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US 12,600,429 B2Granted
Universal rotation front steering for a riding device
AssigneeRc Innovation, LLC
InventorRasyad Chung
Life of this patent
Estimating the term…
Abstract
Riding devices such as bicycles, scooters, and personal mobility devices include four rigid bodies, three revolute joints, and further include a front hanger and wheels that universally rotate around a front hanger pivot axis, a front truck assembly with twist steering, and a rear truck assembly with lean steering, where the twist steering is independent of the lean steering, and where a deck rotates about a longitudinal roll axis between a front virtual pivot point in the front hanger and a rear virtual point in the rear hanger.
Claims18
A riding device for riding on a riding surface, comprising:
- a first rigid body comprising a deck, a neck, a headtube, and a rear truck base block with a rear pivot axis;
- a second rigid body comprising a handlebar, a riser, a fork steer tube, a front fork with a front hanger pivot axis, and a front virtual pivot point;
- a third rigid body comprising a front hanger assembly comprising a front hanger and at least one axle, wherein the axle connects with two laterally spaced front wheels;
- a fourth rigid body comprising a rear hanger assembly comprising a rear hanger, at least one rear hanger pivot bolt, a rear virtual pivot point, and at least one axle, wherein the axle connects with two laterally spaced rear wheels;
- a rear truck assembly comprising the rear truck base block, an elastomeric component, the fourth rigid body, and a third revolute joint;
- a first revolute joint connecting the first rigid body with the second rigid body, wherein the first revolute joint revolves around a front twist steering axis for a twist steering motion of the front wheels;
- a second revolute joint with universal rotation connecting the second rigid body with the third rigid body, wherein the third rigid body and the connected front wheels universally rotate around the front hanger pivot axis;
- the third revolute joint connecting the first rigid body with the fourth rigid body, wherein the third revolute joint comprises a constrained first rear spherical joint and a constrained second rear spherical joint, wherein the first spherical joint and the second spherical joints rotate in constrained unison about a rear hanger pivot axis for a lean steering motion of the rear wheels, and wherein the twist steering motion of the front wheels is independent of the lean steering motion of the rear wheels;
- and
- a longitudinal roll axis along a virtual line between the front virtual pivot point and the rear virtual pivot point, wherein the first rigid body rotates about the longitudinal roll axis.
7 more elements
A riding device for riding on a riding surface comprising:
- a first rigid body comprising a deck, a neck, a headtube, and a rear truck base block with a rear pivot axis;
- a second rigid body comprising a handlebar, an integrated riser and fork connected with a steer tube base, and a cantilevered axle that is coincident with a front hanger pivot axis, wherein the steer tube base projects rearward and is connected a steer tube with a rearward offset from the integrated riser and fork, and the cantilevered axle projects rearward from the integrated riser and fork and underneath the steer tube base;
- a third rigid body comprising a front hanger assembly comprising a hanger and at least one axle, wherein the axle connects with two laterally spaced front wheels;
- a fourth rigid body comprising a rear hanger assembly comprising a hanger, at least one rear hanger pivot bolt, and at least one axle, wherein the axle connects with two laterally spaced rear wheels;
- a rear truck assembly comprising the rear truck base block, an elastomeric component, the fourth rigid body, and a third revolute joint;
- a first revolute joint connecting the first rigid body with the second rigid body, wherein the first revolute joint revolves around a front twist steering axis for a twist steering motion of the front wheels;
- a second revolute joint with universal rotation connecting the second rigid body with the third rigid body, wherein the third rigid body and the connected front wheels universally rotate around the front hanger pivot axis;
- the third revolute joint connecting the first rigid body with the fourth rigid body, wherein the third revolute joint comprises a constrained first rear spherical joint and a constrained second rear spherical joint, wherein the first spherical joint and the second spherical joints rotate in constrained unison about a rear hanger pivot axis producing a lean steering motion of the rear wheels, and wherein the twist steering motion of the front wheels is independent of the lean steering motion of the rear wheels;
- and
- a longitudinal roll axis along a virtual line between a front virtual pivot point and a rear virtual pivot point, wherein the first rigid body rotates about the longitudinal roll axis.
7 more elements
Dependencies are inferred from the claim text.