| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 280500200 | STEP OR ABUTMENT ASCENDING TYPE VEHICLE | 52 |
| 20090194955 | VEHICLE WITH TWO PARALLEL WHEELS - A vehicle with two parallel wheels according to the invention has split steps ( | 08-06-2009 |
| 20100013172 | OBSTACLE TRAVERSING WHEELCHAIR - 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. | 01-21-2010 |
| 20100096816 | ASSISTANT APPARATUS FOR SURMOUNTING BARRIER - The present invention provides an assistant apparatus for surmounting a barrier, which comprises a carrier body, an assistant mechanism, and a sensing/driving apparatus. The assistant mechanism, disposed at a side of the carrier body, having an assistant block disposed at the end thereof, functions to place the assistant block on the ground between the carrier body and the barrier so that the carrier body is capable of surmounting the barrier through the assistance of the assistant block. The sensing/driving apparatus, coupled to the assistant mechanism, functions to drive the assistant mechanism to generate the adjusting movement according to whether the barrier is detected or not. By means of the design of the present invention, the assistant block is adopted to reduce the height surmounted by the carrier each time so that the carrier is capable of surmounting the barrier section by section. | 04-22-2010 |
| 20110127732 | Stair Climbing Wheel with Multiple Configurations - A stair climbing wheel and vehicles are described. The stair climbing wheel has a rolling wheel and a plurality of deployable protrusions that allow the wheel to climb stairs. The deployable protrusions can be deployed from or retracted into the rolling wheel. In the retracted position, the stair climbing wheel functions as a traditional circular wheel. These stair climbing wheels can be incorporated on a wide variety of vehicles, such as hand trucks, wheelchairs, and personal transports to allow these vehicles to climb stairs. | 06-02-2011 |
| 20110215540 | VEHICLE WITH CENTRAL WHEEL DRIVE, IN PARTICULAR A WHEELCHAIR OR STAND-UP WHEELCHAIR - The vehicle, for example a stand-up wheelchair, comprises a frame ( | 09-08-2011 |
| 20110260417 | STAIR-CLIMBING DEVICE - A stair-climbing device including a support unit, a climbing unit driven by a motor and a control unit for controlling operation of the climbing unit, wherein a detection unit is provided for detecting the current position of the support unit with respect to one or several steps of a stair which includes at least one non-contact sensor, wherein the detection unit provides signals to the control unit, which signals contain information about the current position of the support unit with respect to one or several steps of the stair, and wherein the control unit is adapted to control operation of the climbing unit depending on signals of the detection unit. | 10-27-2011 |
| 20120175850 | Wheelchair Attachments - 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 belt support frame, at least two rollers mounted on the belt support frame and a belt mounted around the at least two rollers. The belt support frame is adapted for mounting on the frame of the wheelchair such that as the wheelchair descends from the upper surface to the lower surface, the belt engages an edge of the upper surface and rolls around the at least two rollers slowing a descent of the wheelchair from the upper surface to the lower surface. | 07-12-2012 |
| 20120280462 | HAND TRUCK BRAKE - The hand truck brake provides automatic braking for a hand truck as it negotiates a stairway or other uneven surface. The brake is adaptable to various types of hand trucks, including powered stair-climbing trucks. The brake includes two major assemblies. The first is a reciprocating plunger having a distal roller that travels along the surface. When the roller travels over the nose of a stairway tread, the plunger extends to actuate the brake. The second major assembly is a rotary cam rotated by the plunger as it extends. The cam has an extension and a brake shoe, the brake shoe engaging the underlying surface to stop the hand truck when the cam is rotated to its brake-engaging position. The assembly automatically retracts when the hand truck is oriented vertically. Additional controls are provided for the operator to extend or retract the brake mechanism. | 11-08-2012 |
| 20130207354 | APPARATUS FOR MOVING A NON-AMBULATORY INDIVIDUAL UP AND DOWN STEPS - An apparatus for transporting a non-ambulatory individual up and down steps includes a seat for the non-ambulatory individual, two front wheels and two larger back wheels positioned under the seat. The apparatus can be used to move up steps through an operator by tilting the apparatus back and moving the apparatus such that the large rear wheels roll towards the steps. When descending steps, the seated occupant can be lowered through successive steps to a lower floor or incorporated landing by tilting the apparatus and moving the rear wheels down the steps. The apparatus includes extension rods which may be extended to stabilize the apparatus while moving up or down steps. | 08-15-2013 |
| 20160114843 | MOBILE ROBOT - A mobile robot configured to be widely versatile in its use. For example, the mobile robot can be configured for being used on a wide assortment of surfaces, regardless of the orientation and/or shape of the surfaces. Alternatively or in combination, the mobile robot can be configured for effective and efficient movement on the surfaces it traverses. In some cases, the mobile robot is configured with two or more component units. In some cases, the component units are configured with magnets and a control system for orientating the magnets. In some cases, one or more component couplings join the component units. In some cases, the mobile unit is configured with Mecanum wheels. | 04-28-2016 |
| 20160159383 | CARRIAGE CART WITH OBSTACLE OVERCOMING - The invention relates to a carriage cart, which comprises a chassis frame with a front end and a rear end; a pair of front wheels mounted on the front end of the chassis frame; a pair of rear wheels mounted on the rear end of the chassis frame. The carriage cart according to example embodiments of the present invention may improve the performance of obstacle overcoming for robotic system. | 06-09-2016 |
| 280500220 | With endless track | 10 |
| 20080296853 | Stair assist robot mechanism and method - A mobile robot with a chassis including one or more drive mechanisms and at least a first arm pivotably connected to the chassis and configured to pitch up and down. A ski structure is attached on an underside of the first arm for raising the chassis as the arm is pitched down so the drive mechanisms can traverse a riser in the path of the chassis. | 12-04-2008 |
| 20090230638 | STAIR CHAIR - The present invention relates to a chair configured for transporting a subject (e.g., up or down an elevated surface (e.g., a stairway, a curb, a ramp, etc.)) and methods of using the same. In particular, the present invention provides a chair comprising a rail assembly, a pair of back legs and a pair of front legs, wherein the rail assembly is fastened to the back legs and wherein the back legs and front legs are interconnected via a pair of side rails and a seat assembly, wherein the seat assembly comprises a seat frame and a swivel seat assembly, and methods of using the same (e.g., to load and/or unload a subject onto the chair and/or to transport a subject). | 09-17-2009 |
| 20100117312 | MOTORIZED SLED FOR STAIR CHAIRS - A lightweight motorized and tracked sled for attachment to a variety of stair chairs is described. A power supply or power source provides power to a motor driving a track configured to engage a set of stairs. The motor and track can lift and support the stair chair and a patient thereon up or down one or more flights of stairs. The track driven by the motor has a length sufficient to simultaneously engage the lips or edges of a pair of sequential steps, but may be otherwise limited in length to reduce the weight of the track. To ensure that the sled and attached stair chair are stably supported while ascending or descending stairs, the sled may have rails, skis, or passive tracks having a length sufficient to ensure that the rails, skis, or passive tracks are always over the edge or lip of no fewer than two steps. | 05-13-2010 |
| 20110115173 | Baby Evacuation Device - The invention provides an evacuation device for one operator, with a plurality of babies secured in pockets, having their heads secured in adjustable cushioned head rests which are attached to a patient support membrane, to descend a stairwell safely and quickly during an emergency. The invention is constructed of a tubular frame, covered with a fire-retardant, water impermeable and mold and fungus resistant material. The invention incorporates a set of casters for transport across a horizontal plane, such as crowded hallways and small hospital stairwell landings. The dual track system permits the operator to glide down the stairs in a safe, smooth and controlled fashion. The dual braking device on the track system assists the operator in a stairwell descent and permits the operator to release the chair and remove any debris that may be in the path of evacuation. | 05-19-2011 |
| 20110175302 | Manually Propelled Vehicle with Continuous Track - A manually propelled vehicle ( | 07-21-2011 |
| 20110254237 | Wheelchair Stair Assist Apparatus - An apparatus is disclosed for use on standard or customized wheelchairs for moving the wheelchair and wheelchair occupant up or down a stairway or stairway-like structure (e.g., a curb) with greater confidence and stability to the occupant of the wheelchair and its handler(s). The apparatus includes a motorized assembly that interacts with stair steps when the apparatus and wheelchair are tilted backwardly. The motorized assembly allows the wheelchair to glide or move up or down the steps without experiencing the bumps commonly associated with rolling a wheelchair up or down a set of stairs. The apparatus includes a headrest to provide comfort to the occupant during operation and includes pivoting handlebars to allow the operator of the wheelchair to control the movement of the wheelchair. The apparatus is mountable to, and removable from (when not in use), the wheelchair. The apparatus can he considered as a retrofit. | 10-20-2011 |
| 20120139197 | Multi function patient transport - A transport that is manually powered for transporting an injured or disabled person from one location to another. The chair is particularly useful for transporting an injured or disabled person (who is of a heavy weight) up or down a flight of stairs. The chair lift is manually driven by reciprocating hand levers operated by an attendant. A ratchet and pawl mechanism in combination with a brake system, which is continuously set/locked, allows movement of the chair only when the chair is being propelled up a flight of stairs and when an attendant purposefully actuates a hand lever to release the brakes and allow movement of the transporter. | 06-07-2012 |
| 20130175770 | Evacuation Chair - An evacuation chair is disclosed for evacuating a person down stairs and along level ground. The evacuation chair has a frame and at least one front wheel and at least two rear wheels attached and rotatable with respect to the frame to allow the chair to be wheeled along level ground. The evacuation chair also has two rail assemblies attached with respect to the frame, each rail assembly extending rearwardly and upwardly from a forward end of the rail assembly to a rearward end thereof, the rail assemblies being provided for guiding the movement of the evacuation chair on stairs. A clear space is provided extending throughout a legroom region between the rail assemblies from the rearward ends thereof to at least halfway towards the forward ends thereof, to accommodate the movement of the legs of the operator. The rail assemblies have a belt for movement around the rail assembly, to bear between the stairs and the rail assembly. The belt has an inner surface for bearing against the rail assembly, an outer surface, and a maximum lateral width Wm. The outer surface of the belt includes an outer contact region for contacting the stairs, the outer contact region having a lateral width W. such that the ratio W | 07-11-2013 |
| 20140084553 | COLLAPSIBLE MOTORIZED STAIR CHAIR - A motorized stair chair for transporting a human subject having a chair frame having front and rear sections; a collapsible seating assembly attached to the front section of the chair frame; ground-contacting wheels coupled to the chair frame; a motor coupled to the chair frame; a removable battery configured to power the motor and the motorized stair chair, wherein the battery and the motor are separately coupled at different locations on the chair frame; and a pair of motorized continuous, rotatable tracks frame; responsive to the motor, the tracks being integrally and pivotally coupled to the rear section of the chair frame, wherein the motorized tracks are configured to engage stairs. | 03-27-2014 |
| 20190144054 | Stair-climbing remote control utility wagon | 05-16-2019 |
| 280500240 | With skid or rollerway | 5 |
| 20150329134 | CARRIER WITH STAIR CLIMBING AID AND STAIR CLIMBING AID FOR A CARRIER - A carrier with a stair climbing aid includes a carrier including a top surface, a bottom surface, and a front surface and a rear surface between the top surface and the bottom surface, at least one guide bar attached to the rear surface, the guide bar having a first end disposed proximate a corner between the bottom surface and the rear surface and a second end at least as high as stair risers of stairs expected to be climbed, at least one elongated member movably attached to the guide bar, and an arrangement for urging a top end of the elongated, member toward the second end of the guide bar. | 11-19-2015 |
| 20160101795 | LUGGAGE SLIDERS - The luggage sliders include various embodiments for permanent or removable installation upon the underside of a roll-around suitcase, wheeled cart, or similar article to facilitate movement of the article up a flight of stairs or other stepped inclined surface. Some of the sliders are pivotally extendible and retractable. Others are telescopically extendible and retractable. Still others are pivotally attached to one edge of the article, and pivotally fold against a surface of the article for storage. Still others may be adjustably clamped about the base of the article. Still others are pivotally attached about a wheel axle to rotate and lie beneath the wheel for operation. Still others may be removably attached directly to the wheels of the luggage, cart, or other wheeled article. Still others are pivotally attached to a point on the luggage and telescopically extend to project below the wheel for use. | 04-14-2016 |
| 20160101796 | LUGGAGE SLIDERS - The luggage sliders include various embodiments for permanent or removable installation upon the underside of a roll-around suitcase, wheeled cart, or similar article to facilitate movement of the article up a flight of stairs or other stepped inclined surface. Some of the sliders are pivotally extendible and retractable. Others are telescopically extendible and retractable. Still others are pivotally attached to one edge of the article, and pivotally fold against a surface of the article for storage. Still others may be adjustably clamped about the base of the article. Still others are pivotally attached about a wheel axle to rotate and lie beneath the wheel for operation. Still others may be removably attached directly to the wheels of the luggage, cart, or other wheeled article. Still others are pivotally attached to a point on the luggage and telescopically extend to project below the wheel for use. | 04-14-2016 |
| 20160101798 | LUGGAGE SLIDERS - The luggage sliders include various embodiments for permanent or removable installation upon the underside of a roll-around suitcase, wheeled cart, or similar article to facilitate movement of the article up a flight of stairs or other stepped inclined surface. Some of the sliders are pivotally extendible and retractable. Others are telescopically extendible and retractable. Still others are pivotally attached to one edge of the article, and pivotally fold against a surface of the article for storage. Still others may be adjustably clamped about the base of the article. Still others are pivotally attached about a wheel axle to rotate and lie beneath the wheel for operation. Still others may be removably attached directly to the wheels of the luggage, cart, or other wheeled article. Still others are pivotally attached to a point on the luggage and telescopically extend to project below the wheel for use. | 04-14-2016 |
| 20160101799 | LUGGAGE SLIDERS - The luggage sliders include various embodiments for permanent or removable installation upon the underside of a roll-around suitcase, wheeled cart, or similar article to facilitate movement of the article up a flight of stairs or other stepped inclined surface. Some of the sliders are pivotally extendible and retractable. Others are telescopically extendible and retractable. Still others are pivotally attached to one edge of the article, and pivotally fold against a surface of the article for storage. Still others may be adjustably clamped about the base of the article. Still others are pivotally attached about a wheel axle to rotate and lie beneath the wheel for operation. Still others may be removably attached directly to the wheels of the luggage, cart, or other wheeled article. Still others are pivotally attached to a point on the luggage and telescopically extend to project below the wheel for use. | 04-14-2016 |
| 280500260 | With spider-type engaging means | 3 |
| 20080265529 | Foldable spider wheel for ascending and descending stairs - A collapseable spider wheel assembly on a towing device enables storage of the device into a standard rectangular space. Once collapsed, the collapsible spider assembly is protected within the body of the towing device. Furthermore, actuation of the folding and unfolding may be accomplished through the usual telescoping of the carrying handle of such a device, such as in a suitcase embodiment. While the spider wheels are in the open position, the carrying apparatus may exert a drive force to climb up stairs and braking force to descend stairs. The unit operates as a normal wheeled carrying apparatus while traversing a horizontal surface. | 10-30-2008 |
| 20090309319 | Stairclimbing and Descending Hand Truck - A towing device comprising a power-assisted spider wheel assembly for ascending and descending stairwells is capable of avoiding unintentional back turning hazards that may result while descending shallower stairwells by applying torque alternatively in the climb-down and climb-up direction to the spider assembly responsive to the angle formed between the spider assembly and lower stair riser. This ensures that the unit will not suddenly fall to a lower tread, which results if the lower-leaning wheel is not first pinned against the lower inside riser and rolls forward instead. The torque exerting means may also lock said spider assembly in a fixed arbitrary orientation during ascent and descent to allow the spider assembly to achieve a safe orientation before stopping mid-stairwell increasing safety. | 12-17-2009 |
| 20130154207 | Apparatus, System and Method for a Load-Bearing Cart - A cart is configured to allow a user to gain mechanical advantage in moving a load up or down a step, a curb, a flight of stairs or other obstruction while at the same time allowing them to employ a conventional lifting motion in an improved ergonomic position. | 06-20-2013 |
| 280500280 | Relatively movable running gear portions | 17 |
| 20090091092 | WHEELCHAIR SUSPENSION - A wheelchair includes a pivoting drive assembly having a drive wheel, a motor drive connected to the drive wheel, and a first pivoting linkage fixedly attached to the motor drive. The pivoting drive assembly is pivotally coupled to a frame at a first frame pivot axis such that the drive wheel, motor drive, and first pivoting linkage pivot about the first frame pivot axis as a unit. The wheelchair further includes a second pivoting linkage and a front caster assembly. The second pivoting linkage is pivotally coupled to the frame at a second frame pivot axis. The first pivoting linkage is pivotally coupled to the front caster assembly at a first front caster pivot axis and the second pivoting linkage is pivotally coupled to the front caster assembly at a second front caster pivot axis. | 04-09-2009 |
| 20090212508 | Wheel Suspension - The present invention relates to a wheel suspension for mounting on a frame ( | 08-27-2009 |
| 20090278325 | Walking Aid Adapted For Mounting A Height Obstacle - The present invention relates to a walking aid adapted for mounting a height obstacle. The walking aid comprises a frame with a front and a back, and at least two rear wheels and at least one front wheel. The front wheel is supported by a front wheel carrier which is moveably connected to the frame for supporting the at least one front wheel such that it is moveable with respect to the frame between a lower forward position for supporting the frame on the surface and a higher backward position. The walking aid further comprises at least one temporarily forward support member provided at the front of the frame for supporting the frame on the surface when the at least one front wheel is in the higher backward position, which temporarily support member is connected to the frame such that the underside of the temporarily support member is at a distance from the support surface when the frame is supported by the at least one front wheel in the forward position. | 11-12-2009 |
| 20100001478 | Wheeled Platforms - A wheeled platform | 01-07-2010 |
| 20100032911 | Stair-Climbing Wheeled Vehicle - A wheeled vehicle comprising a power-driven spider assembly for ascending and descending stairs. The vehicle includes an angular position sensor providing input to a controller operable to control a servo-motor to effectively lock the position of the spider relative to the frame, regardless of the hand truck's spatial orientation relative to a vertical plane, or any balancing of the hand truck. The angular position sensor provides input to the controller, which is programmed with predefined angular zones of instability, and causes the controller to accelerate rotation of the spiders through those zones when the wheeled vehicle is in the descent mode, to avoid instability of the hand truck. A hand truck may include a removable basket and/or a pivotable platform usable to transport loads. | 02-11-2010 |
| 20100052270 | APPARATUS FOR TRANSPORTING AN INVALID - 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. | 03-04-2010 |
| 20120068423 | CASTER WHEEL ARRANGEMENTS - A caster wheel arrangement includes a base; a yoke rotatably mounted to the base via a kingpin; at least a first caster wheel rotatably mounted to the yoke; and an assist arrangement moveably mounted to the yoke. The assist arrangement facilitates travel of the caster wheel arrangement over a surface transition (e.g., a gap, a rise, etc.). Non-limiting example assist arrangements include a leading wheel, a leading variable radius wheel, a trailing wheel, a step member, and combinations thereof. | 03-22-2012 |
| 20120313335 | Vehicle Having a Level Compensation System - A vehicle having a multiple of level compensation systems is disclosed. The vehicle comprising a chassis having a left frame, a right frame and a base plate, a first level compensation system comprising a pivot joint for pivotably connecting the left and right frames to the base plate around a common rotational axis. A first axial distance from a left rotation axis of a left wheel pair to the rotational axis is different from at least one second axial distance from a right rotation axis of a right wheel pair to the rotational axis, such that the left and right wheel pair have at least one off-set to each other. Moreover a method for traversing stairs with such vehicle is disclosed. | 12-13-2012 |
| 20130214498 | Wheeled Platforms - A wheeled platform | 08-22-2013 |
| 20140070502 | MOBILE RECONNAISSANCE APPARATUS WITH ARTICULATING TRACTION CONTROL - A mobile apparatus has a first articulating section comprising a leading traction control assembly including multiple points of contact inclined at a forward angle, and a second articulating section comprising an intermediate traction control assembly. A propulsion system is configured to coordinate movement of the leading traction control assembly and the intermediate traction control assembly. A connector operatively couples the first articulating section to the second articulating section, and the first articulating section is configured to articulate relative to the second articulating section in response to one or more of the multiple points of contact of the leading traction control assembly coming into contact with an obstacle. A bias assembly is configured to exert a continuous compression force against one or both of the first articulating section and the second articulating section to maximize the number of points of contact between the mobile apparatus and the obstacle. | 03-13-2014 |
| 20140175762 | Vehicle Having a Level Compensation System - A vehicle having a multiple of level compensation systems is disclosed. The vehicle comprising a chassis having a left frame, a right frame and a base plate, a first level compensation system comprising a pivot joint for pivotably connecting the left and right frames to the base plate around a common rotational axis. A first axial distance from a left rotation axis of a left wheel pair to the rotational axis is different from at least one second axial distance from a right rotation axis of a right wheel pair to the rotational axis, such that the left and right wheel pair have at least one off-set to each other. Moreover a method for traversing stairs with such vehicle is disclosed. | 06-26-2014 |
| 20140265171 | Gear system to assist with transportation on uneven ground and stairs - A gear system to assist with transportation on uneven ground and stairs comprising three or more axle systems with outer gears that all mesh with inner gears so that the axle systems, which are supported at either end by a triangle bracket secured by bushings, turn in the same direction. When attached to a vehicle traveling on a flat surface, the gear system has one axle system in the air and two axle systems on the ground, forming a triangle. When the vehicle drives forward, if the axle system on the ground in the front encounters any unevenness, such as rocks or stairs, the entire gear system will rotate toward the front around the axle that is through the inner gear, as the vehicle continues to move forward throughout the rotation. This prevents any uneasy movements and allows the vehicle to fluidly traverse uneven ground or climb stairs. | 09-18-2014 |
| 20150061239 | TWO-WHEELED TROLLEYS - The handling properties of two-wheeled trolleys may be materially improved by arranging for the freely rotatable wheels ( | 03-05-2015 |
| 20150061240 | STAIR CLIMBING VEHICLE - A stair climbing vehicle that is able to stably climb stairs is provided. In order to keep the balance of the stair climbing vehicle at the time of climbing the stairs, the ratio between a gravity center moving control gain for the stair climbing vehicle and a turning control gain for first wheels and second wheels is changed by controlling the rotation of a first motor of each first turning actuator. Thus, it is possible to slightly turn the first wheels and the second wheels based on the posture of an occupant seated on the stair climbing vehicle when the occupant climbs the stairs with the stair climbing vehicle, thereby preventing the posture of the occupant from being unstable. Thus, the stair climbing vehicle is able to stably climb the stairs. | 03-05-2015 |
| 20160046310 | DRIVING ASSIST UNIT OF TRUCK - A driving assist unit of a truck for assisting a driving force applied to the truck by a worker includes a unit body connected to the truck, the unit body being turnable with respect to the truck, an operation portion provided on the unit body, the operation portion being configured to input a driving force to the truck through the unit body by being pressed by the worker, a driving wheel provided on the unit body, the driving wheel being rotatable in a longitudinal direction of the unit body, an assist force according to the operation of the operation portion being applied to the driving wheel, a lower engagement mechanism configured to be engaged with a connecting rod, the connecting being provided protruding to an outside from the truck and perpendicularly with respect to a ground, the lower engagement mechanism being slidable in an axial direction with respect to the connecting rod, and an upper engagement mechanism provided above the lower engagement mechanism and configured to be engaged with the connecting rod, the upper engagement mechanism being slidable in the axial direction with respect to the connecting rod. | 02-18-2016 |
| 20160090115 | SYSTEM ASSISTING THE MOVEMENT ON STEEP SURFACES - The system assisting the movement on steep surfaces provided with a cam mechanism is characterized in that the cam mechanism ( | 03-31-2016 |
| 20180021193 | WHEELCHAIR CLIMB SYSTEMS AND ASSEMBLIES | 01-25-2018 |
| 280500300 | Jack-type attachment (i.e., elevating) | 4 |
| 20080231005 | Wheel chair - A curb-climbing vehicle with a pair of front wheels has a lifting device attached to each wheel, which engages the curb edge, and raises the wheel so that it can engage and roll up over the curb. A wheelchair embodiment incorporates user support elements that are adjustably secured to central ‘spine’ elements, enabling the chair structure to be adjusted to the person of the individual user, including possible asymmetric adjustments. The chair running gear includes larger driving wheels, centrally located, and fore and aft independently suspended castoring wheels. | 09-25-2008 |
| 20090267310 | WHEELCHAIR LIFT ASSIST DEVICE - This invention relates to a wheelchair lift extension device comprising an extension, a bar, which connects to the bottom frame of a wheelchair and when pressure is applied to the opposite end of the bar, it assists in raising the wheelchair over thresholds and curbs. The extension bar includes a first horizontal section, a vertical section having a first end attached to the first horizontal section and a second end extending downwardly from the first horizontal section. A second horizontal section is attached to the second end of the vertical section. | 10-29-2009 |
| 20120286483 | HAND TRUCK WITH LIFTING MECHANISM - A hand truck with a lifting mechanism has a frame having a handle portion, and a load-carrying portion. An axle is supported by the frame and has wheels rotatably mounted to opposed ends of the axle. An extendible member is pivotally mounted to the axle. The extendible member comprises a housing and an extendible portion that extends from the housing. The extendible portion has an engagement end, the engagement end retracting within an outer perimeter of the wheels in a retracted position, and extending outward to engage a ground surface. In the extended position, the extendible member has a length that is greater than a diameter of the wheels. A control mechanism selectively extends and retracts the extendible portion. | 11-15-2012 |
| 20160067122 | WHEELCHAIR CURB-CLIMBING AND CURB-DESCENDING SYSTEM - A wheelchair curb-climbing and curb-descending system for aiding a wheelchair to negotiate a curb. The system includes a wheelchair attachment mechanism; a pair of front arms adapted to extend to lift a front portion of wheelchair and to retract back to lower the front portion of the wheelchair; a pair of rear arms adapted to extend to lift a rear portion of wheelchair and to retract back to lower the rear portion of the wheelchair. The system further includes an arm extending mechanism for extending/retracting the arms; a rotatable lifting-arm wheel at free ends of each arm; a wheel motor for rotating the arm wheels; an operation control unit; and a leveling mechanism for ensuring the seat of the wheelchair remains substantially level to the ground during operation of the system. | 03-10-2016 |
| 280500320 | Fulcrum attachment | 2 |
| 20080238003 | Safety System for a Conveyance Mechanism - A vehicle for overcoming an obstacle that comprises a carriage and a translator. The translator comprises a translator member rotatably connected to the carriage and at least three wheels rotatably connected to the translator member. The three wheels have a coplanar, same orientation and substantially equilaterally triangular relation to each other for reducing resistance from the obstacle to the overcoming vehicle. A pulling force by the operator rotates the translator member and the third wheel joins the second wheel as both are biased against the same vertical second surface of the first stair. A still further pulling force by the operator rotates the translator member more so that the third wheel rolls over a corner of the first stair onto a horizontal third surface of the first stair while the second wheel still contacts the vertical second surface of the first stair. | 10-02-2008 |
| 20110140377 | WHEEL SYSTEM WITH LIFTER APPARATUS - A wheel system includes a frame, a wheel rotatably mounted to the frame, and a lifter. The lifter defines a first end and a second end. The first end of the lifter is pivotably mounted to the frame, and the second end of the lifter defines a contact surface. The contact surface of the lifter is adapted to establish initial contact with a vertically disposed obstacle, and thereafter the lifter is configured to pivot about the first end such that the wheel is lifted and translated over the vertical obstacle. | 06-16-2011 |
