Patent Publication Number: US-2018043950-A1

Title: Kart

Description:
CROSS REFERENCE 
     This application claims priority to International Application No. PCT/CN2017/072086, filed Jan. 22, 2017, which claims priority to Chinese Utility Model No. 201620882608.6, filed Aug. 15, 2016, the entirety of each of which is incorporated by reference herein. 
    
    
     BACKGROUND 
     Field 
     The present disclosure generally relates to mobility vehicles, such as karts. 
     Certain Related Art 
     Many types of mobility vehicles exist, such as roller skates, skateboards, scooters, bicycles, karts, etc. A user can ride such a vehicle to travel from place to place. 
     SUMMARY OF CERTAIN FEATURES 
     A need exists for new and/or improved designs, which may provide a new riding experience or unique functionality. The systems, methods and devices described herein have innovative aspects, no single one of which is indispensable or solely responsible for their desirable attributes. 
     Various karts are described in this disclosure. According to some embodiments, a ridable kart includes a kart body, a cover body, a steering assembly, a battery, and a controller. The kart body can include an installation slot. The slot can include an opening. The cover body can be rotatably connected with the kart body at one end of the opening of the installation slot. The steering assembly can be connected with the kart body. The steering assembly can include a front wheel and a steering wheel. The front wheel can include a hub motor arrangement integrated with the front wheel. The steering wheel can be connected to the front wheel. The steering wheel can allow a user to steer (e.g., turn) the kart. The battery can supply power to the hub motor. The controller can cause the battery to supply power to the hub motor. The battery and the controller can be secured within the installation slot. 
     In some embodiments, the kart includes a seat that can support the user during operation of the kart. In some embodiments, the kart body includes a base and a raised region. The seat can be connected with the raised region to support the user at an elevated position relative to the base. In some embodiments, the installation slot is positioned forward of the seat. In some embodiments, the installation slot is positioned between the steering assembly and the seat. In some embodiments, the cover body has a generally U-shape, and the cover body is rotatably connected to the end of the opening of the installation slot adjacent to the seat. 
     In some embodiments, the kart includes an installation rack connected with the kart body. The installation rack can include a power switch. The installation rack can be positioned between the installation slot and the steering assembly. In some embodiments, the kart includes a charging port connected to the battery. 
     In some embodiments, the kart body includes a protruding portion, and the steering assembly is connected with the kart body at the protruding portion. In some embodiments, the battery is secured to the installation slot by a clamping member. The clamping member can be positioned adjacent the battery and a fastener that can pass through the clamping member to secure the clamping member and the battery to the kart body. In some embodiments, the kart body is integrally formed by blow molding. 
     In some embodiments, the steering wheel includes a top cover comprising a fixture block, a bottom cover comprising a card slot, and a connection rack coupled with an inner side of the bottom cover. The fixture block can be clamped within the card slot to secure the top cover to the bottom cover. 
     In some embodiments, the steering wheel includes an insert positioned within an interior space between the top cover and the bottom cover. In some embodiments. the top cover includes a first material, the bottom cover includes the first material, and the insert includes a second material. In some embodiments, the first material includes plastic and the second material includes metal. 
     In some embodiments, the steering assembly includes a steering component connecting the steering wheel to the front wheel. The steering component can include a connecting rod and a fork. The connecting rod can be connected to the connection rack by a second fastener. The fork can be connected to the connecting rod and the front wheel. 
     In some embodiments, the fork includes a first set of prongs including a first interior space configured to receive an axle; and a second set of prongs including a second interior space configured to receive at least a portion of the hub motor. The first interior space can be narrower than the second interior space. 
     In some embodiments, the kart includes a pedal connected with the kart body to control a rotational speed of the front wheel. In some embodiments, the seat is configured to be positioned below the steering wheel. In some embodiments, the seat comprises a back portion and a base. The back portion can be generally aligned with a rear side of the kart body. 
     The foregoing summary is a high-level overview of certain features of the kart. The summary is illustrative only and is not intended to be limiting. Other aspects, features, and advantages of the kart will become apparent from the description below. No feature in this disclosure is essential or critical. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The foregoing and other features of the present disclosure will become more fully apparent from the following description and appended claims, taken in conjunction with the accompanying drawings. Understanding that these drawings depict only illustrative embodiments in accordance with the disclosure and are not to be considered limiting of its scope, the disclosure will be described with additional specificity and detail through the use of the accompanying drawings. 
         FIG. 1  illustrates a front, top, and side perspective view of an embodiment of a kart. 
         FIG. 2  illustrates a front view of the kart of  FIG. 1 . 
         FIG. 3  illustrates a rear view of the kart of  FIG. 1 . 
         FIG. 4  illustrates a side view of the kart of  FIG. 1 . 
         FIG. 5  illustrates another side view of the kart of  FIG. 1 . 
         FIG. 6  illustrates a top view of the kart of  FIG. 1 . 
         FIG. 7  illustrates a bottom view of the kart of  FIG. 1 . 
         FIG. 8  illustrates a rear, top, and side perspective view of the kart of  FIG. 1 , showing an installation slot in an opened position and with a visibility flag. 
         FIG. 9  illustrates a partial exploded view of the kart of  FIG. 1 , showing example locations of a battery and a controller with the installation slot in the opened position. 
         FIG. 10  illustrates a front, top, and side perspective view of a body of the kart of  FIG. 1 . 
         FIG. 11  illustrates a top view of the body of  FIG. 10 . 
         FIG. 12  illustrates an exploded view of a steering assembly of the kart of  FIG. 1  showing examples of at least a steering wheel and a front wheel. 
         FIG. 13  illustrates a partial close-up view of a portion of the steering wheel of  FIG. 12 , showing a close-up of part A. 
         FIG. 14  illustrates a partial close-up view of a portion of the steering wheel of  FIG. 12 , showing a close-up of part B. 
         FIG. 15  illustrates a front, bottom, and side perspective view of the kart of  FIG. 1 . 
     
    
    
     DESCRIPTION OF CERTAIN EMBODIMENTS 
     Embodiments of systems, components and methods (e.g., of assembly and manufacture) will now be described with reference to the accompanying figures, wherein like numerals refer to like or similar elements throughout. Although several embodiments, examples and illustrations are disclosed below, the inventions described herein extend beyond the specifically disclosed embodiments, examples and illustrations, and can include other uses and obvious modifications and equivalents thereof. Certain embodiments can comprise several novel features and no single feature is solely responsible for its desirable attributes or is essential to practicing the inventions herein described. 
     The terminology used in this disclosure should be interpreted by its plain and ordinary meaning, unless specifically specified otherwise. The terminology should not be interpreted in any limited or restrictive manner simply because it is being used in conjunction with a description of certain specific embodiments of the inventions. Throughout the following description, like numbers refer to like components. 
     Overview 
     Various embodiments of a riding kart are described below. The riding kart can be driven and/or turned as the kart is driven over a riding surface. In some embodiments, at least a portion of the kart (such as a kart body  1 ) includes various materials. The material of the kart, such as the kart body, can include plastic, among other materials. The plastic material can provide sufficient strength to support a user. In some embodiments, the plastic material can desirably reduce the weight of the kart body and/or the kart as a whole. In some embodiments, the reduction in weight can help to reduce a driving load. Some configurations can beneficially decrease the amount of power required to drive the kart and/or increase the battery life of the kart. Some configurations can reduce wear and tear on the kart, and/or increase the life-span of certain components, among other benefits. Some such configurations can help to reduce the amount of material required to form the kart. 
     In some embodiments, the kart and/or the kart body, among other portions of the kart can be made using various manufacturing processes. For example, in some embodiments, the kart body can be formed via a blow molding process. In some embodiments, the blow molding process can allow the kart body to be integrally formed as a single unit. In some embodiments, the kart body is constructed from several portions that are connected and/or otherwise attached. In some embodiments, the blow molding process allows for higher efficiency in forming the kart body. 
       FIGS. 1-15  illustrate an embodiment of a kart  100 . The kart  100  can include a kart body  1 , a steering assembly  150 , and/or one or more wheels. In some embodiments, the kart  100  includes at least one front wheel  4  and at least one rear wheel  154 . As will be described in more detail below, the at least one front wheel  4  and/or the at least one rear wheel  154  can be powered and/or steerable. In some embodiments, the at least one front wheel  4  and/or the at least one rear wheel  154  can be non-powered. While the illustrated embodiment shows a front wheel  4  being powered by, for example, a motor (e.g., a hub motor), in some embodiments, the at least one rear wheel  154  can be powered, the at least one rear wheel  154  can be non-powered, and/or the front wheel  4  can be non-powered. 
     Kart Body 
       FIG. 1  shows an embodiment of the kart  100 .  FIGS. 10 and 11  show an embodiment of the kart body  1 . As shown in  FIG. 1 , in some embodiments, the body  1  can include a base  168  and one or more raised regions. The body  1  can include a rearward region  160 , an intermediate region  162 , and a forward region  164 . The rearward region  160  can include a raised region  166 . The raised region  166  can be raised relative to a base  168  of the body  1 . In some embodiments, the raised region  166  can include a flat portion  169  (see  FIG. 10 ). The flat portion  169  can provide a platform to support a user. 
     In some embodiments, the raised region  166  extends laterally across at least a portion of the body  1 . In some embodiments, the raised region  166  extends laterally across a width of the rearward region  160  of the body  1 . In some embodiments, the raised region  166  includes side portions extending between the base  168  of the body  1  and the flat portion  169  of the raised region  166 . In some embodiments, the side portions are angled inwardly and upwardly from the base  168  of the body  1  towards the flat portion  169 . In some embodiments, the side portions extend approximately vertically from the base  168  towards the flat portion  169 . In some embodiments, the side portions extend outwardly from the base  168  towards the flat portion  169 . In some embodiments, the raised region  166  is configured to engage with a visibility feature, such as a flagpole. For example, the raised region  166  can include a recess that receives a bottom end of the flagpole. In certain implementations, the raised region  166  comprises a shoulder on one or both lateral sides of a seat  8 . 
     In some embodiments, the forward region  164  includes a protruding portion  170 . At least a portion of the protruding portion  170  can be elevated relative to the base  168  of the body  1 . In some embodiments, the protruding portion  170  is elevated relative to the intermediate region  162  and/or the raised region  166 . 
     In some embodiments, the protruding portion  170  has a generally trapezoidal shape. For example, the protruding portion  170  can have a rearward side  170 A, a top side  170 B, and a front side  170 C. In some embodiments, at least a portion of the intermediate region  162  (such as a body cover  3  as described below), forms the rearward side  170 A of the protruding portion  170 . In some embodiments, the rearward side  170 A extends between the intermediate region  162  and the top side  170 B of the protruding portion  170  (e.g., upwardly from the intermediate region  162 ). In some embodiments, the top side  170 B of the protruding portion  170  is elevated relative to a remainder of the body  1 . In some embodiments, the top side  170 B is relatively flat. In some embodiments, the front side  170 C extends downwardly from the top side  170 B. In some embodiments, the front side  170 C extends downwardly from the top side  170 B to a front region of the forward region  164 . In some embodiments, the protruding portion  170  is narrower than the width of the base  168  of the body. 
     In some embodiments, the front region of the forward region  164  of the body  1  extends at an angle upwardly from the base  168  of the body  1 . In certain configurations, the angled front region is aesthetically pleasing. In some embodiments, the angled front region enhances aerodynamics of the kart  100 . The angled front region can help to allow a user to more easily steer the kart  100 . 
     Seat 
     In some embodiments, the kart body  1  includes a seat  8 . The seat  8  can support a user. In some embodiments, the seat  8  can support the user in a seated position. The seat  8  can be positioned so that the user is readily able to operate the kart  100  (for example, by steering the kart  100 ). 
     In some embodiments, the seat  8  is fixed to the kart body  1 . In some embodiments, the seat  8  is removably attached to the kart body  1 . In some embodiments, the seat  8  is attached to the body  1  as low as possible and/or as close to a riding surface as possible. Positioning the seat  8  low relative to the riding surface can help to limit rolling to the side and/or help to inhibit the kart  100  from toppling on its side as the kart  100  is turned and/or tilted. As shown in  FIGS. 4 and 5 , in some implementations, the rear of the seat  8  comprises the rearmost end of the kart  100 . 
     In some embodiments, at least a portion of the seat  8  is connected to the raised region  166  of the body  1 . In some embodiment, the raised region  166  is elevated relative to the base of the body  1 . In some configurations, the raised region  166  can provide additional space to accommodate various sized users. Some embodiments can allow the user to more easily steer the kart  100  in use. 
     The seat  8  can include a rear portion  167 A and a base  167 B. In some embodiments, the rear portion  167 A can support the user&#39;s back. In some embodiments, the base  167 A can support a body of the user. In some embodiments, the base is connected to the body  1 . In some embodiments, all or a portion of the seat  8  is positioned lower than a steering wheel  7 . For example, in some embodiments, the base  167 B and/or the rear portion  167 A of the seat  8  is positioned lower than the steering wheel  7  of the steering assembly  150 . In some embodiments, the seat base  167 B can be positioned below the top side  170 B. In some embodiments, at least a portion of the seat base  167 B can be positioned below at least a portion of the pedal  21 . In some embodiments, at least a bottom of the seat base  167 B can be positioned below a top edge of the pedal  21 . In some embodiments, at least a portion of the rear portion  167 A is positioned below the top side  170 B and at least a portion of the rear portion  167 A is positioned above the top side  170 B. In some embodiments, the base  167 B is approximately aligned with the region where the front side  170 C meets the base  160 . In some embodiments, the base  167 B is positioned higher than the region where the front side  170 C meets the base  160 . In some embodiments, the base  167 B is positioned lower than the region where the front side  170 C meets the base  160 . In some embodiments, a top side of the rear portion  167 A is positioned above the opening of the top side  170 B and/or the base  167 B is positioned below the opening of the top side  170 B. In some embodiments, the top side of the rear portion  167 A is positioned approximately aligned with a lower side of the connection rack  22 . In some embodiments, the rear portion  167 A is positioned higher than the lower side of the connection rack  22 . In some embodiments, the seat  8  is positioned above the motor. In some embodiments, at least a portion of the seat  8  is positioned above a top side of at least one of the batteries  5 . In some embodiments, the base  167 B is positioned below the controller  6 . In some embodiments, the base  167 B is positioned approximately aligned with the controller  6 . In some embodiments, at least a portion of the seat  8  is positioned below the installation rack  9  and at least a portion of the seat  8  is positioned above the installation rack  9 . In some embodiments the seat base  167 B includes a lateral middle portion between opposite sides of the seat  8 . In some embodiments, the seat base  167 B includes lateral sides of the seat  8 . In some embodiments, the seat base  167 B includes the lateral sides of the seat  8  and the lateral middle portion of the seat  8 . In some variants, the seat base  167 B is located at and/or on the lateral midpoint of the seat  8 . In certain embodiments, the seat base  167 B is located at and/or on the longitudinal (front-to-back) midpoint of the seat  8 . 
     In some embodiments, the rear portion of the seat  8  is generally aligned with a rear side of the body  1 . In some embodiments, the rear portion of the seat  8  is generally aligned with a rear side of the raised region  166  of the body  1 . In some embodiments, the seat  8  and/or the raised region  166  is positioned inwardly from the rear end of the body  1 . For example, the seat  8  and/or the raised region  166  can be positioned spaced inwardly from the rear end of the body  1  by a lip. 
     As shown in  FIGS. 10 and 15 , in some embodiments, the kart body  1  can include one or more cavities, such as one or more storage compartments  140 ,  141 . In some embodiments, the kart body  1  includes at least one, two, three, four, five, or six or more storage compartments  140 ,  141 . In some embodiments, the storage compartments  140 ,  141  is the same size and/or a different size. In some embodiments, the storage compartments  140 ,  141  are positioned in the same orientation and/or a different orientation. In some embodiments, the at least one of the storage compartments  141  are aligned (e.g., approximately vertically aligned) with at least one of the storage compartments  140 . In some variants, the compartment  140  connects with the compartment  141 . In some embodiments, the storage compartment  141  forms a portion of the storage compartment  140 , such as a bottom portion that can be visible through a bottom of the kart body  1 . In some embodiments, the storage compartments  140 ,  141  are located in the rearward region of the kart  100 . For example, the storage compartments  140 ,  141  can be located in the rear half of the kart  100 . In some implementations, the storage compartments  140 ,  141  are rearward of the seat  8 , a battery  5 , and/or the front wheel  4 . As illustrated in  FIGS. 10 and 15 , in certain implementations, the cavities are substantially symmetrically located and/or shaped on either side of a longitudinal centerline of the kart  100 . In some embodiments, the storage compartments  140 ,  141  are located in the intermediate region and/or the forward region of the kart body  1 . The compartments can be forward of the rear wheels  154 . The compartments  140 ,  141  can be positioned partially or completely beneath the seat  8 . In some embodiments, one or more of the compartments  140 ,  141  include a cover, such as a lid. The cover can be removable. In some embodiments, one or more of the storage compartments  140 ,  141  are accessible via the bottom of the kart  100 . In some embodiments, one or more of the compartments  140 ,  141  is accessible by moving (e.g., pivoting) or removing the seat  8 . 
     In some embodiments, the storage compartments  140 , 141  form a hollow recess in the kart body  1 . In some embodiments, the storage compartments  140 ,  141  can be at least partially filled. In some embodiments, the storage compartments can include, or be configured to receive, a weight or other material to increase the overall weight of the kart  100  and/or to adjust the weight distribution of the kart  100 . In some embodiments, removal of the added weight can decrease the overall weight of the kart  100 . Some configurations having added weight can alter and/or enhance the user&#39;s riding performance. For example, in some configurations, the added or reduced weight helps to stabilize the kart  100  and/or distribute the weight of the user. In some embodiments, the storage compartments  140 ,  141  are accessible to add or reduce the additional weight. In some embodiments, the added weight stored in the storage compartments can be changed depending on the weight and/or size of the user. In some configurations, the added and/or reduced weight, and/or the positioning of the weight and/or storage compartments  140 ,  141  can allow the kart  100  to be turned more quickly and/or spin faster. For example, in some configurations, the added or reduced weight (and/or the positioning of the weight) can allow the kart  100  to be spun in 360 degrees at a faster rate. In some embodiments, the added or reduced weight stored in the storage compartments  140 ,  141  can allow the kart  100  to be steered more easily. In some embodiments, the added or reduced weight stored in the storage compartments can allow the kart  100  to speed up more quickly and/or more slowly. 
     Installation Slot 
     In some embodiments, the body  1  includes the intermediate region  162 . The intermediate region  162  can be positioned forward of the raised region  166 . In some embodiments, the intermediate region  162  extends from a front side of the seat  8  and/or the raised region  166 . In some embodiments, the intermediate region  162  transitions smoothly between the front side of the seat  8  and/or the raised region  166 . In some embodiments, a rear side of the intermediate region  162  is positioned below, above, and/or at the same elevation of the raised region  166 . In some embodiments, the intermediate region  162  is angled upwardly away from the raised region  166 . In some embodiments, the intermediate region  162  is angled upwardly away towards a front of the kart  100 . In some embodiments, a maximum width of the intermediate region  162  is narrower than a maximum width of the raised region  166 . In some embodiments, the intermediate region  162  is positioned centered along a longitudinal axis of the kart  100 . 
     As shown in  FIGS. 8 and 9 , in some embodiments, the intermediate region  162  includes an installation slot  2 . The installation slot  2  can include an opening. The installation slot  2  can be formed in the body  1 . For example, the installation slot  2  can form a recess in the body  1 . In some embodiments, the installation slot  2  can form a compartment in the body  1 . The installation slot  2  can extend inwardly from an upper surface of the intermediate region  162 . As described in more detail below, the installation slot  2  can house a power source (e.g., a battery  5 ), a controller  6 , and/or an installation rack  9 . 
     In some embodiments, the intermediate region  162  of the body  1  can include a cover body  3 . The cover body  3  can at least partially cover the opening of the installation slot  2 . In some embodiments, the cover body  3  can enclose the battery  5 , the controller  6 , and/or the installation rack  9 , among other components, within the installation slot  2 . 
     The cover body  3  can be connected to the intermediate region  162 . In some embodiments, the cover body  1  is pivotably connected to the intermediate region  162  at one end of the installation slot  2 . In some embodiments, the cover body  1  is pivotably connected to the intermediate region  162  at a rear end of the installation slot  2 . In some embodiments, the cover body  1  is pivotably connected to the intermediate region  162  at a front and/or side end of the installation slot  2 . 
     In some embodiments, the cover body  3  is connected to the body  1  by a rotatable fastener, such as a hinge or other fastener. The hinge can allow the cover body  3  to easily be opened and/or closed. The cover body  3  and/or rotatable fastener can allow the installation slot  2  to be easily accessed. Certain configurations can allow the battery  5  or the controller  6 , among other components housed within the installation slot  2  to be removed, replaced, and/or placed within the installation slot  2 . In certain configurations, the cover body  3  protects the battery  5 , the controller  6 , or other internal components housed within the installation slot  2  when the cover body  3  is at least partially and/or fully closed. 
     In some embodiments, the rotatable fastener is positioned at the rear side of the installation slot  2 . As shown, a first distance between a front end of the installation slot  2  and the steering assembly  150  can be positioned closer than a second distance between a rear end of the installation slot  2  and the seat  8 . The first distance being smaller than the second distance can provide a greater area for the cover body  3  to rotate between the installation slot  2  and the seat  8 . In some embodiments, the cover body  3  is positioned such that the cover body  3  rotates against the seat  8  with a larger angle when opened. In some such configurations, the larger rotation angle can allow for the internal contents of the installation slot  2  to be easily removed, replaced, and/or added. This can be more convenient to the user, can help the user more easily maintain the kart  100 , and/or can also allow the user to access the installation slot  2  and avoid contacting the steering assembly  150 . 
     The cover body  3  can form various shapes and can be sized to cover at least a portion of the installation slot  2 . In some embodiments, the cover body  3  is generally U-shaped. For example, the cover body  3  can include a top wall and at least two side walls that at least partially surround the installation slot  2 . In some embodiments, the side walls extend from the top wall of the cover body  3  to form the U-shape. Certain configurations of the cover body  3 , such as the U-shape, can provide an integral structure with the body  1 . In some configurations, the cover body  3  can form a generally smooth surface with the body  1  when closed. In certain configurations, the shape of the cover body  3  is aesthetically pleasing. 
       FIG. 8  illustrates a perspective view of the kart  100  showing the installation slot  2  in an opened position.  FIG. 9  illustrates a partial exploded view of the kart  100  showing the battery  5  and the controller  6 , with the installation slot  2  in the opened position. As mentioned above, the installation slot  2  can house at least a battery  5  and/or the controller  6 . The battery  5  and/or the controller  6  can be fixed to the body  1  within the installation slot  2  by various means. For example, the battery  5  and/or the controller  6  can be fastened to the installation slot  2  by clamping. Clamping the battery  5  and/or the controller  6  to the installation slot  2  can allow the battery  5  and/or the controller  6  to be more easily assembled or disassembled. Clamping the battery  5  and/or the controller  6  to the installation slot  2  can secure the battery  5  and/or the controller  6  to the body  1 . 
     In some embodiments, the battery  5  and/or the controller  6  are clamped to the body  1  by a clamping member  12 . The clamping member  12  can be shaped to conform to a side of the battery  5  and/or the controller  6 . In some embodiments, the clamping member  12  extends over at least a portion of a top and/or side of the battery  5  and/or the controller  6 . The clamping member  12  can extend over at least a central portion of the battery  5  and/or the controller  6 . The clamping member  12  can be secured to the body  1  by a fastener, such as a bolt  13 , among other fasteners. The fastener can removably secure the clamping member  12  to the body  1  and securely fasten the battery  5  and/or the controller  6  within the installation slot  2 . In certain configurations, the clamping member  12  compresses or compacts the battery  5  and/or the controller  6  between the clamping member  12  and the body  1 . The bolt  13  can adjust (e.g., increase and/or decrease) an amount of compression force applied to the battery  5  and/or the controller  6  to secure and/or release the battery  5  and/or the controller  6 . 
     In some embodiments, the kart  100  includes one or more batteries  5 . In some embodiments, the kart  100  includes one, two, three, four, five, or six or more batteries  5 . In some embodiments, the one or more batteries  5  can supply power to the motor at the same time and/or at different times (sequentially after each battery  5  is drained) In some embodiments, the kart  100  includes batteries  5  having various shapes, sizes, and/or orientations (e.g., one battery rotated 90 degrees relative to another battery). Having multiple batteries  5  can extend the length of time the kart  100  can be operated. In some embodiments, positioning the batteries  5  in various orientations (e.g., a first orientation and a second orientation that is different from the first orientation) can allow for at least two batteries  5  to be used. Some configurations can allow the kart  100  to have at least two batteries  5 , while maintaining consistency between the batteries  5  (e.g., the same battery type). Some configurations can allow the kart  100  to have at least two batteries  5 , while maintaining the generally continuous slope of the rear side  170 A. The bolt  13  can be positioned between the batteries  5 , as shown, in the front-to-back direction. Some embodiments include multiple instances of the same battery. The instances of the battery can be positioned in the same or different configurations. For example, in some variants, a first instance of the battery is positioned in a horizontal configuration and a second instance of the battery is positioned in a vertical configuration. In some implementations, a second instance of the battery is rotated (e.g., greater than or equal to about: 90°, 180°, or otherwise) relative to a first instance of the battery. 
     As mentioned above, the battery  5  can be positioned within the installation slot  2 . The battery  5  can supply power (e.g., electrical energy) to the motor to drive the kart  100 . In some embodiments, the battery  5  can be positioned rearward, forward, below, and/or above the seat  8 . In some embodiments, the battery  5  can be positioned rearward, forward, below, and/or above the protruding portion  170 . Positioning the battery  5  within the installation slot  2  can allow the battery  5  to be positioned closer to the motor. Because the battery  5  may be positioned close to the motor, less wiring may be required to electrically connect the battery  5  with the motor. This can help to save material and reduce the complexity of the wiring. Several configurations of the battery  5  may decrease the rate of electrical problems, such as short circuits and/or open circuits. 
     The kart  100  can include the controller  6 , such as a processor and memory. In some embodiments, the controller  6  communicates with one or more components through a wired connection or wireless connection, such as via wi-fi, Bluetooth®, etc. The controller  6  can control aspects of certain components of the kart  100 . The controller  6  can be used for controlling the kart  100  via programming, for example, starting, braking, speeding up and slowing down etc. In some embodiments, the controller  6  can be positioned at various locations on and/or in the kart  100 . As mentioned above, in some embodiments, the controller  6  can be positioned within the installation slot  2 . 
     Pedal 
     In some embodiments, the kart  100  includes a motor control, such as a pedal  21 . The pedal  21  can be connected to the body at the forward region  164  of the body  1 . In some embodiments, the pedal  21  is mounted at least partially along the angled front side of the forward region  164  of the body  1 . This can allow the user to more easily access the pedal  21 . In some variants, the motor control comprises other structures, such as a trigger, switch, handgrip, or otherwise. 
     The pedal  21  can include a foot placement portion and a mount. One end of the foot placement portion can be articulated with respect to the mount. The foot placement portion can maintain a certain angle with respect to the mount in the absence of external force applied to the pedal  21 . In some embodiments, the pedal  21  can rotate with respect to the mount. 
     In some embodiments, the pedal  21  can maintain a specified angle via a reset or biasing mechanism. The reset mechanism can include a spring, such as a torsion spring. The foot placement portion can rotate and maintain a preset angle with the mount due to the force of the torsion spring, for example. The torsion spring can be convenient for installation. In some configurations, other reset mechanisms can be used to maintain the angle between the pedal foot placement portion of the pedal  21  and the mount when the foot placement portion is not depressed. 
     In some configurations, a distance between the mount and the foot placement portion can be shortened after the user steps on the foot placement portion. In some embodiments, the foot placement portion can be restored to the initial state via the reset mechanism (e.g., the preset angle) after the user releases the pedal  21  (e.g., the user is applying no force or a limited amount of force to the foot placement portion). 
     In some configurations, the pedal  21  includes a sensor. The sensor can be connected to the controller  6 . The sensor can detect a signal (e.g., a displacement signal). The displacement signal can detect how much the pedal  21  is pushed (e.g., downwardly) by the user. For example, detection of displacement of the pedal  21  can be measured by the sensor. Initially, the foot placement portion can be at an initial position when no external force, such as by the user&#39;s foot, is applied. The foot placement portion can start to rotate as the user applies a force to the foot placement portion, thus displacing the foot placement portion from the initial position. The sensor can detect the displacement of the foot placement portion of the pedal  21  and can send the displacement signal to the controller  6  of the kart  100 . The controller  6  can, on the basis of the displacement signal received from the sensor, control the speed of the kart  100 . 
     The relationship between the displacement signal indicating the travel of the foot placement portion and the desired speed of the kart  100  can be pre-stored in the controller  6 . Upon receiving the displacement signal, the controller  6  can control the motor  190  to rotate according to corresponding speed so as to drive the wheel to run at the prospective speed. The relationship between the speed and displacement of the pedal  21  can be directly proportional. For example, in some configurations, the speed increases as the displacement increases. In this way, the user can increase foot pressure on the pedal  21  (resulting in greater displacement of the pedal  21 ) to speed up the kart  100  and decrease foot pressure to slow down the kart  100 . Several such configurations can conveniently control acceleration and/or deceleration of the kart  100 . The pedal  21  can control acceleration and/or deceleration, help to avoid interference with manual adjustment of kart direction, prevent mutual influence between speed regulation and steering, improve the operational performance of the kart  100 , and/or improve the driving experience to the user, among other benefits. 
     In some embodiments, the pedal  21  is wirelessly connected to the controller  6 . For example, as mentioned above, the pedal  21  can be toggled by the user to increase or decrease the speed of the motor  190  to increase or decrease the speed of the kart  100 . When the pedal  21  is toggled by the user, the motor  190  and/or the pedal  21  can be configured to instruct a controller  6  to supply power to the motor  190 . For example, the controller  6  can instruct the motor  190  to drive the wheel in response to and/or consistent with the signal from the pedal  21 . While control of the kart  100  can be wireless via the pedal  21 , some variants have wired connections to connect a throttle, brake, and an on/off switch to the motor  190 , as discussed above. Any wired or wireless protocol may be used. 
     Installation Rack 
     As previously mentioned, the kart  100  can include an installation rack  9 . The installation rack  9  can be positioned at least partially within the installation slot  2 . The installation rack  9  can be secured to the body  1  by a fastener  13 , such as a mechanical fastener or an adhesive. The installation rack  9  can include a power switch  10 . In some embodiments, the power switch  10  can be positioned along or within the installation rack  9 . In some embodiments, the power switch  10  can extend through the cover body  3  (see  FIG. 1 ). In some embodiments, activation of the power switch  10  can instruct the battery  5  to supply power to the motor  190 . In some embodiments, the switch  10  can be activated by pressing the switch  10 . In some embodiments, the switch  10  can be activated wirelessly, such as via wi-fi, Bluetooth®, mobile application, etc. For example, in some embodiments, the kart  100  includes a wired and/or wireless pedal  21  or the switch  10 , as discussed above. 
     In some embodiments, the installation rack  9  can include a charging port  11 . The charging port  11  can allow the battery  5  to be charged. In some embodiments, the charging port  11  allows the battery  5  to be charged without removal of the battery  5 . In some embodiments, the charging port  11  can be positioned along or within the installation rack  9 . In some embodiments, the charging port  11  is positioned adjacent the power switch  10 . For example, the charging port  11  can be positioned along a side of the power switch  10 . 
     The installation rack  9 , which can include the power switch  10  and/or the charging port  11 , can be positioned forward of the seat  8 . Several configurations can be convenient to the user during operation. Several configurations can decrease the wiring distance between the charging port  11  and the battery  5 . Some configurations can decrease materials and/or cost. Some configurations can allow for a standardized and/or optimized wiring layout. This can help to limit or avoid short circuits, open circuits, and/or the like. 
     Wheels 
     As shown in at least  FIGS. 1-9 , the kart  100  can include a plurality of wheels. In some embodiments, the kart  100  includes at least one front wheel  4  and at least one rear wheel  154 . In some embodiments, the at least one front wheel  4  and/or the at least one rear wheel  154  is a caster wheel. The caster wheel can be dynamically engaged to induce and control drift during a turn. In some embodiments, the caster wheel can swivel to constantly maintain contact with the riding surface during a turn. In some embodiments, the caster wheel includes a wheel configured to rotate around an axis of rotation and swivel about a swivel axis. In some embodiments, the axis of rotation is different from the swivel axis. In some embodiments, the axis of rotation is approximately parallel to the riding surface upon which the kart  100  rolls over. The caster wheel can include a fork supporting the wheel, which can allow the wheel to swivel around the swivel axis. When the caster wheels of the kart  100  contact the rolling surface and the caster wheels are free to swivel around their swivel axes, the caster wheels are considered “engaged” and the kart  100  can be steered into a turn. A caster wheel can be “disengaged” to steer the kart  100  normally by either limiting the extent to which the caster wheel can swivel or by shifting the caster wheel (e.g., by tilting the kart  100 ) so that the wheel does not contact the track surface. 
     The caster wheels can generally be constructed from high performance casters that include polyurethane wheels mounted to a caster fork via at least one bearing press fitted to the wheel. In some embodiments, the wheels have a 68 mm radius and the bearings are BSB ABEC 7 bearings. Other casters appropriate to the application can be used. 
     In some embodiments, the swivel axis of the caster wheels can rotate between a rake of 33 degrees and 0 degrees to vertical to control the amount of drift that is allowed. In some embodiments, the extent to which the swivel axis of the caster wheels can rotate relative to vertical is determined by the amount of drift or turn desired in the specific application. In some embodiments, the swivel axis is generally perpendicular to the axis of rotation and/or to a longitudinal axis of the kart  100 . 
     In some embodiments, the kart  100  includes at least one, two, three, four, five, or six or more rear wheels  154 . The rear wheels  154  can be mounted to the body  1 . In some embodiments, the rear wheels  154  can be mounted to the body  1  below the rearward region  160  of the body  1 . In some embodiments, the rear wheels  154  are mounted below the seat  8  and/or the raised region  166 . In some embodiments, the rear wheels  154  are mounted to the body  1  at a position that is spaced laterally outward from the seat  8  and/or the raised region  166 . 
     In some embodiments, the rear wheels  154  can be positioned in a neutral position. For example, in the neutral position, the axis of rotation of the rear wheels  154  may be approximately perpendicular to the longitudinal axis of the body  1 . In some embodiments, in the neutral position, at least a portion of the rear wheels  154  extends rearwardly beyond the rear side of the body. In some embodiments, in the neutral position, the rear wheels  154  are positioned entirely below the body. In some embodiments, the rear wheels  154  include a biasing mechanism to bias the wheels into the neutral position. 
     In some embodiments, the kart  100  includes at least one, two, three, four, five, or six or more front wheels  4 . In some embodiments, at least one of the one or more front wheels  4  is powered, such as by a motor  190  (e.g., a hub motor  190 ). In some variants, the front wheel  4  can be non-powered. The at least one rear wheel  154  can be powered or non-powered. In certain embodiments, the front wheel  4  and the at least one rear wheel  154  are powered. The kart  100  can be front wheel driven and/or a rear wheel driven. For example, in some embodiments, the front wheel  4  is the driving wheel. 
     The kart  100  can include the front wheel  4 . The front wheel  4  can be positioned below the forward region  164  of the body  1 . In some embodiments, the front wheel  4  can be positioned centrally located along the longitudinal axis of the body  1 . In some embodiments, the front wheel  4  can be powered by the motor  190 . For example, the front wheel  4  can be powered by a hub motor arrangement, including a hub motor  190 . The hub motor  190  can be integrated with and/or form a portion of the front wheel  4 . The hub motor  190  can desirably simplify the structure of the kart  100 . In some embodiments, the hub motor  190  increases the portability of the kart  100 . In some embodiments, the hub motor  190  allows the body  1  to be more flexible. 
     In some embodiments, the hub motor arrangement powers at least one of the plurality of wheels (e.g., a motor  190  integrated with the front wheel  4  or the rear wheel  154 ). The hub motor arrangement can include a body or housing, which at least partially encloses the motor  190  and transmission assembly. In some embodiments, a tire or other traction element that contacts a surface upon which the kart  100  is ridden is adjacent to or is directly carried by the housing. A diameter of the traction element can be similar to or slightly larger than a diameter of the housing. In some embodiments, no substantial structural elements (e.g., spokes and rim) are provided between the housing and the traction element. The hub motor arrangement can be well-suited for small diameter wheel applications, such as ride-on vehicles for children, such as the kart  100  illustrated in the embodiments discussed herein, 
     The motor  190  can be a standard, commercially-available small DC brush motor. The kart  100  can include a transmission assembly that is configured to convert the speed and torque of the motor into a speed and torque suitable for the front wheel  4 . In some variants, the motor and transmission assembly are configured for accommodation in a housing that is suitably sized and shaped. The motor  190  can be positioned along a center axis of the hub motor arrangement and/or offset axially or laterally to one side of a central plane of the hub motor arrangement or of the traction element. In some configurations, the motor is off-center and/or spaced from the center axis of the hub motor arrangement. A portion of the motor  190  (e.g., an output shaft) can be supported and/or journaled in one or both of a support bearing for the housing and a mount of the hub motor arrangement. In some embodiments, the mount of the hub motor arrangement can include the fork, as described herein. In some arrangements, a portion of the motor  190  is laterally or axially inboard of the support bearing and/or mount that is nearest the motor  190  (if multiple bearings/mounts are provided) and a portion of the motor  190  is laterally or axially outboard of the support bearing and/or mount. In several embodiments, a standard motor can be used along with a transmission assembly suitable to convert the power of the motor into suitable drive power for the rear driving wheel arrangement to provide a relatively low-cost drive system for small or child vehicle applications, including the powered mobility system. In addition, such an arrangement preserves space for the transmission of the hub motor arrangement. 
     In some embodiments, the hub motor arrangement is not a through-shaft type of arrangement in which an axle member or arrangement passes completely through the center of the hub motor  190 , but is a distributed axle arrangement that provides suitable support while permitting the motor  190  to be centrally-located or generally aligned with a central, rotational axis of the hub motor arrangement and to occupy a portion of the axis of rotation. That is, the motor  190  is not a hollow design that surrounds the axis of rotation. Such an arrangement provides a well-balanced hub motor arrangement while permitting the use of a standard, commercially-available “off-the-shelf” motor to keep costs low. In some embodiments, when incorporated into the associated powered mobility system, both sides of the hub motor arrangement may be supported. In some embodiments, the axle supports only one side of the hub motor arrangement. For example, the axle may extend partially inboard the housing of the hub motor and partially outboard the motor  190  on one side of the hub motor arrangement. Although through-shaft type axle designs can also permit a motor to be generally aligned with a central, rotational axis of a motor, such an arrangement would require a custom motor design or at least a large motor design because the axle needs to be sufficient to support a substantial portion of the weight of the kart  100 . In the illustrated arrangement, the shaft of the motor may not support any significant weight of at least a portion of the kart  100 . In some configurations, the motor could be completely outside of the housing and/or an outside bearing or completely within the housing and/or inboard of the bearing, depending on factors such as the amount of space available, especially in a width direction (along the center or rotational axis). In some configurations, the motor  190  is reasonably accessible without significant disassembly of the hub motor arrangement. For example, in some configurations, the motor  190  can be positioned partially within the housing and/or extend partially outside of the housing. In some configurations, at least a portion of the motor is positioned inboard of the housing and/or within the housing and at least a portion of the motor  190  is located outboard of the housing and/or outside of the housing. Additional details and features related to hub motors can be found in U.S. Pat. No. 9,660,500, filed on Jun. 27, 2014, and U.S. Pat. No. 9,638,285, filed on May 12, 2015, each of which are hereby incorporated by reference in their entirety. 
     Steering Assembly 
     The front wheel  4  can be connected to the body  1  via the steering assembly  150 . The steering assembly  150  can be connected to the body  1  through an opening in at least a portion of the body  1 . For example, the steering assembly  150  can be connected to the body  1  through an opening in the protrusion portion of the body  1 . The positioning of the steering assembly  150  can allow the user to comfortably steer the kart  100  when the user is sitting in the seat  8 . In some embodiments, the steering assembly  150  allows the kart  100  to be rotated or turned at least 360 degrees. 
       FIG. 12  illustrates an exploded view of the steering assembly  150 . In some embodiments, the steering assembly  150  includes a steering wheel  7 , a steering component  25 , and/or the front wheel  4 . 
     In some embodiments, the steering wheel  7  can be turned by the user to change a direction of the front wheel  4 , causing the kart  100  to turn. In some embodiments, turning the steering wheel  7  can cause the kart  100  to rotate. In some embodiments, the steering wheel  7  can be rotated at least 360 degrees. In some embodiments, the steering wheel  7  can be turned to cause the kart  100  to spin in a clockwise and/or counterclockwise direction. In some embodiments, the steering assembly  150  includes a biasing mechanism to return the steering assembly  150  (including the steering wheel  7 ) to the neutral position. 
     In some embodiments, the steering wheel  7  can include a top cover  14  and a bottom cover  16 . The top cover  14  and/or the bottom cover  16  can be ring-shaped. However, other shapes are contemplated, such as square-shaped, rectangular shaped, or oval shaped. In some embodiments, the top cover  14  and/or the bottom cover  16  are shaped to correspond to one another. 
     The top cover  14  and the bottom cover  16  can be connected through various connection means. In some embodiments, the top cover  14  and the bottom cover  16  can be connected by a snap-fit, screw-fit, and/or a press-fit arrangement. In some embodiments, the steering wheel  7  forms a hollow structure when the top cover  14  is connected to the bottom cover  16 . 
     In some embodiments, the top cover  14  and/or the bottom cover  16  can include corresponding engagement features. For example,  FIG. 13  illustrates a close-up view of part A, showing an embodiment of the top cover  14 . As illustrated, the top cover  14  includes a fixture block  15 . The fixture block  15  can form a protrusion that extends outwardly from the top cover  14 . 
       FIG. 14  illustrates a close-up view of part B, showing an embodiment of the bottom cover  16 . As shown, the bottom cover  16  can include a card slot  17 . The card slot  17  can form an opening in the bottom cover  16 . The card slot  17  can be configured to receive at least a portion of the top cover  14 , such as the fixture block  15 . In some examples, the fixture block  15  can extend into the card slot  17  to secure the top cover  14  to the bottom cover  16 . In some embodiments, the card slot  17  can clamp the fixture block  15  within the card slot  17  to retain and/or secure the bottom cover  16  to the top cover  14 . The engagement features can allow the steering wheel  7  to be more easily assembled and/or disassembled. 
     In some embodiments, at least a portion of the steering wheel  7  includes plastic, among other materials. The plastic material can help to decrease the weight of the steering wheel  7 . This can help to decrease the overall weight of the kart  100 . Some such configurations can help to reduce the driving load, which as described above, can enhance battery life, reduce wear and tear on the kart  100 , and/or increase the life-span of certain components, among other things. Some configurations can also help to reduce the amount of material required to form the kart  100 . 
     In some embodiments, the steering wheel  7  includes an insert (not shown) positioned within the hollow interior space of the steering wheel  7 . In some embodiments, the insert can be positioned between the top cover  14  and the bottom cover  16  when assembled. In some embodiments, the insert can be attached to an inner surface of one or more of the top cover  14  and the bottom cover  14 . In some embodiments, the insert wraps around at least a portion of the inner surface of one or more of the top cover  14  and the bottom cover  14 . The insert can provide additional structure support to the steering wheel  7 . In some embodiments, the insert can include metal and/or plastic to provide additional support to the steering wheel  7 . In some embodiments, the insert includes metal wrapped with plastic, among other materials. 
     Referring to  FIG. 12 , the steering wheel  7  can be connected with the front wheel  4  by the steering component  25 . The steering component  25  can include a connection rack  22 , a connecting rod  19  and/or a fork  20 . 
     In some embodiments, the connection rack  22  can be positioned within an interior space of at least a portion of the bottom cover  16 . In some embodiments, the connection rack  22  is integrally formed with the bottom cover  16 . In some embodiments, the connection rack  22  can be connected with the connecting rod  19  by a mechanical fastener, such as a bolt  18 . The bolt  18  can secure the steering wheel  7  to the connecting rod  19 . In some embodiments, the connection rack  22  can include a protrusion (not shown). The protrusion can connect with one or more other portions of the steering assembly  150 , as described in more detail below. 
     The connecting rod  19  can include various shapes, such as cylindrical, rectangular, or square, among other shapes. In some embodiments, the connecting rod  19  includes a groove (not shown). In some embodiments, the groove of the connecting rod  19  can receive at least a portion of the protrusion of the connection rack  22 . In several configurations, the connection between the groove and the protrusion can secure the steering wheel  7  to the connecting rod  19 . In some embodiments, the connection between the groove and the protrusion can provide additional support to the structure of the steering assembly  150  to increase the firmness of the steering assembly  150 , and/or enhance operating performance, among other benefits. 
     The connecting rod  19  can be connected to a fork  20 . In some embodiments, the connecting rod  19  is integrally formed with the fork  20 . The fork  20  can be substantially U-shaped. In some embodiments, the fork  20  can surround at least a portion of the front wheel  4  to secure the front wheel  4  to the steering wheel  7 . In some embodiments, the fork  20  includes a first side and a second side. In some embodiments, the first side and the second side of the fork  20  include the same or similar shapes. In some embodiments, the first side and the second side of the fork  20  include different shapes. In some embodiments, the second side is approximately flat. In some embodiments, the second side of the fork  20  extends downwardly. In several configurations, the first side of the fork  20  has an upper portion and a lower portion. In some embodiments, the upper portion is approximately parallel to the second side. In some embodiments, the lower portion extends outwardly away from the upper portion. In some embodiments, the lower portion is contoured to match the shape of the hub motor  190  of the front wheel  4 . In some embodiments, the first side includes a first set of prongs and the second side includes a second set of prongs. The first set of prongs can be configured to receive and/or secure one side of the front wheel  4  and/or hub motor  190 , such as the axle. In some embodiments, the second set of prongs can be configured to receive and/or secure another side of the front wheel  4  and/or hub motor  190 , such as another portion of the hub motor  190 . In some embodiments, a recess  144  between adjacent prongs of the first set of prongs can be narrower than a recess  142  between adjacent prongs of the second set of prongs. In some embodiments, the recess  144  is smaller than the recess  142 . In some embodiments, the recess  144  is the same size as or larger than the recess  142 . 
     Anti-Sway Features 
       FIG. 15  shows a bottom perspective view of the kart  100 . One or more sides of the body  1  can be provided respectively with an anti-sway feature  180  and/or anti-roll feature  180 . In some embodiments, the anti-sway feature  180  does not contact and/or impact the rolling surface when the kart  100  is in normal operation (e.g., moving straight ahead). In some embodiments, when the kart  100  is positioned approximately horizontal and/or parallel to the rolling surface, and supported by one or more of the front wheel  4  and/or the rear wheels  154 , the anti-sway features  180  extend from the body  1  and are spaced apart from the riding surface. In this state of the kart  100 , the anti-sway features  180  do not influence operation of the kart  100 . For example, the anti-sway features do not drag along the riding surface. In some embodiments, when the kart  100  inclines or tilts to a certain angle from side to side, one or more of the anti-sway features  180  can engage (e.g., touch) the rolling surface. This can help to prevent the kart  100  from further inclination or tilting and possible toppling when the kart  100  turns. The anti-sway features  180  can be advantageous, for example, for karts provided with only one front wheel  4  and/or only one rear wheel  154 . The selected distance from the anti-sway feature  180  to the rolling surface can be designed on the basis of a desired anti-sway angle. The anti-sway features  180  can be connected to the bottom of the body  1 , so as to not influence the overall appearance of the kart  100 . In some embodiments, the lowermost part of the anti-sway features  180  is within the diameter of the front wheel and, as shown, for example, in  FIGS. 3 and 4 . 
     The anti-sway features  180  can be arranged at the forward region  164  of the kart  100 . In some embodiments, the anti-sway features  180  are positioned at the rearward region  160  of the kart  100 . In some embodiments, the forward region  164  of the kart  100  is prone to tipping if the kart  100  inclines during running. To inhibit or prevent the kart  100  from tipping over, the anti-sway features  180  can be located at the forward region  164  of the kart  100 . In some variants, the anti-sway features  180  can be arranged at a distance behind at least a portion of the front wheel  4  (e.g., a front edge of the wheel). Some configurations may not only inhibit, limit, or prevent a rollover, but can effectively inhibit, limit, or prevent the kart  100  from tipping forward. 
     Certain Terminology 
     Certain terminology may be used in the description for the purpose of reference only, and thus is not intended to be limiting. For example, terms such as “above” and “below” refer to directions in the drawings to which reference is made. Terms such as “front,” “back,” “left,” “right,” “rear,” and “side” describe the orientation and/or location of portions of the components or elements within a consistent but arbitrary frame of reference which is made clear by reference to the text and the associated drawings describing the components or elements under discussion. Moreover, terms such as “first,” “second,” “third,” and so on may be used to describe separate components. Such terminology may include the words specifically mentioned above, derivatives thereof, and words of similar import. 
     Conditional language used herein, such as, among others, “can,” “could,” “might,” “may,” “e.g.,” and the like, unless specifically stated otherwise, or otherwise understood within the context as used, is generally intended to convey that certain embodiments include, while other embodiments do not include, certain features, elements and/or states. Thus, such conditional language is not generally intended to imply that features, elements and/or states are in any way required for one or more embodiments or that one or more embodiments necessarily include logic for deciding, with or without author input or prompting, whether these features, elements and/or states are included or are to be performed in any particular embodiment. 
     The singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to an item includes reference to one or more items. The term “ones” refers to one, two, or more, and generally applies to the selection of some or all of a quantity. The term “plurality” refers to two or more of an item. The term “about” or “approximately” means that quantities, dimensions, sizes, formulations, parameters, shapes and other characteristics need not be exact, but may be approximated and/or larger or smaller, as desired, reflecting acceptable tolerances, conversion factors, rounding off, measurement error and the like and other factors known to those of skill in the art. 
     Numerical data may be expressed or presented herein in a range format. It is to be understood that such a range format is used merely for convenience and brevity and thus should be interpreted flexibly to include not only the numerical values explicitly recited as the limits of the range, but also interpreted to include all of the individual numerical values or sub-ranges encompassed within that range as if each numerical value and sub-range is explicitly recited. As an illustration, a numerical range of “about 1 to 5” should be interpreted to include not only the explicitly recited values of about 1 to about 5, but should also be interpreted to also include individual values and sub-ranges within the indicated range. Thus, included in this numerical range are individual values such as 2, 3 and 4 and sub-ranges such as “about 1 to about 3,” “about 2 to about 4” and “about 3 to about 5,” “1 to 3,” “2 to 4,” “3 to 5,” etc. This same principle applies to ranges reciting only one numerical value (e.g., “greater than about 1”) and should apply regardless of the breadth of the range or the characteristics being described. 
     A plurality of items may be presented in a common list for convenience. However, these lists should be construed as though each member of the list is individually identified as a separate and unique member. Thus, no individual member of such list should be construed as a de facto equivalent of any other member of the same list solely based on their presentation in a common group without indications to the contrary. Furthermore, where the terms “and” and “or” are used in conjunction with a list of items, they are to be interpreted broadly, in that any one or more of the listed items may be used alone or in combination with other listed items. The term “alternatively” refers to selection of one of two or more alternatives, and is not intended to limit the selection to only those listed alternatives or to only one of the listed alternatives at a time, unless the context clearly indicates otherwise. 
     The terms “approximately,” “about,” and “substantially” as used herein represent an amount close to the stated amount that still performs a desired function or achieves a desired result. For example, in some embodiments, as the context may dictate, the terms “approximately”, “about”, and “substantially” may refer to an amount that is within less than or equal to 10% of the stated amount. The term “generally” as used herein represents a value, amount, or characteristic that predominantly includes, or tends toward, a particular value, amount, or characteristic. For example, as the context may dictate, the term “generally parallel” can mean something that departs from exactly parallel by less than or equal to 15°. Furthermore, as the context may dictate, the term “generally perpendicular” can mean something that departs from exactly, perpendicular by less than or equal to 15°. Furthermore, as the context may dictate, the term “generally aligned” can mean something that departs from exactly, aligned by less than or equal to 150. 
     Overall, the language of the claims is to be interpreted broadly based on the language employed in the claims. The language of the claims is not to be limited to the non-exclusive embodiments and examples that are illustrated and described in this disclosure, or that are discussed during the prosecution of the application. 
     CONCLUSION 
     Various karts have been disclosed in the context of certain embodiments and examples above. However, this disclosure extends beyond the specifically disclosed embodiments to other alternative embodiments and/or uses and obvious modifications and equivalents thereof. In particular, while the karts have been described in the context of illustrative embodiments, certain advantages, features, and aspects of the karts may be realized in a variety of other applications. Various features and aspects of the disclosed embodiments can be combined with or substituted for one another in order to form varying modes of the improvements. The scope of this disclosure should not be limited by the particular disclosed embodiments described herein. 
     Additionally, various aspects and features of the embodiments described can be practiced separately, combined together, or substituted for one another. A variety of combination and subcombinations of the disclosed features and aspects can be made and still fall within the scope of this disclosure. Certain features that are described in this disclosure in the context of separate implementations can also be implemented in combination in a single implementation. Conversely, various features that are described in the context of a single implementation can also be implemented in multiple implementations separately or in any suitable subcombination. Although features may be described above as acting in certain combinations, one or more features from a claimed combination can, in some cases, be excised from the combination, and the combination may be claimed as any subcombination or variation of any subcombination. 
     Some embodiments have been described in connection with the accompanying drawings. The figures are drawn to scale, but such scale should not be interpreted as limiting, since dimensions and proportions other than what are shown are contemplated and are within the scope of this disclosure. Distances, angles, etc. are merely illustrative and do not necessarily bear an exact relationship to actual dimensions and layout of the devices illustrated. Components can be added, removed, and/or rearranged. Further, the disclosure herein of any particular feature, aspect, method, property, characteristic, quality, attribute, element, or the like in connection with various embodiments can be used in all other embodiments set forth herein. Additionally, any methods described herein may be practiced using any device suitable for performing the recited steps. 
     In summary, various embodiments and examples of karts have been disclosed. Although the improvements have been disclosed in the context of those embodiments and examples, this disclosure extends beyond the specifically disclosed embodiments to other alternative embodiments and/or other uses of the embodiments, as well as to certain modifications and equivalents thereof. This disclosure expressly contemplates that various features and aspects of the disclosed embodiments can be combined with, or substituted for, one another. Thus, the scope of this disclosure should not be limited by the particular embodiments described above, but should be determined only by a fair reading of the claims that follow.