120 results about "Wheelchair Wheels" patented technology

A system for providing an automated axial force to a continuously variable transmission (CVT) in a wheelchair. An electronic transmission control receives one or more input signals generated by throttle position or other variables. The microprocessor generates an output signal that adjusts the axial force applied to a CVT thereby automatically adjusting the input to output ratio. The invention also provides a manually-controlled variator is designed for use on a wheelchair. The manual shifter hydraulically adjusts an axial force imparted on a variator in communication with a wheelchair wheel and a hand rim. Application of the axial force causes the hand rim input and wheelchair wheel output ratio to change, permitting a wheelchair operator to manually adjust the input to output ratio to more easily operate the wheelchair.

A treadmill includes a braking device incorporated in the body of the treadmill and operated for applying a resistance or load against the rotary motion of treadmill rollers on which a wheelchair's side wheels are supported. The angle of inclination of the treadmill rollers may be adjusted according to any variation in the angle of inclination for the wheelchair wheels supported by the treadmill rollers. To this end, the user of the wheelchair can adjust the angle of inclination for the treadmill rollers. A guide member for supporting the front wheel of the wheelchair may also be included, and the guide member can be adjusted to accommodate practically all types and sizes of the wheelchair. A central control panel is provided at a particular single point on the treadmill for enabling the user of the wheelchair to control the braking device, adjust the angle of inclination, and moving the guide member.

A propulsion and exercise device for attaching to a conventional wheelchair having: at least one drive wheel operably interposed between the rear set of wheelchair wheels. A telescoping mast may connect the drive wheel axle to pedals to permit the pedals to be selectively moved from a stowed position to an extended position for use. Power is transmitted from the pedals to the drive wheel through a chain drive that passes over idler sprockets that maintain the chain length during adjustment of the telescoping mast.

An automated wheelchair for moving over a contact surface. The automated wheelchair includes an operator chair for seating the wheelchair operator, a control computer, an operator input device for transmitting operator inputs to the control computer, and two wheelchair wheels for propelling the wheelchair. Each wheelchair wheel includes extendable and retractable spokes. The extension and retraction of each spoke is controlled by a motor. At the ends of each spoke are contact sensor devices. The control computer is programmed to receive inputs transmitted from the contact sensor devices to record contact position data. The control computer generates and sends control signals to each spoke motor in response to the operator inputs and in response to the contact position data generated by the contact sensor devices.

An automated wheelchair for moving over a contact surface. The automated wheelchair includes an operator chair for seating the wheelchair operator, a control computer, an operator input device for transmitting operator inputs to the control computer, and two wheelchair wheels for propelling the wheelchair. Each wheelchair wheel includes extendable and retractable spokes. The extension and retraction of each spoke is controlled by a motor. At the ends of each spoke are contact sensor devices. The control computer is programmed to receive inputs transmitted from the contact sensor devices to generate a terrain profile. The control computer generates and sends control signals to each spoke motor in response to the operator inputs and in response to the terrain profile generated by the contact sensor devices. In a preferred embodiment the contact sensor devices are pressure sensor devices. Also in a preferred embodiment, rotatable pneumatic wheels are attached to both ends of each spoke. Preferably, a brake is applied to at least one pneumatic wheel per wheelchair wheel while the wheelchair is moving over the contact surface. Preferably, the automated wheelchair is capable of moving over a variety of contact surface types, including: a set of stairs with uniform rise to run ratio, a set of stairs with non-uniform rise to run ratio, a set of straight stairs, a set of curved stairs, over a curb or over rough terrain.

A propulsion unit for a wheelchair wheel with a track. The propulsion unit comprising a body having a front portion, a rear portion and a handle, at least three rollers pivotally mounted to the body, front and rear friction elements positioned in the front and rear portions of the body respectively. When the handle is pressed forward the wheel is propelled forward and when the handle is pressed rearward the wheel is propelled rearward.

A shock absorbing suspension for the large rear wheels of a wheelchair is disclosed. A fork element is hinged at one end to a clamping member which attaches to a horizontal frame member of the wheelchair. A cylindrical solid polymer shock absorber cushions the movement of the fork element toward the clamping member. The free end of the fork element includes an axleway for the axle of a large wheelchair wheel. The movement of the fork element relative to the clamping member is limited by abutting surfaces on the fork element and the clamping member.

Disk brakes are located to the interior of the outermost extent of the space frame of the wheelchair, and are within the volume of this space frame, being most commonly under the seat of the occupant of the wheelchair. In this location the disk brakes are subject to unobstructed operation, and will in particular not be subject to detrimentally contacting the garments or covers of an occupant of the wheelchair. The disk brakes are preferably hydraulically actuated, and stabilized by a strut connecting two bearing blocks through each of which passes an associated axle shaft connecting to the hub of an associated wheelchair wheel at an outboard location, and also to a an associated disk brake rotor at an inboard location.

The invention relates to a backrest and footrest swingable electric dual-mode stair-climbing wheelchair provided with a wheelchair frame. Universal caster mounting holes and footrest mounting columns are arranged at the two bottom corners of the front of the wheelchair frame respectively, two universal casters are mounted in the universal caster mounting holes respectively, a footrest is mounted on each footrest mounting column, two wheelchair wheels driven by motors are mounted on two sides of the rear portion of the wheelchair frame respectively, mounting shaft holes of a crawler-type stair climbing device are arranged in the rear of the wheelchair frame, and connection of armrests on two sides of the upper portion of the wheelchair frame and the wheelchair frame is set in a pluggable type; connection between a backrest of the wheelchair frame and the wheelchair frame is set in a backrest front-back swingable mode. An electric or manual push-pull rod is arranged between the backrest and the wheelchair frame. An LED illuminating lamp is arranged each armrest. The wheelchair is applicable to the aged and the disabled unable to move freely, and has the advantages of scientific and reasonable structural design, stable operation, easiness in operation and security and reliability.

A wheelchair propulsion system provides a wheelchair user with a continuous input drive path of linear or elliptical shape. The propulsion system includes a Cardan gear system defining a linear reciprocating or elliptical input path over which propulsive force may be continuously applied to the wheelchair wheels. Because the input path is continuous, efficiency is increased and impact on the user's body is reduced thereby reducing discomfort and physical demands on the user's body. The angle of the input path may be altered to suit the particular needs of a user by rearrangement of the relative angular orientations of the gears in the propulsive system. The present propulsive mechanism may be integrated into a wheelchair or retrofitted to existing wheelchairs.

A wheel mount may generally be comprised of an axle plate and a camber tube clamp that may be height adjustable with respect to the axle plate. The camber tube clamp can be selectively mountable upright or inverted so as to increase an overall range of height adjustability. The camber tube clamp can be mountable in front of or behind the axle plate so as to increase an overall range of center-of-gravity adjustability. The camber tube clamp and the axle plate may have an interlocking feature that may allow the camber tube clamp to slide vertically along the axle plate to facilitate height adjustment. A seat collar can be positioned at various locations along a wheelchair frame for center-of-gravity adjustment. The axle plate can be detached from and attached to the seat tube collar to allow the axle plate and camber tube clamp to be reverse mounted in order to increase the range of center of gravity adjustment. A wheelchair suspension system according to the invention may be comprised of a swing arm and at least one elastomer. The swing arm may be adapted to support a rear wheelchair wheel and pivot about an axis substantially fixed to a wheelchair frame. The swing arm can be suspended between two of the elastomers, or be operatively connected to one elastomer so that displacement of the swing arm in either direction about the pivot causes the elastomer to compress.

The present invention relates to an improved garment for keeping babies, children and adults warm when in a seated position and more particularly, though not necessarily, to an improved blanket for wearing when in a chair, buggy, wheelchair or the like. It is known to use a blanket to provide warmth to the legs of a wheelchair user. Typically, the blanket is placed upon the thighs; warmth my thereby be retained by the user, albeit be subjected to draughts. However such a blanket is often at least one of bulky, loose, ill fitting, and draughty. Also, it may be dangerous because it may slip off and get caught around the wheelchair wheels, and would be liable to cause an accident. Also, an ordinary blanket often does not provide adequate heat to the user's legs. While parts of the user's legs may be warm there are many gaps allowing any heat that had been retained to be lost. Also when the blanket falls off, all heat will be lost. The present invention seeks to provide, in a general sense, a garment that can securely, repeatedly and conveniently be attached to a seated person, whereby to assist in protecting the person from becoming too cold or too hot. The invention may also be used to protect the wearer in the event that there is some it is raining or from another form of precipitation. According to a first aspect of the present invention there is provided a garment for a seated person, the garment comprising: a first panel configured to fit over the lap of a user, a second panel configured to fit around the lower legs of the user; fastening means operable to enable the second panel to be retained around the legs of the user.

The cleaning apparatus is essentially an adjustable bar having an adapter on one end and a cleaner head on the opposing end. The adjustable bar includes a main cylinder head pivotably attached at a first pivot to the adapter, the main cylinder head having an opening configured to receive a main cylinder rod slideable within the main cylinder head's opening and can be locked in place using a lock to form a suitable length. The free end of the main cylinder rod is pivotably connected to a bracket at a second pivot. The cleaner head is in turn connected to the bracket at a third pivot. The cleaner head includes a cleaner housing configured to slidingly cooperate with a complementary cleaner housing such that the width of the cleaner head is adjustable to accommodate wheelchair tires of different sizes.

A wheelchair wheel positioning system for providing an unobstructed path into and out of a wheelchair. The wheelchair wheel positioning system includes a frame member fastened to a wheelchair frame, an actuation member pivotably connected to both a frame bar and a rear wheel of the wheelchair and a stabilizer member utilized for lifting and maintaining the wheelchair in place. The actuation member pivotally connects at one end to the frame member and pivotally connects near the middle to a rear wheel of the wheelchair. The stabilizer member is affixed near the middle of the actuation member at a preferred angle. As the actuation member and rear wheel are rotated rearward, the stabilizer member contacts the floor surface to lift the rear wheel that the wheelchair wheel positioning system is attached to and stabilizes the wheelchair for entry and exit.

The invention discloses a walking-aid wheelchair which comprises a wheelchair mechanism and a walking-aid mechanism, wherein the wheelchair mechanism is connected with one side of the walking-aid mechanism, and the other side of the walking-aid mechanism is fixed through a bolt; the wheelchair mechanism comprises a wheelchair body, wheelchair wheels, wheelchair armrests and wheelchair pushers; the wheelchair wheels are mounted at the lower part of the wheelchair body; the wheelchair armrests are mounted on two sides of the wheelchair body; the wheelchair pushers are mounted at the rear of the wheelchair body; the walking-aid mechanism comprises a walking-aid bracket, walking-aid wheels and supporting armrests; the walking-aid wheels are mounted at the lower part of the walking-aid bracket; the supporting armrests are mounted at the upper part of the walking-aid bracket. The walking-aid wheelchair realizes the dual-purpose and complementary functions of a wheelchair and a walking aid, reduces cost for a user, saves the accommodating space, is convenient to use, improves the safety performance of the wheelchair, is a convenient tool which has the dual purposes of standing and sitting, aids standing and walking, and can be ridden instead of walking, and fills the market vacancy.

A quick release detachable wheel hub assembly is shown for a lightweight manual wheelchair. The wheelchair wheels mount on exterior hubs and rotate therewith. The inner face out of each of the exterior hubs mates with an opposing outer face of interior hubs. One of the opposing faces on the hubs has a projection or a plurality of projections which fit snugly into corresponding openings on the opposing face of the other hub when the opposing faces of the hubs are mated. The interior hubs are mounted and rotate on detachable axles which screw into the wheelchair frame. A quick release, removable locking pin is inserted through the center of the hubs and into detachable axle and locked in place and thereby causing the hubs to be locked and rotate together. The wheels are quickly detached by simply removing the locking pins and pulling apart the hubs.

A highway motor vehicle is equipped to be driven by a handicapped person in a mobility chair. The preferred embodiment permits rear passenger seating commonly found in automobiles and includes a rear stowage compartment for purchased items. The vehicle has a powered hatch and ramp. This hatch and ramp permit a handicapped person to enter to the driving position in a wheelchair. Wheelchair wheel locks and seatbelts secure the wheelchair and handicapped person in place in the driver's position in the vehicle. The hatch is closable and the ramp withdrawable so that the vehicle is drivable on the highway. Collapsible and rotatable steering controls are either part of the front hatch or are rotatably mounted to the floor and moved into a position in front of the driver. Steering and other operational controls may be geared or electronic to suit the handicapped person's abilities.

An improved off-road wheelchair having detachable wheelchair wheels having disc brakes, an anti-wheelie wheel and at least one detachable stability wheel.

A cover suitable for use in conjunction with a wheelchair wheel. The cover includes a durable nylon fabric and includes a barrier and a cover portion, the barrier being interposed between an inner surface of the cover portion and the tread and sidewalls of the wheel so that foreign matter present on the wheel does not contaminate or otherwise harm any persons or surfaces with which the covered wheel may come into contact. The cover further includes an outer surface and first and second edges. A plurality of straps attached to the first edge of the cover, and configured to be removably attached to the second edge of the cover, permit the cover to be readily attached to, and detached from, the wheel. Finally, a plurality of lateral seams on the outer surface of the cover facilitate traction when the wheelchair passes over relatively smooth surfaces.

A wheelchair wheel locking assembly comprises a first wheel stop having an actuating lever for operating a first wheel-engaging member. The first wheel stop is operably connected to a second wheel stop via a continuously flexible linkage, whereby actuating the first wheel stop simultaneously operates the second wheel stop. In the event the continuously flexible linkage is severed, the first wheel stop may continue to be operated by the actuating lever. The wheel locking assembly of this invention is advantageously operated from a single side of a wheelchair. A wheel locking assembly having dual actuating levers is also provided, whereby from a single side of a wheelchair a first actuating lever operates a first wheel-engaging member and a second actuating lever operates a second wheel-engaging member.

The invention relates to a pressure ulcer prevention electric wheelchair. The pressure ulcer prevention electric wheelchair comprises a wheelchair frame, a vibration seat cushion, an air pump and a motor, wheelchair wheels are arranged at the two sides of the wheelchair frame, the vibration seat cushion is installed in the middle of the wheelchair frame, armrests are arranged at the two sides of the vibration seat cushion, one armrest is provided with control switches, a wheelchair back is arranged in the vertical surface of the wheelchair frame, the air pump is installed on the wheelchair back, the motor is installed below the vibration seat cushion, an output shaft of the motor is connected with the wheelchair wheels, the control switches are connected with the air pump and the motor respectively through a wire, and the air pump is connected with the vibration seat cushion through an air pipe. According to the pressure ulcer prevention electric wheelchair, a patient can control the electric wheelchair to walk through the control switches arranged on one armrest, compression air is introduced into the seat cushion through the air pump switch control arranged on the armrest, and is firstly intermittently delivered into an air flow chamber through an air supply packing auger, then gas is made to enter a vibration chamber by being shunted through the blocking plate, the vibration motor is driven to knock at the surface of a seat cushion bag in the irregular motion direction to massage the hip of the patient, and the patient is effectively prevented from having pressure ulcer.

The invention aims to provide a wheelchair capable of climbing stairs and applicable to disabled students and solves the technical problem that students with leg disability cannot climb the stairs when using a wheelchair. The wheelchair comprises a wheelchair body, a moving groove mechanism, a wheelchair wheel lifting hydraulic mechanism, a first lifting hydraulic mechanism, a second lifting hydraulic mechanism, a third lifting hydraulic mechanism, an advancing hydraulic mechanism, a following hydraulic mechanism, a hydraulic station and a control system and further comprises a bottoming detection antiskid device. The wheelchair has the beneficial effects as follows: through coordinative cooperation of all mechanisms, the wheelchair can climb the stairs automatically, and the technical problem that the students with leg disability cannot climb the stairs is solved.

The invention discloses a walking aid wheelchair buffering and damping mechanism which comprises a bottom plate. Side plates are arranged on the front side and the rear side of the upper surface of the bottom plate, a back plate is arranged on the left side of the upper surface of the bottom plate, a back cushion is arranged on the right side of the back plate, the right side of the bottom plate is connected with the top end of a connecting rod, the bottom end of the connecting rod is connected with a pedal, the left side of the bottom of the bottom plate is connected with the top end of a second damper, the bottom end of the second damper is connected with a fixed plate, a second damping spring is arranged on the outer side of a second damper, a rotating shaft is arranged on the bottom surface of the fixed plate, and a rear wheel is arranged on the rotating shaft and rotatably connected with the rotating shaft. The mechanism is simple in structure, reasonable in design, a buffering and damping device is arranged between a wheelchair wheel and a frame, so that vibration from the ground can be effectively relieved, vibration energy can be timely absorbed and relieved when a wheelchair drives on a rough or bumpy road, bumping and shaking amplitudes of the wheelchair in driving are effectively reduced, and the mechanism has the advantages of safety and comfort in use.

A system for providing a wheelchair user access to forward, neutral and reverse movement while maintaining a continuous grip, silent operation, and allowing for small rotational movements of the wheelchair wheel to be easily made. The system includes a one-way bearing which is attached to a wheelchair wheel such that the center of the one-way bearing is coaxial with the wheelchair wheel axle, a drive axle mounted through the center of said one-way bearing, and a drive rod.

The invention discloses an electric folding wheelchair capable of going upstairs and downstairs. A wheelchair seat assembly is arranged at the upper part of a wheelchair underframe assembly in a liftable mode through a wheelchair seat ascending and descending assembly, and a wheelchair wheel assembly and a wheelchair upstairs and downstairs going assembly are arranged on the wheelchair underframeassembly, wherein the wheelchair seat assembly consists of foldable armrests, a foldable backrest and a translational wheelchair seat plate which are connected with each other; the wheelchair seat ascending and descending assembly is of a shear fork mechanical structure; the upper end of the shear fork mechanical structure cooperates with the bottom of the wheelchair seat assembly; the lower end of the shear fork mechanical structure cooperates with the wheelchair underframe assembly; the wheelchair wheel assembly consists of a front wheel driving motor, a rear wheel driving motor, wheelchairfront wheels driving by the front wheel driving motor and wheelchair rear wheels driven by the rear wheel driving motor; and the wheelchair upstairs and downstairs going assembly consists of front auxiliary wheels, rear auxiliary wheels, a big motor and a power transmission mechanism of the big motor. The electric folding wheelchair provided by the invention can be folded; the space is saved; in addition, the seat can freely translate, ascend and descend; the function of going upstairs and downstairs is achieved; and safety and reliability are realized.

The invention discloses an automatic cleaning device for wheelchair wheels. The device comprises an upward moving bevel, and a cleaning platform which is connected with the upward moving bevel, wherein wheels can enter and leave the cleaning platform through the upward moving bevel; a first rotating rod and a second rotating rod are arranged in parallel on the cleaning platform and are in the direction vertical to the rotating directions of the wheels; a cleaning groove is formed between two ends of the first rotating rod and the second rotating rod; a driving mechanism for driving the first rotating rod and the second rotating rod to rotate is arranged on the cleaning platform. The device consists of the upward moving bevel and the cleaning platform, and is simple and compact in structure, and convenient to operate; the first rotating rod and the second rotating rod can drive the wheelchair wheels to rotate in 360 degrees, and the cleaning groove is matched, so as to comprehensively and effectively clean the wheels; in addition, the safety is high. The automatic cleaning device needs a small space, is applicable to various sites, and is high in practicability and worthy of popularization in the industry.

The present invention relates to a manual wheelchair wheel, and in particular, to a manual wheelchair wheel with a built-in geared hub through which the speed of a forward or reverse driving force is shifted and said driving force is transferred, and which has an anti-reverse function, wherein the wheel is light and can easily replace existing wheelchair wheels. The wheel comprises: a central shaft having an axial direction hole and a radial direction through-hole and installed so as to not rotate with respect to the frame of the wheelchair; an input member supported on the central shaft and coupled to and rotated together with a handrim; an output member supported on the central shaft and coupled to and rotatable together with the wheel; a planetary gear column including a plurality of planetary gears installed on either the input member or output member, at least one sun gear engaged with a planetary gear, and a ring gear installed on the other one of the input member and output is member and engaged with a planetary gear; at least one shifting clutch enabling or preventing the rotation of the sun gear; a lock-up clutch enabling the input member and the output member to be coupled together and rotate in concert or be disengaged and rotate freely with respect to one another; and a shifting cam rotatably installed in the axial direction hole of the central shaft in order to control the operation of the shifting clutch and the lock-up clutch, wherein a different clutch operates according to the rotating direction / position of the shifting cam to shift between two or more gears and transfer forward and reverse driving force from the handrim to the wheel.

A push rim assembly for use with a wheelchair that prevents or minimizes direct contact of a user's upper extremity (arm, wrist, hand, fingers) with at least a portion of the wheelchair tire or wheelchair push rim.

A wheel immobilizer for substantially preventing rotation of a wheelchair wheel or tire about a central axis thereof is provided comprising a pivoting wheel stop carrying a detent and a rotating cam having a receiver. The detent seats in the receiver when the wheel immobilizer is in an unlocked position (with the wheel stop held at a spaced distance from the wheel) to allow rotation thereof. A lever is operably connected to the cam, whereby actuating the lever rotates the cam and unseats the detent from the receiver, urging a wheel-contacting surface of the wheel stop into locking contact with the wheel. In another aspect, a wheel locking assembly is provided comprising paired wheel immobilizers as described which may be operated independently. In still another aspect, a wheel locking assembly is provided comprising a first and second wheel immobilizer, wherein the first and second wheel immobilizers are operably linked by a flexible linkage.