# US 10,501,110 B2 · Steering system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,501,110 B2 - Document ID: US10501110B2 - Status: Granted - Kind: B2 - Application number: 15/910,523 - Filed: 2018-03-02 - Published: 2018-09-06 - Granted: 2019-12-10 - Earliest claimed: 2017-03-06 - Assignees: Yamada Manufacturing Co., Ltd. - Applicants: Yamada Manufacturing Co., Ltd. - Inventors: Toshihito Osawa; Minoru Takakusaki - Web page: https://patentgrep.com/patent/US10501110B2 ## CPC - B62D 1/192: {Yieldable or collapsible columns} - B62D 1/184: Mechanisms for locking columns at selected positions - B62D 1/185: adjustable by axial displacement, e.g. telescopically (B62D1/183, B62D1/187, B62D1/19 take precedence) - B62D 1/195: {Yieldable supports for the steering column} - B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M) ## Abstract A steering system includes an inner column; an outer column including a guide tube part that supports the inner column to be movable in an axial direction and a holding tube part in which a slit extending in the axial direction is formed; and a telescopic adjustment mechanism that switches between a locked state in which an interval of the slit is reduced and movement of the inner column is regulated and an unlocked state in which the interval of the slit is increased and the movement of the inner column is allowed. An inner circumferential surface of the guide tube part has support surfaces that slidably support an outer circumferential surface of the inner column, and flanks located on the same circumference as the support surfaces and are separated from the outer circumferential surface of the inner column in a radial direction. ## Claims ### Claim 1 A steering system comprising: an inside member configured to extend along an axis and to have a steering wheel mounted on a first end side in an axial direction; an outside member comprising a guide tube part into which the inside member is inserted to support the inside member to be movable in the axial direction, and a holding part which is located on the first end side in the axial direction with respect to the guide tube part and in which a slit extending in the axial direction is formed; and a telescopic adjustment mechanism configured to switch between a locked state in which an interval of the slit is reduced and movement of the inside member relative to the outside member is regulated by the holding part and an unlocked state in which the interval of the slit is increased and the movement of the inside member relative to the outside member is allowed, wherein an inner circumferential surface of the guide tube part comprises: support surfaces that slidably support an outer circumferential surface of the inside member, and flanks that are located on the same circumference as the support surfaces and are separated from the outer circumferential surface of the inside member in a radial direction. ### Claim 2 (depends on 1) The steering system according to claim 1, wherein: the support surfaces are arranged at positions facing each other in an upward/downward direction of a vehicle in a front view in the axial direction; and the flanks are arranged at positions facing each other in a width direction of the vehicle in the front view in the axial direction. ### Claim 3 (depends on 1) The steering system according to claim 1, wherein: an inner shape of the guide tube part is formed in an oval shape; portions of the guide tube part which face each other in a direction of a minor axis are set as the support surfaces; and portions of the guide tube part which face each other in a direction of a major axis are set as the flanks. ### Claim 4 (depends on 1) The steering system according to claim 1, wherein an opening passing through the outside member in the radial direction are formed at portions of the outside member which are located on a second end side in the axial direction with respect to the guide tube part. ### Claim 5 A steering system comprising: an inside member configured to extend along an axis and to have a steering wheel mounted on a first end side in an axial direction; an outside member comprising a guide tube part into which the inside member is inserted to support the inside member to be movable in the axial direction, and a holding part that is located on the first end side in the axial direction with respect to the guide tube part; and a telescopic adjustment mechanism configured to switch between a locked state in which movement of the inside member relative to the outside member is regulated by the holding part and an unlocked state in which the movement of the inside member relative to the outside member is allowed, wherein an inner circumferential surface of the guide tube part comprises: support surfaces that slidably support an outer circumferential surface of the inside member, and flanks that are located on the same circumference as the support surfaces and are separated from the outer circumferential surface of the inside member in a radial direction.