Abstract: A reconfigurable support assembly accessible to a wheel chair bound user for supporting and elevating the user between seated and erect postures. A base frame is configurable to be stationary with foot pads or mobile with roller casters or wheels. Molded foot restraints mount to a base frame or an elevated cross tower to support the feet at selected orientations. A telescoping forward support framework accepts a variety of adjustable accessories, including cushioned knee or leg support assemblies, a chest or upper body support, a table top, arm troughs and manual, hand driven drive assemblies. Adjustable seat and seat back assemblies optionally support pivoting armrests, hip and lateral trunk supports, an extendible back support frame, shoulder retainers, and a head rest. The position of a seat cushion and inclination of the seat back are separately adjustable.

Abstract: A wheelchair or water closet chair that has arms that may be selectively raised and lowered and a water closet chair that has handgrips that may be selectively raised and lowered. The arms and handgrips have extensions movable towards each other to effect engagement with each other. In addition, each has sensors that sense when the extensions of each are in alignment with each other.

Abstract: The present invention relates to a configuring frame for walker which comprises a pair of front tubes which has a S-shape configuration and being provided with a caster in the lower end. The upper end of the front tube is telescopically connected with a hand grip and which has a belt socket in the end portion. A back belt is bridged between the two belt sockets such that a backrest is formed. The middle portion of the front tube is disposed horizontally when the front tube is assembled. Those two front tubes is interconnected by means of a first traverse tube which is located adjacent to the caster and a second traverse tube which is located at the middle or horizontal portion of the front tubes. A pedal is pivotally mounted at the first traverse tube. And a pair of rear tubes and which has a horizontal portion and an inclined portion which extends downward and rearward. The end of the inclined portion is mounted with a caster.

Abstract: The invention is to a wheel chair assembly and a seat transfer mechanism that permits the person on the seat and the seat to move laterally. The seat is on a platform that has a base and first and second laterally movable platforms. The wheel chair seat is latched to the top one of the two laterally movable platforms. The bottom of the seat has two tracks that are matched to and engage a track on a fixed seat frame such as a seat on an aircraft.

Abstract: A folding wheelchair has a pair of spaced apart side frames (114) joined together by a seat (126) and a back (118) for supporting a person transported in the wheelchair. Each frame has a pivotally mounted, wheeled front leg (116) and a pivotally mounted back fork post that straddles a mar wheel (118). The rear wheel has a quick release mechanism. By virtue of the pivotal mounting (112) front legs of the wheelchair fold under the seat and the back folds over the seat. The rear wheels are released from the wheel chair for storage along with or apart from the wheelchair.

Abstract: A low-cost wheelchair that is formed from side members made from continuous, bent single pieces of tubing that is formed to create a loop, and crimped at the juncture where the loop is formed. An axle is mounted at the juncture of each loop, and a large rear wheel is mounted on each axle.

Abstract: A foldable wheelchair has a folding mechanism connecting two side frame assemblies to each other. The side frame assemblies each support a castor frame piece, pivoting shafts of the folding mechanism, drive wheel axles and a seat back tube. The side frame assemblies are made of two halves that are secured together and may be fabricated from compression or injection molded composite plastics. The seat angle is adjusted by pivoting the side frame assemblies around a pivot point located in an upward and forward region of the side frame assembly.

Abstract: A collapsible wheelchair has an L-shaped monocoque chassis (2), rear driving wheels (33) and front castor wheels (18). A backrest (30) is pivoted (at 44) to the rear of the chassis, and a seat (31) is pivoted (at 46) to the front of the backrest and rests on trunnions (51) locating in slots (52) in side-plates (50). The wheelchair is collapsed by lifting the seat front to raise the trunnions out of the slots and then moving the seat and backrest forwardly and downwardly so they nest in the angle of the `L` of the chassis. The rear wheels are detachable and a footrest bracket (20) is turnable to bring the footrest (21) over the top of the stowed backrest and seat.

Abstract: A chair for moving a non-ambulatory user having a first wheeled frame and a movable second frame that raises and lowers with respect to the first frame. A seat is releasably secured to the second frame so that the seat raises and lowers in combination with the second frame. The chair may have pivotable large wheels secured thereto to provide easier movement across a surface.

Abstract: A patient transporting device which is capable of functioning as a wheelchair and as a stretcher. The device has a seat assembly which can also be readily converted, while mounted on the frame, to function as a stretcher. The conversion of the seat assembly into a stretcher shifts the seat forwardly relative to the base as the back is folded down to maintain the center of gravity of a patient more centrally located over the base.

Abstract: A wheelchair apparatus is provided for selectively positioning the operator from a sitting position to a standing position or a reclining position. The wheelchair apparatus includes a frame for supporting the operator's body in a reclined, sitting, and standing position. A single positioning actuator is used to selectively move the operator in the frame. A programmable controller controls the operation of both the chassis drive motors and the positioning actuator. The frame and chassis components are interconnected to achieve the desired positioning with a minimum number of electro-mechanical components. A sliding back frame is provided to eliminate shear forces on the back of the operator. The foot rest and frame are shifted towards the rear of the wheelchair when the operator is moved to a standing position such that the weight of the operator is over the axis of the large front wheels.

Abstract: The invention is an improved wheel chair made essentially of metal or plastic pipe, and is capable of being folded into a compact size which may be conveniently stored in the hanging wardrobe or overhead storage of an aircraft. The chair comprises a removable cane handle supported back rest, removable foot rest and rear extension bar and a fabric seat looped over and fastened to and between a pair of seat bars affixed to a pair of intersecting braces connected together by a longitudinal bolt. The intersecting braces each have a sleeve affixed at the bottom end which fit on and rotate on pivot means affixed to the bottom of the side frames. The intersecting braces are pivotally connected to the seat bars for retaining the side frames in spaced relationship during folding and unfolding.

Abstract: A hand-propelled wheelchair comprising a frame element to which is mounted a pair of large drive wheels and a pair of front caster wheels, the wheelchair further comprising a seat unit having a base and a back, the seat unit being slidably mounted on the frame in such a manner as to be manually slidable and arrestable in a plurality of desired positions along the frame element by the user while seated in the seat of the wheelchair, to vary the center of gravity of the user and the seat unit with reference to the axis of the drive wheels without disassembly of the drive wheels, the frame element or the seat unit from each other.

Abstract: A collapsible wheelchair conveniently switchable between deployed and stowage modes resists bending and torsional distortion. The wheelchair narrows for negotiating narrow airplane aisles, and it may be broken down or reassembled in the field without special tools. A rigid, generally cubicle, wheeled frame is foldable between deployed and retracted orientations. Drive wheels can be independently removed to narrow the wheelchair to clear restricted spaces. The frame supports a removable chair equipped with removable arm rests and an adjustable foot rest. The chair is mounted to a power pack centered between the opposite frame sides and mechanically interconnected by a pair of similar, spaced apart parallelogram linkages. The power pack comprises a pair of synchronized pneumatic cylinders coaxially disposed within separate tubular, extensible sleeves. Each parallelogram linkage comprises separate metallic links occupying a plane perpendicular to the frame sides for synchronizing side movement.

Abstract: A conversion kit for standard wheelchairs whereby a wheelchair with a stationary fixed seat can be retrofitted with a tiltable seat having a reclinable back. The seat and back may be separately infinitely variably adjusted by extendible lockable adjusters and the seat and back apparatus is readily mountable upon conventional wheelchair constructions.

Abstract: A foldable wheelchair having a folding mechanism connecting two side frame assemblies to each other. The side frame assembly supports a castor frame piece, pivoting shafts of the folding mechanism, drive wheel axles and a seat back tube. The side frame assemblies are made of two halves that are secured together and may be fabricated from compression or injection molded composite plastics. The seat angle is adjusted by pivoting the side frame assemblies around a pivot point located in an upward and forward region of the side frame assembly.

Abstract: A wheelchair including a wheeled base assembly provided with an upright assembly thereon, the latter including a pair of vertical post arrangements which are provided adjacent front corners of the wheelchair and are vertically extendible and retractable. The upright assembly includes a pair of generally parallel and approximately horizontal arms which are mounted adjacent upper ends of the upright post arrangements. A seat assembly is removably attached to and positioned between the arms. The seat assembly includes a seat portion defined by normally vertically superimposed upper and lower seat subassemblies. The upper subassembly has an enlarged opening formed centrally therethrough. The lower subassembly can be detached and moved from beneath the upper subassembly to permit the seat portion of the wheelchair to be positioned directly over and utilized in conjunction with a conventional toilet so as to not require removal of the occupant from the seat assembly.

Abstract: A wheelchair arrangement provided with a wheeled base assembly having an upright assembly thereon, the latter including a pair of vertically extendible post arrangements positioned on opposite sides of the wheelchair arrangement. The upright assembly includes a pair of top arm arrangements which are cantilevered rearwardly from the upper ends of the posts arrangements. A seat assembly is removably attached to and positioned between the arm arrangements to facilitate transferring of an occupant, along with the seat assembly, either to or from the wheelchair arrangement. The arm arrangements permit both linear movement of the seat assembly in the front-to-rear direction and horizontal pivoting movement of the seat assembly sidewardly relative to the base assembly so that the seat assembly is oriented transversely relative to the front-to-rear direction.

Abstract: In order to present patients in the correct position for surgical or investigative procedures and in order to reduce the time required to place on and remove from operating surfaces on which such procedures are carried out on patients, a wheelchair of novel configuration is described. The wheelchair has a seating arrangement comprising a back rest portion, a seat portion and foot rest means, adapted to receive a patient in a semi-recumbent or sitting position. The seating arrangement can be tilted so that the back rest portion is substantially horizontal and the seat portion is divided so that the patient's legs can be moved apart, while still supported, to present the patient's ano-genital region for surgical or investigative procedures.

Abstract: A mechanism for reclining a back of a sitting part of a baby carriage as well as head protection plate attached to the back. The mechanism includes an engagement member disposed on a rear of the back and having a plurality of notches arranged vertically with respect to one another; a support rod pivotally coupled to opposite sides of the seat and extending across the rear of the back, the support rod being pivotable up and down with respect to the back; and a stopper attached to the support rod and having an engagement rod attached thereto which is engageable with the notches of the engagement member. The engagement rod is movable up and down along the back in correspondence with the pivotable movement of the support rod such that the back is supported at a selected position by engaging the engagement rod is one of the notches.

Abstract: A wheelchair that is light in weight and collapsible has drive wheels that are readily removed to reduce its weight and enable a handicapped person or other user to fold it up while the user is in a sitting position. The user may readily change it from a conventional wheelchair to an invalid's caster chair and back. The wheelchair has a fabric seat, seat back, and leg support to reduce its weight, make it inexpensive to manufacture, and make it easy to collapse, and it has no arms to make it easier for a handicapped person to get into and out of the wheelchair.

Abstract: The invention is an improved wheel chair in which the seat may be raised or lowered by a hand powered hydraulic ram mechanical means to levels that match the surface of the chair or bed to which the patient is being transferred. A commode function is also provided. The chair comprises a base having swivel casters and fixed wheels, an upper unit having a seat and backrest and a hydraulic pump, and a seat raising mechanism consisting of four pairs of interconnected levers connected by two cross bars in such a way that when the bars are pushed apart by a hydraulic ram, the separating motion is amplified to give the desired range of chair seat travel height.

Abstract: A tilting and laterally folding wheelchair design is described in which a tilting mechanism incorporating a pivoting action at both the front and back of the chair is provided so that as the chair is tilted the center of gravity of the occupant is maintained relative to the wheelbase. A lateral folding device, which incorporates X-cross members free at their upper ends, is stabilized by link members which are pivotally mounted at their outer ends, so as to provide room for the chair to be folded laterally.

Abstract: A wheelchair including a wheeled base assembly provided with an upright assembly thereon, the latter including a pair of telescopic vertical post arrangements which are provided adjacent the front corners of the wheelchair and are vertically extendable and retractable. The upright assembly includes a pair of arms which are secured and cantilevered rearwardly from the upper ends of the upright post arrangements. A seat arrangement is removably attached to and positioned between the arms to facilitate transferring of an occupant, along with the seat assembly, either to or from the wheelchair.

Abstract: The invention is an improved wheel chair made essentially of metal or plastic pipe, and is capable of being folded into a compact size which may be conveniently stored in the hanging wardrobe or overhead storage of an aircraft. The chair comprises a removable cane handle supported back rest, removable foot rest and rear extension bar and a fabric seat looped over and fastened to and between a pair of seat bars affixed to a pair of intersecting braces connected together by a longitudinal bolt. The intersecting braces each have a sleeve affixed at the bottom end which fits on and rotate on pivot member affixed to the bottom of the side frames.

Abstract: A convertible combined stroller and trailer which can be changed from a stroller mode to a trailer mode and vice versa. When the vehicle is in either the stroller mode or trailer mode it includes a flexible seat for one or more passenger. When used in a stroller mode, rear wheels are attached to the opposite sides of the rear of the frame at a position called "Position S" and front wheels are attached to the opposite sides of the front of the frame. At this position the load on the frame is distributed evenly on the rear wheels and on the front wheel. When the vehicle is in a trailer mode the front wheels are removed, the rear wheels are moved from the "Position S" to a position forward and upward on the sides of the frame called "Position T", and one end of a tow bar is attached to the front of the vehicle frame. Another end of the tow bar is attached to the rear of a towing vehicle, such as a bicycle frame.

Abstract: A wheelchair includes a seat panel which is adjustable in a vertical direction upon the manipulation of a jacking assembly beneath the seat panel by an attendant or person other than the wheelchair occupant. During this shifting of the seat panel it is guided by engagement of its corners with four vertical frame members of the wheelchair. Armrests and side portions of the chair frame are pivotable to an out of the way position to form an enlarged planar surface area permitting at least partial reclining of the occupant and ready shifting to a lateral surface such as an adjacent bed. The wheelchair is alternatively supported upon four small wheels, at least two of which caster or, upon two small front wheels and two larger diameter drive wheels thereby offering the most efficient manipulation by either the occupant or an attendant.

Abstract: An electrically driven wheel chair for disabled persons wherein a seat support resting on a rigid wheel frame (8) is vertically adjustable by the aid of an electrically driven force transmitting member (12). The seat support comprises an upper frame portion (1) attached to rigid wheel frame (8) via two pairs of scissors-type bars (4,5), each end of the pairs of scissors-type bars being alternately pivotally or pivotally and slidably connected with upper seat support frame (1), and lower rigid wheel frame (8), respectively. Front end (18) of the upper seat support frame (1) is via supporting bars (14,16) and linkage elements connected with wheel frame (8) and simultaneously with pair (5) of scissors-type bars, which is actuated by piston rod (12) to change the height of the seat support. The vertically adjustable support permits an arrangement of footrest and calf support providing continuous change of their position so that the users's legs will have an anatomically correct posture all the time.

Abstract: A trigger activated device for adjusting the inclination of a back frame of a wheelchair including a pair of adjusting assemblies provided on each of two sides of the back frame. Each adjusting assembly includes a horizontally disposed support which is fixed to a rear portion of a seat frame of the wheelchair. A back member is pivotally attached to the support. A threaded bar is pivotally attached to the back frame. A handgrip is attached to an upper portion of the back member. A trigger device disposed under the handgrip. A T-shaped hollow tube having a lug formed at one end thereof includes a first section and a second section protruding from a middle portion of the first section. The T-shaped hollow tube is pivotally mounted on a free end of the support via the lug. The threaded bar passes through the first section of the T-shaped hollow tube. An end cap is provided at a free end of the second section of the T-shaped hollow tube.

Abstract: A lightweight universal electric wheeled chair is formed of hollow tubular frame members. The seat is preferably cantilevered from rear frame members. The frame includes two lower side frame members, each of which has relatively small wheels mounted at both ends. The frame also includes two rear frame members, pivotally connected together intermediate their ends to form an "X" configuration with the lower ends of each of the rear frame members being pivotally secured to the rear ends of the lower side frame members. The front of the two lower side members are coupled together using two frame members and linear bearings intercoupling the two frame members to permit adjustment and collapsing of the wheeled chair. Two upper side members extend forwardly from the rear of the wheeled chair, and are secured to the rear frame members.

Abstract: A device and method that will safely elevate a wheel chair to a greater height, hold the wheel chair in a safe elevated position and allow a person confined to the wheel chair to achieve the height of that of a standing person. The feet of the wheel chair are first rotated outward and lowered onto the floor, the wheel chair is then elevated by air pressure to a desired height and locked off for safety. When the wheel chair is being elevated or lowered, it will automatically lock off if the chair becomes unlevel for any reason.

Abstract: A lightweight foldable wheelchair is provided which comprises a seat having a base and a back hingedly attached to the base, the back being foldable to overlie the seat base; a pair of large wheels each demountably attached to the end of an axle at the bottom rear of the seat base and rearward of the center of gravity of the chair; a first strut having its rearward end hingedly mounted to the underside forward portion of the seat base of the seat; and a second strut having its rearward end hingedly mounted to the underside of the seat base of the seat rearwardly of the first strut and forward of the wheel axle, the forward ends of both struts abutting below and forward of the seat and securing a demountable caster wheel and hingedly mounted footrest, and the struts being foldable to underlie the seat. The wheelchair can therefore be folded into a compact configuration when the wheels are demounted.

Abstract: A device and method that will safely elevate a wheel chair to a greater height, hold said wheel chair in a safe elevated position and allow a person confined to said wheel chair to achieve the height of that of a standing person. The feet of the wheel chair are first rotated outward and lowered onto the floor, the wheel chair is then elevated by air pressure to a desired height and locked off for safety. When the wheel chair is being elevated or lowered, it will automatically lock off if the chair becomes unlevel for any reason.

Abstract: By adjusting two telescoping-type interengaging shiftable parts for each of two frame bars (3,4) of a support frame (2) of a lightweight wheelchair (1), the sitting position of the same can be adjusted with respect to the seat surface (5) and with it the adjustment of the center of gravity can be dynamically adjusted with respect to the user. Additional adjustment possibilities by means of each support element (17) at the right and left sides of the seat surface (5) with respect to the rear axle as well as corresponding clamping devices for the front wheels (9,10) on the frame (2) allow a very precise user-compatibility in this lightweight wheel chair. Additionally a backrest (6) can be collapsed with respect to the seat surface (5) by means of handles (20) pivotally connected with the frame bars, to thereby permit the lightweight wheelchair (1) to be compactly folded up for transportation purposes.

Abstract: A portable wheelchair having a metal wire frame is provided. The individual frame members are interconnected by clinched loop, hinged connections, and fold together in a manner that minimizes the space required for the stored configuration of the wheelchair. The metal wire fabrication also minimizes the wheelchair weight and the visual profile of the wheelchair in its deployed configuration.

Abstract: A lightweight universal electric wheeled chair is formed of hollow tubular frame members. The seat is preferably cantilevered from rear frame members. The frame includes two lower side frame members, each of which has relatively small wheels mounted at both ends. The frame also includes two rear frame members, pivotally connected together intermediate their ends to form an "X" configuration with the lower ends of each of the rear frame members being pivotally secured to the rear ends of the lower side frame members. The front of the two lower side members are coupled together using two frame members and linear bearings intercoupling the two frame members to premit adjustment and collapsing of the wheeled chair. Two upper side members extend forwardly from the rear of the wheeled chair, and are secured to the rear frame members.

Abstract: A cart assembly for a partially-immobilized animal. It includes a plastic cradle, having wheels, adapted to support and partially encompass the hind portion of the animal. A harness, secured over the head of the animal, is fastened to the plastic cradle.

Abstract: Wheelchair side frames (A) include forward and rearward side frame fortions (10, 12) which are telescopically interconnected such that the length of the side frames is selectively adjustable. A cross brace folding assembly (B) interconnects the side frames and selectively moves the side frames between folded and open configurations. The cross brace mechanism includes a pair of cross brace members (30, 32) which are pivotally interconnected (34) and which are each adjustable in length to adjust the width of the wheelchair in the open configuration without adjusting the height of the seat (100). A pair of rear seat support members (114) are telescopically mounted on posts (112) of the rear frame and are interconnected with stand-off members (120) for supporting a seat back portion (110). The stand-off members hold the seat back away from the rear seat support members such that the clamps from orthopedic braces and appliances may be freely mounted therealong.

Abstract: A foldable wheelchair having opposed main side frames each comprising front and rear members supported on respective front and rear wheels and connected by upper and lower cross members, and a back member mounted for folding movement relative to the rear member wherein the side frames are connected by first and second foldable links for maintaining the side frames spaced apart in the erected condition of the wheelchair in which the back members are aligned with the rear members and support a flexible back panel, and the wheelchair is collapsible to a compact folded condition by folding the links to move the side frames adjacent to each other and by folding the back members to extend downwardly adjacent to the rear members and the associated rear wheels.

Abstract: An adjustable wheelchair comprising a supporting frame having a front, a rear and a pair of sides defining a seat portion inbetween; a pair of main wheels rotatably mounted to the frame and a pair of secondary wheels rotatably mounted to the frame for pivotal movement with respect thereto. The frame includes a series of split clamps for continuous adjustment of the width of the seat portion over a defined range. A cushion is fastened to the seat portion by means of a pair of overlapping flexible supports having Velcro material thereon for joining the supports of varying degrees of overlap. The main wheels and secondary wheels are adjustable in both vertical and horizontal directions, and the chair is collapsible horizontally as opposed to vertically. The armrests are rotatable for allowing the chair back to be collapsed. A pair of footplates are swingably mounted to the frame for pivotal movement and the footplates may also be adjusted to varying degrees of inclination with respect to a horizontal plane.

Abstract: The travel chair has a form-fitted shell which is attached to a metal frame, capable of transporting handicapped and elderly persons from their residence; through public transportation terminals; aboard public transportation vehicles, such as aircraft and busses; hence to their destination without the individual leaving the apparatus. Folding rear legs allows the apparatus to be placed in a conventional seat without the individual leaving the shell. In limited spaces, the shell can be removed from the frame and placed in a conventional seat without the individual leaving the shell. In either configuration, the person, while remaining in the shell, can use conventional restraint devices, such as aircraft and automotive seat belts. In addition, inherent safety devices are incorporated in the apparatus for personal security. For storing or separate transportation, both the front and rear legs of the apparatus can be folded; thereby reducing the required space by approximately one-half.

Abstract: A wheeled structure is readily convertible as between a full-sized single bed and a wheelchair. The structure comprises three pivotally interconnected sections, namely a foot section, a seat section and a head section. In the bed forming position of the unit, the three sections are disposed horizontally to form a continuous mattress support surface. To convert the unit to the wheelchair forming position, the head section is swung upwardly and secured in position by latch members on the back ends of pivotal armrests. The foot section is swung down into vertical orientation and secured to the seat section by bracing rods. The device is simple to convert as between the wheelchair and bed forming positions.

Abstract: To reduce the weight of the collapsible wheelchair, and the depth of the wheelchair, when collapsed, only three spreader braces (25,49,51) are used to connect, respectively, the back and side frame elements, (45,47) of the collapsible wheelchair together, the remaining interconnection being formed by tension cables (53;57',57",59"), which tend to counteract the spreading effect of the collapsible spreader braces, and are located, with respect to the spreader braces, in triangular position, one (53) of the tensioning cable extending parallel to two spreader braces (49,51) located in triangular configuration with respect to the frame elements (45,47), and other tensioning cables extending diagonally, in pairs (57,59) between the frame elements (45,47), located at the rear portion of the chair to hold the rear portion towards each other when the weight (24) of the user tends to pull together the forward portions (45d,47d) of the frame elements (45,47).

Abstract: A wheelchair has two foldable side frames, link members which cross one another and are pivotable about a common horizontal axis so as to fold the side frames, front wheels and rear wheels connected with the side frames, a back rest with upwardly extending back supporting members, a seat with seat supporting members which are movable upwardly and downwardly in dependence upon a folding movement, and a foot support with foot support carrying arms, wherein each side frame is provided with guide receivers for the seat supporting members, and with supports for the link members, and wherein a rear wheel axle block and the front support carrying arms are formed as a one-piece element of synthetic plastic material. Such side frames have a lower weight, but are stable nevertheless, and also result in an improved handling of the wheelchair.

Abstract: The invention relates to an apparatus for lifting a wheel-chair into and out from a vehicle, having a lifting arm which may be connected to the wheel-chair. According to the invention the apparatus comprises a substantially Z-shaped stand (4) having a lower support and mounting plate (5) intended to be attached to the vehicle floor at the place for the driver's seat by means of a number, suitably three, of bolts (6), and a substantially vertical middle portion (7) an an upper support plate (8) intended to be positioned on top of the back seat of the vehicle, a lifting mechanism (25-45) and a swinging equipment (36-45) for the lifting arm (3) whereby the lifting arm (3) and the lifting mechanism (25-34) and the swinging equipment (36-45) are carried by the upper support plate (8) of the stand (4). The invention also relates to a collapsible wheel-chair especially adapted for use together with the lifting apparatus.

Abstract: A wheelchair having a backrest assembly that is pivotally connected adjacent the rear end of its seat frame. The back assembly has a rear panel fixedly attached thereto and there is structure on the front surface of the rear panel which connects to structure on the rear surface of the front panel which allows the front panel to reciprocally travel upwardly and downwardly with respect to the rear panel. There is structure for forcing reciprocal movement of the front panel and this is attached to the rear surface of the front panel and this is made possible by the cutout slot in the rear panel. The wheelchair has structure for forcing the back assembly to recline rearwardly and this is coupled together with the structure for forcing the reciprocal movement of the front panel of the back assembly so that their travel is coordinated to operate together.

Abstract: A lightweight wheelchair is provided which includes a frame formed of a plurality of elongated members. The frame includes vertical polygon sides which have a generally triangular configuration. The wheelchair seat is supported above a pair of elongated axle support members which join to the rest of the frame at points near the front and back of the frame. An axle extends between the axle support members and is attached at a medial point on each axle support member. The configuration allows for flexing of the axle support members in response to shocks. The frame effectively handles loads and shock with a minimum of structural mass.

Abstract: The invention relates to a collapsible wheelchair chassis of the type including two side frames, which are jointed together by a pair of crossed braces provided with a pivot joint at their middle. According to the invention, the braces are arranged in a horizontal plane in order to obtain maximum compactness of the chassis in its collapsed state.

Abstract: A low effort high mechanical advantage occupant-operated rotary lever near one arm rest of a folding wheelchair is connected through a short cable to a longitudinal seat frame member of the wheelchair. Manual rotation of the lever in one direction effects narrowing of the wheelchair sufficiently to allow passage through restricted areas.

Abstract: An orthopedic chair for a physically impaired person is provided and consists of a seat, backrest, armrests, footrests and a tray that are readily adjustable in various attitudes to conform to the unique requirements of the physically impaired person. The chair also has casters and an adjustable rear handle so that the chair can be portable.