Embodiments of the present disclosure provide a collapsible wheelchair, including: a movable chassis; a chair; a chair backrest; at least one first folding mechanism, installed between the movable chassis and the chair; and at least one second folding mechanism, connected between the chair and the chair backrest; where, the at least one first folding mechanism and the at least one second folding mechanism are connected in series and both have a four-rod linkage structure, and when the collapsible wheelchair is switched from a folded state to an open state or from the open state to the folded state, the at least one first folding mechanism and the at least one second folding mechanism are configured to move simultaneously. The collapsible wheelchair provided by the present disclosure is convenient in terms of the operation and easy to operate.

An electrical power assistance device designed to be removably coupled to existing transport wheelchairs to provide electric power to aid in transportation of a person sitting in the wheelchair, while being detachable to allow the transport chair to fold up for easy storage in a car or other vehicle. The electrical power assistance device includes a motor powered by a rechargeable battery, where the motor drives an internal shaft which rotates a pair of friction wheels. A clutch, provided on a separate axle coupled to the friction wheels by eccentric disks, allows the friction wheels to engage or disengage with the rear wheels of the transport wheelchair.

Apparatus and associated methods relate to a wheelchair power assist device configured to be installed, uninstalled and exchanged using an exchange tab welded to a wheelchair, and when installed to switch a motorized friction roller between engaged and disengaged modes with a wheelchair wheel, based on an engagement actuator configured to move the friction roller relative to the wheelchair. The friction roller may be operably coupled with an engagement member configured to move relative to the wheelchair. The engagement member may be moved by an extendable and retractable actuator shaft coupled with the wheelchair. A manual wheelchair may be converted to a powered wheelchair using a motorized friction roller for each wheelchair wheel while leaving an open space behind the wheelchair seating area, advantageously permitting the power assist devices to remain attached to a foldable wheelchair in either folded or unfolded configurations.

A convertible wheelchair is provided. The convertible wheelchair can have a wheelchair configuration and a walker configuration to allow a user to alternately sit and stand, and can include a frame supporting a chair. The chair can be foldable and can include a chair back and a chair seat. The convertible wheelchair can include support and stability mechanisms accessible in the wheelchair configuration and the walker configuration including one or more torso supports, a fall seat, and stability bars.

A convertible wheelchair is provided. The convertible wheelchair can have a wheelchair configuration and a walker configuration to allow a user to alternately sit and stand, and can include a frame supporting a chair. The chair can be foldable and can include a chair back and a chair seat. The convertible wheelchair can include support and stability mechanisms accessible in the wheelchair configuration and the walker configuration including one or more torso supports, a fall seat, and stability bars.

A leg assembly configured to be used with a wheelchair that may be constructed of various mechanical and manual powered components to reduce the cost and unreliability of motor, electric, or otherwise non-manual powered adjustable wheelchairs. A combination wheelchair and leg assembly that may be constructed of various mechanical and manual powered components. The leg assembly disclosed may alternatively be motor powered.

A leg assembly configured to be used with a wheelchair that may be constructed of various mechanical and manual powered components to reduce the cost and unreliability of motor, electric, or otherwise non-manual powered adjustable wheelchairs. A combination wheelchair and leg assembly that may be constructed of various mechanical and manual powered components. The leg assembly disclosed may alternatively be motor powered.

Apparatus and associated methods relate to a wheelchair power assist device configured to be installed, uninstalled and exchanged using an exchange tab welded to a wheelchair, and when installed to switch a motorized friction roller between engaged and disengaged modes with a wheelchair wheel, based on an engagement actuator configured to move the friction roller relative to the wheelchair. The friction roller may be operably coupled with an engagement member configured to move relative to the wheelchair. The engagement member may be moved by an extendable and retractable actuator shaft coupled with the wheelchair. A manual wheelchair may be converted to a powered wheelchair using a motorized friction roller for each wheelchair wheel while leaving an open space behind the wheelchair seating area, advantageously permitting the power assist devices to remain attached to a foldable wheelchair in either folded or unfolded configurations.

A carrier element is configured to securely store a foldable wheelchair that is mountable in an ambulette or other vehicle without interfering with passenger space in the vehicle.

The present invention provides an assembly having a collapsible wheelchair and an anti-rollback assembly to brake rotational movement of the wheelchair when a user is unseated, while simultaneously maintaining the ability of the wheelchair to collapse into a storage configuration. The anti-rollback assembly may include a brake bar pivotable between a lock state and an unlock state, a biasing member engaging the brake bar to exert a biasing force to move the brake bar into the lock state, and an actuator configured to engage a seat surface of the wheelchair to move the brake bar into the unlock state when the individual occupies the seat surface.