC - B60N 2/067: {by linear actuators, e.g. linear screw mechanisms} - B60N 2/02246: {Electric motors therefor} - B60N 2/929: {linear} - F16H 25/20: Screw mechanisms (with automatic reversal F16H25/12) - B60N 2/02253: {characterised by the transmission between the electric motor and the seat or seat parts} - F16H 2025/2084: {Perpendicular arrangement of drive motor to screw axis} - B60N: SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR - F16H: GEARING ## Abstract An adjustment mechanism for a motor vehicle seat includes an annular motor with an inner nut housed in a rotor, a bracket attached to the seat, the annular motor being positioned in the bracket, and a lead screw that is threaded through the inner nut. When the annular motor is activated the rotor as well as the inner nut rotate about the lead screw resulting in relative translational motion of the bracket and hence the seat relative to the lead screw. ## Claims ### Claim 1 An adjustment mechanism for a motor vehicle seat, the adjustment mechanism comprising: an annular motor with an inner nut housed in a rotor; a bracket attached to the seat, the annular motor being positioned in the bracket; and a lead screw that is threaded through the inner nut; a single main motor; and a single gear box, the single main motor being directly coupled to the single gear box, the single gear box being coupled to the lead screw, wherein when the annular motor is activated the rotor as well as the inner nut rotate about the lead screw resulting in relative translational motion of the bracket and hence the seat relative to the lead screw. ### Claim 2 (depends on 1) The adjustment mechanism of claim 1 further comprising a roller guide that is enables movement of the bracket relative to a floor of a cabin. ### Claim 3 (depends on 1) The adjustment mechanism of claim 1, wherein the annular motor includes a stator that surrounds the rotor. ### Claim 4 (depends on 3) The adjustment mechanism of claim 3, wherein a winding is housed within the stator. ### Claim 5 (depends on 1) The adjustment mechanism of claim 1, wherein when the main motor is activated, the lead screw rotates within the inner nut resulting in relative translational motion of the bracket and hence the seat relative to the lead screw. ### Claim 6 (depends on 5) The adjustment mechanism of claim 5, wherein when both the main motor and the annular motor are activated, the lead screw rotates with a first rotational direction and the rotor and hence the inner nut rotate in a second rotational direction that is opposite to the first rotational direction, the rotation of the lead screw and the rotation of the inner nut acting as a multiplier to a speed of movement of the bracket relative to the lead screw. ### Claim 7 (depends on 1) The adjustment mechanism of claim 1 further comprising a controller that is electrically connected to the annular motor and the main motor. ### Claim 8 (depends on 7) The adjustment mechanism of claim 7 further comprising an energy source that provides power to the annular motor and the main motor. ### Claim 9 An adjustment mechanism for a motor vehicle seat, the adjustment mechanism comprising: an annular motor with an inner nut housed in a rotor; a bracket attached to the seat, the annular motor being positioned in the bracket; a lead screw that is threaded through the inner nut, the rotor as well as the inner nut rotating about the lead screw when the annular motor is activated resulting in relative translational motion of the bracket and hence the seat relative to the lead screw; a single main motor; and a single gear box, the single main motor being directly coupled to the single gear box, the single gear box being coupled to the lead screw, the lead screw rotating within the inner nut when the main motor is activated resulting in relative translational motion of the bracket and hence the seat relative to the lead screw. ### Claim 10 (depends on 9) The adjustment mechanism of claim 9, wherein when both the main motor and the annular motor are activated, the lead screw rotates with a first rotational direction and the rotor and hence the inner nut rotate in a second rotational direction that is opposite to the first rotational direction, the rotation of the lead screw and the rotation of the inner nut acting as a multiplier to a speed of movement of the bracket relative to the lead screw. ### Claim 11 (depends on 9) The adjustment mechanism of claim 9 further comprising a roller guide that is enables movement of the bracket relative to a floor of a cabin. ### Claim 12 (depends on 9) The adjustment mechanism of claim 9, wherein the annular motor includes a stator that surrounds the rotor. ### Claim 13 (depends on 12) The adjustment mechanism of claim 12, wherein a winding is housed within the stator. ### Claim 14 (depends on 9) The adjustment mechanism of claim 9 further comprising a controller that is electrically connected to the annular motor and the main motor. ### Claim 15 (depends on 14) The adjustment mechanism of claim 14 further comprising an energy source that provides power to the annular motor and the main motor. ### Claim 16 A seat assembly for a motor vehicle, the seat assembly comprising: an adjustment mechanism that includes: an annular motor with an inner nut housed in a rotor; a bracket attached to the seat, the annular motor being positioned in the bracket; a lead screw that is threaded through the inner nut, the rotor as well as the inner nut rotating about the lead screw when the annular motor is activated resulting in relative translational motion of the bracket and hence the seat relative to the lead screw; a single main motor; and a single gear box, the single main motor being directly coupled to the single gear box, the single gear box being coupled to the lead screw the lead screw rotating within the inner nut when the main motor is activated resulting in relative translational motion of the bracket and hence the seat relative to the lead screw; and a roller guide that is enables movement of the seat relative to a floor of a cabin. ### Claim 17 (depends on 16) The seat assembly of claim 16, wherein when both the main motor and the annular motor are activated, the lead screw rotates with a first rotational direction and the rotor and hence the inner nut rotate in a second rotational direction that is opposite to the first rotational direction, the rotation of the lead screw and the rotation of the inner nut acting as a multiplier to a speed of movement of the bracket relative to the lead screw.