A medical chair includes a base, a seat, and a leg rest pivotally mounted relative to the seat and adapted to move between an extended position and a retracted position. The chair further includes a first actuator for tilting the seat with respect to the base, a second actuator for lifting the seat with respect to the base, and a leg rest actuator adapted to move the leg rest. The chair also includes a controller adapted to control the first and second actuators to move the seat between a first position and a second position such that the seat is both lifted and tilted at the same time as the seat moves from the first position to the second position, and wherein the controller is adapted to control the leg rest actuator such that the leg rest maintains a substantially constant orientation with respect to the floor.

Modular chair systems and methods of transporting a subject using a modular chair system are described. A modular chair system includes a seat component, a chair component, and a wheelchair component. The seat component includes a seat having a planar lower surface with one or more recesses and one or more attachment bars disposed in each of the recesses. The chair component includes one or more chair latch mechanisms and the wheelchair component includes one or more wheelchair latch mechanisms. Each attachment bar corresponds to one of the chair latch mechanisms and one of the wheelchair latch mechanisms such that the seat component is configured to be placed upon the chair component or the wheelchair component and releasably held in place by the chair latch mechanisms or the wheelchair latch mechanisms.

A wheelchair comprising a seat back, a seat bottom, a frame, two front wheel assemblies, two drive wheels, two wheelchair wheels, and an anti-rollback wheelchair braking system consisting of two braking units, each unit comprising a housing cylinder body cap, a housing cylinder body, a housing cylinder mounting assembly, a wheelchair mounting assembly, rotatable toggle clamp direction selection lever, an anti-rollback, one-way, brake assembly, and a toggle clamp assembly for engaging the said anti-rollback, one-way, brake assembly with a wheelchair wheel. A parking brake assembly may also be included. The invention may be manufactured and sold as a whole wheelchair assembly or a retrofit kit for standard wheelchairs.

A personal mobility device includes a control system including a manually operated actuator, a first forward control valve having an inlet in fluid connection with a source of pressurized gas and an outlet in fluid connection with a first forward port of at least a first pneumatic motor, and a first rearward control valve having an inlet in fluid connection with the source of pressurized gas and an outlet in fluid connection with a first rearward port of the first pneumatic motor. Movement of the manually operated actuator controls actuation of the first forward control valve and the first rearward control valve and thereby flow of gas from the source of pressurized gas to the first forward port and the first rearward port.

A reciprocating drive motion wheelchair is provided. The wheelchair device includes a low-profile wheelchair that utilizes push bars pivotally connected to the wheelchair frame and operably connected to a crank bar, which run parallel to the ground and connects back to a crank on each wheel. An additional pair of wheels is disposed rearward of the drive wheels and prevents the wheelchair from tipping, thus allowing the user to utilize the push bars to move the wheelchair quickly and easily.

The present invention relates to a fall prevention safety wheelchair brake device, and more particularly, in a wheelchair having a safety bar for preventing a safety accident due to a fall while moving the wheelchair, to a fall prevention safety wheelchair brake device in which a brake is locked when the safety bar is not fastened, and the brake is switched from a locked state to an unlocked state when the safety bar is fastened.

The present invention comprises of a lever drivetrain device for control of a vehicle generally including at least one lever shaft with a repositionable scrub brake to inhibit motion of the wheel. The lever shaft is demountably coupled to a receiver via a socket secured to a gear of a gear assembly. The lever permits a multitude of hand positions to vary effort. The scrub brake is demountably coupled to the lever shaft and can be located at a multitude of positions to vary braking load and lever engagement position. In some embodiments, the scrub brake is comprised of material of high coefficient of friction and optimized geometry for braking performance and service.

A mobile device includes a body, a motor, a transmission assembly and two driven components. The motor and the transmission assembly are disposed at the body. The transmission assembly includes a differential, two shafts and two stoppers. The differential is coupled to the motor. The two shafts are respectively coupled to the two opposite sides of the differential. The two stoppers are respectively disposed corresponding to the two shafts. The two driven components are respectively connected to the two shafts. When one of the two shafts is locked by the corresponding stopper, the motor may still drive the other shaft and the driven component connected thereto to rotate relative to the body through the differential. A transmission assembly is also provided.

A wheelchair brake system comprises: a brake which is provided in a wheel of a wheelchair; and a brake actuation controller which connects with the brake and locks and releases the brake, wherein the brake is usually in a lock mode, but the brake actuation controller controls the brake to be switched over from the lock mode to a release mode if sensing that a user sits down on the wheelchair or the wheelchair is folded up.

Wheelchair (10) with two independent driving arms (21, 21), comprising a seat (16), two rear large wheels (12, 13) and two front small wheels (14), wherein the small wheels (14) can be freely turned around a vertical axis, and a common frame (11) for holding the listed parts, and the two driving arms (21, 21) are fixed to the frame (11) by means of respective pivot bearings (25) which are fixed at a low position close to the place where the small wheels (14) are attached to the frame (11), and the driving arms (21, 21) extend till a height which is sufficiently high for the person sitting in the wheelchair (10) to hold their upper end portions easily with hands and to move them in forward-backward directions around the respective pivotal bearings, and both of the large wheels (12, 13) are equipped with respective brakes that can be operated by the driving arms (21, 21) or by respective brake handles (42) positioned on the driving arms (21, 21), and to respective lower sections of the driving arms (21, 21) respective ropes (32, 32) are connected, and the two large wheels (12, 13) comprise respective wheel hubs (30, 30) each equipped with freewheel, and to one side of each wheel hub (30, 30) a respective one of rope drums (31, 31) is attached, the rope drums (31, 31) are each provided with a spring bias, and a winding made of said rope (32, 32) comprising a predetermined number of turns is provided on the mantle of each rope drum (31, 31), wherein a predetermined displacement length of the pulling of the rope (32, 32) in forward direction results in a given turning of the associated wheel hub (30, 30) in forward direction, and when the rope drum (31, 31) is turned in the other direction the freewheel releases the connection towards the large wheel (12 or 13), and the wheel hub (30, 30) comprises a release mechanism that releases the locking of the freewheel when the large wheel (12 or 13) is moved in backward direction and backward movement gets allowed.