Abstract: A puncture resistant wheel apparatus, and method of use, for safely climbing obstacles are disclosed herein. A plurality of wheel apparatuses is mounted on a vehicle (e.g. a wheelchair, cart, mountain bicycle, etc.) to enable it to safely traverse obstacles, such as a flight of stairs, road curbs, etc. without slipping, and while creating a smoother ride. Each wheel apparatus comprises: a tire comprising a plurality of teeth sections separated via a thin space to grip an obstacle edge between the teeth; a circular rim attachable to the tire inner surface via T-joints, and a plurality of evenly spaced spokes extending to a central hub; and two hoop rings, mounted on opposing tire sidewalls. The center of each tire tooth section further comprises an elastic unit, comprising a vertical spring and two horizontal springs that further act to dampen the vibrational and jarring forces exerted on the wheel apparatus.

Abstract: A puncture resistant wheel apparatus, and method of use, for safely climbing obstacles are disclosed herein. A plurality of wheel apparatuses is mounted on a vehicle (e.g. a wheelchair, cart, mountain bicycle, etc.) to enable it to safely traverse obstacles, such as a flight of stairs, road curbs, etc. without slipping, and while creating a smoother ride. Each wheel apparatus comprises: a tire comprising a plurality of teeth sections separated via a thin space to grip an obstacle edge between the teeth; a circular rim attachable to the tire inner surface via T-joints, and a plurality of evenly spaced spokes extending to a central hub; and two hoop rings, mounted on opposing tire sidewalls. The center of each tire tooth section further comprises an elastic unit, comprising a vertical spring and two horizontal springs that further act to dampen the vibrational and jarring forces exerted on the wheel apparatus.

Abstract: The present invention relates to a curb climbing system for a wheelchair having a pair of rear larger drive wheels, a pair of small caster wheels, and a static hand grip for a caregiver being located at a back region behind an occupant seat; the system comprises: (1) a rear rollover-climb lever mechanically linked to a pivot to permit the caregiver located at the back-end region of the wheelchair to apply a downwards forceful thrust sufficient to shift the lever from an upward-position to a downward-position; and (2) a mechanical torque engagement system to translate the downwards forceful thrust to a rollover rotation torque around a pivot point on a stair-like curb, to climb over the stair-like curb. During climb procedure, a ratchet system provides unidirectional backwards rotation of the rear wheel pair and prevents forward rotation to block the wheelchair from rolling down the stairs for safety.

Abstract: The present invention relates to a curb climbing system for a wheelchair having a pair of rear larger drive wheels, a pair of small caster wheels, and a static hand grip for a caregiver being located at a back region behind an occupant seat; the system comprises: (1) a rear rollover-climb lever mechanically linked to a pivot to permit the caregiver located at the back-end region of the wheelchair to apply a downwards forceful thrust sufficient to shift the lever from an upward-position to a downward-position; and (2) a mechanical torque engagement system to translate the downwards forceful thrust to a rollover rotation torque around a pivot point on a stair-like curb, to climb over the stair-like curb. During climb procedure, a ratchet system provides unidirectional backwards rotation of the rear wheel pair and prevents forward rotation to block the wheelchair from rolling down the stairs for safety.