Abstract: A raceway system routes power and communication cabling in separate channels but terminates the power and communication cabling in a common center channel. The raceway system includes a base, outer walls and inner walls, one of the outer walls and one of the inner walls define a first outer channel, adjacent inner walls define a center channel and one of the outer walls and one of the inner walls define a second outer channel. The raceway system also includes a plurality of covers connected to the inner and outer walls to cover the channels.

Abstract: Providing a power supply apparatus for a sliding structure, which can be arranged in a small space in the sliding structure, the power supply apparatus includes a wiring harness having a vertical path portion; a harness fixing member for fixing one end of the vertical path portion of the wiring harness on the sliding structure; a fixed base fixed on the sliding structure for holding the other end of the vertical path portion; and a swing member mounted on the fixed base to swing freely in a horizontal plane for allowing the vertical path portion to be twisted along a circumferential direction of itself and leading a part of the wiring harness continued to the vertical path portion toward a fixed structure. Instead of the fixed base, a movable base 5?, and a guide rail to be engaged with the movable base can be applied.

Abstract: A twist-on wire connector having a finger friendly unbiased cushioned cover that covers not only the normal hand gripping region but at least part or all of the normal non-hand gripping region of the twist-on wire connector so that regardless of the way the twist-on wire connector is grasped the user fingers engage the cushioned cover to inhibit finger and hand injury and fatigue from repeated securement of twist-on wire connectors to electrical leads and a method of making a twist-on wire connector with a cushioned cover by placing a soft to the touch material on the exterior surface of the twist-on wire connector.

Abstract: Embodiments of the present technique relate to a system for cable management. In one embodiment, the system comprises a display, wherein the display comprises a display screen, a cable passage having a route along a portion of the display, and a pliable flap extending at least partially across the cable passage along the route.

Abstract: An electrical conductor having an insulation jacket, which jacket includes from about 40% to about 50% by weight of a polyvinyl chloride resin; from about 20% to about 35% by weight of a filler; from about 0.1% to about 0.5% by weight of an unsaturated primary amide derived from erucic acid; from about 20% to about 30% by weight of a phthalate-based plasticizer; and from about 0.5% to about 5% by weight of a lead-free heat-stabilizing system; wherein 100% is the weight of the jacket. Methods for improving the slip characteristics of an electrical conductor, having a lead-free NM jacket are also provided.

Abstract: A power transmission cable with easy laying, reduced heat invasion and enhanced efficiency. The cable comprises an inner pipe 105 encasing a refrigerant passage 101, a superconducting member 102 and an electrically insulating portion 103; an outer pipe 106; a vacuum adiabatic insulating section 104 between the inner and outer pipes; an inner pipe support ring disposed between the inner and outer pipes so that it is slidable along the outer side of the inner pipe; an outer pipe support ring fixed to the inner side of the outer pipe; and a support member which is disposed between the inner and outer pipe support rings.

Abstract: Embodiments of the present technique relate to a system and method for managing cables in a display base. Specifically, embodiments of the present technique comprise a display base having a cable passage between a pliable flap and a footing, the cable passage traversing a portion of the display base, and a display coupled to the display base.

Abstract: Embodiments of the present technique relate to a system and method for managing cables in a display stand. Specific embodiments of the present technique include a display stand having a cable passage between a pliable flap and a vertical structural member, the cable passage traversing a portion of the vertical structural member, and a display coupled to the display stand.

Abstract: A conductor routing device is configured as a drag chain and has a supply line that is conducted in a flexible cable conduit. The device is configured as a one-piece component, comprising several segments that run around the supply line and are interconnected by reinforcement struts, which are arranged in a line and form a reinforcement strip in such a way that a flexural direction is defined for the cable conduit. The design in particular of a cast/expanded/injected module enables diverse functions to be integrated into the cable conduit and eliminates the assembly labor required to assemble the individual chain links for a conventional drag chain.

Abstract: A suspension clamp (10) comprises a stirrup part (12) having an upper end adapted for pivotal connection to a string of insulators (S) of a transmission tower. A clamping part (14) is accommodated within the stirrup part (12) for clamping onto the overhead conductor (L) supported by the towers. A releasable connection (34) is provided between the stirrup part (12) and the clamping part (14) for releasing the clamping part (14) from the stirrup part (12) whenever a predetermined excessive longitudinal force is exerted by the overhead conductor (L), thereby preventing damage to the tower and the insulators. The stirrup part (12) holds the line together with the clamping part (14) suspended once the clamping part (14) has been released from the stirrup part (12).

Abstract: A stack structure of carrier boards embedded with semiconductor components and a method for fabricating the same are proposed. A first carrier board and a second carrier board, each of which having at least one through hole, are provided. A first protecting layer and a second protecting layer are formed on a surface of the first and second carrier boards respectively. At least one first semiconductor component and at least one second semiconductor component are disposed on the first and second protecting layers and accommodated in the first and second through holes respectively. A dielectric layer is laminated between the surfaces of the first and second carrier boards without the protecting layers formed thereon. Thus, a modularized package structure with reduced space waste is formed.

Abstract: Disclosed is a laminated (or non-laminated) conductive interconnection for joining an integrated circuit device to a device carrier, where the conductive interconnection comprises alternating metal layers and polymer layers. In addition, the polymer can include dendrites, metal projections from the carrier or device, and/or micelle brushes on the outer portion of the polymer. The polymer layers include metal particles and the alternating metal layers and polymer layers form either a cube-shaped structure or a cylinder-shaped structure.

Abstract: The present invention discloses a method for manufacturing a coreless substrate. The method comprises the steps of (a) forming an insulating layer on one side of a metal sheet; (b) forming a via hole on the insulating layer for electrical connection between the metal sheet and the other side; and (c) forming a plurality of protruded function pads by etching the metal sheet. The coreless substrate and manufacturing method thereof in accordance with the present invention have the signal delivery characteristic that is improved by eliminating the inner via hole.

Abstract: An electromagnetic shield is provided for a room or for a building, including overlapping, conductively connected, and electrically conductive mesh or grid sections (1-4). The sections are grounded and folded in the overlapping area, where the folds of adjacent mesh or grid sections (1, 2) interlock like hooks in a cross section view.

Abstract: An electromagnetic relay includes a base configured to support relay components. The base has a perimeter edge. A cover is joined to the base to define an interior volume. The cover has a lower edge held proximate the perimeter edge of the base. The lower edge and the perimeter edge have a gap therebetween. A soft sealant is provided between the lower edge of the cover and the perimeter edge of the base to fill the gap. The soft sealant forms a noise attenuating seal between the cover and the base. The soft sealant forms an air tight seal between the base and the cover when the soft sealant is cured. The soft sealant includes a heat cured epoxy having a Shore A hardness of about forty five. A plurality of electrical terminals extend through the base to form a terminal gap between the terminals and the base. The soft sealant fills the terminal gap.

Abstract: A removable power supply system is proposed, which includes a power supply and a power supply adapter. The power supply adapter is fastened and electrically connected to the power supply. The power supply is provided with a first electrical connection portion and a first fastening portion. The power supply adapter is provided with a second electrical connection portion electrically connected to the first electrical connection portion and a second fastening portion fastened to the first fastening portion. In so doing, not only are the power supply and the power supply adapter fastened together, but individual power supply adapters are independent of each other, thereby solving the drawbacks of the prior art.

Abstract: A boring tool moves having a pitch orientation, a yaw orientation and a roll orientation and is steerable underground using the roll orientation. A maximum drill string curvature is established for steering. The boring tool is advanced over a path segment. An averaged roll characteristic is determined for movement of the boring tool along the path segment. A path segment pitch orientation is established based on at least one measured pitch orientation along the path segment. Using the maximum drill string curvature in combination with the averaged roll characteristic and the path segment pitch orientation, the yaw orientation is determined. The averaged roll characteristic is determined based on a series of incremental roll measurements that are spaced across the path segment. A set of coupled ordinary differential equations is used to characterize movement of the boring tool.

Abstract: A detector for locating a sonde is comprised of a plurality of antennas, a corresponding number of signal isolator modules 1 and a geometrical evaluation module. The magnetic signal generated by the sonde has a fundamental frequency and harmonic frequencies. A frequency spectrum analyser 29 which forms part of the signal isolator module 1 has frequency bins which are aligned with the fundamental frequency and a plurality of harmonic frequencies of the magnetic signal produced by the sonde. The frequency bins follow variations in the frequency of the magnetic signal produced by the sonde which allows the detector to detect the sonde at a separation of up to 30 m.

Abstract: A method for sealing a hole in a tubular in a wellbore comprising: (A) locating the tubular patch adjacent the hole; (B) (i) plastically expanding a first portion of the tubular patch above the hole into annular sealing engagement with the tubular to form a first annular seal and (ii) plastically expanding a second portion of the tubular patch below the hole in the tubular into annular sealing engagement with the tubular or the open hole to form a second annular seal thereby sealing the hole in the tubular. The patch may be a corrugated tube prior to expansion in order to pass through restrictions and may have a section with an increased wall thickness including a resilient seal.

Abstract: A system for facilitating flow of settled solids with drilling fluid from a container, the system including pressure nozzle apparatus with at least one nozzle from which is flowable fluid under pressure, powered rotation apparatus for selectively rotating the pressure nozzle apparatus so that the at least one nozzle is movable within the container as fluid is pumped through the at least one nozzle into the container; and, in one aspect, translation apparatus for moving the pressure nozzle apparatus with respect to the container as fluid under pressure is pumped to the at least one rotating nozzle.

Abstract: A system for controlling viscosity of drilling fluid, the system, in certain aspects, including a container of the material, a viscosity sensor in the container for producing viscosity signals, a centrifuge for removing solids from the material, drive apparatuses for driving a rotatable bowl and a rotatable conveyor of the centrifuge, pump apparatus for pumping material, drive apparatus for the pump apparatus, and a control system for controlling the centrifuge and the pump apparatus in response to viscosity signals so that selected solids from material processed by the centrifuge back into the container to control viscosity of drilling fluid material in the container.

Abstract: A cutter element for a drill bit includes a leading cutting surface and a trailing cutting surface. The leading surface includes a top surface and a front surface that meet in a radiused intersection forming a forward-facing, non-linear crest of non-uniform radius. The radius of the crest is smallest at the forward-most portion, and greater at each end. The crest has its largest radius at a location between its forward-most portion and one of its ends. The cutter element may be employed in the corner cutting portion of a rolling cone cutter in a drill bit, the cutter element being positioned such that the forward-most portion of the crest first engages the formation material, with the crest end having the largest radius being closest to the pin end of the bit.

Abstract: The invention relates to a method for producing and/or updating learning and/or random test samples for the optimization of automatic optical readers for inscriptions on mail with adaptive classifiers, comprising the following steps: reading of wireless-readable or inscribable memory units located on or in the mail item in addition to automatic optional reading; storage of the data as destination addresses, together with the captured image of the surface of the mail item in a random test sample data base, if destination address data is identified and read from a memory unit.

Abstract: Formula for calculating weight of individual using two scales in the shoes is Total weight= A=(Scale1)+(Scale2) Split weight=left foot(scale1) and Right foot(scale2) Weight variation or Change or (B)=Total weight?total split weight Variation in percentage point (%)=T change×100/total weight or B X 100/A=%

Abstract: Bending wave vibration is used to calculate information relating to a contact on a contact sensitive device. The contact sensitive device has a member capable of supporting bending waves, and a device attached to the member measures bending wave propagation in the member to determine a measured bending wave signal. The measured bending wave signal is processed to calculate information relating to the contact. The contact sensitive device may comprise a transparent touch sensitive plate mounted in front of a display device.

Abstract: A preferred embodiment of a touch sensing apparatus includes an amplifier, an alternating current (AC) signal source, a sensor, a detector, a first load circuit, and a second load circuit. The alternating current (AC) signal source is for outputting AC signals to a first input and a second input of the amplifier. The sensor is for receiving electricity signals from an object that touches the sensor. The detector is for identifying a touch on the sensor according to output of the amplifier. The sensor and the first load circuit and the second load circuit, enable the amplifier has a common mode (CM) input when the sensor is not touched by the object. The sensor receives electricity signals from the object and enables the amplifier has a differential mode input. The amplifier amplifies a difference between the first input and the second input thereof and outputting the amplified difference to the detector.

Abstract: A touch sensing apparatus includes a sensor (13), an AC signal source (14), a gate circuit (15) with two inputs, a first load circuit (18), a second load circuit (19) and a detector (16). The alternating current (AC) signal source is for outputting AC signals to the two input of the gate circuit. The sensor and the first and second load circuits are configured to enable the input signals to the two inputs of the gate circuit to be completely in phase and have same frequency and same duty cycle, and the gate circuit produces the first output type signal. The sensor receives electricity signals from the object and results in the gate circuit outputting a second output type signal. The detector detects the change of the output signal of the gate circuit from the first type to the second type and accordingly identifies a touch on the sensor.

Abstract: Simple to operate and easy to maintain manually powered, non-electronic, skid steering apparatus using conventional appearing steering wheels or handle bars, fixed or tiltable for ease of access, with some having built in throttle control for operator comfort and ease of new operator training.

Abstract: A vehicle having a main chassis (3) and a power source (4) for driving the vehicle, a drivable steer carriage (1) pivotally supporting the main chassis (3) about an at least substantially upright pivotal axis (2), the carriage including a plurality of opposed pairs of carriage wheels (5a, 7a, 9a), at least one said pair of carriage wheels being driven by a drive transmission including an input shaft (17a) at least substantially aligned with said upright pivotal axis (2) such that the power source (4) can transfer power through the input shaft (17a) to at least one carriage wheel pair.

Abstract: Enhanced stability of a wheelchair having a lift mechanism is provided, through utilization of a support apparatus including a unitized chassis for operatively connecting a seat and wheels of the wheelchair. A tilt sensor and controller preclude operation of the wheelchair with the seat in raised position while the wheelchair is resting on or traversing an uneven or sloping surface.

Abstract: A hybrid vehicle is provided in which, since the driving force of a generator/motor (M1) is transmitted to the downstream side of an output shaft (17) of a transmission (T) without going through an input shaft (16) thereof and the output shaft (17), it is possible to carry out the so-called leg shaft drive, which prevents the driving force of the generator/motor (M1) from dragging along an engine (E), the input shaft (16), and the output shaft (17), thus reducing power consumption and enhancing energy recovery efficiency during regenerative braking. Furthermore, since the generator/motor (M1) is disposed at a position sandwiched between the engine (E) and the transmission (T), it is possible to employ the same layout for the generator/motor (M1) as for a conventional sandwiched generator/motor type, and the leg shaft drive system can be employed without greatly modifying the design of the transmission (T).

Abstract: A method of sanitizing shopping carts by applying a sanitizing fluid to the shopping carts. A pressurized supply of sanitizing fluid is applied to the shopping carts contained with a cart enclosure through a series of spray nozzles mounted along a spray arch. The sanitizing fluid is created in a chemical-down system and includes a sanitizing agent including peroxyacetic acid, hydrogen peroxide, acetic acid and a carrier such as water. The sanitizing fluid further includes a surfactant mixed into a supply of fresh water. The sanitizing fluid is applied to the shopping carts at ambient temperature and is allowed to air dry.

Abstract: The present invention relates to the vehicle field, more particularly, to a hydrogen hybrid power electric vehicle which combusts hydrogen instead of gasoline or diesel, characterized in that an alcohol cracking hydrogen generator is in serial connection in the line of an exhaust pipe of the hydrogen engine of the vehicle which can produce hydrogen on board by cracking alcohol using the afterheat of the exhaust gases so as to drive the vehicle to run and the electric motor to generate power. When a vehicle is driven by a hydrogen engine according to the present invention combined with an electric motor, ultra-low emission or zero-emission can be reached. Plenty of raw materials can be used to produce hydrogen such as sugarcane, maize, sweet broomcorn and cassava etc. all of which are inexhaustible regenerative resources. The alcoholic materials used to produce hydrogen can be 50°-65° hydrous methanol or ethanol, which involve easy processing technology and low costs.

Abstract: A hybrid electric vehicle employs a permanent magnet type dynamo-electric machine having a stator with a stator iron core around which a stator coil is wound, and a rotor arranged in the stator at a rotational gap and having a plurality of permanent magnets arranged and fixed within a rotor iron core in a peripheral direction. A ratio exists between a maximum torque output by the dynamo-electric machine when the dynamo-electric machine normally rotates and a torque output by the dynamo-electric machine when reverse rotating establishes in a relation 1:1.05-1.2, whereby torque at the reverse rotation becomes greater.

Abstract: A method is provided for shutting down an internal combustion engine in a hybrid vehicle that includes a motor and a generator operatively connected to an engine crankshaft. The method includes the steps of reducing compression in at least one engine cylinder and operating the motor or generator to influence motion of the engine crankshaft during engine shutdown to attenuate oscillations in and expedite reduction of engine crankshaft speed. A system for shutting down a hybrid vehicle internal combustion engine is also provided.

Abstract: An attachment is provided on a vehicle body of a motorcycle and a hydrogen cylinder is equipped on the vehicle body in a detachable manner. The attachment can be connected with a parking stand by a ground wire and the hydrogen cylinder can be grounded via the attachment and the like when the motorcycle is rested on the parking stand. A bracket with a handle and a locked part can be provided on the hydrogen cylinder and a locking part capable of engagement with the locked part can be provided on the attachment. In addition, a connector 34 is provided on the hydrogen cylinder and a connector adapter capable of engagement with the connector is provided on the attachment.

Abstract: A device for detecting a road traveling lane, which is capable of stably defining a position of a boundary of a traveling lane. Edge point detection means (ED) detects a plurality of edge points in a contour on an image, and segment group producing means (SD) produces a line segment on the basis of continuity of distance and direction between neighboring edge points, and groups a plurality of line segments having a predetermined relationship with each other, to produce a segment group. Further, curve detection means (CD) detects a curve fitted to the segment group. Then, when a segment group forming a curve closest to the center of the traveling lane has a predetermined length and repeated cycle, lane boundary position defining means (LD) defines the segment group as the innermost marking line, and defines a position of a neighboring curve outside of the innermost marking line as the position of the boundary of the traveling lane.

Abstract: A vehicle body includes a front frame, a rear frame, a control unit, a fixing screw, a battery, and a locking unit. Thus, the rear frame is combined with and detached from the front frame easily and rapidly, thereby facilitating a user assembling and disassembling the vehicle body. In addition, the fixing hooks of the front frame are snapped onto the fixing stubs of the rear frame, and the locking hook of the control unit on the support post of the rear frame is locked in the locking hole of the front frame, thereby forming a three-point support structure by the fixing hooks, the fixing stubs and the locking hook, so that the rear frame is combined with the front frame rigidly and stably.

Abstract: An intake air control device is provided in which a throttle valve is fixed to a valve shaft which is rotatably supported within air intake path of an engine body. An actuator is connected to an end of the valve shaft to reduce the length of a throttle cable while simplifying the structure of a steering handle in the vicinity of the throttle grip. A vehicle body frame includes a head pipe at a front end, and a pair of main frames bifurcated from the head pipe to the left and right and toward the rear. A throttle operating amount detecting module, formed by mounting a throttle operating amount sensor to a storage box for storing a rotating member, which rotates in response to a throttle operation, is supported by one of the main frames in front of an air intake path forming body and arranged between the main frames.

Abstract: A saddle type vehicle is provided in which a valve shaft for a throttle valve is rotatably supported on an air intake path forming body, and a valve shaft actuator is connected to an end of the valve shaft in such a way that the rotational movement of the valve shaft is fed back to the throttle grip, whereby it is not necessary to extend a cable between the between the valve shaft and the throttle grip, and the rotational movement of the valve shaft can be fed back to the throttle grip. A grip-driving electric motor, which is moved by the amount of movement according to the amount of rotation of the valve shaft in response to the operation of the actuator, is disposed on the steering handle, and is interlocked and connected to the throttle grip.

Abstract: An all-terrain or utility vehicle having various combinations of left and right front wheels, left and right rear wheels, a differential rotationally variably coupling the left and right front wheels together with a variable coupling torque and a source of motive power being selectively coupled to the left and right rear wheels in one configuration and coupled to the left and right front wheels as well as to the left and right rear wheels in a second configuration. The coupling torque is relatively stronger when a speed of the vehicle is relatively slower and is relatively weaker when the speed of the vehicle is relatively faster.

Abstract: A drive train for a vehicle having an axle and a multi-speed drive unit. The axle includes a housing and a differential with an input pinion. The drive unit includes a planetary transmission, a drive unit housing and a dog clutch that is employed to selectively operate the planetary transmission in different speed ratios.

Abstract: The invention relates to a method for detecting the attention level of a vehicle operator, wherein a steering performance of the vehicle operator is monitored, as well as to a device (30) for detecting the attention level of a vehicle operator, with at least one sensor device detecting the steering performance of the vehicle and with a signal measurement and evaluation unit (32). According to the method of the invention, a phase relationship between a change of a steering angle (?) of at least one steerable wheel (22) of the vehicle and a change of the steering wheel angle (?) is evaluated. With the device of the invention, at least one signal (48) corresponding to the attention level can be generated, with the signal depending on a phase relationship between a steering angle (?) of at least one steerable wheel (22) of the vehicle and a steering wheel angle (?).

Abstract: A traveling apparatus is provided with two wheels parallel each of which is driven independently, being controlled to be stable in an anteroposterior direction between the two wheels and traveling. The traveling apparatus includes a mechanism estimating an inclination of a plane where a pitch angular velocity sensor is horizontally installed with respect to a horizontal plane by using a sensor measuring a tilt of a vehicle body in a roll axis direction and a mechanism calculating a correct pitch angle by obtaining a yaw rate mixed in the pitch angular velocity sensor based on the estimated inclination and a turn velocity of the vehicle body and by canceling the yaw rate mixed.

Abstract: A mounting structure of a collision detection apparatus for a vehicle has a vehicular member, a pressure sensor, and a shock absorbing member. The vehicular member defines a closed space therein. The shock absorbing member is disposed between the pressure sensor and a wall of the vehicular member. The pressure sensor is mounted to the wall of the vehicular member through the shock absorbing member in the closed space. The shock absorbing member is for example a nail-shaped spring member. Alternatively, the shock absorbing member can be a spacer having rubber elasticity.

Abstract: A hub drive includes an in-hub motor and a shifting in-hub transmission coupled with the motor. A hub drive wheel assembly includes a wheel comprising a hub, an in-hub motor, and a shifting in-hub transmission having an input attached to the motor and an output attached to the wheel. A vehicle includes a chassis, a wheel comprising a hub, an in-hub motor, and a shifting in-hub transmission having an input attached to the motor and an output attached to the wheel for rotating the wheel with respect to the chassis. A method includes providing a shifting transmission and a motor coupled with the transmission in a hub of a wheel, providing electrical power to the motor, and rotating the motor with the electrical power. The method further includes rotating the transmission with the motor and rotating the wheel with the transmission.

Abstract: Since a rigid supporting structure for a gear box GB and a rolling type rack supporting device RSD are employed, an electric power steering apparatus having no response delay and having a high transmission efficiency can be realized. Further, a high steering performance required for a long period and a steering assist force that is increasing recently can be efficiently transmitted to wheels. Further, when the wheels collide with a shoulder of a road to receive a counter input, a torque sensor TS detects a torque and an assist steering force against the counter input is outputted to an output shaft OS Consequently, the torque of the counter input is restrained from being transmitted to a steering shaft SS side. Thus, a kick back and a vibration are advantageously hardly transmitted to a steering wheel SW from the wheels.

Abstract: This invention relates of a support assembly (10) for a vehicle (16) of the type that includes an enclosed load carrying compartment (17) having a roof (18), said support assembly being adapted to provide support for a person when moving about on said roof. The support assembly includes a guide (11) that is mountable on the roof and a base (12) that is adapted to engage said guide and which is capable of movement along said guide while remaining engaged therewith. The support assembly also includes a support structure that includes a lower end portion that is pivotally connected to the base and a handle (15) that is spaced from said base. The support assembly also includes a lock (73) for selectively locking the support structure in a desired attitude relative to the base.

Abstract: A drag harness comprises an elongate, flexible member, which is connected end-to-end so as to define a large loop, and a drag grip, which is provided with a pair of tunnels. Through each of the tunnels, the elongate, flexible member passes so as to divide the large loop into two arm loops having the drag grip between the arm loops. The elongate, flexible member passes loosely therethrough, whereby relative sizes of the arm loops are variable.

Abstract: A human powered movement apparatus for moving a wheeled structure or scaffold. The human powered movement apparatus having a horizontal lever bar operable by a person working on a platform of the scaffold. The horizontal lever bar is connected, by way of a shaft, to a wheel frame with a set of unidirectional wheels. When the operator moves the horizontal lever bar in one direction, the wheel frame pivots about one of the unidirectional wheels while the other unidirectional wheel rolls freely causing the scaffold to advance in an arc. Movement of the horizontal lever bar in the opposite direction results in a similar movement with the behavior of the unidirectional wheels reversed. Repeated movement of the horizontal lever bar results in forward movement of the scaffold through a cambering motion.