Patent Publication Number: US-2021179226-A1

Title: Bicycle suspension components and electronic control devices

Description:
FIELD OF THE DISCLOSURE 
     This disclosure relates generally to bicycle components and, more specifically, to bicycle suspension components and electronic control devices. 
     BACKGROUND 
     Bicycles are known to have suspension components. Suspension components are used for various applications, such as cushioning impacts, vibrations, or other disturbances experienced by the bicycle during use. A common application for suspension components on bicycles is for cushioning impacts or vibrations experienced by the rider when the vehicle is ridden over bumps, ruts, rocks, pot holes, and/or other obstacles. These suspension components include rear and/or front wheel suspension components. Suspension components may also be used in other locations, such as a seat post or handlebar, to insulate the rider from impacts. 
     SUMMARY 
     An example shock absorber for a bicycle disclosed herein includes a damper body defining a first chamber and a reservoir defining a second chamber. A flow path is defined between the first chamber and the second chamber. The example shock absorber also includes a flow control member disposed in the flow path and a motor to operate the flow control member to affect fluid flow between the first chamber and the second chamber. 
     An example shock absorber for a bicycle disclosed herein includes a damper body defining a first chamber and a reservoir defining a second chamber. A flow path is defined between the first chamber and the second chamber. The example shock absorber also includes flow control member disposed in a body of the reservoir and a control device to, based on a wireless command signal, operate the flow control member to affect a flow of fluid between the first chamber and the second chamber. 
     An example shock absorber for a bicycle disclosed herein includes a spring and a damper configured in a telescoping arrangement with the spring. The damper has a damper body defining a first chamber. A flow path is defined between the first chamber and a second chamber. The example shock absorber also includes a flow control member disposed in the flow path and a motor to operate the flow control member to affect a damping rate of the shock absorber. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a side view of an example bicycle that may employ example suspension components and example electronic control devices disclosed herein. 
         FIG. 2  is a perspective view of an example shock absorber with an example control device constructed in accordance with the teachings of this disclosure and which may be implemented on the example bicycle of  FIG. 1 . 
         FIG. 3  is a side view of the example shock absorber of  FIG. 2 . 
         FIG. 4  is a perspective view of the example shock absorber of  FIG. 2  showing the example control device as separated from an example reservoir of the example shock absorber. 
         FIG. 5  is a perspective view of the example control device of  FIG. 2 . 
         FIG. 6  is a partially exploded view of the example shock absorber of  FIG. 2  without the example control device. 
         FIG. 7  is a side view of the example reservoir and an example cap of the example shock absorber of  FIG. 2 . 
         FIG. 8  is a cross-sectional view of the example reservoir and the example cap taken along line A-A of  FIG. 7 .  FIG. 8  shows an example flow control member in the example reservoir. 
         FIG. 9  is an exploded of the example flow control member of  FIG. 8 . 
         FIG. 10  is a perspective view of the example flow control member of  FIG. 8 . 
         FIG. 11  is a side view of the example flow control member of  FIG. 8 . 
         FIG. 12  is a cross-sectional view of the example flow control member taken along line B-B of  FIG. 11  showing the example flow control member in an open state. 
         FIG. 13  is a cross-sectional view of the example flow control member taken along line B-B of  FIG. 11  showing the example flow control member in a partially closed state. 
         FIG. 14  is a cross-sectional view of the example flow control member taken along line B-B of  FIG. 11  showing the example flow control member in a closed state. 
         FIG. 15  is an exploded view of the example control device of  FIG. 2 . 
         FIG. 16  is an exploded view of an example motor assembly of the example control device of  FIG. 15 . 
         FIG. 17  is a perspective view of the example motor assembly of  FIG. 16 . 
         FIG. 18  is a cross-sectional view of the example motor assembly taken along line C-C of  FIG. 17 . 
         FIG. 19  is a cross-sectional view of the example control device taken along line D-D of  FIG. 4 . 
     
    
    
     The figures are not to scale. Instead, the thickness of the layers or regions may be enlarged in the drawings. In general, the same reference numbers will be used throughout the drawing(s) and accompanying written description to refer to the same or like parts. 
     Descriptors “first,” “second,” “third,” etc. are used herein when identifying multiple elements or components that may be referred to separately. Unless otherwise specified or understood based on their context of use, such descriptors are not intended to impute any meaning of priority or ordering in time but merely as labels for referring to multiple elements or components separately for ease of understanding the disclosed examples. In some examples, the descriptor “first” may be used to refer to an element in the detailed description, while the same element may be referred to in a claim with a different descriptor such as “second” or “third.” In such instances, it should be understood that such descriptors are used merely for ease of referencing multiple elements or components. 
     DETAILED DESCRIPTION 
     Disclosed herein are example dampers that may be implemented as a suspension component of a vehicle, such as a bicycle. The example dampers may be utilized as part of a shock absorber, which incorporates a damper and a spring that act in conjunction to absorb shock impulses. The example dampers are adjustable and can operate in different states to affect the damping rate of the shock absorber. The degree of desired damping may depend on a variety of variables, such as the speed of the bicycle, the terrain over which the bicycle is being ridden, the structure of the bicycle, the wheel width, the weight of the rider, and/or the particular preferences of the rider. 
     Traditional adjustable dampers are manually operated by a user. Some known adjustable dampers have adjustment knobs on the damper itself. However, adjusting this type of damper is often a time consuming task. In particular, a rider cannot safely adjust the damper while riding the bicycle. Therefore, the rider is required to dismount the bicycle to manually adjust the damper. Other known adjustable dampers are actuated via cable or hydraulic tubing running to an actuation mechanism on the handlebars. However, these cables and tubes are often bulky and add weight to the bicycle. Further, these cables and tubes are prone to being damaged by external hazards (e.g., tree limbs). 
     Disclosed herein are example adjustable dampers that can be remotely actuated and/or modified. In particular, disclosed herein are example electronic control devices that may be used to actuate and/or modify the states of a damper. The example electronic control devices may include a motion device, such as a motor, a battery, and a wireless receiver to receive wireless command signals. 
     In an embodiment, a motor is used as a motion device to provide rotational movement for the system. In some applications the rotational movement may be preferred, and an electric motor providing said rotational movement may be an efficient use of energy contained in a power supply, such as a battery. 
     Based on a received command signal, a motor may be activated to change a state of a flow control member of the damper, thereby affecting a damping rate of the damper. Thus, the example electronic control devices disclosed herein do not require bulky cables or tubes as seen in known adjustable damping systems. Further, the example electronic control devices may be used to automatically adjust or modify the state of the damper without physical user interaction with the suspension component. This enables near instantaneous adjustment of the damper without having to manually interact with the damper. Thus, the damper can be quickly adjusted to an optimal or desired state while the rider is riding the bicycle (i.e., on the fly). In some examples, the command is generated by a controller based on one or more other parameter(s) of the bicycle and/or based on user input to the controller. The example electronic control devices disclosed herein are relatively small and compact and, thus, add minimal weight to the suspension component. Further, the components of the electronic control device are contained in a housing that protects the components from external hazards, such as tree limbs, rocks, etc. with which the suspension component may be exposed during aggressive riding. 
     Turning now to the figures,  FIG. 1  illustrates one example of a human powered vehicle on which the example suspension components and electronic control devices disclosed herein may be implemented. In this example, the vehicle is one possible type of bicycle  100 , such as a mountain bicycle. In the illustrated example, the bicycle  100  includes a frame  102  and a front wheel  104  and a rear wheel  106  rotatably coupled to the frame  102 . In the illustrated example, the front wheel  104  is coupled to the front end of the frame  102  via a front fork  108 . A front and/or forward riding direction or orientation of the bicycle  100  is indicated by the direction of the arrow A in  FIG. 1 . As such, a forward direction of movement for the bicycle  100  is indicated by the direction of arrow A. 
     In the illustrated example of  FIG. 1 , the bicycle  100  includes a seat  110  coupled to the frame  102  (e.g., near the rear end of the frame  102  relative to the forward direction A) via a seat post  112 . The bicycle  100  also includes handlebars  114  coupled to the frame  102  and the front fork  108  (e.g., near a forward end of the frame  102  relative to the forward direction A) for steering the bicycle  100 . The bicycle  100  is shown on a riding surface  116 . The riding surface  116  may be any riding surface such as the ground (e.g., a dirt path, a sidewalk, a street, etc.), a man-made structure above the ground (e.g., a wooden ramp), and/or any other surface. 
     In the illustrated example, the bicycle  100  has a drivetrain  118  that includes a crank assembly  120 . The crank assembly  120  is operatively coupled via a chain  122  to a sprocket assembly  124  mounted to a hub  126  of the rear wheel  106 . The crank assembly  120  includes at least one, and typically two, crank arms  128  and pedals  130 , along with at least one front sprocket, or chainring  132 . A rear gear change device  134 , such as a derailleur, is disposed at the rear wheel  106  to move the chain  122  through different sprockets of the sprocket assembly  124 . Additionally or alternatively, the bicycle  100  may include a front gear change device to move the chain  122  through gears on the chainring  132 . 
     The example bicycle  100  includes a suspension system having one or more suspension components. In this example, the bicycle  100  include a front suspension component  136  and a rear suspension component  138 . The front and rear suspension components  136 ,  138  are shock absorbers (sometimes referred to as shocks) and referred to herein as the shock absorbers  136 ,  138 . The shock absorbers  136 ,  138  absorb shocks while riding the bicycle  100  (e.g., when riding over rougher terrain). In this example, the shock absorber  136  is integrated into the front fork  108 . The shock absorber  138  is coupled between two portions of the frame  102 , including a swing arm  140  coupled to the rear wheel  106 . In other examples, the shock absorber  136  and/or the shock absorber  138  may be integrated into the bicycle  100  in other configurations or arrangements. Further, in other examples, the suspension system may employ only one suspension component (e.g., only one shock absorber, such as the shock absorber  138 ) or more than two suspension components (e.g., an additional suspension component on the seat post  112 ) in addition to or as an alternative to the shock absorbers  136 ,  138 . 
     In some examples, one or more components of the bicycle  100  are electronically controlled. For example, the shock absorber  138  of  FIG. 1  includes an electronic control device  142  (referred to herein as the control device  142 ) that can adjust certain parameters of the shock absorber  138 . Examples of the shock absorber  138  and the control device  142  are disclosed in further detail herein. Similarly, in the illustrated example, the bicycle  100  includes a control device  144  associated with the shock absorber  136  that can adjust certain parameters of the shock absorber  136 . An example of such a control device and front suspension component are disclosed in U.S. application Ser. No. 16/140,064, titled “Controllable Cycle Suspension,” filed Sep. 24, 2018, which is hereby incorporated by reference in its entirety. Further, in the illustrated example of  FIG. 1 , the bicycle  100  includes a control device  146  associated with the rear gear change device  134  for switching gears, a control device  148  associated with the seat post  112  for adjusting the suspension and/or height of the seat  110 , and a control device  150  associated with one or both brake levers  152  for braking the bicycle  100 . In other examples, the bicycle  100  may include more or fewer control devices. 
     In some examples, the bicycle  100  includes a controller  154  (e.g., a master controller device) that can communicate with and control one or more components of the bicycle  100 . For example, the controller  154  may wirelessly transmit commands to the control devices  142 ,  144 ,  146 ,  148 ,  150  to adjust certain parameters of the respective components. In some examples, the controller  154  has a user interface (e.g., buttons, a touch screen, etc.) to receive input commands from a user. For example, a user may input a command to increase or decrease the damping rate of the shock absorber  138 . In such an example, the controller  154  transmits a command to the control device  142  associated with the shock absorber  138 . Additionally or alternatively, the controller  154  may automatically generate commands based on one or more sensed parameters (e.g., a speed of the bicycle  100 , a pitch angle of the bicycle  100 , a crank assembly torque, etc.). Thus, the bicycle  100  may have one or more sensors to measure and/or detect various parameters associated with the bicycle  100 . The controller  154  and the control devices  142 ,  144 ,  146 ,  148 ,  150  communicate and/or otherwise share data such as control commands, status indicators, and other data related to the function and/or activity of the bicycle  100 . 
     In this example, the controller  154  and the control devices  142 ,  144 ,  146 ,  148 ,  150  communicate (e.g., send/receive commands, sensor output values, etc.) via wireless communication. In other examples, the bicycle  100  may include one or more wired connections (e.g., wires, cables, etc.) to communicatively couple the controller  154  and the control devices  142 ,  144 ,  146 ,  148 ,  150 . 
     While the example bicycle  100  depicted in  FIG. 1  is a type of mountain bicycle, the example suspension components and example electronic control devices disclosed herein can be implemented on other types of bicycles. For example, the disclosed suspension components and electronic control devices may be used on road bicycles, as well as bicycles with mechanical (e.g., cable, hydraulic, pneumatic, etc.) and non-mechanical (e.g., wired, wireless) drive systems. The disclosed suspension components and control devices may also be implemented on other types of two-, three-, and four-wheeled human powered vehicles. Further, the example suspension components and control devices can be used on other types of vehicles, such as motorized vehicles (e.g., a motorcycle, a car, a truck, etc.). 
       FIG. 2  is a perspective view of the example shock absorber  138 , which is used as the rear suspension component on the bicycle  100 . However, the shock absorber  138  may be used on other locations on the bicycle  100 . The example shock absorber  138  includes the control device  142  to adjust or modify one or more operational states of the shock absorber  138 , as disclosed in further detail herein. 
     In the illustrated example, the example shock absorber  138  includes an integrated spring  200  and damper  202 . The spring  200  operates (by compressing or expanding) to absorb vibrations or shocks, while the damper  202  operates to dampen (slow) the movement of the spring  200 . In the illustrated example, the spring  200  is implemented as an air can  204 . However, in other examples, the spring  200  may be implemented as another type of spring, such as a coil spring. The spring  200  and the damper  202  are configured in a telescoping arrangement and aligned along an axis  206 . 
     In the illustrated example, the shock absorber  138  includes a cap  208 , which forms a top of the air can  204 . The damper  202  includes a damper body  210 . The cap  208  and the damper body  210  include respective first and second attachment portions  212 ,  214  (e.g., eyelets) at distal ends for connecting the shock absorber  138  between two components of a bicycle, such as two points on the frame  102  ( FIG. 1 ) of the bicycle  100  ( FIG. 1 ), the frame  102  and the swing arm  140  ( FIG. 1 ) connected to the rear wheel  106  ( FIG. 1 ) of the bicycle  100 , and/or another intermediate part or component. In the illustrated example, the first and second attachment portions  212 ,  214  are aligned along the axis  206  of the spring  200  and the damper  202 . The air can  204  and the damper body  210  are configured in a telescopic arrangement. As such, the damper body  210  is moveable into and out of the air can  204  as shown by the double-sided arrow. For example, during compression, the first and second attachment portions  212 ,  214  are pushed toward each other, which moves the damper body  210  into the air can  204  (or moves the air can  204  over the damper body  210 ). Conversely, during rebound, the first and second attachment portions  212 ,  214  are pushed (or and/or pulled) apart at least in part by force from the spring  200 , which moves the damper body  210  out of the air can  204 . In an embodiment, the first attachment portion  212  and/or the second attachment portion  214  includes a rounded or circular vacancy or hole. The rounded or circular vacancy or hole may be configured for rotational attachment to a frame, or frame part, of a bicycle. The first attachment portion  212  may be fixably attached to the cap  208 . The second attachment portion  214  may be fixably attached to a tube or other part of the damper body  210 . 
     In general, compression of the shock absorber  138  is followed by rebound. The example damper  202  of  FIG. 2  includes the ability to independently adjust the compression and rebound rates. This type of control enables the shock absorber  138  to be configured for specific types of riding and for specific rider styles and preferences. 
     In the illustrated example, the shock absorber  138  includes a reservoir  216  (sometimes referred to as a shock can or shock piggy-back can). The reservoir  216  is disposed outside of the spring  200  and the damper  202 . The reservoir  216  is used to house excess damper fluid as the shock absorber  138  compresses and/or rebounds. In particular, during compression and rebound, damper fluid is routed between the damper body  210  and the reservoir  216 . The flow of damper fluid between the damper body  210  and the reservoir  216  can be controlled to affect the damping rate of the shock absorber  138 , as disclosed in further detail herein. This type of shock absorber having an external reservoir has many advantages. For example, using the reservoir  216  keeps nitrogen (or other pneumatic fluid) away from the main body (e.g., the spring  200  and the damper  202 ) of the shock absorber  138 , which reduces overall heat buildup. Also, splitting the load of a shock between two compression circuits can make the shock feel less harsh. Further, reservoirs are often larger and can be used to house larger internal floating pistons. This results in more linear stroke, and the amount of shock that ramps up towards the ends of its stroke may be less. 
     In this example, the reservoir  216  is coupled to the cap  208 . The reservoir  216  extends downward along a side of the air can  204 . The reservoir  216  is aligned along an axis  218  that is parallel to and offset to the axis  206  of the spring  200  and the damper  202 . In other examples, the reservoir  216  can be coupled to another part of the spring  200  and/or the damper  202 , such as the side of the air can  204 . 
     In the illustrated example, the control device  142  is coupled to the reservoir  216 . In particular, in this example, the control device  142  is coupled to a top  219  of the reservoir  216 . As disclosed in further detail herein, the control device  142  includes electronic components to operate a flow control member and control the damping rate of the shock absorber  138 . In the illustrated example, the control device  142  includes an activation button  220 . In some examples, a user may press the activation button  220  to turn the control device  142  on or off and/or switch between an active mode and a sleep mode. In some examples, the control device  142  deactivates (e.g., enters a sleep mode) if no operations occur within the predetermined period of time (e.g., 5 minutes). In other examples, the control device  142  remains active until a user presses the activation button  220  again to turn the control device  142  off. Additionally or alternatively, in some examples, the control device  142  is used to change the damper states. For example, a single press may cause the control device  142  to enter a first damper state (e.g., an open state) and a double press may cause the control device  142  to enter a second damper state (e.g., a closed state or lockout mode). In the illustrated example, the control device  142  also includes an indicator light  222 . In some examples, the indicator light  222  illuminates for a predetermined amount of time (e.g., 5 seconds) when a state change is made (e.g., via manual selection or auto selection). In some examples, the color of the indicator light  222  changes to indicate the level of charge left in the battery of the control device  142 . Additionally or alternatively, the indicator light  222  may illuminate to indicate to a user that the control device  142  is activated or on. If the indicator light  222  does not illuminate after the user presses the activation button  220 , it may indicate to the user that the battery of the control device  142  needs to be recharged. 
       FIG. 3  is a side view of the shock absorber  138 . Some of the internal components of the shock absorber  138  are shown in dashed lines. In the illustrated example, the damper  202  includes a shaft  300  that is coupled to and extends from the cap  208 . A fixed piston  302  is coupled (e.g., via threaded engagement) to a top end  304  of the damper body  210 . In the illustrated example, the damper body  210  defines a first chamber  306 . The shaft  300  extends through the fixed piston  302  and into the first chamber  306 . The shaft  300  slides into and out of the damper body  210  through the fixed piston  302  as the shock absorber  138  compresses and rebounds. The fixed piston  302  is slidable within the air can  204 . During compression (when the air can  204  and the damper body  210  move toward each other), the fixed piston  302  is pushed into the air can  204 , which compresses a gas (e.g., air) within the air can  204 . After the compressive force is removed, the compressed gas in the air can  204  acts against the fixed piston  302  and pushes the fixed piston  302  (and, thus, the damper body  210 ) outward from the air can  204 . In other examples, the air can  204  can be filled with other types of fluids (e.g., oil). Father, while in this example the spring  200  is implemented by the air can  204 , in other examples a coil spring may be used. 
     The first chamber  306  in the damper body  210  is filled with fluid. The fluid may be, for example, oil, such as a mineral oil based damping fluid. In other examples, other types of damping fluids may be used (e.g., silicon or glycol type fluids). A piston  308  is coupled to a distal end of the shaft  300 . A fluid flow path  310  is defined between the first chamber  306  in the damper body  210  and a second chamber  312  defined in the reservoir  216 . In this example, the fluid flow path  310  is formed at least in part through the piston  308 , the shaft  300 , and the cap  208 . The piston  308  slides in the first chamber  306  of the damper body  210  as the shock absorber  138  compresses and extends. For example, when the shock absorber  138  compresses, the piston  308  is moved toward a bottom end  314  of the damper body  210  and into the first chamber  306 , which decreases the volume in the first chamber  308  and, thus, increases the pressure of the fluid in the first chamber  306 . As a result, the fluid in the first chamber  306  is pushed up through the fluid flow path  310  and into the second chamber  312  in the reservoir  216 . Conversely, during rebound, the piston  308  is moved in the opposite direction, i.e., away from the bottom end  314  of the damper body  210  and toward the top end  304  of the damper body  210 . The rebound movement is driven at least in part by the spring  200 . For example, after the compressive force is removed, the air can  204  causes the damper body  210  to move away from the cap  208 , which causes the piston  308  to slide (upward) in the first chamber  306 , thereby expanding the shock absorber  138 . This movement causes a decrease in pressure of the fluid in the first chamber  306 , which draws the fluid from the second chamber  312  back through the fluid flow path  310  and into the first chamber  306 . This movement or flow of fluid between the first and second chambers  306 ,  312  causes the damping effect. As disclosed in further detail herein, the example shock absorber  138  includes a flow control member that is disposed in the fluid flow path  310  that controls the flow of fluid between the first chamber  306  and the second chamber  312  to affect the compression and rebound damping rates. 
     While in the example shown in  FIG. 3  the control device  142  is implemented in connection with a shock absorber design having an external reservoir, it is understood that the example control device  142  and teachings herein may be similarly implemented in connection with a damper of a shock absorber that does not have an external reservoir. In particular, other damper designs include two chambers in the damper body  210  that are divided by the piston  308 . In such a design, the piston  308  may include a flow control member (e.g., a valve) to control the flow of fluid between the two chambers, thereby providing the damping effect. The electronic control device  142  may be used to operate the flow control member to adjust or modify the state of the damper. 
       FIG. 4  is perspective view of the example shock absorber  138 . In  FIG. 4 , the control device  142  is shown as separated from the reservoir  216 . In this example, the control device  142  is removably coupled to the reservoir  216  via threaded fasteners  400  (e.g., bolts, screws, etc.). Any number of threaded fasteners may be used. In other examples, the control device  142  may be coupled to the reservoir  216  via other mechanical and/or chemical fastening techniques. In some examples, the control device  142  is removably coupled to the reservoir  216  so that the control device  142  can be exchanged or replaced with another control device (e.g., if the control device  142  becomes inoperable or defective). This enables a user to easily replace the control device  142  with another control device without replacing the entire shock absorber  138 . In other examples, the control device  142  may be permanently coupled to the reservoir  216 . 
     In the illustrated example, the shock absorber  138  includes a head  402  that forms the top  219  of the reservoir  216 . The head  402  defines an internal dry portion  404  that is isolated from an internal wet portion (shown in  FIG. 8 ) in the reservoir  216  containing the fluid. The shock absorber  138  includes a sleeve  406  that extends through the head  402  between the internal dry portion  404  and the internal wet portion. 
     In the illustrated example, the shock absorber  138  includes an actuator  408 . The actuator  408  is coupled to a flow control member in the reservoir  216 . The actuator  408  may be rotated to adjust or modify the state of the flow control member and, thus, affect the damping rate of the shock absorber  138 . In the illustrated example, the actuator  408  extends through the sleeve  406  between the internal dry portion  404  and the internal wet portion. 
     When the control device  142  is coupled to the head  402  of the reservoir  216 , the control device  142  engages the actuator  408 . The control device  142  includes a motion device, such as a motor (shown in  FIG. 15 ), that, when activated, rotates the actuator  408  and, thus, operates the flow control member to affect the damping rate. In the illustrated example, the actuator  408  has a first protrusion  410 . The first protrusion  410  mates with a corresponding slot in a drive coupling in the control device  142  shown in  FIG. 5 . In this example, the first protrusion  410  has rectangular cross-section. In other examples, the first protrusion  410  may be shaped differently. 
       FIG. 5  is a bottom perspective view of the control device  142 . As shown in  FIG. 5 , the control device  142  includes a drive coupling  500  having a slot  502 . The slot  502  is shaped to receive the first protrusion  410  ( FIG. 4 ) of the actuator  408  ( FIG. 4 ). When the control device  142  is coupled to the head  402  ( FIG. 4 ) of the reservoir  216  ( FIG. 4 ), the first protrusion  410  of the actuator  408  extends into the slot  502  of the drive coupling  500 . As disclosed in further detail herein, the control device  142  can drive (e.g., rotate) the drive coupling  500  to rotate the actuator  408  and, thus, affect the damping rate of the shock absorber  138 . 
     In the illustrated example of  FIG. 5 , the control device  142  has a housing  504 . The housing  504  has a bore  506  (e.g., a recess). In this example, the drive coupling  500  is disposed in the bore  506 . When the control device  142  is coupled to the head  402  ( FIG. 4 ) of the reservoir  216  ( FIG. 4 ), the sleeve  406  ( FIG. 4 ) extends into the bore  506  and the first protrusion  410  ( FIG. 4 ) of the actuator  408  ( FIG. 4 ) extends into the slot  502  of the drive coupling  500 . In the illustrated example, the control device  142  has a seal  508  (e.g., an o-ring) in the bore  506  to provide a sealing interface between the housing  504  and the sleeve  406 . 
     To power the motion device (e.g., the motor) and other electronic components, the example control device  142  includes a battery  510 . The battery  510  may contain one or more batteries (e.g., a battery pack). In this example, the battery  510  is removably coupled to a terminal on the housing  504 , which is shown in further detail in connection with  FIGS. 15 and 19 . In the illustrated example, the battery  510  is removably coupled to the housing  504  via a latch  512 . In other examples, the battery  510  may be removably coupled to the housing  504  via other mechanisms. The battery  510  may be removed from the housing  504  and recharged and/or may be recharged while attached to the housing  504 . In other examples, the battery  510  may be charged while the battery  510  remains installed on the housing  504 . For example, the battery  510  or the housing  504  may have a charging port (e.g., a DC coaxial power port, a USB-A port, a USB-B port, a mini-USB port, a micro-USB port, etc.), and a power cable may be plugged into the charging port to charge the battery  510 . In some such examples, the battery  510  may not be removable from the housing  504 . When the control device  142  is coupled to the head  402  ( FIG. 4 ), the battery  510  extends along a side of the reservoir  216  ( FIG. 2 ), which reduces (e.g., minimizes) the overall height added to the shock absorber  138  by the control device  142 . In other examples, the control device  142  may not include an integrated battery. Instead, the control device  142  may connect to a battery that is external to the control device  142 . For example, some bicycles include a battery (e.g., mounted to the frame) for electric assist. In such an example, the control device  142  may be powered by the battery on the bicycle. In an embodiment, a battery attachment cover  511  may be included to protect battery attachment portions during shipping. 
       FIG. 6  is a partially exploded view of the example shock absorber  138 . In particular, the reservoir  216  is shown as exploded, but the damper  202  is not shown as exploded. The air can  204  and the control device  142  are not shown in  FIG. 6 . As shown in  FIG. 6 , the shaft  300  of the damper  202  extends from the cap  208  and through the fixed piston  302  into the damper body  210 . 
     As described above, the reservoir  216  is to be coupled to the cap  208 . In this example, the head  402  of the reservoir  216  is coupled to the cap  208  via threaded fasteners  600  (e.g., bolts, screws, etc.). Any number of threaded fasteners may be used. The threaded fasteners  600  extend through openings  602  in the head  402 . In other examples, the head  402  may be coupled to the cap  208  via other mechanical and/or chemical fastening techniques. A locator pin  604  may be disposed between the head  402  and the cap  208 . 
     The reservoir  216  includes a body  606  having a first end  608  and a second end  610  opposite the first end  608 . The body  606  is tubular. When the reservoir  216  is assembled, the head  402  is coupled (e.g., threadably coupled) to the first end  608  of the body  606 . The reservoir  216  includes a seal  612  (e.g., an o-ring) to create a fluid tight seal between the head  402  and the first end  608  of the body  606 . In the illustrated example, the reservoir  216  includes a plug  614  that is to be disposed in the second end  610  of the body  606  to seal the second end  610  of the body  606 . The plug  614  is sealed in the body  606  via a seal  616  (e.g., an o-ring). A retainer ring  618  may be used to lock the plug  614  in the second end  610  of the body  606 . The head  402  and the plug  614  seal the respective first and second ends  608 ,  610  of the body  606  such that a chamber is formed in the body  606 . 
     In the illustrated example of  FIG. 6 , the reservoir  216  includes a high pressure valve core  620  to be disposed in a port in the plug  614 . The high pressure valve core  620  is used to add/remove pneumatic fluid, such as air or nitrogen, to/from a pneumatic pressure chamber in the body  606 . A cap  622  and a seal  624  are to be disposed on the end of the high pressure valve core  620 . 
     In this example, the reservoir  216  includes an internal floating piston (IFP)  626  that is slidably disposed within the body  606 . The IFP  626  is used to separate fluid sections in the body  606 , as shown in further detail in connection with  FIG. 8 . A seal  628  (e.g., an o-ring) is disposed around the IFP  626  to prevent fluid from leaking between the two sections of the chamber. In some examples, a relief valve  630  is disposed in an opening through the IFP  626  to relieve excess pressure. A seal  632  (e.g., an o-ring) seals the relief valve  630 . In other examples, an IFP may not be provided in the reservoir  216 . 
     In the illustrated example, the shock absorber  138  includes a flow control member  634 . In this example, the flow control member  634  is part of the reservoir  216 . When the reservoir  216  is assembled, the flow control member  634  is disposed within the body  606 . The flow control member  634  controls the flow of fluid between the first chamber  306  ( FIG. 3 ) in the damping body  210  and the second chamber  312  ( FIG. 3 ) in the body  606 . When the reservoir  216  is assembled, two retainer rings  636 ,  638  are used to secure the flow control member  634  to the head  402 . 
     As described above, the top side of the head  402  defines the internal dry portion  404 . The bottom side of the head  402 , which is connected to the body  606 , forms an internal wet portion. The head  402  includes a wall or barrier (shown in  FIG. 8 ) that separates the internal dry portion  404  and the internal wet portion. As shown in  FIG. 6 , the head  402  has an opening  640 . When the head  402  is attached to the cap  208 , the opening  640  aligns with another opening in the head  402  forming the fluid flow path  310 . A passageway is defined in the head  402  between the opening  640  and the internal wet portion. 
     Also shown in  FIG. 6  is the actuator  408 . One end of the actuator  408  includes the first protrusion  410  and the opposite end of the actuator  408  includes a second protrusion  642 . When the reservoir  216  is assembled, the second protrusion  642  of the actuator  408  extends into the flow control member  634 . The actuator  408  can be rotated to adjust or modify a state of the flow control member  634  to cause a change in damping rate. In this example, the second protrusion  642  has a rectangular cross-section. In other examples, the second protrusion  642  may be shaped differentially. 
     As described above, when the reservoir  216  is assembled, the sleeve  406  extends through an opening in the barrier in the head  402 . A seal  644  (e.g., an o-ring) is to be disposed between the sleeve  406  ad the inner surface of the opening in the barrier. In the illustrated example, the reservoir  216  includes two bearings  646 ,  648 , a seal  650  (e.g., an o-ring), and two retainers  652 ,  654  that are disposed within the sleeve  406 . The bearings  646 ,  648 , the seal  650 , and the two retainers  652 ,  654  enable the actuator  408  to rotate smoothly and also provide a sealing interface between the actuator  408  and the sleeve  406  to prevent fluid leakage between the internal wet portion and the internal dry portion  404 . Another seal  651  (e.g., an o-ring) may be used. 
     In the illustrated example, the reservoir  216  includes a biasing member  656  (e.g., a coil spring) and a check plate  658 . The biasing member  656  biases the check plate  658  into engagement with the flow control member  634 . This arrangement forms a check valve to enable fluid flow during rebound, as disclosed in further detail herein. 
       FIG. 7  is a side view of the components of the shock absorber  138  of  FIG. 6  in an assembled state. The reservoir  216  is coupled to the cap  208 . 
       FIG. 8  is a cross-sectional view of the reservoir  216  and the cap  208  of the shock absorber  138  taken along line A-A of  FIG. 7 . As shown in  FIG. 8 , the head  402  is coupled to the cap  208  via the threaded fasteners  600  (one of which is shown in  FIG. 8 ). In the illustrated example, the first end  608  of the body  606  is threadably coupled to the head  402 . The seal  612  is disposed between the head  402  and the body  606  to seal the first end  608  of the body  606  to the head  402 . The plug  614  is disposed in and seals the second end  610  of the body  606 . The reservoir  216  defines the second chamber  312 , which houses or contains at least a portion of the damping fluid. The second chamber  312  is in fluid communication with the first chamber  306  ( FIG. 3 ) of the damping body  210  ( FIG. 3 ). 
     As shown in  FIG. 8 , the IFP  626  is disposed in the body  606 . The IFP  626  separates the second chamber  312  (e.g., a top portion) from a third chamber  800  (e.g., a bottom portion). In some examples, the third chamber  804  is filled with a pneumatic fluid, such as air or nitrogen. The IFP  626  moves up and down in the body  606  based on the pressure differential across the IFP  626 . The pneumatic fluid in the third chamber  800  may have a higher pressure or a lower pressure than the damping fluid in the second chamber  312 . When the shock absorber  138  is compressed, damping fluid is pushed into the second chamber  312  and the IFP  626  is pushed downward, thereby decreasing the volume of the third chamber  800  and compressing the pneumatic fluid in the third chamber  800 . When the shock absorber  138  rebounds (e.g., via force from the spring  200 ), the volume of the first chamber  306  ( FIG. 3 ) in the damper body  210  ( FIG. 3 ) increases and the damping fluid flows from the second chamber  312  back into the first chamber  306  in the damper body  210 . The compressed fluid in the second chamber  312  pushes against the IFP  626  to move the IFP  626  upward in the body  606 . While in this example an IFP is used, in other examples, the reservoir  216  may not include an IFP. 
     As shown in  FIG. 8 , the head  402  has a barrier  806  between the internal dry portion  404  and an internal wet portion  808 . The sleeve  406  extends through an opening  810  in the barrier  806 . The seal  644  is disposed is in a gland  812  in the barrier  806  around the opening  810  to prevent fluid from leaking through the opening  810 . In the illustrated example, the actuator  408  is disposed in the sleeve  406 . The actuator  408  is rotatable in the sleeve  406 . 
     As shown in  FIG. 8 , the flow control member  634  is disposed within the body  606  of the reservoir  216 . A portion of the flow control member  634  extends into the sleeve  406  and is engaged by the second protrusion  642  of the actuator  408 . A cavity  814  is defined between the flow control member  634  and the barrier  806  of the head  402 . The cavity  814  is fluidly connected to the opening  640  ( FIG. 6 ) in the head  402  via a passageway extending through the head  402 . The flow control member  634  separates the cavity  814  from the second chamber  312 . The flow control member  634  controls the flow of fluid between the cavity  814  and the second chamber  312 . Therefore, the fluid flow path  310  ( FIG. 3 ) between the first chamber  306  and the second chamber  312  is defined by portions of the shaft  300  ( FIG. 3 ), the cap  208 , the head  402 , and the cavity  814 . The flow control member  634  is disposed in the fluid flow path  310  (between the cavity  814  and the second chamber  312 ) and controls the flow of fluid between the first chamber  306  ( FIG. 3 ) and the second chamber  312 . As shown in  FIG. 8 , the actuator  408  and the flow control member  634  are aligned along an axis  816 . The axis  816  is the same as or aligned with the axis  218  of  FIG. 2 . 
       FIG. 9  is an exploded view of the flow control member  634 . In the illustrated example, the flow control member  634  includes a plug  900 , a seal  901 , a first seat  902 , a retainer  904 , a second seat  906 , a guide  908 , a first compression check plate  910 , a first shim stack  912 , a second compression check plate  914 , a second shim stack  916 , and a retaining nut  918 . 
     When the flow control member  634  is assembled, the plug  900 , the seal  901 , the first seat  902 , the retainer  904 , and the second seat  906  are disposed within the guide  908 . The plug  900  has a threaded section  920 , a first engaging portion  922 , a second engaging portion  924 , and a stem portion  923  between the first and second engaging portions  922 ,  924 . In the illustrated example, the stem portion  925  has an opening  927  that connects to a bore defined in the threaded portion  920 , described in further detail in connection with  FIG. 14 . As disclosed in further detail herein, the plug  900  is movable in the guide  908  to control the flow of fluid through across the flow control member  634 . When the flow control member  634  is assembled, the guide  908  extends through the first compression check plate  910 , the first shim stack  912 , the second compression check plate  914 , and the second shim stack  916 . In the illustrated example, the guide  908  has a threaded section  926 . The retaining nut  918  is to be threaded onto the threaded section  926  of the guide  908  to secure the first compression check plate  910 , the first shim stack  912 , the second compression check plate  914 , and the second shim stack  916  on the guide  908 . As shown in  FIG. 9 , the first compression check plate  910  includes a plurality of inner openings  928  (one of which is referenced in  FIG. 9 ) that extend through or across the first compression check plate  910 . The first compression check plate  910  also includes a plurality of outer openings  930  (one of which is referenced in  FIG. 9 ) that extend through or across the first compression check plate  910 . 
       FIG. 10  is a perspective view of the flow control member  634  in an assembled state, and  FIG. 11  is a side view of the flow control member  634  in an assembled state. As shown in  FIGS. 10 and 11 , the guide  908  extends through the first compression check plate  910 , the first shim stack  912 , the second compression check plate  914 , and the second shim stack  916 . The retaining nut  918  is threaded onto the guide  908 . 
     As shown in  FIG. 10 , the guide  908  has a first opening  1000 . The plug  900  is disposed in the first opening  1000 . The plug  900  has a slot  1002 . When the reservoir  216  is assembled, the second protrusion  642  ( FIGS. 6 and 8 ) of the actuator  408  ( FIG. 4 ) is to extend into the slot  1002 . When the flow control actuator  408  is rotated, the plug  900  is rotated in the first opening  1000  of the guide  908 . 
       FIGS. 12-14  are cross-sectional views of the flow control member  634  taken along line B-B of  FIG. 11 .  FIGS. 12-14  show the flow control member  634  in different operating states. In particular,  FIG. 12  shows the flow control member  634  in an open state,  FIG. 13  shows the flow control member  634  in a partially closed state (which may also be referred to as a partially open state), and  FIG. 14  shows the flow control member  634  in a closed state. 
     Referring to  FIG. 12 , the guide  908  has a passageway  1200  between the first opening  1000  and a second opening  1202  at end opposite end of the guide  908 . The first seat  902  is disposed in the passageway  1200  and forms a first orifice  1204 , and the second seat  906  is disposed in the passageway  1200  and forms a second orifice  1206 . The plug  900  is disposed in the passageway  1200 . The plug  900  is movable in the guide  908 . In particular, the threaded section  920  of the plug  900  is engaged with threads  1208  in the passageway  1200  near the first opening  1000 . When the plug  900  is rotated, the plug  900  translates (e.g., moves linearly) along the axis  816  in the passageway  1200 . In the position shown in  FIG. 12 , the first engaging portion  922  of the plug  900  is spaced apart from the first seat  902 , and the second engaging portion  924  is spaced apart from the second seat  906 . This state or position may be referred to as a fully open position. 
     During rebound and compression, fluid may flow across the flow control member  634  between the cavity  814  ( FIG. 8 ) and the second chamber  312  ( FIG. 8 ). In the illustrated example, the guide  908  has a plurality of openings  1210  (two of which are referenced in  FIG. 12 ). The openings  1210  are spaced apart around the guide  908 . Any number of openings  1210  may be implemented (e.g., one opening, two openings, etc.). When the flow control member  634  is disposed in the reservoir  216  ( FIG. 8 ), the openings  1210  of the guide  908  are in fluid communication with the cavity  814 , and the second opening  1202  of the guide  908  is in fluid communication with the second chamber  312  ( FIG. 8 ). 
     A compression flow path line  1212  is shown in  FIG. 12 . During compression, fluid flows from the cavity  814  ( FIG. 8 ), through the openings  1210  into the passageway  1200 , through the first and second orifices  1204 ,  1206 , and through the second opening  1202  into the second chamber  800  ( FIG. 8 ). In this state, the flow control member  634  provides relatively low resistance (low damping) during compression. 
     During rebound, fluid can flow in the opposite direction along the flow path line  1212  across the flow control member  634 . Additionally, during rebound, fluid can flow across the first compression check plate  910  through the outer openings  930  (one of which is referenced in  FIG. 12 ). (Although not shown completely, the openings  930  extend fully through the first compression check plate  910 ). A rebound flow path line  1214  is shown in  FIG. 12 . When the flow control member  634  is assembled in the reservoir  216 , the check plate  658  ( FIG. 6 ) is biased against the top side of the first compression check plate  910  and blocks the outer openings  930 . During compression, the outer openings  930  remain blocked by the check plate  658 . However, during rebound, the pressure of the fluid in the outer openings  930  forces the check plate  658  away from the first compression check plate  910  (against the bias of the biasing member  656  ( FIG. 6 )) and enables the fluid to flow into the cavity  814  ( FIG. 8 ). 
     Referring to  FIG. 13 , the plug  900  has been rotated such that the plug  900  has translated in the passageway  1200  of the guide  908  toward the first and second seats  902 ,  906 ). In the position shown in  FIG. 13 , the first engaging portion  922  of the plug  900  is spaced apart from the first seat  902 . However, the second engaging portion  924  of the plug  900  is engaged with the second seat  906 , thereby preventing fluid flow through the second orifice  1206  of second seat  906 . Therefore, fluid is prevented from flowing in/out of the passageway  1200  through the second opening  1202  of the guide  908 . This position or state may be referred to as a partially open or partially closed state. 
     A compression flow path line  1300  is shown in  FIG. 13 . During compression, fluid flows from the cavity  814  ( FIG. 8 ), through the openings  1210  in the guide  908  into the passageway  1200 , through the first orifice  1204  in the first seat  902 , and through a plurality of openings  1302  (two of which are reference in  FIG. 13 ) in the guide  908  and into the second compression check plate  914 . The openings  1302  are spaced apart around the guide  908 . Any number of openings  1302  may be implemented (e.g., one opening, two openings, etc.). The second compression check plate  914  is covered with the second shim stack  916 . The fluid in the second compression check plate  914  forces the second shim stack  916  to bend open, thereby enabling the fluid to flow into the second chamber  312 . In this state, the flow control member  634  provides relatively high resistance (high damping) during compression. 
     During rebound, the fluid is prevented from flowing through the passageway  1200  by the second engaging portion  924  of the plug  900  and the second shim stack  916 . Instead, fluid flows across the first compression check plate  910  via the rebound flow path line  1214 , which is the same as disclosed above in connection with  FIG. 12 . 
     Referring to  FIG. 14 , the plug  900  has been rotated such that the plug  900  has translated in the passageway  1200  of the guide  908  further toward the first and second seats  902 ,  906 . In the position shown in  FIG. 14 , the first engaging portion  922  of the plug  900  is engaged with the first seat  902 , thereby preventing fluid flow through the first orifice  1204  of the first seat  902 . Additionally, the second engaging portion  924  is engaged with the second seat  906 , thereby preventing fluid flow through the second orifice  1206  of the second seat  906 . As such, fluid is prevented from flowing through the passageway  1200 . This position or state may be referred to as a closed state or lockout mode. In this lockout mode, the flow control member  634  provides relatively high damping to substantially limit movement of the shock absorber  138 . 
     A compression flow path line  1400  is shown in  FIG. 14 . If the pressure of the fluid in the cavity  814  ( FIG. 8 ) reaches a threshold, the fluid flows through the inner openings  928  in the first compression check plate  910  and bends open the first shim stack  912 , thereby enabling the fluid to flow into the second chamber  312  ( FIG. 8 ). Therefore, in this lockout mode, the flow control member  634  still allows some fluid flow under relatively high forces, such as where a rider comes down off of a jump and lands hard on the ground. This enables a blow off of some of the pressure in the first chamber  306  ( FIG. 3 ) of the damping body  210  ( FIG. 3 ). 
     During rebound, the fluid is prevented from flowing through the passageway  1200  by the second engaging portion  924  of the plug  900  and the second shim stack  916 . Instead, fluid flows across the first compression check plate  910  via the rebound flow path line  1214 , which is the same as disclosed above in connection with  FIG. 12 . While three positions are shown in  FIGS. 12-14 , it is understood that the plug  900  can also be moved to various positions between any of these three positions. Moving the plug  900  further or closer to the first and/or second seats  902 ,  906  affects the damping rate. The plug  900  may be moved to any position to achieve a desired or optimal flow rate. 
     Referring briefly back to  FIG. 8 , the top of the guide  908  is disposed in the sleeve  406 . The actuator  408  has a flange  818  that is engaged with the guide  908  and seals the first opening  1000  of the guide  908 . The second protrusion  642  of the actuator  408  extends into the slot  1002  in the plug  900 . When the actuator  408  is rotated, the actuator  408  rotates the plug  900 , which causes the plug  900  to translate (e.g., move linearly) in the guide  908  along the axis  816 . The second protrusion  642  has a sufficient length to remain engaged in the slot  1002  while the plug  900  moves up or down in the guide  908 . As disclosed in further detail herein, the shock absorber  138  includes a motor that, in response to a command signal (e.g., a wireless signal), rotates the actuator  408 , thereby moving the plug  900  to change the damping rate of the shock absorber  138 . 
     In some examples, the flow control member  634  includes a feature to reduce the pressure differential on the plug  900 , which reduces (e.g., minimizes) the amount of force needed to move the plug  900 . For example, referring to  FIG. 14 , the plug  900  has the opening  927 . The opening  927  fluidly couples the passageway  1200  (between the first and second seat  902 ,  906 ) and a bore  1400  formed in the threaded section  920  of the plug  900 . Therefore, the opening  927  enables fluid to bypass the first seat  902  and the first engaging portion  922  and fill the threaded section  920  of the plug  900  and the upper part of the guide  908 . (The upper part of the guide  908  is sealed via the flange  818  ( FIG. 8 ) of the actuator  418  ( FIG. 8 )). When the plug  900  is in the position shown in  FIG. 14 , the plug  900  is engaged with the seal  901 , which prevents the higher pressure fluid in the cavity  814  ( FIG. 8 ) from leaking up into the bore  1500  and the upper part of the guide  908 . As such, the pressure on both sides of the first engaging portion  922  of the plug are substantially balanced with the lower pressure fluid in the passageway  1200  and/or the second chamber  312  ( FIG. 8 ). This helps reduce the pressure differential on the plug  900  and, thus, the force needed to move the plug  900  up and down in the passageway  1200 . As a result, a smaller, less powerful motor can be used. As such, in this example, the flow control member  634  operates a spool valve. In other examples, in addition to or as an alternative to the opening  927  formed in the plug  900 , a channel or passageway may be formed in the guide  908  that fluidly couples the passageway  1200  (between the first and second seats  902 ,  906 ) and the upper part of the guide  908 , which similarly bypasses the first seat  902  and the first engaging portion  922 . In other examples, the flow control member  634  does not include a pressure balancing feature. 
       FIG. 15  is an exploded view of the example control device  142 . The control device  142  includes a terminal  1500  (e.g., a battery interface or adapter) to receive the battery  510  ( FIG. 5 ). In the illustrated example, the terminal  1500  includes a printed circuit board (PCB)  1502  with electrical pins  1504  (one of which is referenced in  FIG. 15 ). When the control device  142  is assembled, the PCB  1502  is disposed in the housing  504 . The PCB  1502  is coupled to the housing  504  via threaded fasteners  1506  (e.g., bolts, screws, etc.) (one of which is referenced in  FIG. 15 ). Any number of threaded fasteners may be used. The terminal  1500  also includes a face plate  1510  that is to be coupled to the housing  504  over the PCB  1502 . A gasket  1512  may be disposed between the face plate  1510  and the housing  504 . The face plate  1510  is coupled to the housing  504  via threaded fasteners  1514  (e.g., bolts, screws, etc.) (one of which is referenced in  FIG. 15 ). Any number of threaded fasteners may be used. The face plate  1510  has openings  1518  (one of which is referenced in  FIG. 15 ). When the control device  142  is assembled, the electrical pins  1504  align with corresponding ones of the openings  1518 . The electrical pins  1504  may extend partially into or fully through the openings  1518  in the face plate  1510 . The control device  142  includes seals  1508  (one of which is referenced in  FIG. 15 ) that seal the openings  1518  through which the electrical pins  1504  extend. The battery  510  ( FIG. 5 ) has corresponding pins or contacts that match the arrangement of the electrical pins  1504  and the openings  1518 . As such, when the battery  510  is connected to the terminal  1500 , the pins on the battery  510  contact the electrical pins  1504  to provide power to the electrical components of the control device  142 . In the illustrated example, the control device  142  includes a seal  1516 . When the battery  510  is connected to the terminal  1500 , the seal  1516  helps prevent liquid and debris from coming into contact with the electrical pin connection. 
     As disclosed above, the control device  142  includes the latch  512  that can be used to secure the battery  510  to the terminal  1500 . In the illustrated example, the latch  512  has a tab  1520 . The latch  512  is pivotably coupled to the housing  504  via a pin  1522 . When the battery  510  ( FIG. 5 ) is placed on the terminal  1500 , the latch  512  can be rotated toward the battery  510  until the tab  1520  engages a corresponding ledge on the battery  510 , thereby securing the battery  510  to the terminal  1500 . 
     In the illustrated example, the housing  504  defines a cavity  1524 . The cavity  1524  is used to house one or more components. At least a portion of the housing  504  may be constructed of a rigid material, such as plastic or metal, to protect the components within the housing  504 . 
     To move (e.g., rotate) the actuator  408  ( FIG. 4 ) and thereby control the flow control member  634  ( FIG. 6 ), the control device  142  includes a motion device. In this example, the motion device is implemented as a motor  1526  (e.g., a DC electric motor). As such, the motor  1526  is used to operate the flow control member  634  ( FIG. 6 ) to affect fluid flow between the first chamber  306  ( FIG. 3 ) and the second chamber  312  ( FIG. 8 ). In other examples, another type of motion device may be implemented, such as a solenoid valve or a linear slide. When the control device  142  is assembled, the motor  1526  is disposed in the cavity  1524  of the housing  504 . The motor  1526  is coupled to the housing  504  via threaded fasteners  1528  (e.g., bolts, screws, etc.) (one of which is referenced in  FIG. 15 ). Any number of threaded fasteners may be used. In this example, the motor  1526  is part of a motor assembly  1530 , which is discussed in further detail in connection with  FIGS. 16-18 . 
     In some examples, the control device  142  includes one or more gears (e.g., a gear arrangement) to transfer rotational motion from the motor  1526  to the actuator  408  ( FIG. 8 ) and, thus, to the plug  900  ( FIG. 9 ). In this example, the control device  142  includes a worm gear arrangement or drive. For example, the control device  142  of  FIG. 15  includes a worm  1532  that is driven by the motor  1526 . The worm  1532  has a first end  1534  that is to be inserted into the motor assembly  1530 . The motor  1526  can be activated to rotate the worm  1532  in a first direction or a second direction opposite the first direction. When the control device  142  is assembled, the worm  1532  is disposed in the cavity  1524 . A second end  1536  of the worm  1532  is supported by and rotates within a bearing  1538  that is also disposed in the cavity  1524 . 
     The control device  142  also includes a worm gear  1540  (sometimes referred to as a worm wheel). When the control device  142  is assembled, the worm gear  1540  is disposed in the cavity  1524  and engaged with (e.g., meshed with) the worm  1532 . The worm gear  1540  is fixedly coupled to or integrated with the drive coupling  500 . When the control device  142  is assembled and coupled to the head  402  ( FIG. 4 ), the first protrusion  410  ( FIG. 4 ) on the actuator  408  ( FIG. 8 ) is engaged with the drive coupling  500 . The worm gear  1540  and the drive coupling  500  are aligned along the axis  816 , along which the actuator  408  ( FIG. 4 ) and the plug  900  ( FIG. 9 ) are aligned. Therefore, when the motor  1526  is activated, the motor  1526  rotates the worm  1532 , which rotates the worm gear  1540 , which rotates the actuator  408  to move the plug  900 . As such, in this example, the motor  1526  is operatively coupled to the plug  900  via a worm gear. 
     In the illustrated example, the control device  142  includes two bearings  1542 ,  1544  to enable the drive coupling  500  and the worm gear  1540  to rotate smoothly. A cover  1546  is used to couple the drive coupling  500  and the worm gear  1540  to the housing  504  between the two bearings  1542 ,  1544 . The cover  1546  is coupled to the housing  504  via threaded fasteners  1548  (e.g., bolts, screws, etc.) (one of which is referenced in  FIG. 15 ). Any number of threaded fasteners may be used. 
     The worm gear arrangement enables the motor  1526  to be orientated generally perpendicular to the axis of rotation of the drive coupling  500 . In particular, the motor  1526  and the worm  1532  are oriented along an axis  1550 , while the drive coupling  500 , the worm gear  1540 , the actuator  408  ( FIG. 4 ), and the plug  900  ( FIG. 9 ) are oriented along the axis  816 . In this example, the axis  1550  is perpendicular to and offset from the axis  816 . This arrangement enables the height of the control device  142  to remain relatively small, as compared to orienting the motor  1526  in line with or parallel to the axis  816 . Additionally, worm gear arrangements are advantageous because worm gear arrangement enable efficient rotation in one direction by the worm  1532 , but prevent or reduce back-drive by the worm gear  1540 . For example, after the motor  1526  moves the plug  900  ( FIG. 9 ) to a desired location in the flow control member  634  ( FIG. 6 ), the pressure on the plug  900  does not back-drive the motor  1526 . As such, the motor  1526  does not need to provide a brake or constant torque to hold the plug  900  in a desired location. Further, a locking or biasing member is not required to hold the plug  900  in the desired location. In addition to being offset from the axis  816 , the axis  1550  of motor  1526  is also offset from (e.g., not aligned with) the axis  206  ( FIG. 2 ) along which the spring  200  and the damper  202  are aligned and moved. 
     While in this example a worm gear arrangement is used to transfer rotational motion between the motor  1526  and the actuator  408  ( FIG. 4 ), in other examples, other drive arrangements may be used. For example, the motor  1526  may be directly connected to the drive coupling  500  or the actuator  408 . In other examples, one or more gears or gear arrangements may be disposed between the motor  1526  and the actuator  408 . 
     To control the motor  1526 , the control device  142  includes a printed circuit board (PCB)  1552 . The PCB  1552  has circuitry  1553 . The circuitry  1553  implements a controller for activating and controlling the motor  1526  (e.g., activating and deactivating the motor, controlling the direction or rotation, controlling the speed of the motor, etc.) and/or any other operation of the control device  142 . For example, the circuitry  1553  is to, based on a command signal, activate the motor  1526  to operate the flow control member  634  ( FIG. 6 ). The circuitry  1553  may include any analog or digital circuit(s), logic circuit(s), programmable processor(s), programmable controller(s), application specific integrated circuit(s) (ASIC(s)), programmable logic device(s) (PLD(s)) and/or field programmable logic device(s) (FPLD(s)), for example. While in this example the circuitry  1553  is implemented in the PCB  1552 , in other examples, some of the circuitry may be implemented in the PCB  1552  and other parts of the circuitry may be implemented in another circuit board or hardware component. Further, the circuitry  1553  may be implemented in one or more other types of circuit boards or hardware, such as a printed circuit board assembly (PCBA), or a flexible printed circuit. The electrical pins  1504  on the PCB  1502  are electrically coupled to the PCB  1552 . When the control device  142  is assembled, the PCB  1552  is disposed in the cavity  1524 . The PCB  1552  is disposed over the motor assembly  1530 , the worm  1532 , and the worm gear  1540 . The PCB  1552  is coupled to the housing  504  via threaded fasteners  1554  (e.g., bolts, screws, etc.) (one of which is referenced in  FIG. 15 ). Any number of threaded fasteners may be used. 
     In some examples, the control device  142  includes a wireless transceiver  1556  with an antenna to transmit and/or receive signals, such as command signals. For example, the wireless transceiver  1556  may receive wireless command signals from the controller  154  ( FIG. 1 ). The wireless command signal may be generated automatically (e.g., based on measured parameters of the bicycle  100 ) and/or via user input. The circuitry  1553  on the PCB  1552  processes the commands and activates the motor  1526  accordingly. For example, the wireless transceiver  1556  may receive a command to put the damper  202  ( FIG. 2 ) in a lockout mode ( FIG. 14 ). In such an instance, the PCB  1552  activates the motor  1526  to move the plug  900  ( FIG. 9 ) of the flow control member  634  ( FIG. 6 ) to the position shown in  FIG. 14 . Additionally or alternatively, the wireless transceiver  1556  may transmit information, such as the current state of the damper, to a remote device (e.g., the controller  154 ). 
     In this example, the wireless transceiver  1556  is disposed on the PCB  1552 . In other examples, the wireless transceiver  1556  may be separate from the PCB  1552 . The wireless transceiver  1556  may transmit and/or receive data via any wireless protocol, such as Bluetooth®. While in this example the circuitry  1553  for controlling the motor  1526  and the wireless transceiver  1556  are implemented on the PCB  1552 , in other example, the circuitry  1553  and/or the wireless transceiver  1556  may disposed on multiple PCBs. Further, while in this example the control device  142  includes a wireless transceiver capable of sending and receiving signals, in other examples, the control device  142  may only include a receiver to receive signals. 
     In the illustrated example, the control device  142  includes an inner cover  1558  and an outer cover  1560 . When the control device  142  is assembled, the inner and outer covers  1558 ,  1560  are coupled to the housing  504  over the cavity  1524  to protect the components within the cavity  1524 . The outer cover  1560  is coupled to the housing  504  via threaded fasteners  1562  (e.g., bolts, screws, etc.) (one of which is referenced in  FIG. 15 ). Any number of threaded fasteners may be used. The outer cover  1560  forms part of the housing  504  of the control device  142  that contains and protects the sensitive electronical components. In some examples, the inner cover  1558  is a seal, which may be constructed of a compliant material (e.g., rubber). When the outer cover  1560  is coupled to the housing  504 , the inner cover  1558  is compressed, which helps seal and protect the inside of the housing  504  from liquid and debris. While in this example the control device  142  includes two covers, in other examples, the control device  142  may only include one cover (e.g., only the outer cover  1560 ) or more than two covers. 
     As disclosed above, the PCB  1552  is disposed over the motor assembly  1530  and other parts in the cavity  1524  of the housing  504 . In some examples, this placement reduces interference of wireless signals to/from the wireless transceiver  1556  compared to other locations. Additionally or alternatively, in some examples, at least a portion of the housing  504  is constructed of a radio frequency transparent material to reduce to prevent signal interference. For example, the inner and outer covers  1558 ,  156  may constructed of radio frequency transparent materials, such as Teflon, polyethylene, polypropylene, polystyrene, polyvinyl chloride (PVC), acrylonitrile butadiene styrene (ABS), and/or other polymers or materials. 
     Also shown in  FIG. 15  are the threaded fasteners  400 . The threaded fasteners  400  are used to connect the control device  142  to the top of the reservoir  216 . Therefore, in this example, the control device  142 , including the PCB  1552 , the motor  1526 , and the battery  510 , is removably coupled to the top of the reservoir  216 . However, in other examples, one or more components of the control device  142  may be fixedly coupled to and/or otherwise integrated with the reservoir  216 . 
     Also shown in  FIG. 15  is the power button  220  and the indicator light  222 . The power button  220  and the indicator light  222  are connected to the outer cover  1560  and in circuit with the PCB  1552 . Also shown in  FIG. 15  is the seal  508 . 
       FIG. 16  is an exploded view of the motor assembly  1530  including the motor  1526 . The motor  1526  has electrical wires or leads  1600  to be connected to the PCB  1552  ( FIG. 15 ). The motor assembly  1530  includes a drive coupling  1602  with a slot  1604 . The slot  1604  is to receive the first end  1534  ( FIG. 15 ) of the worm  1532  ( FIG. 15 ). When the motor  1526  is activated, the motor  1526  rotates the drive coupling  1602 , which thereby rotates the worm  1532 . 
     In this example, the motor assembly  1530  utilizes a planetary gear arrangement to drive the drive coupling  1602 . The motor  1526  has an output shaft  1606  extending from an end  1608  of the motor  1526 . A drive gear  1610  (which may also be referred to as a sun gear) is fixedly coupled to the output shaft  1606 . When the motor  1526  is activated, the motor  1526  rotates the output shaft  1606 , which rotates the drive gear  1610 . 
     In the illustrated example, the motor assembly  1530  includes three planetary gears  1612 . The drive coupling  1602  has a post  1614  extending from a bottom side of the drive coupling  1602 . When the motor assembly  1530  is assembled, the planetary gears  1612  are engaged with (e.g., meshed with) the drive gear  1610 , and the post  1614  on the drive coupling  1602  extends into a center of one of the planetary gears  1612 . When the drive gear  1610  is rotated by the motor  1526 , the drive gear  1610  rotates the planetary gears  1612  around the drive gear  1610 , which rotates the drive coupling  1602 . The drive coupling  1602  rotates the worm  1532  ( FIG. 15 ), which rotates the worm gear  1540  and the drive coupling  500 , which rotates the actuator  408 , which rotates the plug  900  ( FIG. 9 ) and causes the plug to move it the guide  908 . In this manner, rotation of the output shaft  1606  causes translation (linear movement) of the plug  900 . In other examples, the motor assembly  1530  may utilize other types of gear arrangements to drive the drive coupling  1602 . 
     In the illustrated example, the motor assembly  1530  includes a first bracket  1616  and a second bracket  1618 . When the motor assembly  1530  is assembled, the first and second brackets  1616 ,  1618  are coupled to the motor  1526 . In particular, the first bracket  1616  is to be coupled to the end  1608  of the motor  1526  via threaded fasteners  1620 , and the second bracket  1618  is to be coupled to the first bracket  1616  via threaded fasteners  1622 . Any number of threaded fasteners may be used. The first bracket  1616  has an opening  1624 . When the motor assembly  1530  is assembled, the drive gear  1610  extends through the opening  1624 . Further, the drive coupling  1602  and the planetary gears  1612  are disposed between the first and second brackets  1616 ,  1618 . A plate  1626  is disposed between the planetary gears  1612  and a top  1628  of the first bracket  1616 . The planetary gears  1612 , when rotated, slide on the plate  1626  around the drive gear  1610 . 
     In the illustrated example, the second bracket  1618  includes an opening  1628  to receive the first end  1534  ( FIG. 15 ) of the worm  1532  ( FIG. 15 ). The first end  1534  of the worm  1532  extends through the opening  1628  in the second bracket  1618  and into the slot  1604  of the drive coupling  1602 . A bearing  1630  is provided in the opening  1628  to enable the drive coupling  1602  and the worm  1532  to rotate smoothly. 
       FIG. 17  is a perspective view of the motor assembly  1530  in an assembled state. As shown in  FIG. 17 , the first and second brackets  1616 ,  1618  are coupled via the threaded fasteners  1622 . The first and second brackets  1616 ,  1618  include openings  1700  to receive the threaded fasteners  1528  ( FIG. 15 ) to couple the motor assembly  1530  to the housing  504  ( FIG. 15 ). 
       FIG. 18  is a cross-sectional view of the motor assembly  1530  taken along line C-C of  FIG. 17 . As shown in  FIG. 18 , the threaded fasteners  1620  couple the first bracket  1616  to the end  1608  of the motor  1526 . The drive gear  1610 , the planetary gears  1612 , and the drive coupling  1602  are disposed between the first and second brackets  1616 ,  1618 . As shown in  FIG. 18 , the post  1614  on the drive coupling  1602  extends into a center of one of the planetary gears  1612 . Therefore, as the planetary gear  1612  rotates around the drive gear  1610 , the planetary gear  1612  spins or rotates the drive coupling  1602  about the axis  1550 . 
       FIG. 19  is a cross-sectional view of the control device  142  taken along line D-D of  FIG. 4 . As shown in  FIG. 19 , the first end  1534  of the worm  1532  extends into the slot  1604  of the drive coupling  1602 . Therefore, as the motor  1526  rotates the drive coupling  1602 , the drive coupling  1602  rotates the worm  1532 . The motor  1526  and the worm  1532  are aligned along the axis  1550 . 
     As shown in  FIG. 19 , the PCB  1552  is disposed over the motor  1526  near the inner and outer covers  1558 ,  1560 . As disclosed above, in some examples, the first and second covers  1558 ,  1560  are constructed of a radio frequency transparent material that enables wireless signals to propagate through the first and second covers  1558 ,  1560 . In other examples, the PCB  1552  can be disposed in another location. Also shown in  FIG. 19  is the terminal  1500  to which the battery  510  ( FIG. 5 ) connects. 
     In some examples, the PCB  1552 , the motor  1526 , and the battery  510  are part of the control device  142 , which is removably coupled to the reservoir  216 . However, in other examples, one or more the PCB  1552 , the motor  1526 , and/or the battery  510  may be integrated into the reservoir  216  or another part of the shock absorber  138 . For example, the PCB  1552 , the motor  1526 , and/or the battery  510  may be disposed in the internal dry portion  404  of the head  402 . 
     The illustrations of the embodiments described herein are intended to provide a general understanding of the structure of the various embodiments. The illustrations are not intended to serve as a complete description of all of the elements and features of apparatus and systems that utilize the structures or methods described herein. Many other embodiments may be apparent to those of skill in the art upon reviewing the disclosure. Other embodiments may be utilized and derived from the disclosure, such that structural and logical substitutions and changes may be made without departing from the scope of the disclosure. Additionally, the illustrations are merely representational and may not be drawn to scale. Certain proportions within the illustrations may be exaggerated, while other proportions may be minimized. Accordingly, the disclosure and the figures are to be regarded as illustrative rather than restrictive. 
     While this specification contains many specifics, these should not be construed as limitations on the scope of the invention or of what may be claimed, but rather as descriptions of features specific to particular embodiments of the invention. Certain features that are described in this specification in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable sub-combination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a sub-combination or variation of a sub-combination. 
     Although specific embodiments have been illustrated and described herein, it should be appreciated that any subsequent arrangement designed to achieve the same or similar purpose may be substituted for the specific embodiments shown. This disclosure is intended to cover any and all subsequent adaptations or variations of various embodiments. Combinations of the above embodiments, and other embodiments not specifically described herein, are apparent to those of skill in the art upon reviewing the description. 
     The Abstract of the Disclosure is provided to comply with 37 C.F.R. § 1.72(b) and is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. In addition, in the foregoing Detailed Description, various features may be grouped together or described in a single embodiment for the purpose of streamlining the disclosure. This disclosure is not to be interpreted as reflecting an intention that the claimed embodiments require more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive subject matter may be directed to less than all of the features of any of the disclosed embodiments. Thus, the following claims are incorporated into the Detailed Description, with each claim standing on its own as defining separately claimed subject matter. 
     It is intended that the foregoing detailed description be regarded as illustrative rather than limiting and that it is understood that the following claims including all equivalents are intended to define the scope of the invention. The claims should not be read as limited to the described order or elements unless stated to that effect. Therefore, all embodiments that come within the scope and spirit of the following claims and equivalents thereto are claimed as the invention.