Mobile elliptically driven device and steering mechanism

A wheeled vehicle comprising a steering mechanism capable of altering the toe angle in conjunction with camber angle of a wheel, the mechanism comprising a dextral wheel assembly, a sinistral wheel assembly, and an upright member configured to lean relative to the wheel assemblies, the dextral wheel assembly comprising:

• (a) a dextral wheel having an axis of rotation, a toe angle, and a caster angle
• (b) a dextral steering knuckle fastened to the wheel comprising a dextral steering arm;
• (c) a dextral kingpin positioned such that the dextral steering knuckle is free to swivel about the swivel axis of the dextral kingpin, said dextral kingpin having a caster angle and a KPI;
• (d) a dextral kingpin bracket bracketing the dextral kingpin;
• (e) a dextral steering linkage having an inboard end and an outboard end, the outboard end fastened to the dextral steering arm in a configuration to control the degree of swivel of the dextral steering knuckle about the swivel axis of the dextral kingpin, the inboard end fastened to the upright member at a first dextral attachment point;
• (f) a dextral support member supportingly fastened to the kingpin bracket;
• the sinistral wheel assembly comprising:
• (g) a sinistral wheel having an axis of rotation, a toe angle, and a camber angle;
• (h) a sinistral steering knuckle fastened to the wheel comprising a sinistral steering arm;
• (i) a sinistral kingpin positioned such that the sinistral steering knuckle is free to swivel about the swivel axis of the sinistral kingpin, said sinistral kingpin having a caster angle and a KPI;
• (j) a sinistral kingpin bracket bracketing the sinistral kingpin;
• (k) a sinistral steering linkage having an inboard end and an outboard end, the outboard end fastened to the sinistral steering arm in a configuration to control the degree of swivel of the sinistral steering knuckle about the swivel axis of the sinistral kingpin, the inboard end fastened to the upright member at a first sinistral attachment point;
• and
• (l) a sinistral support member supportingly fastened to the kingpin bracket;
• the vehicle further comprising
• a pair of elongate striding members, adapted to receive the feet of said user and support said user while ambulating, having a front pivot end and a rearward drive end;
• and
• a rear wheel comprising a drive assembly selected from the group consisting of:
• a chain-and-sprocket drive assembly comprising a chain ring forward of the rear wheel that receives rotational motion from the rearward drive end of at least one striding member, a drive chain that is engaged to the chain ring, and a sprocket that is engaged to the drive chain and is configured to impart rotational motion to the rear wheel;
• and
• an internally geared hub drive assembly, comprising a hub body, an axle, and an internal gear system.

A steering mechanism capable of altering the toe angle in conjunction with camber angle of a wheel, the mechanism comprising:

• (a) an upright member;
• (b) a dextral wheel assembly comprising
• (i) a dextral wheel having an axis of rotation, a toe angle, and a camber angle;
• (ii) a dextral steering knuckle fastened to the dextral wheel comprising a dextral steering arm;
• (iii) a dextral kingpin having a swivel axis, a caster angle, and a KPI, the dextral kingpin positioned within the dextral steering knuckle such that the dextral steering knuckle is free to swivel about the swivel axis;
• (iv) a dextral kingpin bracket bracketing the dextral kingpin;
• (v) a dextral steering linkage having an inboard end and an outboard end, the outboard end fastened to the dextral steering arm in a configuration to control the degree of swivel of the dextral steering knuckle about the swivel axis, the inboard end fastened to the upright member at a first dextral attachment point;
• and
• (vi) a dextral support member supportingly fastened to the dextral kingpin bracket;
• (c) a sinistral wheel assembly comprising
• (i) a sinistral wheel having an axis of rotation, a toe angle, and a camber angle;
• (ii) a sinistral steering knuckle fastened to the sinistral wheel comprising a sinistral steering arm;
• (iii) a sinistral kingpin having a swivel axis, a caster angle, and a KPI, the sinistral kingpin positioned within the sinistral steering knuckle such that the sinistral steering knuckle is free to swivel about the swivel axis;
• (iv) a sinistral kingpin bracket bracketing the sinistral kingpin;
• (v) a sinistral steering linkage having an inboard end and an outboard end, the outboard end fastened to the sinistral steering arm in a configuration to control the degree of swivel of the sinistral steering knuckle about the swivel axis, the inboard end fastened to the upright member at a first sinistral attachment point;
• and
• (vi) a sinistral support member supportingly fastened to the sinistral kingpin bracket;
• (d) wherein the dextral wheel has an axis of rotation, a toe angle, and a camber angle;
• wherein the dextral kingpin has a caster angle and a KPI
• (e) wherein the sinistral wheel has an axis of rotation, a toe angle, and a camber angle;
• wherein the sinistral kingpin has a caster angle and a KPI;
• and
• (f) wherein the steering mechanism is configured such that the caster angle of the dextral kingpin may be adjusted by rotating the dextral kingpin bracket, and the caster angle of the sinistral kingpin may be adjusted by rotating the sinistral kingpin bracket.