# US 8,540,257 B1 · Dynamic steering stabilizer device for vehicles > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,540,257 B1 - Document ID: US8540257B1 - Status: Granted - Kind: B1 - Application number: 13/666,597 - Filed: 2012-11-01 - Granted: 2013-09-24 - Earliest claimed: 2012-11-01 - Assignees: Automatic Equipment Manufacturing Company - Applicants: David Merchant; Tyler Swartz - Inventors: David Merchant; Tyler Swartz - Web page: https://patentgrep.com/patent/US8540257B1 ## CPC - B62D 7/22: Arrangements for reducing or eliminating reaction, e.g. vibration, from parts, e.g. wheels, of the steering system - F16F 9/0218: {Mono-tubular units (F16F9/0227, F16F9/0236, F16F9/0245 take precedence)} - F16F 9/3221: {of piston rods} - 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) - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION ## Abstract A steering stabilizer includes a device connecting a fixed part of a vehicle to a steering mechanism of the vehicle, a control mechanism, and a centering mechanism. The control mechanism, which normally maintains an equilibrium configuration, includes a first member connected to a cylinder portion of a gas spring and a second member secured to a rod portion of the gas spring. A centering mechanism maintains alignment of the gas spring with the device. When the stabilizer is extended from the equilibrium configuration, the gas spring is activated to responsively and automatically return the stabilizer to the equilibrium configuration; and when the device is compressed from the equilibrium configuration, the gas spring is activated to responsively and automatically return the stabilizer to the equilibrium configuration. ## Claims ### Claim 1 An apparatus for stabilizing the steering of a vehicle, comprising: (a) a device having: (1) a proximal end (12) connectable to a fixed part of a vehicle, and a distal end (16) connectable to a movable part of a steering mechanism of the vehicle, and (2) a housing having a proximal end (22) connected to proximal end (12) of the device, a distal end (24), and a sidewall which forms a cavity with a longitudinal axis; (b) a control mechanism structured to maintain the device in an equilibrium configuration wherein the vehicle normally travels unassistedly along a straightaway, the control mechanism including: (1) a gas spring having a cylinder portion and a rod portion with a distal end (50), (2) a first member connected to the cylinder portion and structured to be displaceable along the longitudinal axis, and (3) a second member secured to distal end (50) of the rod portion and structured to be displaceable along the longitudinal axis; and (c) a centering mechanism structured to maintain the gas spring in alignment with the longitudinal axis; (d) wherein, as driving conditions cause the device to be extended from the equilibrium configuration, the first member and the cylinder portion are displaced toward the second member whereupon the gas spring is activated thereby responsively and automatically urging the device to return to the equilibrium configuration, and as driving conditions cause the device to be compressed from the equilibrium configuration, the second member and the rod portion are displaced toward the first member whereupon the gas spring is activated thereby responsively and automatically urging the device to return to the equilibrium configuration. ### Claim 2 (depends on 1) An apparatus as defined in claim 1, wherein the control mechanism includes: (a) the distal end (24) of the housing having at least one off-center orifice (34) having diameter (36); (b) the second member having an off-center orifice (96) aligned with each at least one orifice (34) of the distal end of the housing, each orifice (96) having a diameter (88), which is smaller than diameter (36) of the distal end of the housing; (c) the first member having a central orifice (80) slidably surrounding the cylinder portion of the gas spring, and an off-center orifice (86) aligned with each at least one orifice (34) of the distal end of the housing; (d) a displacement rod aligned with each at least one orifice (34) of the distal end of the housing and connecting the first member to distal end (16) of the device, each displacement rod having a diameter (106), which is smaller than diameter (88) of the first and second members. ### Claim 3 (depends on 1) An apparatus as defined in claim 1, wherein the control mechanism includes: (a) the distal end (24) of the housing having at least one off-center orifice (34) having diameter (36); (b) the second member having an off-center orifice (96) aligned with each at least one orifice (34) of the distal end of the housing, each orifice (96) having a diameter (88) which is smaller than diameter (36) of the distal end of the housing; (c) the first member having a central orifice (80) slidably surrounding the cylinder portion of the gas spring, and an off-center orifice (86) aligned with each at least one orifice (34) of the distal end of the housing; (d) a displacement rod aligned with each at least one orifice (34) of the distal end of the housing and connecting the first member to distal end (16) of the device, each displacement rod including: (1) an inner rod portion normally extending from the first member to and through the second member and having a diameter (106), which is smaller than diameter (88) of the first and second members, and (2) an outer rod portion normally extending from the second member to distal end (16) of the device and having diameter (128), which is greater than diameter (88) of the second member but smaller than diameter (36) of the distal end of the housing. ### Claim 4 (depends on 1) An apparatus as defined in claim 1, wherein the control mechanism includes: (a) distal end (24) of the housing having at least one off-center orifice (34) with diameter (36); (b) the second member having an off-center orifice (96) aligned with each at least one orifice (34) of the distal end of the housing, each orifice (96) having a diameter (88), which is smaller than diameter (36) of the distal end of the housing; (c) the first member having a central orifice (80) slidably surrounding the cylinder portion of the gas spring, and an off-center orifice (86) aligned with each at least one orifice (34) of the distal end of the housing; (d) a displacement rod aligned with each at least one orifice (34) of the distal end of the housing and connecting the first member to the distal end (16) of the device, each displacement rod having a diameter (106) smaller than diameter (88) of the first and second members; and (e) a sleeve surrounding each displacement rod and having a length equal to the distance between the second member and distal end (16) of the device in the equilibrium configuration, and having a diameter (128) which is greater than diameter (88) of the second member but smaller than diameter (36) of the distal end of the housing. ### Claim 5 (depends on 1) An apparatus as defined in claim 1, wherein a swivel mechanism is structured to connect proximal end (22) of the housing to proximal end (12) of the device. ### Claim 6 (depends on 1) An apparatus as defined in claim 1, wherein the centering portion includes a guide tube surrounding the cylinder portion and secured to the proximal end (12) of the housing, the cylinder portion being slidably displaceable in the guide tube along the longitudinal axis. ### Claim 7 (depends on 1) An apparatus as defined in claim 1, wherein the centering portion includes a spacer secured to the cylinder portion, the spacer being structured to be slidably displaceable in the cavity along the longitudinal axis. ### Claim 8 (depends on 1) An apparatus as defined in claim 1, wherein the distal end (24) of the housing is removably secured to the sidewall. ### Claim 9 (depends on 1) An apparatus as defined in claim 1, wherein: (a) the first member includes an off-center orifice (84) aligned with each at least one orifice (34) of the distal end of the housing; (b) each displacement rod includes a proximal end (110) extending through a respective orifice (86) of the first member and threadably mated with a fastener; and (c) the cylinder portion includes a peripheral groove with a retainer, the first member normally being sandwiched between the retainer and each fastener. ### Claim 10 (depends on 1) An apparatus as defined in claim 1 wherein the at least one orifice (34) of the distal end of the housing includes three off-center orifices (34) spaced equiangularly around the longitudinal axis. ### Claim 11 (depends on 1) An apparatus as defined in claim 1 wherein the first member includes two side-by-side disks, one constructed of steel or other suitably rugged material, and the other constructed of nylon or other suitable material. ### Claim 12 An apparatus for stabilizing the steering of a vehicle, comprising: (a) a device having: (1) a proximal end (12) connectable to a fixed part of a vehicle, (2) a distal end (16) connectable to a movable part of a steering mechanism of the vehicle, and (3) a housing having a proximal end (22) connected to proximal end (12) of the device, a distal end (24), and a sidewall which forms a cavity with a longitudinal axis, the distal end (24) including a plurality of off-center orifices (34) having a diameter (36) and spaced equiangularly around the longitudinal axis; (b) a control mechanism structured to maintain the device in an equilibrium configuration wherein the vehicle normally travels unassistedly along a straightaway, the control mechanism including: (1) a gas spring having a rod portion with a distal end (50) and a cylinder portion having a peripheral groove with a retainer, (2) a first member having a central orifice (80) slidably surrounding the cylinder portion of the gas spring and structured to be displaceable along the longitudinal axis, and off-center orifices (86) with diameter (88) aligned with orifices (34) of the distal end of the housing, (3) a second member secured to distal end (50) of the rod portion and structured to be displaceable along the longitudinal axis, the second member including a plurality of off-center orifices (96) aligned with, and having a diameter (88) which is smaller than diameter (36) of, orifices (34) of the distal end of the housing, (4) a plurality of displacement rods having a proximal end and a distal end connecting the first member to distal end (16) of the device and having a diameter (106) smaller than diameter (88) of the first and second members and respectively aligned with orifices (34) of the distal end of the housing, each proximal end extending through a respective orifice (82) of the first member and threadably mated with a fastener wherein the first member is normally sandwiched between the retainer and the fasteners, and (5) a sleeve surrounding each displacement rod and normally extending from the second member to the distal end (16) of the device in the equilibrium configuration, each sleeve having a diameter (128) which is greater than diameter (88) of orifices (96) of the second member but smaller than diameter (36) of the distal end of the housing; and (c) a centering mechanism structured to maintain the gas spring in alignment with the longitudinal axis; (d) wherein, as driving conditions cause the device to be extended from the equilibrium configuration, the first member and the cylinder portion are displaced toward the second member whereupon the gas spring is activated thereby responsively and automatically urging the device to return to the equilibrium configuration, and as driving conditions cause the device to be compressed from the equilibrium configuration, the second member and the rod portion are displaced toward the first member whereupon the gas spring is activated thereby responsively and automatically urging the device to return to the equilibrium configuration.