Abstract: Embodiments herein are directed to a mobility device. The mobility device includes a frame, a pair of foot plates, and a base. The frame has a pair of side rails. The pair of foot plates are pivotally attached to the pair of side rails. Each of the pair of foot plates have a transport surface. The base has an upper surface and an opposite lower surface. The lower surface of the base includes at least one receiving cavity that corresponds to a shape of the pair of foot plates. The base is positioned on the transport surface to receive the pair of foot plates within the at least one receiving cavity and is configured to receive a plurality of cargo containers on the upper surface.

Abstract: A multi-therapeutic patient lift and parallel bars system is disclosed. The multi-therapeutic patient lift and parallel bars system includes a patient lift system that is built into parallel bars, to lift patients who cannot stand. This multi-therapeutic patient lift and parallel bars system combines several devices together, for more room, convenience, decreased clutter, and more available storage with increased ease of moving patients around in an area that could already be crowded.

Abstract: Provided is a wheelchair that can be operated easily with either a right or left hand. The wheelchair is provided with; right and left handrims; a rotary shaft for transmitting a rotational force generated by a handrim on one side to a wheel on the opposite side via a drive mechanism; and a wheel hub for transmitting the rotational force generated by the handrim on the one side to the wheel on the same side via the drive mechanism, wherein the drive mechanism includes two pairs of right and left sensors respectively disposed on an outer surface of each of the handrims, a first non-excitation electromagnetic clutch for transmitting the rotational force to the right wheel, a second non-excitation electromagnetic clutch for transmitting the rotational force to the wheel on the opposite side, and a third non-excitation electromagnetic clutch for transmitting the rotational force to the left wheel.

Abstract: Provided is a lightweight and inexpensive wheelchair that can be easily operated with either a right or left hand. The wheelchair according to the present invention is provided with; a pair of handrims having a first portion and a second portion; a drive mechanism for transmitting a first rotational force generated by the first portion on one side to a wheel on another side, and for transmitting a second rotational force generated by the first portion on the other side to a wheel on the one side, wherein the drive mechanism includes an axle on the one side, an axle on the other side connected to the axle on the one side via a rotary shaft, a first two-way clutch located on the axle on the one side, and a second two-way clutch located on the axle on the other side.

Abstract: A bodyweight unloading locomotive device includes a frame configured to support locomotive movement, and an unloading assembly carried by the frame. The unloading assembly includes a spring having a fixed end coupled to the frame and an opposed free end, a cam assembly mounted to the frame for rotational movement, a first tether extending from the free end of the spring to the cam assembly, and a second tether extending from the cam assembly to a load. The unloading assembly exerts an unloading force on the load with respect to the frame.

Abstract: A system and method for differential traction drive and steering axis coordination for an autonomous mower or other turf device includes initiating a steering motion based on determining a target forward speed and a steering rotational speed, calculating a left wheel speed and a right wheel speed, and applying the left and right wheel speeds, wherein the steering rotational speed is driven by a steering motor and the traction wheels associated with the autonomous mower, and the left and right wheel speeds are based on the target forward speed, a distance from a steering axle to the center of the respective wheel, and the steering rotational speed.

Abstract: Provided is a lightweight and inexpensive wheelchair that can be easily operated with either a right or left hand. The wheelchair according to the present invention is provided with; a pair of handrims having a first portion connected to each handrim spoke and a second portion connected to a base of each wheel; a drive mechanism for transmitting a first rotational force generated by the first portion on one side and/or another side to the wheel on the one side and the wheel on the other side, wherein the drive mechanism includes an axle on the one side, an axle on the other side connected to the axle on the one side via a rotary shaft, a first two-way clutch located on the axle on the one side, and a second two-way clutch located on the axle on the other side.

Abstract: A pedal lifting and angle adjusting mechanism includes an upper fixing block, a first push rod and a second push rod. The upper fixing block is fixed to a front end of a wheelchair frame. The first push rod includes a first housing. The second push rod includes a second housing. Both an upper end of the second housing and the first housing are hinged and fixed to the upper fixing block. A first push tube of the first push rod is hinged and fixed to a part deviating from the upper end of the second housing. A pedal is fixed to a second push tube of the second push rod. The first push rod is inclined. A hinged part of the first housing and the upper fixing block is located on a rear side of a hinged part of the first push tube and the second housing.

Abstract: A quadriplegic and paraplegic patient hydrotherapy standing support immersion apparatus that includes a first vertical support frame and a second vertical support frame disposed atop a base frame, said first and second vertical support frames connectable around a patient disposed upstanding therein, wherein a leg support conformably engages against said patient's legs proximal said patient's knees, a sternal support conformally engages against the chest of said patient, a posterior support member ergonomically engages against the length of said patient's back, and a shoulder support member engages an arched portion over each of said patient's shoulders and a breast support portion against the upper breast of said patient, whereby said patient is supportable maintained upstanding for immersion in a water body and thereby subject to therapeutic benefits of hydrotherapy and other physical therapy to resist muscle deterioration and problems of inhibited circulation resultant is from maintaining a supine posture f

Abstract: A manual wheelchair including a collapsible frame having a first lateral member that is connected to first and second braces at their respective first ends. A drive wheel axel extends along a first axis of rotation and engages a drive wheel, the first brace, and a portion of a transmission. A push rim axel extends along a second axis of rotation and engages a push rim wheel, the second brace, and a portion of the transmission, which transmits rotation of the push rim to rotation of the drive wheel. The collapsible frame additionally includes a second lateral member that is connected to the first and second braces as their respective second ends. The first and second braces are configured to release the second lateral member to collapse the manual wheelchair.

Abstract: A wheelchair accessible cycle that can be driven on a surface and operated from a wheelchair. The wheelchair accessible cycle comprising a frame and a platform. The frame has a front portion with a first wheel and a rear portion with second and third wheels. The platform is disposed laterally between the second and the third wheels and longitudinally between the front and rear portions of the frame. The platform is configurable to transport the wheelchair and pivotally moveable between a tilted position, where a free edge of the platform is in contact with the surface for rollably receiving the wheelchair, and a horizontal position, where the platform is generally horizontal and the wheelchair is adjacent to the front portion of the frame when the wheelchair is loaded onto the platform.

Abstract: A hand-powered vehicle is provided for transportation and entertainment purposes. The vehicle has a frame supporting a pair of side wheels that are driven by the user. The frame includes a front portion and a pair of side portions extending rearwardly to the side wheels. The side portions of the frame do not extend rearwardly past the side wheels. The user sits on a seat that is supported by a portion of the frame extending rearwardly from the front portion and between the two side wheels. A third wheel is provided under or behind the seat, and that wheel is preferably a caster that is coupled to the frame at an angle to a vertical axis. The side wheels have hand grips extending therefrom, and the hand-powered vehicle is configured to be propelled by a user applying a force through the hand grips to rotate the side wheels.

Abstract: There is provided a walker apparatus having a pair of spaced-apart, upright frame members. The walker apparatus includes a seat operatively connected to the upright frame members. The walker apparatus has a backrest cantilevered from the frame members. The backrest has at least one opening extending therethrough for permitting a user's vision past the backrest when the user grips the upright frame members.

Abstract: A wheelchair suspension comprises a frame, at least one pivot arm, at least one front caster, at least one rear caster, a stabilizing system, and a sensor. The pivot arm is coupled to the frame. The front caster is coupled to the pivot arm. The rear caster is coupled to the frame. The stabilizing system is coupled to the frame and the pivot arm. The sensor is arranged such that tipping of the frame causes actuation of the stabilizing system to at least partially resist further movement of the frame.

Abstract: A multi-function exercise machine for exercising the upper, middle and lower body from a seated position including pull down, leg press, and forward and rearward wheel exercise regimens, all with adjustable resistance and weight capabilities, for exercising specific targeted muscle groups.

Abstract: A collapsible wheelchair (CW) may be relatively small and lightweight and may be adapted to be easily collapsed/folded into a callable faint, allowing for easy storage, transport and use. The CW may be adapted to be collapsed/folded and expanded/unfolded in a series of simple steps, executable with one hand, by a person in a seated position, allowing for independent use even by a user with limited physical capabilities. The CW may have a relatively small width, allowing for access into constricted spaces. The rear and interior space between its large wheels may be unobstructed, leaving an unobstructed inner width, allowing the CW to be maneuvered in reverse over standing objects, such as a standard toilet. The seat of the CW may be equipped with a trap door, to allow the use of a toilet while seated on the CW. The rim may be beneath the seat for cleanliness.

Abstract: The present invention relates to a novel approach to improving the use of wheelchairs by offering the ability for the wheelchair to transition between accommodation for a seated position, and accommodation for a standing position, more particularly, wherein the inventive mobile manual standing wheelchair allows for a standing position during the course of mobile use, and which also permits the user to traverse narrow entrances and doorframes, and also allows the user to have improved access in front for elevated surfaces such as countertops and the like.

Abstract: Because sidewalks are slanted for rain run-off, they pose a safety risk for baby strollers if the person pushing the stroller stops and doesn't apply the brake. If s/he releases the stroller's handle when the brake is not applied, the stroller may veer off towards the curb owing to gravity, wind, the baby's movements, traffic vibrations, etc. Not applying the brake when stopped is a common mistake. While parents may remember to apply the brake when stopped, other caregivers may not. Applicant's improvement provides fully automatic slip-clutch joining means to inhibit veering off by automatically coupling the stroller's rear wheels together when the stroller is stopped. When coupled, the rear wheels must rotate in unison thus helping to prevent the stroller from veering-off toward the curb. When the stroller is being pushed the slip clutch handily becomes disengaged by turning or making other course adjustments.

Abstract: The present invention relates to a novel approach to improving the use of wheelchairs by offering the ability for the wheelchair to transition between accommodation for a seated position, and accommodation for a standing position, more particularly, wherein the inventive mobile manual standing wheelchair allows for a standing position during the course of mobile use, and which also permits fixed gearing of multiple speeds that also accommodates forwards and backwards motion.

Abstract: A hand-powered vehicle is provided for transportation and entertainment purposes. The vehicle has a frame supporting a pair of side wheels that are driven by the user. The frame includes a front portion and a pair of side portions extending rearwardly to the side wheels. The side portions of the frame do not extend rearwardly past the side wheels. The user sits on a seat that is supported by a portion of the frame extending rearwardly from the front portion and between the two side wheels. A third wheel is provided under or behind the seat, and that wheel is preferably a caster that is coupled to the frame at an angle to a vertical axis. The side wheels have hand grips extending therefrom, and the hand-powered vehicle is configured to be propelled by a user applying a force through the hand grips to rotate the side wheels.

Abstract: A manually-powered vehicle propelled by muscular force, whose user maintains a standing position, and whose drive is hand-held. The vehicle according to the invention includes two drive wheels, with independent mechanisms installed inside them, which transform the swinging motion of the levers into unidirectional gyration of the drive wheels axis thus driving the vehicle forward, at least one neutral wheel mounted in a way allowing rotation around the vertical axis, and where a low-slung platform is attached directly to the casing of the mechanisms.

Abstract: A racing wheelchair is disclosed. The racing wheelchair may have a pair of rear wheels and a steerable single front wheel. The rear wheels may be independently driven by a lever, through a derailer and a chain, such that pushing one of the two levers will move one of the wheels but not the other. The front wheel is steerable by twist grips located at the removed end of the levers. Brake assemblies and shifter assemblies of the derailers are located adjacent the twist grip, and may be rigidly mounted to the push lever or mounted to the twist grip to rotate therewith.

Abstract: A vehicle wheeled device has a drive wheel, two foot pads and two support wheels. The drive wheel is adapted to drive the device along a longitudinal drive path with the foot pads being located at opposing longitudinal sides of the drive wheel. The two support wheels of the device are adapted to engage the ground face at one of the longitudinal sides of the drive wheel with the drive path being located therebetween.

Abstract: The invention provides a media display system and method that allows a user to easily maneuver through crowded areas while providing advertisements that can be selected and altered even while the media display system is in use. According to the invention, the system operates on a regenerative breaking system that recharges the battery as the system is in brake-mode or as a result of the media display in the shape of an airfoil contributing to the regenerative breaking mechanism.

Abstract: An apparatus including a frame; a drive wheel coupled to the frame; a first and a second foot link, operably coupled to drive wheel to transfer power to said drive wheel so as to propel the apparatus, each including a foot receiving portion for receiving an operator's foot, a front end, and a rear end; and a first and a second foot link guide track, each foot link guide track operatively associated with the front end of the foot link to direct the front end along a reciprocating path of travel while providing retention to the foot link.

Abstract: A media display system and method is provided. The media display system comprising a two wheeled base configured for a operator to stand on; a steering column operatively connected to said base; a display means for a user standing on said base to hold and steer, said display mean allowing messages to be displayed; a handle operatively connected to said display means; and at least one wheel operatively connected to said media display such that said media display system can move 365 degrees.

Abstract: A vehicle includes a semi-active suspension including suspension dampers controllably adjustable in accordance with electronic stability control commands and ride and handling commands. Vehicle steering response states, turning direction states and vehicle dynamics states are binary coded in respective state variables and suspension control calibrations are binary coded in calibration words. Integrity and security of state variables and calibration words are ensured in efficient binary digit resource allocation schemes.

Abstract: System for detecting stability/instability of behavior of a motor vehicle upon occurrence of tire slip or lock. State of the motor vehicle is determined on the basis of an alignment torque (Ta) applied from a road and a side slip angle (?). By taking advantage of such torque/slip-angle characteristic that although the alignment torque is proportional to a side slip angle when the latter is small, the alignment torque becomes smaller as the side slip angle increases, a normal value is determined from a straight line slope and the side slip angle in a region where the latter is small. Unstable behavior of the motor vehicle is determined when deviation of actual measured value from the normal value increases. Further, unstable state is determined when the slope of the alignment torque for the slip angle departs significantly from that of approximate straight line slope.

Abstract: Steering angle is determined by the combined use of a potentiometer and a rotary encoder, and the correction of the error in the determination of the steering angle based on the time-dependent change of the potentiometer.

Abstract: A transmission control device which receives steering inputs and speed inputs, and produces an input for a steer transmission and an input for a drive transmission in order to control the direction and speed of a vehicle. The transmission control device, coupled to a steering assembly, coordinates the steering inputs with the speed inputs. The steering assembly which includes an elongated force transmitter operatively coupled to a steering device. The force transmitter, which is operatively coupled to a plurality of front wheels, has a fore-aft path of movement for pivoting the front wheels clockwise or counterclockwise. The present invention enhances the user's control and maneuverability of vehicles.

Abstract: A two wheeled automotive vehicle having a heavily weighted passenger compartment pivotally mounted on, and with its center of gravity below, a trapeze cross bar that is in turn pivotally mounted between axially aligned stub axles for the road wheels. Attitude control is provided and other function for controlling the reactive forces of braking is also disclosed.

Abstract: The present invention provides a rear-wheel steering angle control device which is capable of drastically reducing the man-hours required for setting a gain of a target rear-wheel steering angle relative to a front-wheel steering angle. The rear-wheel steering angle control device includes a target rear-wheel steering angle calculating device which has a variable coefficient inputting device. A specific parameter (such as steady &bgr; gain) of a theoretical transfer function of physical quantity (such as vehicle-body slip angle &bgr;) relative to a front-wheel steering angle is multiplied with variable coefficients (such as K&bgr;) to a transfer function as a target transfer function (target &bgr; transfer function 5).

Abstract: This is a hand-propelled wheeled device for a rider. The device includes: a frame with two sides; a first and second drive wheel rotatably mounted to the two sides; a first hand crank connected to the first drive wheel through a first crank hub, and a first wheel hub that is connected to and rotates the first drive wheel; a second hand crank connected to the second drive wheel through a second crank hub, and a second ratcheting hub that is connected to and rotates the second drive wheel; at least one shifting mechanism to change a leveraging ratio between the first hand crank and the first drive wheel and between the second hand crank and the second drive wheel; a pivoting backrest connected to the frame, wherein the pivoting backrest provides continuous back support to the rider; an adjustable hammock seat connected to the frame; a third support connected to the frame; and a braking mechanism to retard movement of the first and second drive wheels.

Abstract: A motorized scooter is disclosed that comprises a steering shaft mounted for rotation about its axis. A tiller is connected to said steering shaft to rotate said steering shaft, and pivotable relative to said steering shaft. A pivot block is mounted on the free end of said steering shaft, a pair of forks on said tiller straddle the pivot block, and a pivot pin passes through the forks and the pivot block. The pivot block has a pair of lubricating plates of low-friction material on either side of it, so that the forks rest on said lubricating plates to tacilitate pivoting of said steering column. A strut of variable length is connected to the tiller and to said steering shaft so that pivoting of the tiller requires a change in the length of said strut. The strut comprises an inner shaft and an outer sleeve movable along said shaft to vary the length of said strut.

Abstract: A closed loop steer by wire control system has three main components, a steering wheel unit, a roadwheel unit, and a master control unit. Signals generated by sensors in the steering wheel unit and roadwheel unit are passed back to the master control unit for processing. These signals include tie-rod force signals, and a steering wheel position signal. The master control unit uses these signals to calculate a steering wheel reaction torque signal which is sent back to the steering wheel unit to provide the operator with tactile feedback, while roadwheel command signals are sent to roadwheel units to provide steering direction. An Ackerman correction unit is also used to correct the left and right roadwheel positions to track about a common center.

Abstract: The present invention relates to an operation arrangement, particularly to an operation arrangement for a twist vehicle having a sliding slot located on an end portion of an driving frame, a pivot shaft located opposite to the sliding slot, a sliding shaft with one end sliding freely along the sliding slot and another end being connected to a rocking arm, a steering shaft being connected directly and perpendicularly to the rocking arm and operated by a steering wheel. As a result, the steering wheel for the twist vehicle can be extended backwardly towards the rear portion of the operating wheels, close to the user's operation position. This arrangement can improve ease of operation by moving the steering wheel towards the user and also maintain better stability by extending the length of the wheelbase and effectively causing the center of gravity to be shifted toward the idle wheel axle.

Abstract: This is a hand-propelled wheeled device for a rider. The device includes: a frame with two sides; a first and second drive wheel rotatably mounted to the two sides; a first hand crank connected to the first drive wheel through a first crank hub, and a first wheel hub that is connected to and rotates the first drive wheel; a second hand crank connected to the second drive wheel through a second crank hub, and a second ratcheting hub that is connected to and rotates the second drive wheel; at least one shifting mechanism to change a leveraging ratio between the first hand crank and the first drive wheel and between the second hand crank and the second drive wheel; a pivoting backrest connected to the frame, wherein the pivoting backrest provides continuous back support to the rider; an adjustable hammock seat connected to the frame; a third support connected to the frame; and a braking mechanism to retard movement of the first and second drive wheels.

Abstract: A steering linkage coupled with a drive and steer transmission allows a steering wheel to be turned a maximum of between ninety and one-hundred-eighty degrees from a neutral straight forward position, and is adjustable for altering the maximum degree to which the steering wheel is turnable from the neutral forward position.

Abstract: A snow scooter is disclosed. The scooter has elongate board upwardly curved at one or both ends. A receptacle is formed in the board to placement of a steering and braking mechanism therein. A steering and braking handle projects upwardly from the steering and braking mechanism and is used to move the steering and braking mechanism in all 3 directions. A rudder or fin is located at the bottom of the steering and braking mechanism and projects downwardly into the snow. The rudder or fin is turned when the steering and braking handle is turned, effecting steering of the snow scooter. The steering and braking handle may also be angularly moved with respect to the board longitudinal axis in order to cause the control disk to project downwardly from the board bottom into the snow in order to cause braking. Steering and braking may be effected simultaneously from a single handle for a snow scooter that provides ultimate maneuverability and ease of use.

Abstract: A sled having a frame with a seat portion, the frame being supported by two runners each located under one side of the frame, wherein each of the runners is movably connected to the frame by several levers. Each lever is mounted on the frame by a transverse pivot and each has a lower end connected to the runner, the levers allowing the runner connected thereto to move downwardly from a retracted position to an extended position at which latter position the side of the sled above that runner is lifted relative to a snow surface under the runner. A foot pedal may be provided on each side of the frame positioned for use by an occupant of the seat portion and connected to the levers so that pressure on a pedal on one side of the frame causes the levers on that side to extend the runner connected thereto, thus tilting the sled relative to the snow surface.

Abstract: A snow vehicle has a hull with a plurality of longitudinally extending bottom sliding surfaces adapted to independently contact the ground and each incorporating a control element to cause the vehicle to be steered as it is rotated about a longitudinal axis. The snow vehicle has an operator platform hull which will accommodate an operator seated on the snow vehicle when the snow vehicle is utilized as a sled and which will accommodate the feet of a rider when the snow vehicle is operated as a snow board.

Abstract: To support the driver of a road vehicle, a yaw velocity r (in radian/s) around a vertical axis is measured, a driving speed v.sub.x (in m/s) is determined, an acceleration a.sub.x (in m/s.sup.2) in the driving direction is measured, a lateral acceleration is measured at two randomly selected locations at a distance of l.sub.a as a.sub.y1 (in m/s.sup.2, front) and a.sub.y2 (m/s.sup.2, rear), a steering wheel angle .delta..sub.H is measured at the vehicle steering column with a potentiometer, a vehicle wheel angle .delta..sub.L =.delta..sub.H /i.sub.L commanded by the driver is computed, a variable angle .beta..sub.F at the front axis is computed, and these measured parameters are used to calculate, in a microprocessor, according to the equations (4, 20 and 21), an additional steering angle .delta..sub.C, whose addition to the vehicle wheel angle .delta..sub.L commanded by the driver results in the overall wheel angle .delta..sub.F =.delta..sub.L +.delta..sub.C.

Abstract: A foldable skibob includes a frame with a steering column journalled in a forward steering column bearing. A first pivot configuration is attached to the steering column and a front ski is articulated at the first pivot configuration. A second pivot configuration is attached at the rear end and a rear ski is articulated at the second pivot configuration. A first spring support supports the first pivot configuration against the steering column, and a second spring support supports the second pivot configuration against the rear end of the frame. A support element is provided at one of the first and second spring supports against which a respective pivot configuration rests when the skibob is in an operational condition. The support element is pivotable away from the support element towards a center region of the frame between the front end and the rear end for folding the skibob.

Abstract: A two-piece apparatus for sliding over a surface. The device includes forward and rear runners connected by a linkage which allows a user to increase deviation of the runners from a horizontal plane at the same time that a deviation from the longitudinal axis of the apparatus occurs. Thus, the user can tilt or edge the runners at the same time that a turn is being implemented. The board provides a narrower waist section than the leading or trailing sections on each of the forward and rear runners. In addition, at maximum articulation of the runners, a substantially smooth arc is formed along the inner edge of the runners so that optimal cornering and shorter radii may be achieved. Preferably, each of the runners includes a set of fins along a rearward edge so that the device may bite into the surface more aggressively.

Abstract: A parallel vehicle includes three main control systems. The first controls the position and angle of the two parallel wheels relative to a fixed chassis, enabling the wheels to be moved outwardly and inwardly and the camber varied for greater stability, aerodynamic effect, or turning. This first system may be mechanically or hydraulically actuated, but preferably is controlled by a pair of control members whose position relative to the chassis corresponds to the desired position of the wheels relative to the chassis in order to provide an intuitive control mechanism. The second system is the propulsion system which may, for example, take the form of a derailleur drive of the type used in bicycles, but with power from the propulsion system being transmitted to the wheels via a rotating cable and individual gearboxes for each wheel which permit the direction of the wheels to be reversed.

Abstract: The ice slider has a platform on which a person may stand, sit or lie. Under the platform are two or more ice piece holders which clamp ice pieces such that the ice slider may slide on the ground as for example on sloping terrain. The ice clamps are design to hold the ice piece as the ice melts during use until such time as the use has reduced the ice piece to be unusable for further sliding. In the case where a user is seated, steering brakes may be incorporated to allow steering or stopping the ice slider by friction with the ground.

Abstract: This invention relates to an air bag inflation gas generator used to inflate air bags such as air bags for impact safety devices, life jackets, rafts, and escape chutes, and aims to simplify its structure extensively as compared with prior art and to make the device compact easily. Combustion gas produced when gas generating agents are burnt passes through a gas filter which is disposed inside the outer wall of a combustion chamber and flows from gas outlets of the outer wall directly into an air bag. When the combustion gas passes through the gas filter, residues contained in the combustion gas is collected by the gas filter to purify the combustion gas. And, the combustion gas produced when gas generating agents are burnt is changed its passage by gas passage changing means, and the residues contained in the combustion gas are collected between a partition member and the gas passage changing means before the combustion gas enters the gas filter.

Abstract: A skiing vehicle includes a seat having two rear ski boards secured to the rear and bottom portion and having a beam pivotally coupled to the front portion. The beam includes a front ski board secured to the front portion and includes a pair of foot pedals secured to the front portion for rotating the beam. The rear ski boards are moved forward when the beam and the front ski board are rotated by the foot pedals. The beam may include a rod extended in a curved slot of the seat so as to limit a rotational movement of the beam.

Abstract: A coaster having a pair of longitudinally-extending and laterally-spaced flexible sled runners which support and define a path for the coaster along a ground surface. The coaster includes forward, intermediate, and rearward lateral struts extending between the flexible runners. The flexible sled runners extend forward from the forward lateral strut to leading rail ends. A longitudinally-extending body support board is mounted above the runners in such a manner as to-allow it to pivot or tilt, relative to the flexible sled runners, about a longitudinal axis. A steering handle is operably connected to the leading rail ends to laterally displace the leading rail ends and to thereby arc the flexible sled runners. Interlinkage between the steering handle and the body support board pivots the body support board in response to turning the steering handle.

Abstract: A single runner ski-sled is provided wherein the main structure is adapted for one piece molding techniques with sufficient strength for effective use. The runner is designed to be rigid. The device of the invention also includes a seat attachment structure that allows for easy installation and removal yet can withstand strong pressures.