EP3083385A1

EP3083385A1 - Electric scooter

Info

Publication number: EP3083385A1
Application number: EP14827645.4A
Authority: EP
Inventors: Jack B. Lovley; Joseph C. Klingl; Mark Groenhuyzen; Kenneth Edlauer
Original assignee: Bravo Sports Corp
Current assignee: Bravo Sports Corp
Priority date: 2013-12-18
Filing date: 2014-12-17
Publication date: 2016-10-26
Also published as: AU2014351101A1; AU2019202028A1; WO2015095368A1; AU2016250401A1; CN105189274A

Abstract

A scooter having one or two front wheels, a rear wheel, a deck, an electric motor configured to provide power, and a transmission configured to transfer the power provided by the electric motor. In some configurations, the scooter includes a battery, a power switch, and a controller coupled to the power switch, the battery, and the electric motor. In response to receiving a signal from the power switch, the controller ramps up the voltage provided to the electric motor over an interval of time. In some configurations, the frame comprises a plurality of frame members arranged to form at least two or more vertical planes on one or both lateral sides of the scooter. In some configurations, the rear foot brake is linked to a front brake and configured to actuate the front brake of the front wheel and apply a braking force to the rear wheel simultaneously.

Description

ELECTRIC SCOOTER

BACKGROUND

Field

[0001] The invention disclosed herein relates generally to electric scooter assemblies, including children's three- wheeled electric scooter assemblies.

Description of the Related Art

[0002] Many types of scooters exist, including three-wheeled scooters and electric scooters. Three-wheeled scooters can be advantageous for young children to avoid or lessen the need to balance the scooter. Providing powered movement for a vehicle, such as scooters and other vehicles powered by an electric motor, can also be used to improve the user experience for children. A need exists for improved three- wheeled electric scooters or at least new designs to provide the consumer with a useful choice.

SUMMARY

[0003] The systems, methods and devices described herein have innovative aspects, no single one of which is indispensable or solely responsible for their desirable attributes. Without limiting the scope of the claims, some of the advantageous features will now be summarized.

[0004] In an embodiment, a scooter can generally comprise at least two front wheels, a rear wheel, a deck, a steering assembly that includes a handlebar and a steering tube, an electric motor configured to provide power, and a transmission configured to transfer the power provided by the electric motor. Preferably, the deck is configured to support the weight of at least a child. In other embodiments, the deck can be configured to support the weight of an adolescent or adult. The at least two front wheels can be coupled to the steering assembly to assist in steering. The transmission can be configured to transfer the power provided by the electric motor only to the rear wheel.

[0005] In some embodiments, the rear wheel and the electric motor can both be located on a same side relative to the transmission. In other embodiments, the rear wheel can be located on a first side relative to the transmission, and the electric motor can be located on a second side relative to the transmission, wherein the first side and second side are different. [0006] The steering assembly can further include a power switch coupled to the handlebar. The power switch can be used to turn on the electric motor. A control wire coupled to the power switch and the electric motor can be located at least partially within an interior of the steering tube.

[0007] In some configurations, a scooter includes at least two front wheels, a rear wheel, a steering assembly comprising a handlebar and a steering tube coupled to the at least two front wheels, a deck configured to support the weight of a child, an electric motor configured to provide power, and a transmission configured to transfer power provided by the electric motor to the rear wheel.

[0008] In some configurations, the rear wheel and electric motor are both located on a same side of the transmission.

[0009] In some configurations, the electric motor is located approximately in line with the rear wheel in a lateral direction of the scooter.

[0010] In some configurations, the scooter includes a battery. The electric motor can be positioned between the battery and the rear wheel in a lengthwise direction of the scooter.

[0011] In some configurations, the battery is surrounded by frame members on front, rear, right and left sides of the battery.

[0012] In some configurations, a transmission casing at least partially encloses one or more transmission gears, wherein the electric motor is coupled to and supported by the casing.

[0013] In some configurations, the transmission comprises a drive element for driving the rear wheel, wherein the electric motor is at a first end of the transmission casing and the drive element is at a second end of the transmission casing in a lengthwise direction of the scooter.

[0014] In some configurations, a power switch is coupled to the handlebar and a control wire coupled to the power switch. The control wire is at least partially within an interior of the steering tube.

[0015] In some configurations, the scooter includes a battery, a power switch, and a controller coupled to the power switch, the battery, and the electric motor. In response to receiving an on-signal from the power switch, the controller is configured to ramp up the voltage provided to the electric motor over an interval of time.

[0016] In some configurations, the interval of time is at least one second.

[0017] In some configurations, the interval of time is about two seconds.

[0018] In some configurations, the power switch is a binary switch. [0019] In some configurations, the controller is configured to, upon actuation of the power switch, initially limit the voltage provided by the electric motor to the motor to a predetermined fraction of the full power for a pre-specified amount of time.

[0020] In some configurations, a method of controlling an electric scooter includes receiving an on-signal from a user control, ramping up a voltage applied to an electric motor over an interval of time in response to the on-signal, and using power from the electric motor to drive a wheel of the scooter.

[0021] In some configurations, the interval of time is at least one second.

[0022] In some configurations, the interval of time is about two seconds.

[0023] In some configurations, the on-signal is a binary signal.

[0024] In an embodiment, a scooter can generally comprise a front wheel, a rear wheel, a rear foot brake, a deck, a frame, and a steering assembly that includes a handlebar and a steering tube. Preferably, the deck is configured to support the weight of at least a child. In other embodiments, the deck can be configured to support the weight of an adolescent or adult. The front wheel can be coupled to the steering assembly to assist in steering. The rear foot brake can be configured to engage braking of at least one or both of the rear wheel and front wheel.

[0025] Preferably, the frame is configured to support at least the deck. In an embodiment, the frame can include multi-planar elements. For example, the frame can include a plurality of frame members that comprise a visible exoskeleton.

[0026] The scooter can further include a battery and an electric motor. A throttle cable can be coupled between the handlebar and the electric motor. The throttle cable can be at least partially hidden within an interior of the steering tube.

[0027] In some configurations, a scooter comprises a front wheel and a rear wheel. A steering assembly includes a steering tube and a handlebar. A rear foot brake is configured to apply a braking force to at least one of the front wheel and the rear wheel. A deck is configured to support the weight of a person. A frame is configured to support the deck. The frame comprises a plurality of frame members arranged to form at least two or more vertical planes on one lateral side of the scooter.

[0028] In some configurations, the scooter further comprises an electric motor, a battery, and a throttle cable coupled to the handlebar and the electric motor. The throttle cable is at least partially hidden within an interior of the steering tube.

[0029] In some configurations, the scooter further comprises a transparent chain guard. [0030] In some configurations, the scooter further comprises a speedometer.

[0031] In some configurations, the rear foot brake is configured to actuate a front brake of the front wheel and apply the braking force to the rear wheel simultaneously.

[0032] In some configurations, the frame comprises a front portion and a rear portion, wherein the front portion defines a pair of vertical planes that diverge in a forward to rearward direction.

[0033] In some configurations, the rear portion defines a pair of vertical planes that converge in a forward to rearward direction.

[0034] In some configurations, a forward end of the deck is positioned forward of a junction between the front portion and the rear portion of the frame.

[0035] In some configurations, at least one plate extends in a lateral direction from one side of the frame to the other side of the frame. The at least one plate is coupled to each side of the frame.

[0036] In some configurations, the at least one plate comprises an upper plate on an upper side of the frame and a lower plate on a lower side of the frame.

[0037] In some configurations, each portion of the frame that defines a plane comprises a first member, a second member, a third member and a fourth member.

[0038] In some configurations, a method of controlling braking of a scooter includes providing a rear foot brake that can be actuated by a user, wherein the rear foot brake applies a braking force to a rear wheel of the scooter. A front brake is provided that applies a braking force to a front wheel of the scooter. The front brake is linked to the rear foot brake such that actuation of the rear foot brake actuates the front brake.

BRIEF DESCRIPTION OF THE DRAWINGS

[0039] 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 several 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.

[0040] Figure 1 is a perspective view of an embodiment of a scooter assembly.

[0041] Figure 2 is a right side elevational view of an embodiment of a scooter assembly.

[0042] Figure 3 is a perspective view of an embodiment of a scooter assembly. [0043] Figure 4 is a perspective view of an embodiment of a steering column of a scooter assembly.

[0044] Figure 5 is a perspective view of an embodiment of an electric motor and transmission system for a scooter assembly.

[0045] Figure 6 is a top plan view of an embodiment of an electric motor and transmission system for a scooter assembly.

[0046] Figure 7 is a right side elevational view of an embodiment of an electric motor and transmission system for a scooter assembly.

[0047] Figure 8 is a left side elevational view of an embodiment of an electric motor and transmission system for a scooter assembly.

[0048] Figure 9 is a perspective view of an embodiment of a casing for a transmission system for a scooter assembly.

[0049] Figure 10 is a perspective view of an embodiment of an electric motor and transmission system for a scooter assembly.

[0050] Figure 11 is a perspective view of an embodiment of a scooter assembly.

[0051] Figure 12 is another perspective view of the scooter assembly of Figure 11.

[0052] Figure 13 is a front elevational view of the scooter assembly of Figure 11.

[0053] Figure 14 is a rear elevational view of the scooter assembly of Figure 11.

[0054] Figure 15 is a right side elevational view of the scooter assembly of Figure 11.

[0055] Figure 16 is a left side elevational view of the scooter assembly of Figure 11.

[0056] Figure 17 is a top plan view of the scooter assembly of Figure 11.

[0057] Figure 18 is a bottom plan view of the scooter assembly of Figure 11.

[0058] Figure 19A is a perspective view illustrating an exploded portion of the scooter assembly of Figure 11.

[0059] Figure 19B illustrates the exploded portion of the scooter assembly of Figure 19 A.

[0060] Figure 20A illustrates a perspective view of an embodiment of an electric motor and transmission system for a scooter assembly.

[0061] Figure 20B illustrates a top plan view of the electric motor and transmission system of Figure 20A.

[0062] Figure 20C illustrates a rear elevational view of the electric motor and transmission system of Figure 20A. [0063] Figure 21 illustrates a block diagram of an embodiment of a controller for an electric motor and transmission for a scooter assembly.

[0064] Figure 22A illustrates a graph showing an example of a starting voltage applied to an electric motor of a scooter assembly without a voltage controller.

[0065] Figure 22B illustrates a graph showing an example of a starting voltage applied to an electric motor of a scooter assembly with a voltage controller.

[0066] Figure 23 is a perspective view of an embodiment of a scooter assembly.

[0067] Figure 24 is a right side view of the scooter assembly of Figure 23.

[0068] Figure 25 is a left side view of the scooter assembly of Figure 23.

[0069] Figure 26 is a rear view of the scooter assembly of Figure 23.

[0070] Figure 27 is a front view of the scooter assembly of Figure 23.

[0071] Figure 28 is a top view of the scooter assembly of Figure 23.

[0072] Figure 29 is a bottom view of the scooter assembly of Figure 23.

DETAILED DESCRIPTION

[0073] Embodiments of systems, components and methods 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, it will be understood by those of ordinary skill in the art that the inventions described herein extends beyond the specifically disclosed embodiments, examples and illustrations, and can include other uses of the inventions and obvious modifications and equivalents thereof. The terminology used in the description presented herein is not intended to be interpreted in any limited or restrictive manner simply because it is being used in conjunction with a detailed description of certain specific embodiments of the inventions. In addition, embodiments of the inventions 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.

[0074] Certain terminology may be used in the following description for the purpose of reference only, and thus are 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.

[0075] Figures 1-3 illustrate an embodiment of a scooter 100. The scooter 100 can generally comprise a deck 110, a neck portion 120, a rear wheel 130, a foot brake 140, and a steering assembly 200. The deck 110 is a component of the scooter 100 on which a rider can stand during use. For example, the deck 110 can provide a relatively flat upper surface that is configured to support the weight of at least a child. In other embodiments, the deck 110 can be configured to support the weight of an adolescent or adult. In some embodiments, the scooter 100 can include an electric motor and a transmission.

[0076] The neck portion 120 can be joined to the deck 110 at or near a front end of the deck 110. The neck portion 120 can serve to couple the deck 110 and the steering assembly 200. In some embodiments, the neck portion 120 can be integrally formed with the deck 110 such that the deck 110 and neck portion 120 are a single machined or molded component or a unitary structure formed by any suitable process. The scooter 100 can also include a housing or cowling that encloses a portion or entirety of the steering assembly 200 and, in some configurations, is positioned in front of the deck 110. The housing can have a portion that extends forward of the front wheels 240, 242.

[0077] The steering assembly 200 generally can comprise a handlebar 210, steering tube 220, rotating axle assembly 230, left front wheel 240, and right front wheel 242. The steering tube 220 can be coupled to and extend through the neck portion 120. The deck 110, neck portion 120, and steering assembly 200 can be formed from various materials, including any combination of metals, plastic, carbon fiber, and/or other materials that impart sufficient structural strength to support the weight of at least a child. At a top portion of the steering tube 220 a handlebar 210 can be attached. The handlebar 210 can comprise a left handle 212 and a right handle 214 for the rider to grip and steer the scooter 100. Turning the handlebar 210 can cause the steering tube 220 to turn the axle 230 about a steering axis of the scooter 100, thereby turning the front left and right wheels 240 and 242 to steer the scooter 100.

[0078] In addition, the handlebar 210 can comprise a user control, such as a power switch 250, as illustrated in Figure 3. A user can activate the power switch 250 to turn on or otherwise activate an electric motor. The power switch 250 may be coupled to a controller (e.g., the controller shown in FIG. 21), which may control the electric motor that drives a wheel 130, 240, 242 of the scooter 100. For example, the controller may control a voltage delivered to the electric motor from a power source, such as a battery. For example, upon a person pressing the power switch 250, the controller may be configured to ramp up the voltage in a smooth sustained manner, toward or to a maximum voltage corresponding to a maximum power output or speed, such that the acceleration of the scooter 100 is controlled, progressive or relatively smooth, or at least is not jerky. In particular, the controller may be configured to provide a controlled increase in speed toward or to a maximum speed, in a way that would be unlikely to result in a sudden jerk.

[0079] The power switch 250 may comprise a binary control, such as a spring-return on/off button. Such an arrangement is well-suited for use in an application for young children because the user can simply indicate a desire to move by pushing the button 250 and the controller can regulate an acceleration of the scooter 100 without requiring the user to regulate the acceleration, such as would be the case with the use of a variable control (e.g., a twist throttle). In alternative embodiments, the power switch 250 comprises a variable control, such as a variable throttle.

[0080] A control wire 252 can electrically couple the power switch 250 and the electric motor. In some embodiments, the control wire 252 can be partially or completely hidden from view. For example, as indicated in Figure 3, the control wire 252 can be placed within an interior portion of the steering tube 220 so that no portion of the control wire 252 is externally visible, at least when the scooter 100 is resting on a generally flat surface in a normal use condition. In other embodiments, at least a portion of the control wire 252 is located within an interior portion of the steering tube 220.

[0081] The foot brake 140 can be located in proximity to a rear portion of the deck 110. In some embodiments, the foot brake 140 can comprise plastic. In other embodiments, the foot brake 140 can comprise metals, carbon fiber, or any other suitable material. The foot brake 140 can be configured to pivot about an axis. By pivoting downward, the foot brake 140 can provide a braking pressure to the rear wheel 130. The foot brake 140 can be configured to return to its natural un-pivoted position after a user has finished applying braking pressure, such as under the influence of a biasing force from a biasing member or arrangement (e.g., a spring).

[0082] Figure 4 illustrates an embodiment of a steering assembly 200 of a scooter assembly, such as the scooter 100 of Figures 1-3. For example, a steering assembly 200 can comprise a handlebar 210, steering tube 220, rotating axle assembly 230, left front wheel 240, and right front wheel 242. The steering tube 220 can be coupled to the neck portion 120. In addition, the steering tube 220 can extend through the neck portion 120 to the rotating axle assembly 230. The rotating axle assembly 230 can be coupled to the front left and right wheels 240 and 242. At or near a top portion of the steering tube 220 a handlebar 210 can be attached. The handlebar 210 can comprise a left handle 212 and a right handle 214 for the rider to grip and steer the scooter. Turning the handlebar 210 can cause the steering tube 220 to turn the front left and right wheels 240 and 242. In preferred embodiments, power from an electric motor is not supplied to the front left and right wheels 240 and 242, as front left and right wheels 240 and 242 are primarily used for steering.

[0083] Figures 5-8 illustrate an embodiment of an electric motor and transmission system that can be positioned underneath the deck 110 or in other suitable locations of a scooter assembly 100. The electric motor and transmission system can generally comprise an electric motor 400 and a solid- gear transmission 300. For example, a solid-gear transmission 300 can comprise a first gear 310, a second gear 320, and a third gear 330, which can be spur gears in some configurations. The solid-gear transmission 300 can transfer mechanical power output from the electric motor 400 to the rear wheel of a scooter assembly. The rear wheel 130 of the scooter assembly can be positioned about a rear- wheel casing 132, which serves as a drive element for the rear wheel 130. That is, the casing 132 can be the final drive between the transmission 300 and the rear wheel 130.

[0084] In some embodiments, the electric motor can be located on a first side of or relative to the transmission. For example, as illustrated in Figure 5, if the electric motor 400 is oriented towards the front of a scooter assembly, the electric motor 400 can be located on a right side of the transmission 300. The body of the motor 400 (excluding the drive shaft to which the gear 410 is coupled) is located to the right of at least a centerline of the transmission, which can be defined as a line equidistant from outermost lateral points of the transmission 300. In some configurations, the outermost lateral points of the transmission 300 fall within opposed lateral planes containing outwardly-facing side surfaces of the gears on each side of the transmission 300. In some configurations, the body of the motor 400 is located to one side of the lateral plane on the same side of the transmission 300.

[0085] The rear wheel can be located on a second side relative to the transmission 300, different than the first side. For example, if the electric motor 400 is oriented towards the front of a scooter assembly (and on the right side of the transmission 300), the rear- wheel casing 132 can be located on a left side relative to the transmission 300. The relative positioning of the electric motor 400 and rear wheel relative to the transmission can be used to improve the weight distribution of the scooter assembly, which can result in a smoother and more stable ride. In other embodiments, the rear wheel and the electric motor can both be located on a same side relative to the transmission 300. As described, sides of the transmission 300 can be relative to a central line (e.g., right or left of center) of the transmission 300 or relative to outer planes defined by the side surfaces of the outermost gears of the transmission 300.

[0086] In some embodiments, the electric motor 400 provides mechanical power to an electric motor shaft 410. For example, when mechanical power is provided to the electric motor shaft 410, it can rotate. The electric motor shaft 410 can comprise teeth configured to engage teeth of the first gear 310. For example, when the electric motor shaft 410 rotates, rotational energy can be transferred to the first gear 310.

[0087] The first gear 310 can impart its rotational energy to a first gear shaft 312. For example, when the first gear 310 rotates, the first gear shaft 312 can rotate at the same rotational speed. The first gear shaft 312 can comprise teeth configured to engage teeth of the second gear 320. For example, when the first gear shaft 312 rotates, rotational energy can be transferred to the second gear 320.

[0088] The second gear 320 can impart its rotational energy to a second gear shaft 322. For example, when the second gear 320 rotates, the second gear shaft 322 can rotate at the same rotational speed. The second gear shaft 322 can comprise teeth configured to engage teeth of the third gear 330. For example, when the second gear shaft 322 rotates, rotational energy can be transferred to the third gear 330.

[0089] The third gear 330 can impart its rotational energy to a third gear shaft 332. For example, when the third gear 330 rotates, the third gear shaft 332 can rotate at the same rotational speed. The third gear shaft 332 can be configured to engage a rear wheel. For example, when the third gear shaft 332 rotates, rotational energy can be transferred the rear wheel.

[0090] As described above, the transmission 300 can transfer rotational mechanical energy provided by the electric motor 400 to the rear wheel of the scooter assembly. By comprising solid gears 310, 320, and 330, the transmission 300 can transfer the mechanical energy without using belts and/or chains. In some embodiments, the transmission 300 transfers the mechanical energy provided by the electric motor 400 only to the rear wheel of the scooter assembly, not directly to the front left and right wheels. [0091] Figure 9 illustrates an embodiment of a casing 340 for a transmission system for a scooter assembly. The casing 340 can include a side wall, a perimeter wall and a plurality of bosses or supports that support gears of the transmission and/or a rear wheel of the scooter. The bosses or supports can be unitarily formed with the casing 340. In some configurations, the casing 340 can be configured to house the transmission system 300 illustrated in Figures 5-8.

[0092] Figure 10 illustrates an embodiment of an electric motor and transmission system that can be positioned underneath the deck of a scooter assembly. The electric motor and transmission system can generally comprise an electric motor 400 and a solid-gear transmission 300 enclosed in a casing 340. The solid-gear transmission 300 can transfer mechanical power output from the electric motor 400 to the rear wheel 130 of a scooter assembly. In some embodiments, the rear wheel 130 and the electric motor 400 can both be located on a same side relative to the transmission 300. For example, as illustrated in Figure 10, if the electric motor 400 is oriented towards the front of a scooter assembly, the electric motor 400 can be located on a right side relative to the transmission 300. The rear wheel 130 of a scooter assembly can be positioned on the same side as the electric motor 400 relative to the transmission 300. For example, as illustrated in Figure 10, if the electric motor 400 is oriented towards the front of a scooter assembly, the rear wheel 130 also can be located on the right side relative to the transmission 300. The relative positioning of the electric motor 400 and rear wheel 130 relative to the transmission 300 can be used to improve the weight distribution of the scooter assembly, which can result in a smoother and more stable ride. Internal components or portions otherwise not shown can be similar to other components or portions described herein or of another suitable arrangement. An associated scooter can include a power source (e.g., a battery) that provides power to the electric motor 400 illustrated in Figure 10.

[0093] Figure 11-18 illustrate an embodiment of a scooter 100, which can be the same as or similar to the previous scooter 100. The scooter 100 can generally comprise a deck 110, a neck portion 120, a rear wheel 130, and a steering assembly 200. The deck 110 is a component of the scooter 100 on which a rider can stand during use. For example, the deck 110 can be configured to support the weight of at least a child. In other embodiments, the deck 110 can be configured to support the weight of an adolescent or adult. In some embodiments, the scooter 100 can include an electric motor and a transmission.

[0094] The neck portion 120 can be joined to the deck 110 at or near a front end of the deck 110. The neck portion 120 can serve to couple the deck 110 and the steering assembly 200. In some embodiments, the neck portion 120 can be integrally formed with the deck 110 such that the deck 110 and neck portion 120 are a single machined or molded component or a unitary structure formed by any suitable process.

[0095] The steering assembly 200 generally can comprise a handlebar 210, steering tube 220, rotating axle assembly 230, left front wheel 240, and right front wheel 242. The steering tube 220 can be coupled to and extend through the neck portion 120. The deck 110, neck portion 120, and steering assembly 200 can be formed from various materials, including any combination of metals, plastic, carbon fiber, and/or other materials that impart sufficient structural strength to support the weight of at least a child. At a top portion of the steering tube 220 a handlebar 210 can be attached. The handlebar 210 can comprise a left handle 212 and a right handle 214 for the rider to grip and steer the scooter. Turning the handlebar 210 can cause the steering tube 220 to turn the front left and right wheels 240 and 242.

[0096] In addition, the handlebar 210 can comprise a user control or power switch 250. A user can activate the power switch 250 to turn on an electric motor. The switch 250 can be a binary switch or control. In other arrangements, the user control can be a variable control. A control wire can electrically couple the power switch 250 with a voltage controller, which may be coupled to a battery and to the electric motor. In some embodiments, the control wire can be hidden from view, as shown in Figure 3, at least when the scooter 100 is resting on a generally flat surface in a normal use condition.

[0097] A steering assembly 200 can comprise a handlebar 210, steering tube 220, rotating axle assembly 230, left front wheel 240, and right front wheel 242. The steering tube 220 can be coupled to the neck portion 120. In addition, the steering tube 220 can extend through the neck portion 120 to the rotating axle assembly 230. The rotating axle assembly 230 can be coupled to the front left and right wheels 240 and 242. At or near a top portion of the steering tube 220, a handlebar 210 can be attached. The handlebar 210 can comprise a left handle 212 and a right handle 214 for the rider to grip and steer the scooter. Turning the handlebar 210 can cause the steering tube 220 to turn the front left and right wheels 240 and 242. In some embodiments, power from an electric motor is not supplied to the front left and right wheels 240 and 242, as front left and right wheels 240 and 242 are primarily used for steering.

[0098] Figure 19A is a perspective view illustrating an exploded portion of the scooter assembly of Figures 11-18. For example, the exploded portion generally illustrates an embodiment of an electric motor 400 and transmission system 300 that can be positioned underneath the deck 110 of a scooter assembly 100 and which transfers power to rear wheel 130.

[0099] Figure 19B illustrates the exploded portion of the electric motor and transmission system of the scooter assembly of Figure 19 A. In particular, the electric motor and transmission system can generally comprise an electric motor 400 and a solid-gear transmission 300. In some embodiments, the solid-gear transmission 300 may comprise a first gear 310, a second gear 320, and a third gear 330, as illustrated in Figures 5-8. The solid-gear transmission 300 can transfer mechanical power output from the electric motor 400 to the rear wheel 130 of the scooter assembly through the axle 410. For example, when mechanical power is provided to the axle 410, it can cause the rear wheel 130 to rotate. In some embodiments, the power output of the electric motor is controlled by a controller, as explained in more detail with respect to Figures 21 and 22A-B. In addition, a casing 340 may be used to house the transmission system 300.

[0100] With additional reference to Figure 18, for example, the illustrated scooter 100 includes the rear wheel 130 positioned along a center line or central, vertical plane of the scooter 100. The transmission casing 340 containing the transmission is positioned to one side of the rear wheel 130, such as on the right side of the scooter 100 (left side in the bottom view of Figure 18). The motor 400 is on the same side of the transmission casing 340 as the rear wheel 130. The motor 400 preferably is coupled to and supported by the transmission casing 340. The transmission casing 340 can be a separate assembly from the frame 500 and coupled to the frame 500. The center line or central plane passes through the motor 400. In the illustrated arrangement, the motor 400 is centered in a lateral direction of the scooter 100 and positioned forward of the rear wheel 130. In some configurations, the power source (e.g., battery 450) is positioned forward of the motor 400, such that the motor 400 is between the battery 450 and the rear wheel 130 in a lengthwise direction of the scooter 100.

[0101] The scooter assembly 100 may include a frame 500 that supports the deck 110. A rear portion of the frame 500 may include openings 510 and 512 to facilitate attachment of the electric motor and transmission system to the scooter assembly. For example, a nut 414 and washer 412 may be used to couple the axle 410 with transmission 300 and secured to the frame 500 through opening 512. Another nut 414 and washer 412 may be used to couple the axle 410 with the rear wheel 130 through opening 510. A spacer 416 may be provided surrounding the axle 410 to control a position of the rear wheel 130. The battery 450 can be surrounded on front, rear, left and right sides by frame members to ease mounting, provide protection or improve the appearance of the scooter. The battery 450 can be housed in a compartment or housing with other components, such as a controller (e.g., controller 600), for example.

[0102] Figure 20A illustrates a perspective view of an embodiment of an electric motor 400 and transmission system casing 340 for a scooter assembly. Figure 20B illustrates a top plan view of the electric motor 400 and transmission system casing 340 of Figure 20A. Figure 20C illustrates a rear elevational view of the electric motor 400 and transmission system casing 340 of Figure 20A. An axle (not shown) may couple the transmission system to the rear wheel 130. A spacer 416 may be provided surrounding the axle to control a position of the rear wheel 130. A nut 414 and washer 412 may be provided at each end of the axle.

[0103] In some embodiments, the electric motor 400 can be positioned approximately in line with the rear wheel 130, as shown in FIG. 20B. The transmission system and casing 430 can be provided on a right side relative to both the rear wheel 130 and the electric motor 400. By providing the electric motor 400 approximately in line with the rear wheel 130 facilitates the ability of the rear wheel 130 to support the weight of the electric motor 400, thereby providing improved weight distribution.

[0104] Figure 21 illustrates a block diagram of an embodiment of a controller 600 for an electric motor and transmission for a scooter assembly. The controller 600 may be coupled to a power switch 250 of a scooter assembly 100, a battery 610, and an electric motor 400. The battery 400 may provide electric power to the controller 600 through wires 614 and 616. In particular, in some embodiments, wire 614 may deliver positive voltage to the controller 600 (e.g., a red wire). Wire 616 may serve as a ground (e.g. , a black wire). In addition, wire 612 may serve any other function. Wires 620 and 622 may deliver electric power from the controller 600 to the electric motor 400. For example, in some embodiments, wire 620 may deliver positive voltage to the electric motor 400, whereas wire 622 may serve as a ground.

[0105] In some embodiments, the scooter assembly has a predetermined maximum speed. The predetermined maximum speed may be set based on the safety considerations of a child. When a rider presses a power switch 250, an On' signal may be provided to the controller 600, and the controller 600 may control the voltage delivered to the electric motor 400 as the scooter assembly accelerates from a rest position toward or to its predetermined maximum speed. [0106] Figure 22A illustrates a graph showing an example of a starting voltage applied to an electric motor of a scooter assembly without a voltage controller. For example, without the controller 600, as soon as a rider presses the power switch 250, the electric motor is nearly- instantaneously provided with the voltage that causes the scooter assembly to accelerate to the maximum predetermined speed. This voltage spike could result in a jerking motion applied to a rider of the associated scooter.

[0107] Figure 22B illustrates a graph showing an example of a starting voltage applied to an electric motor of a scooter assembly with a voltage controller according to an embodiment. For example, with the controller 600, when a rider presses the power switch 250, the controller 600 smoothly ramps up the voltage provided to the electric motor 400. For example, in some embodiments, as shown in Figure 22B, the voltage controller ramps the voltage provided to the electric motor 400 from zero up to its maximum predetermined speed smoothly over an interval of approximately two seconds or at least two seconds. In contrast, the arrangement of Figure 22A reaches maximum voltage in about 1/25 or less of the amount of time it takes the arrangement of Figure 22B to reach maximum voltage. In other configurations, the scooter with the illustrated control arrangement can accelerate from zero to its maximum speed over an interval of at least one second or an interval of between about 1-3 seconds or about 1-2 seconds, for example and without limitation.

[0108] In some embodiments, the controller 600 provides a safe-start method of control. In particular, after a rider presses the power switch 250, the power transferred from the battery 610 to the electric motor 400 may be initially limited by the controller 600 to a predetermined fraction of the full power for a pre-specified amount of time, after which the controller 600 allows the power transferred from the battery 610 to the electric motor 400 to ramp up to the maximum power. For example, this safe-start method allows young riders to become aware of the forward motion of the scooter assembly before experiencing the full forward motion of the scooter, and without having to experience 100% of the forward motion as a sudden, single acceleration event. In some configurations, the power transferred immediately ramps up from the initiation of the power switch 250 or other user control.

[0109] Figures 23-29 illustrate an embodiment of a scooter 100. The scooter 100 can generally comprise a deck 110, a neck portion 120, a rear wheel 130, a foot brake 140, and a steering assembly 200. The deck 110 is a component of the scooter 100 on which a rider can stand during use. For example, the deck 110 can be configured to support the weight of at least a child. In other embodiments, the deck can be configured to support the weight of an adolescent or adult. In some embodiments, the scooter 100 can include an electric motor and a transmission.

[0110] The neck portion 120 can be joined to the deck 110 at or near a front end of the deck 110. The neck portion 120 can serve to couple the deck 110 and the steering assembly 200. In some embodiments, the neck portion 120 can be integrally formed with the deck 110.

[0111] The steering assembly 200 generally can comprise a handlebar 210, steering tube 220, head tube 230, and a front wheel 240. The steering tube 220 can be supported for rotation relative to and extend through the head tube 230. The deck 110, neck portion 120, and steering assembly 200 can be formed from various materials, including any combination of metals, plastic, carbon fiber, and/or other materials that impart sufficient structural strength to support the weight of a child, adolescent, or adult. At or near a top portion of the steering tube 220, a handlebar 210 can be attached. The handlebar 210 can comprise a left handle 212 and a right handle 214 for the rider to grip and steer the scooter 100. Turning the handlebar 210 can cause the steering tube 220 to turn the front wheel 240.

[0112] In some embodiments, the steering assembly 200 also can comprise a display 160, which can be or include a speedometer, mounted to an upper portion of the steering assembly 200. For example, the speedometer 160 can be configured to display a speed of the scooter 100 to a user. The speedometer 160 can include a digital or analog output. In other embodiments, the speedometer 160 can be configured to display additional information to a user. For example, the speedometer 160 could be configured to also display a status of battery charge level to a user. The speedometer 160 can be mounted to an upper portion of the steering assembly 200 with an upward-facing angle so that the speedometer 160 would be approximately facing a user looking down from a normal standing orientation on the scooter 100 for ease of viewing. The speedometer 160 could also be attached to the left handle 212 or the right handle 214.

[0113] In addition, the handlebar 210 can comprise a power switch, accelerator or other user control (not shown). In some embodiments, a user can turn on or actuate an electric motor by rotating grips of the left handle 212 and/or right handle 214, such as a rotating grip throttle arrangement. In addition, a user can exercise variable control of a speed output of the electric motor using rotation of the left handle 212 and/or right handle 214. As shown in Figure 23, a throttle cable 252 can electrically couple electrical components in the handlebar 210 (e.g., the throttle grip) and the electric motor. In some embodiments, a portion or an entirety of the throttle cable 252 can be hidden from view. For example, as indicated in Figure 23, the throttle cable 252 can be placed within an interior portion of the steering tube 220 so that the throttle cable 252 generally is not externally visible along a substantial entirety of the length of the steering tube 220. In some arrangements, a substantial entirety of the length is seventy-five percent or more of the length. In some embodiments, at least a portion of the throttle cable 252 is located within an interior portion of the steering tube 220. At a lower portion of the steering tube 220, the throttle cable 252 can visibly exit the steering tube 220 and enter the neck portion 120. Alternatively, at a lower portion of the steering tube 220, the throttle cable 252 can transition from the steering tube 220 to the neck portion 120 without being externally visible, such as by passing through an opening in the head tube 230, for example.

[0114] The foot brake 140 can be located at or in proximity to a rear portion of the deck 110. In some embodiments, the foot brake 140 can comprise plastic. In other embodiments, the foot brake 140 can comprise metals, carbon fiber, or any other suitable material. The foot brake 140 can be configured to pivot about an axis extending in a lateral direction of the scooter 100. By pivoting downward, the foot brake 140 can provide a direct or indirect braking pressure to the rear wheel 130. The foot brake 140 can be configured to return to its natural un-pi voted position after a user has finished applying braking pressure, such as by a biasing force provided by a biasing arrangement (e.g., a spring). In the illustrated arrangement, the foot brake 140 is a continuous extension of the deck 110. That is, the shape of the deck 110 extends continuously and naturally into the foot brake 140. The upper surface of the deck 110 can have a tapered shape that tapers or reduces in width at a particular rate from forward to rearward ends or front to back. The foot brake 140 can continue from the deck 110 at the same rate of tapering from forward to rearward ends or front to back. Similarly, the foot brake 140 can have side surfaces that continue the shape of the side surfaces of the deck 110, such as the shape of the side surfaces immediately forward of the foot brake 140.

[0115] In some embodiments, the foot brake 140 can be configured to engage braking of at least one or both of the rear wheel 130 and front wheel 240. For example, the foot brake 140 can be configured to engage braking of only the rear wheel 130. Alternatively, the foot brake 140 can be configured to engage braking of only the front wheel 240. In other embodiments, the foot brake 140 can be configured to engage simultaneous braking of both the rear wheel 130 and the front wheel 240. For example, the front wheel 240 can include a disc brake, as illustrated, and a linkage can be provided to transfer rotational motion of the foot brake 140 into a suitable motion to actuate the front brake. The front brake can be a mechanical disc brake similar to those used in bicycle applications and sold by Avid or Shimano, for example. Such brakes typically have an actuating arm that can be cable actuated. Thus, the linkage between the foot brake 140 and the front brake can comprise a control cable, such as those typically used in bicycle and motorcycle applications, which often includes a movable inner wire within an outer housing or sheath.

[0116] A frame 150 can be configured to provide structural support to at least the deck 110. In addition, the frame 150 can provide a structural foundation for coupling the components of the scooter 100 together, from the neck portion 120 to the rear wheel 130. The frame can have a first half on one lateral side of the scooter 100 and a second half on the other lateral side of the scooter. The first and second halves can be symmetrical and can be coupled at forward and rearward ends by other frame members, such as the head tube 230 and a rear cross member 232 (Figure 29).

[0117] In an embodiment, the frame 150 can include multi-planar elements or portions. For example, the frame 150 can include a plurality of frame members that comprise a visible exoskeleton. The frame 150 can comprise a plurality of substantially planar frame members, including first substantially planar frame members 151, second substantially planar frame members 152, third substantially planar frame members 153, and fourth substantially planar frame members 154. The frame 150 can comprise a plurality of substantially vertical frame members, including first substantially vertical frame members 155, second substantially vertical frame members 156, third substantially vertical frame members 157, fourth substantially vertical frame members 158, and fifth substantially vertical frame members 159. For example, planar frame members as described herein are in contrast to tubular frame members often used in scooter frame construction. Thus, the substantially planar frame members are not necessary completely planar, but simply do not define a completely closed loop as does a tubular frame member. However, in some configurations, the scooter frame can include or be constructed entirely from tubular members.

[0118] In some embodiments, the frame 150 is substantially symmetric between a left and right half of the frame 150. So, for example, for one substantially planar frame member 151 on the left half of the frame 150, there is a substantially planar frame member 151 on the right half of the frame 150. Similarly for each of the substantially planar frame members 152, 153, and 154 and substantially vertical frame members 155, 156, 157, 158, and 159 on the left half of the frame 150, there are substantially planar frame members 152, 153, and 154 and substantially vertical frame members 155, 156, 157, 158, and 159, respectively, on the right half of the frame 150. [0119] The frame 150 can comprise a frame portion or element having multi-planar folding to provide additional strength to the structure of the frame 150. That is, in a multi-planar folded arrangement, a single frame member is bent to define portions lying in at least two different planes. Other multi-planar arrangements may not be folded arrangements. In some embodiments, the substantially planar and vertical frame members can combine to form structures that generally can reside in different planes. For example, first substantially planar frame member 151, second substantially vertical frame member 156, fourth substantially planar frame 154, and third substantially vertical frame member 157 can combine to form a first closed loop, which can be a generally rectangular, square or approximately trapezoidal shape that resides in a first plane. In addition, second substantially planar frame member 152, third substantially vertical frame member 157, third substantially planar frame 153, and fourth substantially vertical frame member 158 can combine to form a second closed loop, which can be a generally rectangular, square or approximately trapezoidal shape that resides in a second plane. The first plane of the first approximately trapezoidal shape can be located at an offset angle relative to the second plane of the second approximately trapezoidal shape.

[0120] In addition, the plane of the approximately trapezoidal shape formed by the first substantially planar frame member 151, second substantially vertical frame member 156, fourth substantially planar frame 154, and third substantially vertical frame member 157 on the left half of the frame 150 can form a different plane (e.g., a plane that is non-parallel) than the plane of the approximately trapezoidal shape formed by the first substantially planar frame member 151, second substantially vertical frame member 156, fourth substantially planar frame 154, and third substantially vertical frame member 157 on the right half of the frame 150. Similarly, the plane of the approximately trapezoidal shape formed by the second substantially planar frame member 152, third substantially vertical frame member 157, third substantially planar frame 153, and fourth substantially vertical frame member 158 on the left half of the frame 150 can form a different plane (e.g., a plane that is non-parallel) than the plane of the approximately trapezoidal shape formed by the second substantially planar frame member 152, third substantially vertical frame member 157, third substantially planar frame 153, and fourth substantially vertical frame member 158 on the right half of the frame 150. As illustrated, the frame 150 comprises portions defining at least four different planes. In some configurations, the four different planes are arranged in a generally vertical orientation. The planes can be arranged in two forward planes and two rearward planes, with the forward planes being aligned in a length direction (i.e., beginning and ending at approximately the same locations in a length direction) of the scooter 100. Similarly, the rearward planes can be aligned in a length direction. The two forward planes can increase in width in a forward to rearward direction and/or the two rearward planes can decrease in width in a forward to rearward direction. Thus, from a top or bottom view, at least a portion of the frame defined by the multi-planar portions can be in the general shape of a diamond or rhombus. In some configurations, a forward end of the deck 110 can be positioned forward of an intersection or junction between the frame portion defining the forward planes and the frame portion defining the rearward planes.

[0121] The multi-planar elements can increase the structural integrity of the frame 150. In some embodiments, the frame 150 can comprise any combination of metals (e.g., aluminum or steel), plastic, carbon fiber, and/or other materials that impart sufficient structural strength to support the weight of a child, adolescent, or adult. However, the increased structural integrity provided by the multi-planar folding can facilitate the usage of materials with less structural strength, such as plastic. In addition, the multi-planar folding of the frame 150 can provide a visible exoskeleton. In some configurations, the frame 150 can include frame elements that define open spaces therebetween such that internal portions or components of the scooter 100 are visible through the external frame. In other words, the frame can surround internal portions or components, but can include openings that expose such internal portions or components. Furthermore, the increased structural strength provided by the multi-planar elements can decrease the weight of the scooter 100, as lighter materials may be used, resulting in increased energy efficiency.

[0122] In some embodiments, the scooter 100 can comprise a multi-piece frame construction. The frame 150 can be mechanically assembled from parts as part of a scooter 100 that does not include a suspension. For example, frame 150 can be assembled from parts, including substantially planar frame members 151, 152, 153, and 154 and substantially vertical frame members 155, 156, 157, 158, and 159. In addition, the frame 150 can be mechanically assembled to include additional parts. In other embodiments, certain metal parts of the frame 150 can be welded together.

[0123] An electric motor can be configured to provide power output to the rear wheel 130 directly or through a suitable drivetrain arrangement, which can include a suitable transmission and final drive. For example, in some embodiments, a belt or chain can transfer mechanical power from the electric motor (via the transmission) to the rear wheel 130. As shown in Figure 24, a rearwardly- extending wheel mount portion of the frame can include a chain guard 170 that provides protection against unintended contact with the belt or chain. In preferred embodiments, the chain guard 170 is transparent so that movement of the belt or chain is visible. In other embodiments, the chain guard 170 also can be opaque.

[0124] To protect the undersides of the scooter 100 and components, such as the electric motor (not shown), a bash guard 180 can be provided, as shown in Figure 29. In some embodiments, the bash guard 180 is provided at a location between the rear wheel 130 and the front wheel 240. In preferred embodiments, the bash guard 180 can comprise a metal. In other embodiments, the bash guard 180 can comprise a hard plastic. The bash guard 180 can comprise a curved molded shape or a substantially flat shape. In some embodiments, the bash guard 180 can comprise a plurality of openings. The openings advantageously serve many functions. For example, the openings can allow for weight reduction of the bash guard. Also, the openings can allow airflow to a battery box, and provide a draining mechanism so that the scooter assembly does not retain water in wet conditions.

[0125] The neck 120 can include an upper plate member 122 and/or a lower plate member 124. The plate members 122, 124 preferably each extend across in a lateral direction from one half of the frame 150 to the other half of the frame 150 (e.g., between members 153 on each side and/or between members 152 on each side). The plate members 122, 124 can be coupled to each side of the frame 150, such as by fasteners or welding. By being coupled to and extending between each side of the frame 150, the plates 122, 124 add rigidity and resist torsional deflection of the frame 150. The plate member 122 can also function as a portion of the deck 110 or in a manner similar to the deck 110. The plate member 124 can also function as a portion of the bash guard 180 or in a manner similar to the bash guard 180. Thus, the plates 122, 124 can protect internal components or portions of the scooter 100. The plates 122, 124 can comprise a plurality of through holes, which can reduce the weight of the plates 122, 124.

Conclusion

[0126] It should be emphasized that many variations and modifications may be made to the herein-described embodiments, the elements of which are to be understood as being among other acceptable examples. All such modifications and variations are intended to be included herein within the scope of this disclosure and protected by the following claims. Moreover, any of the steps described herein can be performed simultaneously or in an order different from the steps as ordered herein. Moreover, as should be apparent, the features and attributes of the specific embodiments disclosed herein may be combined in different ways to form additional embodiments, all of which fall within the scope of the present disclosure. [0127] 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.

[0128] Moreover, the following terminology may have been used herein. 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. The term "substantially" means that the recited characteristic, parameter, or value need not be achieved exactly, but that deviations or variations, including for example, tolerances, measurement error, measurement accuracy limitations and other factors known to those of skill in the art, may occur in amounts that do not preclude the effect the characteristic was intended to provide.

[0129] 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.

Claims

WHAT IS CLAIMED IS:

1. A scooter comprising:

at least two front wheels;

a rear wheel;

a steering assembly comprising a handlebar and a steering tube coupled to the at least two front wheels;

a deck configured to support the weight of a child;

an electric motor configured to provide power; and

a transmission configured to transfer power provided by the electric motor to the rear wheel.

2. The scooter of Claim 1 , wherein the rear wheel and electric motor are both located on a same side of the transmission.

3. The scooter of Claim 2, wherein the electric motor is located approximately in line with the rear wheel in a lateral direction of the scooter.

4. The scooter of Claim 3, further comprising a battery, wherein the electric motor is positioned between the battery and the rear wheel in a lengthwise direction of the scooter.

5. The scooter of Claim 4, wherein the battery is surrounded by frame members on front, rear, right and left sides of the battery.

6. The scooter of Claim 1 , further comprising a transmission casing that at least partially encloses one or more transmission gears, wherein the electric motor is coupled to and supported by the casing.

7. The scooter of Claim 6, wherein the transmission comprises a drive element for driving the rear wheel, wherein the electric motor is at a first end of the transmission casing and the drive element is at a second end of the transmission casing in a lengthwise direction of the scooter.

8. The scooter of Claim 1 , further comprising:

a power switch coupled to the handlebar; and

a control wire coupled to the power switch, wherein the control wire is at least partially within an interior of the steering tube.

9. The scooter of Claim 1 , further comprising:

a battery;

a power switch; and a controller coupled to the power switch, the battery, and the electric motor, wherein, in response to receiving an on- signal from the power switch, the controller is configured to ramp up the voltage provided to the electric motor over an interval of time.

10. The scooter of Claim 9, wherein the interval of time is at least one second.

11. The scooter of Claim 9, wherein the interval of time is about two seconds.

12. The scooter of Claim 9, wherein the power switch is a binary switch.

13. The scooter of Claim 9, wherein the controller is configured to, upon actuation of the power switch, initially limit the voltage provided by the electric motor to the motor to a predetermined fraction of the full power for a pre-specified amount of time.

14. A method of controlling an electric scooter, comprising:

receiving an on-signal from a user control;

ramping up a voltage applied to an electric motor over an interval of time in response to the on-signal;

using power from the electric motor to drive a wheel of the scooter.

15. The method of Claim 14, wherein the interval of time is at least one second.

16. The method of Claim 14, wherein the interval of time is about two seconds.

17. The method of Claim 14, wherein the on-signal is a binary signal.

18. A scooter comprising:

a front wheel;

a rear wheel;

a steering assembly comprising a steering tube and a handlebar;

a rear foot brake, the rear foot brake configured to apply a braking force to at least one of the front wheel and the rear wheel;

a deck configured to support the weight of a person; and

a frame configured to support the deck, the frame comprising a plurality of frame members arranged to form at least two or more vertical planes on one lateral side of the scooter.

19. The scooter of claim 18, wherein the scooter further comprises:

an electric motor;

a battery; and a throttle cable coupled to the handlebar and the electric motor, wherein the throttle cable is at least partially hidden within an interior of the steering tube.

20. The scooter of claim 18, wherein the scooter further comprises a transparent chain guard.

21. The scooter of claim 18, wherein the scooter further comprises a speedometer.

22. The scooter of claim 18, wherein the rear foot brake is configured to actuate a front brake of the front wheel and apply the braking force to the rear wheel simultaneously.

23. The scooter of claim 18, wherein the frame comprises a front portion and a rear portion, wherein the front portion defines a pair of vertical planes that diverge in a forward to rearward direction.

24. The scooter of claim 23, wherein the rear portion defines a pair of vertical planes that converge in a forward to rearward direction.

25. The scooter of claim 24, wherein a forward end of the deck is positioned forward of a junction between the front portion and the rear portion of the frame.

26. The scooter of claim 24, further comprising at least one plate extending in a lateral direction from one side of the frame to the other side of the frame, the at least one plate being coupled to each side of the frame.

27. The scooter of claim 26, wherein the at least one plate comprises an upper plate on an upper side of the frame and a lower plate on a lower side of the frame.

28. The scooter of claim 18, further comprising at least one plate extending in a lateral direction from one side of the frame to the other side of the frame, the at least one plate being coupled to each side of the frame.

29. The scooter of claim 28, wherein the at least one plate comprises an upper plate on an upper side of the frame and a lower plate on a lower side of the frame.

30. The scooter of claim 18, wherein each portion of the frame that defines a plane comprises a first member, a second member, a third member and a fourth member.

31. A method of controlling braking of a scooter, comprising:

providing a rear foot brake that can be actuated by a user, wherein the rear foot brake applies a braking force to a rear wheel of the scooter;

providing a front brake that applies a braking force to a front wheel of the scooter; linking the front brake to the rear foot brake such that actuation of the rear foot brake actuates the front brake.