A shock-absorbent structure of an electric carrier is assembled with a steering system. The steering system includes a steering axis and two wheels linked with the steering axis. The shock-absorbent structure of an electric carrier includes a steering assembly and a wheel axle assembly. The steering assembly includes a bushing, a steering connecting portion connected to the bushing, and an accommodating space. The wheel axle assembly includes a body, two axle connecting members respectively disposed at two ends of the body, a body opening penetrating the body, an elastic body disposed between the body and the bushing, and a pressing member passing the body opening. The pressing member abuts at one end of the body corresponding to the bushing when the elastic body is in a diastolic state, and moves away from the bushing when the elastic body is in a compressed state.

This patent pertains to patient contact compensating wheelchairs. One implementation includes a motorized base that includes a battery and a seat positioned above the base. In one instance, the seat can include a moisture permeable structure configured to support a patient and a fan configured to move air below the moisture permeable structure to carry moisture from the patient away from the moisture permeable structure. Another implementation includes a set of patient contact objects configured to alternatively contact first and then second portions of an underside of the moisture permeable structure so that at a first time more of the patient's weight is supported at the first portion than at the second portion and at a second time more of the patient's weight is supported at the second portion than at the first portion, to relieve contact pressure of the patient.

A shock-absorbent structure of an electric carrier is assembled with a steering system. The steering system includes a steering axis and two wheels linked with the steering axis. The shock-absorbent structure of an electric carrier includes a steering assembly and a wheel axle assembly. The steering assembly includes a bushing, a steering connecting portion connected to the bushing, and an accommodating space. The wheel axle assembly includes a body, two axle connecting members respectively disposed at two ends of the body, a body opening penetrating the body, an elastic body disposed between the body and the bushing, and a pressing member passing the body opening. The pressing member abuts at one end of the body corresponding to the bushing when the elastic body is in a diastolic state, and moves away from the bushing when the elastic body is in a compressed state.

A seat base assembly for a wheelchair includes a dock configured to be mounted to a vehicle frame. An attenuating mechanism is operatively connected to the dock to absorb impact between the vehicle frame and a wheelchair. An interface assembly is operatively connected to the attenuating mechanism to connect a wheelchair to the attenuating mechanism. A crashworthy wheelchair includes a seat having arm rests and a seat back extending therefrom. Front wheels and back wheels are operatively connected to the seat. Each arm rest includes a downward opening slot configured to accommodate a respective one of the back wheels during a negative G event. The wheelchair can include a hook extending down ward from the seat to engage with a respective mating portion of the seat base assembly.

An embodiment seating device includes a frame unit including a chair region capable of supporting a user and a leg region extending downward from the chair region, a backrest unit disposed at a rear side of the frame unit, and a handle unit coupled to a first side of the frame unit, the handle unit including a fixing handle body region having a first side coupled to the frame unit and rotatable relative to the frame unit and a lifting handle body region having a first side coupled to the fixing handle body region and rectilinearly movable relative to the fixing handle body region.

Wheel with an in-wheel suspension system, and suspension member thereof. Wheel includes: stationary member including an axis, rotary member rotatable about the axis, and selective suspension system. The selective suspension system has at least one suspension member positioned between the stationary member and the rotary member, thereby providing a fixed distance therebetween, and retains the fixed distance when stressed up to a threshold value, and recoverably alters the fixed distance when stressed over the threshold value. The suspension member includes: cylindrical housing, piston slidably movable in the cylindrical housing, and compression spring whose first end is connected to the piston and second end is connected to the housing. The compression spring, when fully relaxed or compressed under the threshold value, maintains the housing and piston at a normally fixed distance. Applicable to wheelchairs and bicycles, among other self-propelled and powered vehicles.

A raising wheelchair comprises a wheeled frame and a raising system mounted to the frame and supporting a seat and a backrest. The raising system is configured to be movable between a lowered position and a raised position. The raising system includes at least one double-armed lever including a first lever member and a second lever member, a coupling member fixedly mounted to the frame, wherein the first lever member and the second lever member are pivotally coupled to the coupling member, and a coupling mechanism translationally coupled or pivotally coupled to a second end of the first lever member, pivotally coupled to a second end of the second lever member, and coupled to the backrest. The raising system maintains an orientation of the backrest relative to the ground that is substantially constant throughout substantially an entire range of movement between the lowered position and the raised position.

A wheel connectable to a vehicle. The wheel includes a stationary member having an axis, a rotary member rotatable about the axis, and at least one support member positioned between the stationary member and the rotary member, thereby providing a normally fixed distance therebetween. The support member is adapted to retain the distance when stressed up to a threshold value and to recoverably alter the distance when stressed over the threshold value.

A wheelchair including a base assembly that has a first side and a second side. At least one caster and a drive wheel are mounted to each of the first and second sides. The wheelchair includes a seat assembly having a seat and a backrest and an actuator assembly having a plurality of actuators. Each actuator can expand and retract and includes a first end pivotably connected to the base assembly and a second end pivotably connected to the seat assembly. The actuator assembly allows for at least four degrees of movement of the seat assembly with respect to the base assembly. The wheelchair includes a computer that is connected to the actuators and that controls the movement of the actuators. The computer moves the actuators to vary the position of the seat assembly with respect to the base assembly.

A medical rehabilitation chair includes a main frame, multiple castor devices mounted on the bottom of the main frame, and two armrest boards mounted on two sides of the main frame. A telescopic damping driver, a seat frame assembly, a backrest frame assembly, a leg support assembly, a lifting mechanism, and a foot support assembly are assembled on the main frame. The seat frame assembly has a front section connecting the leg support assembly and a rear section connecting the backrest frame assembly. The telescopic damping driver drives the backrest frame assembly, the seat frame assembly, and the leg support assembly, to produce different swinging angles. The lifting mechanism drives the seat frame assembly to lift or lower. The foot support assembly is movable in a horizontal direction to protrude from the front section of the main frame.