Abstract: An electrical wheelchair includes a chassis to which a frame is pivotally mounted. Two casters are rotatably mounted to the frame. At least a resilient member is arranged between the frame and the chassis for supporting the relative position of the frame with respect to the chassis. The resilient member can be deformed to change the relative position of the frame with respect to the chassis to allow the wheelchair to climb over raised surfaces of different heights. The deformation of the resilient member also stores energy therein which may be released when the wheelchair is about to reach the raised surface for enhancing the wheelchair to move over the raised surface. Further, the resilient member also functions to absorb shock caused by the wheelchair moving down a step-like raised surface.

Abstract: A miracle curb climber includes a casing having a top connecting bolt for screwing to a front or a rear axle of a walking aid, such as a handcart, a wheelchair, an electric wheelchair, a wheeled power chair, etc., at least one front pilot wheel and at least one main land-contacting wheel mounted into front and rear end of the casing, respectively, and at least one relaying wheel mounted in the casing between the pilot wheel and the land-contacting wheel. The front pilot wheel and the relaying wheel have diameters smaller than that of the main land-contacting wheel and are suspended in the air in front of the main land-contacting wheel, enabling the main land-contacting wheel to smoothly climb up a raised obstacle, such as a curb or a threshold, at a reduced angle of climbing without causing violent vibration or sway of the walking aid.

Abstract: A traveling device such as, for example, a wheelchair or a resource carrier enabling comfortable travel on uneven ground, with its wheels moving in conformity with the ground, having a simple construction which can be manufactured at low price. The device includes a truck member with a loop frame and a body member which is supported on the truck member by a pair of links at its front and by a pair of fixed arms at its rear. The loop frame has a pair of side frame parts each of which is bendable at its lengthwise center and supported by a driven wheel at the same, and a pair of front and rear frame parts each of which is supported by a caster at the lengthwise center. Each fixed arm has an upper end fixed immovably to the body member and a lower end which is connected turnably and movably generally parallel to the traveling direction.

Abstract: A walker includes a frame with downwardly extending front and rear legs. An obstacle traversing wheel assembly is disposed at the lower end of each front leg, and a wheel having a brake that is engaged by a downward force on the walker frame is disposed at the lower end of each rear leg. The obstacle traversing wheel assembly is arranged with a primary wheel that is rotatable about a central axis. At least four secondary wheels of equal diameter, but smaller than the primary wheel, are arranged at fixed locations around the circumference of the primary wheel. The secondary wheels are arranged to freely rotate independently of each other and of the primary wheel.

Abstract: Improvements to personal vehicles including self-propelled and balancing personal vehicles. Ready detachability of a seat, footrest, seat back, control unit, wheels and caster assembly is provided using quick disconnect mechanisms.

Abstract: A portable load transporting dolly having a mechanism manually operable for selectively ascending or descending steps is shown. The dolly has generally cross-shaped wheels and a pivotal driving lever is located at its handle. A cable couples the pivotal driving lever to the rotating shaft of the cross-shaped wheels through a plurality of pulleys and ratchet gears such that the wheels may be rotated easily by gripping the lever. The radial arms of the cross-shaped wheels have sliding reciprocative rods which react with the steps of the staircase to enhance the climbing action of the dolly on the staircase.

Abstract: A sack trolley (1) comprises a support frame (2) presenting a lower pair of carrying wheels (4) and a hoist mechanism (6) for climbing steps, which comprises a lifting arm (10) equipped with support rollers at its free end and which can be swivelled about a swivelling axis (S) parallel to the carrying wheel axis (L) by means of a crank drive (8). In order to achieve step-climbing assistance which is simple, space-saving, easy to handle and functionally safe, the lifting arm (10) is comprised of a swing guide component (11) swivel-mounted about the swivel axis (S) and a support component (12) taking up the support rollers (13) and longitudinally displaceable compared to the swivel guide component (11), whereby the crank drive (8) is articulated on the support component (12) with its crank arm (9).

Abstract: An obstacle traversing wheel assembly that rolls easily without dragging over electrical cords, trash and debris includes a primary wheel that is journaled on an axle which is attached to a load carrying frame. At least four independently rotatable secondary wheels are mounted around the circumference of the primary wheel at locations equidistant from each other and from the primary wheel axle. The secondary wheels are all of the same diameter and are spaced apart on the primary wheel at a distance that is less than the diameter of a secondary wheel. The wheel assembly finds use as the wheel members on luggage, as the leading wheel of an in-line skate board, and for supporting any other load carrying module that is rolled across a debris-strewn surface.

Abstract: A motor-driven stair climbing device (10) to carry equipment and goods, more particularly wheel chairs (9) with disabled persons. The wheel chair (9) can be detachably fixed to the stair climber (10) and essentially comprises a stable frame (101) with an energy source (8.1, 8.2), a drive shaft (18), a drive control, feelers (7,131,132), sensors (7) and a lifting mechanism to climb the steps. The stair climbing device is characterized in that a support device (30, 33) is provided, which is supported on the following step of the stairs (1.2, 1.3) and in that the entire center of gravity (5) of the stair climber (10), the wheeler chair (9) and the disabled person is located between the support points of the running wheel (12) or the support device (30, 330) on the steps of the stairs (1.1, 1.2, 1.3).

Abstract: A suspension arrangement for a wheeled conveyance, the suspension arrangement including a mounting member, at least two pairs of wheels and a biasing structure, the mounting member supporting thereon in an operable manner the pairs of wheels, the biasing structure acting between the mounting member and a remote point so as to cause the mounting member to pivot about a pivot point provided thereon and through which the mounting member is joined to the remainder of the conveyance.

Abstract: The present invention configures a pushcart, in particular a baggage cart such as is used in airports, for ease of maneuverability in negotiating an escalator stairway. The cart is fitted with a front wheel assembly and pivotable rear wheel assemblies, as well as with drop-attenuating mechanisms fitted to each wheel assembly. The rear wheel assemblies each include a reverse-releasable, pivoting-lock mechanism. The drop attenuating mechanisms function when the pivotable wheel assemblies are locked in the pushcart advancing direction, and include damped-swing traction members for establishing adhesive friction in contacting the treads of a sloping escalator stairway. The traction members bear the pushcart through a damped swing if the wheel assemblies are not riding on the treads of the escalator steps.

Abstract: A motorized vehicle capable of fault detection and of operation after a fault has been detected. The vehicle has a plurality of control components coupled to a motorized drive and a comparator for comparing the output of each of the control components with outputs of other control components so that failures may be identified. The vehicle may have multiple processors coupled to a plurality of control channels by means of a bus and a decision arrangement that suppresses the output of any processor for which a failure has been identified.

Abstract: A wheeled cart for transporting various size massage tables from one place to another which includes an elongated base frame having a front end and an opposite end and a pair of spaced-apart side members defining a storage cavity inbetween and separated by several braces on which a massage table is intended to rest. The front end of the base frame includes a cross-member having a cushion element and the rear end of the base frame includes a U-shaped end intended to capture and retain the rear end of the massage table while the opposite or front end of the massage table bears against the cushion element as it rests on the braces between the side members. A U-shaped handle is pivotally attached on the front end of the base frame. A pair of handle side rods interconnect the U-shaped handle with the pivot connections to the base frame. The handle further includes a cushion member which is intended to bear against the rear end of the massage table.