Abstract: A wheelchair according to one embodiment is provided with a frame and a seat assembly that is movable in elevation relative to the frame. The frame has a seat hinge mounted thereto, and is rotatably coupled to left and right wheels. The seat assembly has a side member hingedly coupled to the seat hinge and a seat back hingedly coupled to the side member such that the seat back can be maintained at a constant angle relative to the frame when the side member pivots about the seat hinge and moves the seat assembly between multiple elevations. The wheelchair also comprises a lockable spring hingedly mounted to the frame and to the seat assembly; the spring is lockable at multiple positions thereby locking the seat assembly at the multiple elevations. This spring can be sufficiently elastic to suspend the seat assembly and absorb shock at each of the locked multiple elevations.

Abstract: The transportation apparatus includes a frame a seat portion which slides on the frame. A leg support pivots about the seat portion. At least one middle leg and at least one rear leg depends downwardly from the seat portion. At least one middle wheel is connected to the middle leg and at least one rear wheel is connected to the rear leg. The middle wheel and rear wheel define a middle and rear rotation axes, respectively. At least one front wheel is connected to the leg support. The middle leg is movable to adjust the vertical position of the middle wheel, and the rear leg is movable to adjust the vertical position of the rear wheel.

Abstract: A gear shift pertaining to a hub of a wheel with a quick lock. The hub has a gear which is supported round a shaft with an outer end and an inner end. The inner end of the shaft is suspended via a suspension device on a vehicle. The quick lock includes a rod which runs in a cylindrical hole which is concentric within and with the shaft and a catch which locks the wheel with the shaft to the suspension device. The gear shift includes the shaft, the rod and a control, all so adapted that the rod has a neutral position relative to the shaft and wherein a movement, relative to the shaft, of the rod from the neutral position in a direction from the outer end of the shaft towards the inner end of the shaft disengages the catch so that the wheel together with the shaft can be locked to and released from the suspension device.

Abstract: A chassis structure for a mid-wheel drive power wheelchair includes a pair of restricting racks each having a first restricting plate and a second restricting plate. Each restricting plate has a slot at a central portion thereof. A first fixing member is inserted through one end of the first restricting plate and the slot of the second restricting plate, and a second fixing member is inserted through one end of the second restricting plate and the slot of the first restricting plate, so that the two restricting plates overlap to extend and restrict with each other for maintaining a steady and balancing ride.

Abstract: The invention concerns a standing wheelchair for handicapped and invalid people, that includes a chassis supporting an articulated structure which includes a seat support structure, a footrest support structure, a backrest support structure, and support and maneuvering resources of the articulated structure. The support and maneuvering resources are located between the articulated structure and the chassis and which are designed to move the articulated structure from a sitting position to a standing position set back in relation to the sitting position, and vice versa. According to the invention, the standing wheelchair includes resources for setting the angle (?) between the footrest and the seat in the standing position.

Abstract: Attachments for a manual wheelchair are provided for navigating a wheelchair over obstacles and uneven terrain, such as a typical curb on a street. The attachments provide for regulating the movement of the wheelchair as the wheelchair descends the curb and to prevent the wheelchair from flipping over during such movement. The attachments include a front caster wheel slider assembly on each side of the wheelchair, a follower wheel assembly and a track belt damping bar. The front caster wheel slider assembly includes a piston that will quickly push the front caster wheels down after they roll over the top edge of the curb. The follower wheel assembly acts as a sensor that will release the piston in the assembly after the front caster wheels roll over the top edge of the curb.

Abstract: The Safety, Power and Shade Device is a system usable with wheelchairs providing an upright and horizontal frame attachable by brackets to a wheelchair seat back. The frame allows for the installation of safety and illumination lights, a solar panel for supplemental recharging of an electric wheelchair battery and a mean of shelter or shade. The frame assembly is constructed to allow the horizontal frame to fold over and behind the wheelchair for a vertical relationship with the frame upright.

Abstract: An all terrain adapter for a wheelchair that removably clamps onto the foot support of the wheelchair and supports a relatively large diameter, slightly inclined swivelling nose gear wheel at an extended distance from the foot support to stabilize the wheelchair when it is being pushed over soft or uneven surfaces and which swivels around when the wheelchair is moved forward to lift the front wheels of the wheelchair clear of the ground.

Abstract: A patient support system is described. The patient support enables a weakened or injured patient to support themselves in an upright position. Sitting in an upright position often provides the bed-ridden patient relief from pain, helps circulation and improves breathing. Embodiments are described that may be used with hospital equipment, wheel chairs as well as home furnishings such as conventional beds and chairs. The patient support position relative to the patient is adjustable through placement and may be fine tuned through embodiments including vertical and tilt adjustments built into the attachment means.

Abstract: The present invention discloses a deflecting apparatus for wheelchairs to prevent objects from rolling underneath wheelchairs, especially when engaged in sport activities. The apparatus is an accessory item that attaches in the front of a wheelchair below the seat and just above the floor/ground level. It is configured as a guard specifically to prevent sport balls such as basketballs, soccer balls, volleyballs and the like from being trapped under the wheelchair. The apparatus is attached with a pair of clamping arms on the rear of the plate to connect the apparatus to the specific structure of the wheelchair, particularly on the kick plate and is adjustable to conform to various sizes of kick plates. Alternate embodiments could serve as deflectors for other objects that may become hazardous to the wheelchair free movement if allowed to travel underneath the chair from the front.

Abstract: The stand-up unit (10) comprises a support (21), a stand-up frame (13), which is articulated on the support (21) and has a seat carrier (23) carrying a seat (17), and a backrest carrier (25) carrying a backrest (19). Furthermore, a first lever parallelogram (27) is provided in order to maintain the backrest (19) upright in any position. The backrest (19) can be displaced by the first lever parallelogram (27) by means of a rod (30), in order to ensure that no undesirable relative movement occurs between the backrest (19) and the back of the user when getting up or sitting down. A second lever parallelogram (29) controls the movement of the seat (17) when getting up and sitting down to ensure that no relative movement develops between the seat (17) and buttocks of the user. The stand-up unit may be provided with a base to serve as a chair, particularly a therapy chair. The stand-up unit, however, may also serve as a stand-up wheelchair, when connected to an undercarriage.

Abstract: The present invention provides a wheelchair apparatus with assistant function, comprising: a side frame set, comprising two side frames, a front horizontal shaft connecting pivotally between the two side frames, a sleeve set at the front end of the side frames, respectively, and a wheel set set on the side frames, respectively; two foot frame tubes, set in the sleeve, and having a gear-tooth segment; a seat frame set, comprising two seat frames, set above the side frame set, the front end of the seat frame set connecting pivotally with the side frame set, and a rear horizontal shaft connecting pivotally between the two seat frames; an extension mechanism, with both ends connecting to the front horizontal shaft and the rear horizontal shaft, respectively; one or more driving gear sets, set at the front of the side frames and driven linkedly by the front horizontal shaft; and one or more transmission gears, set pivotally at the front of the side frames, comprising a first arc gear-tooth part and a second arc ge

Abstract: Attachments for a manual wheelchair are provided for navigating a wheelchair over obstacles and uneven terrain, such as a typical curb on a street. The attachments provide for regulating the movement of the wheelchair as the wheelchair descends the curb and to prevent the wheelchair from flipping over during such movement. The attachments include a front caster wheel slider assembly on each side of the wheelchair, a follower wheel assembly and a track belt damping bar. The front caster wheel slider assembly includes a piston that will quickly push the front caster wheels down after they roll over the top edge of the curb. The follower wheel assembly acts as a sensor that will release the piston in the assembly after the front caster wheels roll over the top edge of the curb. As the back wheels of the wheelchair roll over and down the curb, the track belt damping bar slows the descent of the wheelchair.

Abstract: A wheelchair stabilizing device is presented. The device includes a latch spring-biased in the closed position, a mounting bracket, and a swing arm connecting the latch and the mounting bracket. Methods of use and manufacture are also provided.

Abstract: A wheelchair gym having a support bar releasably connected to the frame of the wheelchair. A vertical post is attached to the support bar and hand grips are slidably mounted on the vertical post. The hand grips are resiliently biased and may be moved conjointly or opposite to one another to provide arm exercise for a patient in the wheelchair. The gym also has leg supports on which resiliently biased foot rests may be moved conjointly or opposite to one another. The leg supports may be moved up and down or may be splayed laterally.

Abstract: A wheelchair with enhanced toilet access which facilitates independent use of the wheelchair by the user without intervention by caregivers. The wheelchair with enhanced toilet access includes a frame which includes a pair of laterally-separated side frame portions, with primary wheels as well as at least one secondary wheel rotatably mounted on the frame. A seat extends between the side frame portions, and includes a stationary portion and a movable portion.

Abstract: An all terrain adapter for a wheelchair that removably clamps onto the foot support of the wheelchair and supports a relatively large diameter, slightly inclined swivelling nose gear wheel at an extended distance from the foot support to stabilize the wheelchair when it is being pushed over soft or uneven surfaces and which swivels around when the wheelchair is moved forward to lift the front wheels of the wheelchair clear of the ground.

Abstract: A wheelchair luggage towing device to securely attach a luggage to the back of a wheelchair and pull the luggage along with the wheelchair. The device can be used with wheeled, as well as unwheeled luggage using a wheeled luggage carrier. The device comprises of a single or multiplicity of bars. A single bar is used with wheelchairs which have long vertical bars on their back. Two bars are used with wheelchairs which have a horizontal bar at their upper back. And three bars are used with wheelchairs which have two short vertical bars and no horizontal bar. In this case, a first bar is connected horizontally to the vertical bars of the wheelchair. A second bar is connected vertically to the first bar. And a third bar is connected horizontally to the lower end of the second bar. In all cases, the luggage is secured on the horizontal bar located close to the ground.

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

Abstract: An electric wheelchair that enables users suffering from impairment of the lower extremities due to paralysis or weakness caused by aging to manage their daily lives independently for social rehabilitation by allowing them to raise and lower the seat of the wheelchair between squatting and standing positions, to support their body weight at any position by stopping the chair, and to operate the movement of the wheel chair by using their arms or elbows pressed on either the inner or outer surfaces of the armrests even if both hands are occupied or impaired.

Abstract: A motorized wheelchair machine with stand-up support capability having independent front drive motors and wheels, drive wheels with axle centerline in vicinity of arches of user's feet, allowing more instinctive and natural maneuvering, simplified lift system using a linear actuator and collapsing parallelogram lifting frame design, for reduced cost and greater comfort. A preferred embodiment includes an onboard electrical cell charger, extendable and retractable charger cord compatible with standard household electrical outlets and an interlock switch that prevents use of the drive motors while charger is plugged into an electrical power receptacle and a novel leg-brace device.

Abstract: Gentle and substantially linear vertical motion of a wheelchair foot support is expected to provide superior results for maintenance of a wheelchair user's leg muscle mass' thus reducing atrophy of the wheelchair user's legs. Additionally, gentle continuous motion of the foot support is expected to aid in maintaining elasticity of the wheelchair user's leg joint ligaments' thus reducing contractures. Accordingly, an atrophy-reducing wheelchair includes a movable foot support mounted to a linkage that is movably connected to the wheelchair frame. As the wheelchair moves in normal operation, rotation of a wheelchair wheel drives the linkage to provide substantially linear vertical reciprocation of the foot support.

Abstract: The present invention provides a kit for attaching a manually operated wheelchair to a motorized scooter having a seating apparatus and supporting structure and a floor, comprising: (a) a motorized scooter attachment angle iron, wherein the angle iron comprises: (i) a vertical wall; and (ii) a horizontal wall, the horizontal wall forming approximately a right angle to the vertical wall, wherein the horizontal wall has at least two embedded elongated slots; (b) an angle iron attachment adjustable bar, wherein the adjustable bar comprises (i) a left elbow shaped tubular segment having a horizontally oriented bottom end and a vertically oriented top end; (ii) a right elbow shaped tubular segment having a horizontally oriented bottom end and a vertically oriented top end; and (iii) a straight middle tubular segment having a diameter larger than the left segment and the right segment, so as to permit the left segment to insert into a left end of the middle tubular segment and so as to permit the right segment to i

Abstract: A manually-powered wheelchair that includes one or more features that enhance the overall maneuverability and stability of the wheelchair, such as centrally mounted drive-wheels and an anti-tip system. Other embodiments may include at least one of an adjustable anti-tip system that may be selectively located to several locations on the frame; a positive stop device attached to either the mounting bracket, frame, or the anti-tip system for limiting movement of the anti-tip system and the frame relative to each other; a resistance device attached to the frame and the anti-tip system for increasing resistance between the frame and the anti-tip system when the user leans backwards in the wheelchair; a wheel lock system engaging at least one of the drive wheels below the wheel's axis of rotation; and a tilt prevention device for selectively preventing any rotation of the wheelchair frame and anti-tip system relative to each other.

Abstract: A double amputee conveyance includes a main frame with two rear wheels, for propulsion, and two swiveled castor wheels, for directional control, attached to the main frame. A seat assembly is attached to the main frame to provide relative movement between a rearward and a forward position and is constructed so that a forward edge extends beyond the main frame in the forward position. A stabilizing mechanism includes a stabilizing bar pivotally attached to the main frame so as to extend outwardly in a forward direction from the main frame and for movement between a raised and a lowered position. An activating lever is linked to the stabilizing bar to move the bar into the raised or the lowered position. The stabilizing bar engages the floor in the lowered position to stabilize the conveyance with the seat assembly in the forward position.

Abstract: A wheelchair includes a seat, one or more wheels and a seat weight sensing mechanism. The wheel includes a brake for stopping the wheel. The seat weight sensing mechanism is placed below the seat and is connected to the brake. When the seat is loaded by a weight more than a predetermined value, the seat weight sensing mechanism releases the brake to free the wheel. When the seat is not loaded by a weight more than a predetermined value, the brake stops the wheel.

Abstract: A handicapped accessible seat that classifies functionally as an aircraft seat is configured for maneuvering within an aircraft and docking to an aircraft floor using a typical track member having a longitudinal flange like extension and counterbores for mating with a shear plug of an aircraft seat. A bracket or track above the typical track member and containing inwardly-extending longitudinal flanges allows mating association with a plug or plunger on the wheel/caster or bottom seat structure of the handicapped accessible seat (94). A flange-like extension along the bottom portion of the track, having a planar portion along the floor of the aircraft and an outer, upward portion, could run the entire length of an aircraft or in only specific portions thereof and may also be used to guide the wheels into a locking position.

Abstract: Retractable fixtures for use with a wheelchair are disclosed herein. A retractable fixture of one embodiment includes a platform movable between a first position behind the wheelchair and a second position beside the wheelchair. A track having forward and rear ends is beside the wheelchair, and a carriage is configured to travel along the track. The carriage is rotatably coupled to the platform at a front pivot point, and an arm is rotatably coupled to the platform at a rear pivot point. The arm is rotatable about a fixed pivot point. When the platform moves from the first position to the second position, the carriage travels along the track toward the track front end, the platform rotates about the front pivot point in a first direction, and the arm rotates about the fixed pivot point in the first direction.

Abstract: A wheelchair is disclosed. An illustrative embodiment of the wheelchair includes a wheelchair frame, a pair of rear wheels and a pair of front wheels carried by the wheelchair frame, a drive motor drivingly engaging at least one of the pair of rear wheels and the pair of front wheels and a pair of wheelchair tracks detachably carried by the wheelchair frame.

Abstract: A wheelchair has a frame with rails and wheels. An accessory is adapted to be removably coupled to a rail. The accessory has a short downwardly extending cylindrical projection. A coupling assembly extends between the accessory and the frame. The coupling assembly includes a bottom subassembly. The bottom subassembly is adapted to encompass a rail. The rail has a vertically extending lower component. The lower component has a cylindrical vertical recess. The coupling assembly also includes an extension subassembly. The extension subassembly is provided between the bottom subassembly and the accessory. A supplemental cylindrical recess is provided in the accessory above its projection. The recess is adapted to receive a supplemental component.

Abstract: A wheelchair comprises a frame and first and second rear wheels that are each independently mounted to the frame via a respective mounting hub. Each rear wheel is detachably mounted to its respective mounting hub at two or more distinct hub mounting points. Either or both of the hub mounting points can be movable with respect to a remainder of the hub, for example via a pivoting arrangement. A disk can be positioned at the rear wheel and a stop element located at the mounting hub can be selectively operated to interfere with the disk to prevent rotation of that rear wheel. The frame can comprise first and second spaced apart and unitary tubes which each extending in an unbroken manner from a wheelchair seat to a wheelchair forward region.

Abstract: A gap-clearing mechanism for attachment to a wheelchair is disclosed. The gap-clearing mechanism has a lower member for attachment to the wheelchair, and an upper member spaced from and parallel to the lower member and being moveable relative thereto. The upper member has at least one support column securely attached thereto and depending therefrom. The at least one support column is slideably mounted relative to the lower member. There is a wheel assembly at a lower end of the at least one support column. The wheel assembly is moveable between a retracted position and an extended position. A wheelchair fitted with two such gap-clearing mechanisms is also disclosed.

Abstract: A transportation apparatus includes a backrest and leg support pivotably connected to a seat portion. The seat portion is slidably connected to first and second spaced apart slide rails. Each slide rail includes a plurality of telescoping members. At least one middle leg and at least one rear leg depends downwardly from the seat portion. At least one middle wheel is connected to the middle leg and at least one rear wheel is connected to the rear leg. The middle wheel and rear wheel define a middle and rear rotation axes, respectively. At least one front wheel is operatively connected to the leg support. The middle leg is movable to adjust the vertical position of the middle wheel, and the rear leg is movable to adjust the vertical position of the rear wheel. The plurality of telescoping members slide the seat portion in a substantially horizontal direction in relation to the rear rotation axis or the middle rotation axis.

Abstract: A detachable mobile seat includes a first part connected to a motor; a second part attached to the seat; and two links, each connected to the first part, the second part, and a wheel. The links transfer movement of the first part to the wheels. The first part includes a shaft connected to the motor, and two nuts disposed around the shaft that have screw threads in opposite directions and move along the shaft in response to operation of the motor. Each link includes a first link connected to the second part and to the nut, and a second link connected to the nut and to the wheel. The end of each second link that is nearest the wheel is rotatably connected to a connecting arm that has a rotating bar that rotates the wheel in response to operation of the links.

Abstract: A hand-operated assembly that supplies secondary drive power and steering control to a secondary drive wheel of a wheel chair. The assembly comprises a handle that is controlled with one hand and a linkage rod that extends from the handle to an eccentric arm fitted to a one-way clutch assembly at a secondary drive wheel support axle. Reciprocating up-down, pivoting movements of the handle over a range Y? in the Y axis directs a linkage rod to rotate an eccentric arm fitted to a one-way clutch and a drive axle of a small diameter, secondary drive wheel. Independent 360° rotation of the handle about a second, horizontal or Z axis steers the secondary drive wheel. A portion Y? of the range of handle motion directs a flange at the linkage arm to engage a brake piece that contacts the secondary drive wheel. Large diameter, hand driven, primary drive wheels are separately available to the user for effecting normal chair conveyance.

Abstract: A latching mechanism permits a swing-away foot rest assembly on a wheelchair to be selectively latched into a use position extending forwardly from the wheelchair. Mating connectors are provided on the foot rest assembly and the frame of the wheelchair which are movable relative to one another by a transverse rocking pin which rocks about an upright lever axis in two directions to permit the latching mechanism to be released by deflecting a release lever coupled to the rocking pin in either one of two opposing directions. The release lever can be coupled to the rocking pin in a plurality of different orientations in the use position to suit the user. Camming faces on the connectors automatically align and load the mating connectors into an engaged position when the foot rest assembly approaches the use position from any one of multiple different directions.

Abstract: A wheelchair having wheel track adjustability. The wheelchair including a frame, a seat situated within the frame, two drive wheels mounted to the frame at wheel axles and at least one steerable wheel. Each axle connected to a fitting removably coupled to the frame, with the fitting mounted to at least one support plate whose thickness varies around the circumference to position the fitting and axle at an angle. The support plate rotatable to change the angle of the fitting and axle and thereby correct wheel track error. The support plate mountable to a bracket pivotally mounted to the frame, such that pivoting movement of the bracket results in rotation of the support plates.

Abstract: A wheelchair has a first frame unit including a first wheel unit, a second frame unit including a second wheel unit, and a quick release unit including an axle that is connected rotatably to one of the first and second frame units. The axle is rotatable from a retaining position, where separation of the axle from the other one of the first and second frame units is arrested, to a releasing position, where separation of the axle from the other one of the first and second frame units is permitted. One of the first and second frame units is further provided with a third wheel unit, and the other one of the first and second frame units is further provided with a seat unit.

Abstract: A combination wheelchair and transfer board having a flip-back armrest. The flip-back armrest lowers upon and secures the transfer board in a vertical position at the side of the wheelchair. The armrest includes a channel for receiving a top edge of the transfer board. When the armrest is rotated back, the channel releases the top of the transfer board and the armrest is moved backwards sufficiently so that the transfer board is free to move upward. A rear landing pad is provided that supports and secures the transfer board in the vertical position at the side of the wheelchair. The rear landing pad pivots with the armrest. A plastic, self-locking plug permits the transfer board to be attached to a standard armrest receiver on a wheelchair. The self-locking plug snaps into place, and includes either a swedged portion or tabs to lock it into place.

Abstract: A wheelchair guidance system connect-able to a conventional wheelchair for permitting the person guiding the wheelchair to stand beside the disabled person in the wheelchair as he or she guides movement of the wheelchair.

Abstract: A wheelchair propulsion and braking system (10) includes at least one clutch engagement disk rotatably couplable to a wheelchair frame (14). The clutch engagement disk (32) includes a gear (38) that is rotatable with the clutch engagement disk (32), and a drive chain (40) disposed around the gear (38). A drive wheel (50) is rotatably attachable to a wheel (22) of the wheelchair (12), and operatively attachable to the drive chain (40). The system also includes at least one lever arm (60) that is rotatably couplable to the wheelchair frame (14). The at least one lever arm (60) includes a handle (62) operatively coupled to an upper end (64) of the lever arm (60). The handle (62) is oriented in an accessible position during use. A pair of calipers (70) is operatively coupled to each lever arm (60), and engageable with the at least one clutch engagement disk (32). An actuator (80) is operatively coupled to the handle (62) to actuate the calipers (70), and to engage the clutch engagement disk (32).

Abstract: By bending and stretching a link mechanism, both left and right wheels of a vehicle can be inclined toward inside of cornering to generate a camber thrust as a lateral force, i.e. an increase in cornering force. Further, by bending and stretching the link mechanism, the passenger compartment can be inclined in accordance with inclination of a connecting link, and thus the center of gravity of the vehicle can be moved toward its inner wheel during cornering. By preventing lifting of the inner wheel during cornering, cornering performance is improved. Because the passenger compartment is inclined toward the inner wheel during cornering, centrifugal force is less likely to be felt by the occupant.

Abstract: A wheelchair is capable of radiographing with the wheelchair as is by using a general radiographic device, without a need to switch to a different chair. The wheelchair includes a seat portion, a backrest portion provided with upper frame bodies mounted approximately perpendicular to the seat portion and a main body detachably mounted to the upper frame bodies transversely of the upper frame bodies, holding portions installed consecutively to the upper frame bodies, and wheels. The upper frame bodies are approximately perpendicular to the ground plane of the wheels, the main body is configured of an X-ray transmissive material, and the holding portions are installed consecutively to the upper frame bodies detachably and turnably.

Abstract: A wheelchair suspension is provided. The wheelchair suspension includes a frame, a pivot arm, a front caster, a drive assembly, and a rear caster. The pivot arm is pivotally coupled to the frame. The front caster is coupled to the pivot arm. Movement of the drive assembly in a first direction causes the pivot arm to substantially remain in a first position. Movement of the drive assembly in a second direction urges the pivot arm away from the first position.

Abstract: Apparatus for releasably coupling an elongate member to a support member, comprising: a first coupling part for attachment to an elongate member; a second coupling part for attachment to a support member, the first and second coupling parts having interengageable profiles; a releasable locking mechanism for locking the first and second coupling parts together to resist relative movement therebetween once their respective profiles are interengaged; wherein the first and second coupling parts and the releasable locking mechanism are configured such that the first coupling part is lockable relative to the second coupling part in one of two predetermined configurations which are angularly spaced about a central axis.

Abstract: The claimed invention provides an apparatus and system for mounting a wheelchair arm pad to a wheelchair that provides a high degree of support and adjustability such that it can be used with wheelchairs from a wide variety of different manufacturers. In order to provide this custom fit, the claimed invention provides for a single point mounting system having elevation, articulation, depth, and width adjustability.

Abstract: A wheelchair comprising: three or more ground-engaging wheels; and a user seat, the user seat forming a structural member or monocoque on which the ground-engaging wheels are supported; wherein at least one of the wheels is connected to the seat by a support member, the length of the support member being adjustable during use. Also provided is a wheelchair or other wheeled vehicle, wherein at least one ground-engaging wheel is connected to a pivotable hub, and the said wheel is adjustable. Also provided is a wheelchair, wherein a ground-engaging wheel on each side of the wheelchair is provided with a brake. Also provided is a wheelchair or other wheeled vehicle in which one or more ground-engaging wheels are provided with ratchet means. A coupling arrangement for releasably joining two structural members is also provided. Also provided is a wheelchair including a rear castor with a detent mechanism.

Abstract: A gear shift pertaining to a hub of a wheel with a quick lock. The hub has a gear which is supported round a shaft with an outer end and an inner end. The inner end of the shaft is suspended via a suspension device on a vehicle. The quick lock includes a rod which runs in a cylindrical hole which is concentric within and with the shaft and a catch which locks the wheel with the shaft to the suspension device. The gear shift includes the shaft, the rod and a control, all so adapted that the rod has a neutral position relative to the shaft and wherein a movement, relative to the shaft, of the rod from the neutral position in a direction from the outer end of the shaft towards the inner end of the shaft disengages the catch so that the wheel together with the shaft can be locked to and released from the suspension device.

Abstract: A wheeled chair apparatus is adapted for connection with an elevatable stand, such as a hydraulic stand, and the subject wheeled chair apparatus includes a wheeled chair unit which includes a seat portion and a reclinable seat back portion connected to the seat portion. A wheel assembly is connected to the seat portion, and elevatable stand attachment means are connected to a bottom side of the seat portion. The elevatable stand attachment means are adapted for connection with the elevatable stand. By using the elevatable-stand-adapted, wheeled chair apparatus of the invention, substantial amounts of time, effort, and stress on a person in the wheeled chair are reduced in carrying out a cosmetological activity on the person, when compared with conventional procedures for handling a person in a wheeled chair when carrying out a cosmetological activity.

Abstract: A wheelchair having a rotatable vertically adjustable seat that can rotate at least 180 degrees. A vertical adjustment means adjusts the seat from a base position to an elevation above the diameter of the wheel chair drive wheels. The seat can swivel or be fixed by an anti-rotation means. The wheelchair can be conventionally configured with guide wheels forward or reversed with drive wheels forward for use on rough ground or uneven surfaces.