Height-adjustable seatpost for bicycle and spacer for height-adjustable seatpost

Abstract

The invention relates to a height-adjustable seatpost for a bicycle and a spacer for the height-adjustable seatpost. An exemplary seatpost includes an upper tube and a lower tube configured in a telescopic arrangement and movable between at least a first position and a second position. The seating post includes an upper seal head, a lower seal head, a shaft coupled to the lower tube and extending through the lower seal head into the upper tube, and a piston in the upper tube and coupled to the shaft. The piston divides the upper tube into a first chamber between the piston and the upper seal head and a second chamber between the piston and the lower seal head. The seating post also includes a spacer in the second chamber between the piston and the lower seal head to reduce a length of the height adjustable seating post in at least one of the first position and the second position.

Description

Technical Field

[0001] The present disclosure generally relates to bicycle components, and more particularly, to a height-adjustable seat post for a bicycle and a spacer for a height-adjustable seat post. Background Art

[0002] Known bicycles have a seat or saddle to support a rider in a seated position. The seat is typically connected to the bicycle frame by a seat post. On most bicycles, the seat post can be manually adjusted to raise or lower the height of the seat to accommodate riders of different heights. The height can also be adjusted to accommodate different riding conditions. Typically, the seat post is mechanically clamped to a tube of the bicycle frame. When the clamp is released, the seat and seat post can slide up and down relative to the tube of the bicycle frame to adjust the height of the seat. On some of the more recent higher-end bicycles, the seat post height can be adjusted during bicycle riding by employing some type of hydraulically assisted mechanism. For example, a manually actuated hydraulically height-adjustable or "dropper" seat post can use a hydraulic pressure differential within the seat post and requires manual operation to adjust the seat post height. Some products can use ANT+ wireless communication technology, thereby allowing the rider to adjust the seat post wirelessly. Summary of the Invention

[0003] An exemplary height-adjustable seat post for a bicycle includes an upper tube to be coupled to a seat. The upper tube has an upper end and a lower end opposite the upper end. The height-adjustable seat post includes a lower tube coupled to the frame of the bicycle. The upper tube and the lower tube are configured in a telescoping arrangement and are movable between at least a first position and a second position. The height-adjustable seat post includes an upper seal head coupled to the upper tube at or near the upper end, a lower seal head coupled to the upper tube at or near the lower end, a shaft coupled to the lower tube and extending through the lower seal head and into the upper tube, and a piston in the upper tube, the piston being coupled to the shaft. The piston divides the upper tube into a first chamber between the piston and the upper seal head and a second chamber between the piston and the lower seal head. The height-adjustable seat post further includes a spacer in the second chamber between the piston and the lower seal head to reduce the length of the height-adjustable seat post in at least one of the first position and the second position.

[0004] An exemplary device for a bicycle includes a height - adjustable seat post. The height - adjustable seat post includes an upper tube and a lower tube. The upper tube and the lower tube are configured in a telescopic arrangement and are capable of moving between at least a first position and a second position. In the first position, the upper tube extends outwardly from the lower tube by a first length. The height - adjustable seat post includes a lower seal head located in the upper tube at or near the lower end, a shaft coupled to the lower tube and extending through the lower seal head into the upper tube, and a piston in the upper tube. The piston is coupled to the shaft. The piston divides the upper tube into a first chamber and a second chamber. The second chamber is defined between the piston and the lower seal head. The device further includes a spacer having a first end, a second end, and a central passage extending between the first end and the second end. The spacer is sized to be installed in the second chamber of the height - adjustable seat post, wherein the shaft extends through the central passage, and wherein, when the spacer is installed in the second chamber of the height - adjustable seat post, in the first position, the upper tube extends outwardly from the lower tube by a second length, and the second length is less than the first length. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 is a side view of an exemplary bicycle that can employ any of the exemplary height - adjustable seat posts disclosed herein.

[0006] Figure 2 is a side view of an exemplary height - adjustable seat post in a fully extended position.

[0007] Figure 3 is in a partially retracted position Figure 2 of an exemplary height - adjustable seat post.

[0008] Figure 4 is one that can be implemented Figure 2 on an exemplary height - adjustable seat post and is an enlarged view of an exemplary control module.

[0009] Figure 5 is in a fully extended position Figure 2 of a cross - sectional view of an exemplary height - adjustable seat post.

[0010] Figure 6 is in a partially retracted position Figure 3 of a cross - sectional view of an exemplary height - adjustable seat post.

[0011] Figure 7 is Figure 5 an enlarged view of a marked portion of, showing an exemplary piston assembly.

[0012] Figure 8 is in a fully extended position and includes an exemplary spacer in an exemplary negative chamber in an exemplary height - adjustable seat post Figure 2 of a cross - sectional view of an exemplary height - adjustable seat post.

[0013] Figure 9 is Figure 8 an enlarged view of an exemplary marked portion of

[0014] Figure 10 showing Figure 8 in a partially retracted position

[0015] Figure 11 is Figure 10 an enlarged view of an exemplary marked portion of

[0016] Figure 12 is Figure 8 a perspective view of an exemplary spacer as shown

[0017] Figure 13 is Figure 12 a top view of an exemplary spacer of

[0018] Figure 14 is Figure 12 a side view of an exemplary spacer of

[0019] Figure 15 is a cross-sectional view of an exemplary spacer of Figure 14 taken along line A-A of

[0020] Figure 16 is a perspective view of two exemplary spacers that can be installed in Figure 8 an exemplary height-adjustable seat post of

[0021] Figure 17 is a side view of two exemplary spacers of Figure 16 in a stacked configuration

[0022] Figure 18 is a cross-sectional view of two exemplary spacers of Figure 17 taken along line B-B of

[0023] Figure 19 is Figure 8 a partial exploded view of an exemplary height-adjustable seat post of

[0024] Figure 20 is Figure 19 an enlarged view of a marked portion of

[0025] Figure 21 is a cross-sectional view of an exemplary height-adjustable seat post of Figure 2 including an exemplary spacer in an exemplary lower chamber of an exemplary lower tube of the exemplary height-adjustable seat post

[0026] Figure 22 is of an exemplary spacer in an exemplary positive chamber in an exemplary height-adjustable seat postFigure 2 Cross-sectional view of an exemplary height-adjustable seat post.

[0027] The figures are not drawn to scale. Instead, the thickness of layers or regions may be enlarged in the figures. Generally, the same reference numerals will be used throughout the figures and the accompanying written description to refer to the same or like components.

[0028] When identifying multiple elements or components that can be individually referenced, the descriptors "first," "second," "third," etc. are used herein. Unless otherwise specified or understood based on their context of use, such descriptors are not intended to impart any meaning of precedence or temporal ordering, but rather are merely labels for individually referencing multiple elements or components to facilitate understanding of the disclosed examples. In some examples, the descriptor "first" may be used to refer to an element in a particular embodiment, while the same element may be referred to in the claims with a different descriptor (such as "second" or "third"). In such cases, it should be understood that such descriptors are used only to facilitate referencing multiple elements or components. Detailed Description

[0029] Some modern bicycles include a height-adjustable seat post, commonly referred to as a dropper seat post. This type of seat post allows the rider to change the height of their seat while riding the bicycle. For example, the rider can activate a seat post actuator on the handlebars and then push down on the seat (e.g., using their hips) to contract or compress the seat post, thereby lowering the height of the seat. When the rider stops activating the seat post actuator, the seat post remains in the contracted position. Then, when the rider desires to raise the seat, the rider can activate the seat post actuator again, and the seat post extends or expands to move the seat back to the original height. This lowering ability can be advantageous when the rider is about to ride down a steep slope. For example, when riding down a ramp, it is generally desirable to lower the seat so that the rider can stand up and move their body towards the rear of the bicycle (for better weight distribution), and the seat does not hit their hips. This lowering ability can also be used to lower the seat before the rider encounters an uphill, where the rider typically stands up to pedal. This adjustability can also be used in many other scenarios.

[0030] The height-adjustable seat post includes an upper tube and a lower tube configured in a telescoping arrangement. The lower tube is inserted into the bicycle frame and fixed via a clamp. The upper tube extends upward from the lower tube and supports the seat or saddle. The upper tube can be moved into and out of the lower tube between a fully extended position (also referred to as the apex position) and a fully retracted position (also referred to as the bottom position). These height-adjustable seat posts have a fixed stroke or travel range between the fully extended position and the fully retracted position set by the internal components and component dimensions of the seat post. For example, a typical seat post has a stroke range of 50 millimeters (mm) to 250 mm. When cycling, the rider can activate the seat post (e.g., by pressing a seat post actuation button) so that the upper tube can be pushed into the lower tube to lower the height of the seat. The seat post can be locked in any position between the fully extended position and the fully retracted position. When the rider wishes to raise the seat, the rider can stand up on the pedals and activate the seat post. The seat post automatically extends / expands back to the fully extended position. Thus, when the seat post is in the fully extended position, the seat post establishes a certain apex height for the seat. However, even when the lower tube is fully inserted into the bicycle frame (e.g., the upper collar abuts the bicycle frame), the seat height in the fully extended position may be too high for some riders to ride the bicycle correctly or comfortably. For example, some shorter riders or riders with a small inside leg dimension may desire the seat post to reach its highest point at a lower height.

[0031] Disclosed herein is an exemplary height-adjustable seat post with an exemplary spacer that can be used to reduce the overall height or length of the seat post when in the fully extended position. This allows the seat to reach its highest point at a lower height when in the fully extended position, which is advantageous for certain riders. In some examples, the seat post can be pre-assembled with the spacer. In other examples, the seat post and one or more spacers can be sold as a kit or assembly. Then, the user or rider can install the spacer themselves as needed.

[0032] Exemplary height - adjustable seatposts disclosed herein include an upper tube and a lower tube. The upper tube and the lower tube are configured in a telescoping arrangement and are movable between a fully extended (apex) position and a fully retracted (base) position. The lower tube is coupled or attached to a bicycle frame, and a seat is coupled to the upper tube. The upper tube can slide relative to the lower tube to adjust the height of the seat. The upper tube is sealed at both ends by an upper seal head and a lower seal head to form a pneumatic chamber filled with a pressurized gas (e.g., air, nitrogen). In some examples, the upper seal head includes a fill valve (e.g., Schrader valve) that can be used to add or remove pressurized gas from the pneumatic chamber. The seatpost includes a shaft coupled to the lower tube and extending into the upper tube. The seatpost includes a piston assembly disposed in the upper tube and coupled to the shaft. The piston assembly includes a piston that divides the pneumatic chamber into an upper chamber (positive gas chamber) and a lower chamber (negative gas chamber). The upper chamber biases the upper tube and the lower tube away from each other, and the lower chamber biases the upper tube and the lower tube toward each other. The piston assembly includes a valve that controls the flow of fluid between the upper chamber and the lower chamber through the piston. When the valve is in the closed state, the valve blocks or prevents gas from flowing between the two chambers. Regarding the terms "block" or "prevent", for the purposes of the following discussion, the terms "block" or "prevent" refer to the most restricted gas flow that can be achieved or desired. Thus, in one example, the term "block" or "prevent" means the cessation of all gas flow between the two chambers. However, in another example, the term "block" or "prevent" means that substantially all gas flow stops between the two chambers. The pressure in the upper pneumatic chamber is sufficient to support the weight of the rider. When it is desired to raise or lower the seat, the valve is switched to the open state, which allows gas to flow between the upper chamber and the lower chamber through the piston. This enables the rider to move the upper tube up or down relative to the lower tube, thereby raising or lowering the height of the seat.

[0033] When the seat post expands / extends or elongates to the fully extended position, the upper tube moves out of the lower tube, and thus the piston moves towards the lower seal head. In known seat posts, the piston can contact or engage the lower seal head, which causes the seat post to stop expanding / extending, thereby defining the fully extended (apex) position. Typically, an apex buffer is used to cushion this stop. In the examples disclosed herein, the seat post includes a spacer in the lower chamber between the piston and the lower seal head. The spacer reduces the amount of travel of the piston towards the lower seal head. When the seat post expands / extends or elongates, the piston eventually engages the top end of the spacer, while the bottom end of the spacer engages the lower seal head (and / or the buffer on the lower seal head). Thus, the piston stops at an earlier position along its travel path (e.g., against the lower seal head and / or the apex buffer). This reduces the overall height or length of the seat post in the fully extended position. Accordingly, the seat or saddle has a lower or reduced height in the fully extended position, which is advantageous and / or desirable for certain riders. For example, without a spacer, the seat post may have a first length in the fully extended position, while with a spacer, the seat post may have a second length that is less than the first length in the fully extended position. The spacer can have any desired height or length. In some examples disclosed herein, multiple spacers can be arranged in a stacked configuration in the lower chamber. Different numbers of spacers result in different height reductions.

[0034] In some examples, the seat post can be pre-assembled with the spacer. In other examples, the spacer can be provided separately from the seat post. For example, the seat post and one or more spacers can be sold as a kit or assembly, or as completely separate components. Then, the user or rider can install one or more spacers as needed. This allows the manufacturer to make a single size of seat post that can be easily adjusted to the height / length desired by the rider.

[0035] Turning now to the drawings, Figure 1 an example of a human-powered vehicle on which the exemplary seat post disclosed herein can be implemented is shown. In this example, the vehicle is a possible type of bicycle 100, such as a mountain bike. In the example shown, the bicycle 100 includes a frame 102 and a front wheel 104 and a rear wheel 106 that are rotatably coupled to the frame 102. In the example shown, the front wheel 104 is coupled to the front end of the frame 102 via a front fork 108. The front and / or forward riding direction or orientation of the bicycle 100 is indicated by Figure 1 the direction of arrow A in. Thus, the forward movement direction of the bicycle 100 is indicated by the direction of arrow A.

[0036] In Figure 1In the example shown, bicycle 100 includes a seat 110 (sometimes referred to as a saddle) coupled to a frame 102 (e.g., near the rear end of the frame 102 relative to the forward direction A) via a seat post 112 constructed in accordance with the teachings of the present disclosure. In the example shown, the seat post 112 is coupled to a seat tube 114 of the frame 102. In some examples, the seat post 112 is coupled to the seat tube 114 by a clamp 116 around an opening in the seat tube 114. The seat post 112 is adjustable in height to raise or lower the seat 110. In some examples, bicycle 100 includes a seat post actuation button 113 for controlling the seat post 112, and example operations thereof are disclosed in further detail herein. Bicycle 100 also includes handlebars 118 coupled to the frame 102 and a front fork 108 (e.g., near the front end of the frame 102 relative to the forward direction A) for steering the bicycle 100. In some examples, the seat post actuation button 113 is mounted on the handlebars 118 to enable a rider to interact with the seat post actuation button 113 while riding the bicycle 100. Bicycle 100 is shown on a riding surface 120. The riding surface 120 can be any riding surface, such as ground (e.g., dirt road, sidewalk, street, etc.), man-made structure above the ground (e.g., wooden ramp), and / or any other surface.

[0037] In the example shown, bicycle 100 has a drivetrain 122 that includes a crank assembly 124. The crank assembly 124 is operably coupled via a chain 126 to a sprocket assembly 128 mounted to a hub 130 of a rear wheel 106. The crank assembly 124 includes at least one and typically two crank arms 132 and pedals 134 and at least one front sprocket or chainring 136. A rear derailleur 138 (such as a chain shifter) is provided at the rear wheel 106 to move the chain 126 between different sprockets of the sprocket assembly 128. Additionally or alternatively, bicycle 100 can include multiple front chainrings and a front derailleur to move the chain 126 between the multiple chainrings.

[0038] Exemplary bicycle 100 can include a suspension system having one or more suspension components. In the example shown, bicycle 100 includes a rear suspension component 140. In this example, the rear suspension component 140 is implemented as or includes a shock absorber. In some examples, the front fork 108 is also implemented as a front suspension component. For example, a spring can be integrated into one of the legs and a damper can be integrated into the other leg. The front fork 108 and the rear suspension component 140 absorb shocks and vibrations when riding the bicycle 100 (e.g., when riding on rough terrain). In other examples, the front fork 108 and / or the rear suspension component 140 can be integrated into the bicycle 100 in other configurations or arrangements.

[0039] In some examples, one or more components of the bicycle 100 can include electronic components for controlling and / or monitoring various aspects of the bicycle 100. For example, Figure 1 the bicycle 100 includes a control device or bicycle computer 142 mounted on the handlebar 118. The bicycle computer 142 can communicate wirelessly with the seat post 112, the rear derailleur 138, the front fork 108, and / or the rear suspension component 140 to collect data and / or control the operation of the corresponding components. The bicycle computer 142 can also communicate wirelessly with the power meter 144 of the crank assembly 124. The above components can be paired with a wireless network.

[0040] Although Figure 1 the exemplary bicycle 100 depicted in is a type of mountain bike, the exemplary height-adjustable seat post disclosed herein can be implemented on other types of bicycles. For example, the exemplary seat post disclosed herein can be used on road bikes and bicycles with mechanical (e.g., cable, hydraulic, pneumatic, etc.) and non-mechanical (e.g., wired, wireless) drive systems. The exemplary seat post disclosed herein can also be implemented on other types of two-wheeled, three-wheeled, and four-wheeled human-powered vehicles. Additionally, the exemplary seat post disclosed herein can be used on other types of vehicles, such as motor vehicles (e.g., motorcycles).

[0041] Figure 2 is an exemplary height-adjustable seat post 112 that can be implemented on the Figure 1 bicycle 100. The seat post 112 can also be referred to as a telescopic seat post or a seat post assembly. The length or height of the exemplary seat post 112 is adjustable such that the height of the seat 110 ( Figure 1 ) can be raised or lowered. In the example shown, the seat post 112 includes a first tube 202 (referred to herein as the lower tube 202) and a second tube 204 (referred to herein as the upper tube 204). The lower tube 202 and the upper tube 204 can also be referred to as seat post portions or sections. As Figure 2 shown, the lower tube 202 and the upper tube 204 are configured in a coaxial arrangement and are aligned along an axis 206. The axis 206 corresponds to the central axis or longitudinal axis of the seat post 112. The lower tube 202 has a first end 208 (referred to herein as the upper end 208) and a second end 210 (referred to herein as the lower end 210) opposite the upper end 208. The upper tube 204 similarly has a first end 212 (referred to herein as the upper end 212) and a second end 500 (referred to herein as the lower end 500) (in Figure 5 and Figure 6as shown). The upper tube 204 and the lower tube 202 are configured in a telescoping arrangement. In particular, in this example, the upper tube 204 extends into an opening 213 in the upper end 208 of the lower tube 202. In this way, the upper tube 204 is at least partially disposed within the lower tube 202. The upper tube 204 can slide into and out of the opening 213 in the lower tube 202, which enables the overall height or length of the seat post 112 to be changed. In other examples, the lower tube 202 and the upper tube 204 can be configured such that the lower tube 202 extends into the lower end 500 of the upper tube 204.

[0042] In the example shown, the seat post 112 includes a seat clamp 214 that is coupled (e.g., welded, bolted, threaded, etc.) to the upper end 212 of the upper tube 204. The seat clamp 214 is used to couple the seat 110 ( Figure 1 ) to the seat post 112. In this example, the seat clamp 214 includes two threaded fasteners 216, 218 (e.g., bolts) that can be tightened to secure the seat 110 to the upper tube 204. In other examples, the seat post 112 can include other mechanisms for attaching to the seat 110. In the example shown, the seat post 112 includes a bottom cover assembly 220 that is coupled to the lower end 210 of the lower tube 202.

[0043] When the seat post 112 is installed on the bicycle 100 ( Figure 1 ), the lower tube 202 is coupled to the frame 102 ( Figure 1 ). For example, the lower tube 202 can be inserted into the seat tube 114 ( Figure 1 ) and secured by a clamp 116 ( Figure 1 ). The upper tube 204 extends upward from the lower tube 202 and supports the seat 110 ( Figure 1 ). As further disclosed in detail herein, the seat post 112 has an internal piston and valve that enables the upper tube 204 to move downward (e.g., slide) relative to the lower tube 202 and provides a resilient force to move the upper tube 204 upward relative to the lower tube 202. This enables the rider to easily lower or raise the height of the seat 110. The seat post 112 can be adjusted between the Figure 2 shown fully extended position (also referred to as the apex position) and the fully retracted position (also referred to as the bottom position), where in the fully retracted position, the upper tube 204 moves into the lower tube 202 until a stop or limit position is reached. The seat post 112 can also expand / contract to any position between the fully extended position and the fully retracted position and remain in place. For example, Figure 3 an example is shown where the upper tube 204 has been partially moved into the lower tube 202. In this way, compared to the position in Figure 2 , the seat 110 ( Figure 1) will be lowered or brought closer to the ground. Accordingly, the upper tube 204 and the lower tube 202 can move between at least a first position and a second position, where the first position can correspond to a fully extended position and the second position can correspond to a fully retracted position, or any position therebetween.

[0044] In Figure 2 the example shown, the seat post 112 includes a control module 222, which may also be referred to as a controller or control unit. The control module 222 includes a power source (e.g., a battery) and circuitry (e.g., processor circuitry, logic circuitry, etc.) to operate an internal valve of the seat post 112. In this example, the control module 222 is coupled to an outer surface 224 of the lower tube 202 at or near an upper end 208 of the lower tube 202. Some known telescoping seat posts position the control module on the seat clamp. However, this location may interfere with rear tire clearance. Accordingly, positioning the control module 222 at the upper end 208 of the lower tube 202, adjacent the overlapping region, can be beneficial for improving rear wheel clearance. This location also helps to maintain a minimum ratio of the drop height to the overall length.

[0045] As an exemplary operation, if a rider desires to lower the seat 110 ( Figure 1 ), then the rider actuates a seat post actuator, e.g., in this example, actuates a seat post actuation button 113 ( Figure 1 ). In Figure 1 , the seat post actuation button 113 is mounted on the handlebar 118 such that the rider can actuate the seat post actuation button 113 with one of their fingers (e.g., their thumb). Alternatively, the seat post actuation button 113 can be a lever / joystick or other type of user interface, such as a display device having a touch screen. When the seat post actuation button 113 is pressed, the seat post actuation button 113 sends a signal (e.g., a wireless signal) to the control module 222. The control module 222 receives the signal from the seat post actuation button 113 and activates an actuator or motor to open an internal valve in a pneumatic chamber in the upper tube 204, as further disclosed in detail herein. When the internal valve is opened, the rider can push down on the seat 110, which slides the upper tube 204 into the lower tube 202 (e.g., as Figure 3as shown in the position of, thereby reducing or decreasing the height of the seat 110. In some examples, the rider can apply this force by sitting on the seat 110 and using their hips to apply a downward force. When the seat 110 reaches the desired height, the rider can release the seat post actuation button 113. In response, the control module 222 closes the internal valve, which holds the upper tube 204 in place relative to the lower tube 202. When the rider wishes to raise the seat 110, the rider can press the seat post actuation button 113 again. The control module 222 receives the signal and opens the internal valve. When little or no downward force is acting on the seat 110 (e.g., the rider is standing on the pedals and not resting their hips on the seat 110), the internal pneumatic system pushes the upper tube 204 upward from the lower tube 202, thereby moving the seat 110 upward. The upper tube 202 moves upward until it reaches the fully extended position. Otherwise, when the desired position is reached, the rider can release the seat post actuation button 113. When the seat post actuation button 113 is released, the internal valve closes and holds the seat post 112 in the current position. Thus, the rider can easily adjust the seat post height.

[0046] In some examples, to activate the internal valve, the rider presses and holds the seat post actuation button 113. As long as the seat post actuation button 113 is pressed, the valve remains open, which allows the upper tube 204 to slide up or down relative to the lower tube 202. When the rider releases the seat post actuation button 113, the shuttle valve closes, which holds the upper tube 204 in place. However, in other examples, the system can be configured such that the rider can press and release the seat post actuation button 113 to open the valve, and then the rider presses the seat post actuation button 113 a second time to close the valve.

[0047] Figure 4 is an enlarged view of the control module 222 on the lower tube 202. In the example shown, the control module 222 includes a collar 400, a control housing 402 coupled to the collar 400, and a power source (in this example, a battery 404) coupled to the control housing 402. The collar 400 wraps around the lower tube 202 and is used to couple the control module 222 to the lower tube 202. In this example, the collar 400 includes a first portion 406a and a second portion 406b that are joined together and thus clamp around the lower tube 202. In some examples, the first portion 402a and the second portion 402b are joined by snap fit and / or threaded fasteners (e.g., screws, bolts, etc.). The control housing 402 contains electronic components for receiving control signals and operating the internal valve (e.g., opening the valve, closing the valve, etc.). For example, Figure 4A block diagram showing the control housing 402 is presented. The control housing 402 includes processor circuitry 408 and a wireless communication device 410. The wireless communication device 410 includes a receiver. The wireless communication device 410 can receive wireless control / command signals from the seat post actuation button 113 and / or another bicycle component such as a bicycle computer 142. Additionally, in some examples, the wireless communication device 410 can include a transmitter (e.g., transceiver) and can send wireless control / command signals to the seat post actuation button 113 and / or other bicycle components such as the bicycle computer 142. For example, in response to receiving a command, the processor circuitry 408 activates the motor (e.g., by applying current or voltage to the motor) to open an internal valve, enabling the seat post 112 to expand or contract. When the seat post actuation button 113 is released, no control / command signal is received, and the processor circuitry 408 activates the motor to close the valve, thereby holding the seat post 112 in its current position. In other examples, when the seat post actuation button 113 is released, a second or separate control / command signal is received. The wireless communication device 410 is configured for wireless communication and thus includes one or more antennas. The wireless communication device 410 provides wireless communication in any known or later-developed format. Although this specification describes components and functions that can be implemented in specific embodiments with reference to specific standards and protocols, the examples disclosed herein are not limited to such standards and protocols. For example, standards for Internet and other packet-switched network transmissions (e.g., TCP / IP, UDP / IP, HTML, HTTP, HTTPS) represent examples of the prior art. Such standards are periodically replaced by faster or more efficient equivalents having substantially the same functionality. It is also possible or alternatively to use ANT+ TM , ZigBee, WiFi, and / or AIREA TM standards. Accordingly, replacement standards and protocols having the same or similar functionality as those disclosed herein are considered to be equivalents thereof.

[0048] As used herein, "processor circuitry" is defined to include (i) one or more dedicated electrical circuits that are configured to perform particular operations and include one or more semiconductor-based logic devices (e.g., electrical hardware implemented by one or more transistors); and / or (ii) one or more general-purpose semiconductor-based electrical circuits that can be programmed with instructions to perform particular operations and include one or more semiconductor-based logic devices (e.g., electrical hardware implemented by one or more transistors). Examples of processor circuitry include programmable microprocessors, field programmable gate arrays (FPGAs) that can instantiate instructions, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), XPUs or microcontrollers, and integrated circuits such as application specific integrated circuits (ASICs). For example, an XPU can be implemented by a heterogeneous computing system that includes multiple types of processor circuitry (e.g., one or more FPGAs, one or more CPUs, one or more GPUs, one or more DSPs, etc. and / or combinations thereof) and an application programming interface (API) that can allocate computing tasks to any one or more of the multiple types of processor circuitry best suited to perform the computing tasks.

[0049] Battery 404 powers the electronic components of control housing 402, which controls a motor for operating a valve. Battery 404 also supplies power to energize or activate the motor. In some examples, battery 404 is removable, such as by pressing a release tab or button or sliding battery 404 in a direction away from control housing 402 ( Figure 4 ) to remove. In some examples, battery 404 can be removed, charged, and reattached to control housing 402. In other examples, battery 404 can be secured to seat post 112 in a manner that requires disassembly to remove (e.g., removing one or more screws). In some examples, battery 404 can be charged while battery 404 is attached to control housing 402. Battery 404 can be charged in a wired or wireless manner. For example, battery 404 can have a charging port or charging surface for charging. In other examples, battery 404 can be non-rechargeable and must be replaced with a new battery. In this example, a power source for powering the motor is attached to collar 400 at the upper end 208 of down tube 202. In some examples, battery 404 is fixed relative to down tube 202 (via collar 400) and is fixed relative to down tube 202 when mounted on bicycle 100 ( Figure 1 ). In other examples, battery 404 can be located in various locations, such as clamp 116 ( Figure 1 ) or collar 400 ( Figure 4) or the lower end 210 of the down tube 202. The battery 404 can also be mounted away from the seat post 112 and connected to the seat post 112 via electrical conductors (e.g., one or more wires extending through or along the frame 102).

[0050] Figure 5 is a cross-sectional view of the seat post 112 in the fully extended position corresponding to Figure 2 and Figure 6 is a cross-sectional view of the seat post 112 in the partially retracted position corresponding to Figure 3 . Figure 5 and Figure 6 show an example of the seat post 112 without a spacer. Figure 8 and Figure 9 show an example of the seat post 112 with an exemplary spacer, which is further disclosed in detail herein.

[0051] As Figure 5 and Figure 6 shown, the upper tube 204 has a lower end 500. The lower end 500 is disposed within the down tube 202. Thus, the down tube 202 and the upper tube 204 overlap at an overlapping region or area. In Figure 5 , the amount by which the upper tube 204 extends outward (e.g., upward) from the down tube 202 is defined by a first length L1, and in Figure 6 , the amount by which the upper tube 204 extends outward from the down tube 202 is defined by a second length L2 that is less than L1. Thus, Figure 6 the overall height or length of the seat post 112 in Figure 5 is less than the height or length of the seat post 112 in

[0052] As Figure 5 and Figure 6 shown, the upper tube 204 defines a chamber 502. The chamber 502 is filled with a fluid (e.g., a pneumatic gas), as discussed in further detail herein. The seat post 112 includes an upper seal head 504 (e.g., a plug or bushing) coupled to the upper tube 204 at or near the upper end 212. In this example, the upper seal head 504 is inside the upper tube 204, but in other examples it can be outside the upper tube 204. The seat post 112 also includes a lower seal head 506 coupled to the upper tube 204 at or near the lower end 500. In this example, the lower seal head 506 is inside the upper tube 204, but in other examples it can be outside the upper tube 204. The upper seal head 504 and the lower seal head 506 seal the ends of the upper tube 204 to retain the fluid in the chamber 502.

[0053] In Figure 5 and Figure 6In the example shown, the seat post 112 includes a shaft 508, which may be referred to as a rod. The shaft 508 is disposed within the down tube 202 and coupled to the down tube 202 (e.g., near the lower end 210), such that the shaft 508 is fixed relative to the down tube 202. For example, the lower cap assembly 220 includes a mounting member 509, which is disposed within the down tube 202 at the lower end 210 and coupled to the down tube 202. The bottom end of the shaft 508 is coupled to the mounting member 509. The shaft 508 extends upwardly through the down tube 202 and through the lower seal head 506 and into the upper tube 204. In particular, the shaft 508 extends through the lower seal head 506 and into a chamber 502 defined within the upper tube 204. When the seat post 112 expands or contracts, the lower seal head 506 may slide up and down along the shaft 508.

[0054] In Figure 5 and Figure 6 In the example shown, the seat post 112 includes a piston assembly 510 disposed within the upper tube 204. The piston assembly 510 may also be referred to as a valve assembly or a flow control assembly. The piston assembly 510 is disposed within the chamber 502 of the upper tube 204 and coupled to the shaft 508. When the seat post 112 expands or contracts, the piston assembly 510 moves closer to or farther from the upper end 212 and the lower end 500 of the upper tube 204. The piston assembly 510 includes a piston 512 that seals against the inner surface 514 of the upper tube 204. When the seat post 112 expands or contracts, the inner surface 514 of the upper tube 204 may slide up and down along the piston 512. The piston assembly 510, particularly the piston 512, divides the chamber 502 of the upper tube 204 into a first chamber 516 (between the piston 512 and the upper seal head 504) and a second chamber 518 (between the piston 512 and the lower seal head 506). The first chamber 516 and the second chamber 518 may also be referred to as the upper chamber and the lower chamber, respectively, or as the positive chamber 516 and the negative chamber 518, respectively. The first chamber 516 is defined by the piston assembly 510, the upper seal head 504, and the upper tube 204. The second chamber 518 is defined by the piston assembly 510, the lower seal head 506, the upper tube 204, and the shaft 508. The volumes of the first chamber 516 and the second chamber 518 change as the upper tube 204 moves up and down relative to the piston assembly 510. The first chamber 516 and the second chamber 518 are filled with a fluid. In this example, the seat post 112 is based on a pneumatic platform. Thus, the first chamber 516 and the second chamber 518 may be filled with a pressurized gas, such as air or nitrogen. In other examples, the first chamber 516 and the second chamber 518 may be filled with another type of compressible gas. The piston assembly 510 controls the flow of fluid (e.g., pressurized gas) through the piston 512 between the first chamber 516 and the second chamber 518.

[0055] In Figure 5 and Figure 6In the example shown, the seat post 112 includes a valve 520 and a motor 522 for controlling the state of the valve 520. In this example, the valve 520 and the motor 522 are part of the piston assembly 510 and are incorporated into and / or integrated with the piston 512. Thus, the valve 520 and the motor 522 are disposed in the upper tube 204 and at least partially in the overlapping region (e.g., L1 or L2) between the upper tube 204 and the lower tube 202. In this example, the valve 520 is a poppet valve that includes a poppet that can move in a linear direction to open or close the valve 520. However, in other examples, other types of valves may be used. The valve 520 can be operated (e.g., opened or closed) to control the flow of gas across the piston 512 between the first chamber 516 and the second chamber 518. In particular, the valve 520 can be operated between a closed state and an open state. In the closed state, fluid (e.g., pressurized gas) is blocked from flowing across the piston 512 between the first chamber 516 and the second chamber 518, which holds the lower tube 202 and the upper tube 204 in their current positions. In the open state, fluid can flow across the piston 512 between the first chamber 516 and the second chamber 518, which enables the upper tube 204 to move relative to the lower tube 202 to adjust the height of the seat 110( Figure 1 ). Although in this example, the valve 520 is operated by the motor 522, in other examples, the seat post 112 can include a solenoid or other type of actuator to control the valve 520. Additionally, although in this example the motor 522 is integrated into the piston assembly 510 in the upper tube 204, in other examples, the motor 522 can be disposed in another location. For example, the motor 522 can be coupled to the lower end 210 of the lower tube 202.

[0056] In some examples, the upper seal head 504 includes and / or is otherwise implemented as a valve 523 that enables a user to add pneumatic fluid to or remove pneumatic fluid from the chamber 502 in the upper tube 204. In this example, the valve 523 is implemented as a Schrader valve. However, in other examples, the valve 523 can be implemented as another type of valve, such as a Presta valve. The user can remove the seat clamp 214 and access the valve 523 to add or remove pneumatic fluid to / from the chamber 502. In some examples, the valve 523 can be located on one side of the upper tube 204 near the upper end 212.

[0057] In Figure 5 and Figure 6In the illustrated example, the first chamber 516 is a positive pressure chamber and the second chamber 518 is a negative pressure chamber. The first chamber 516 and the second chamber 518 are pressure-sealed chambers. The lower tube 202 defines a third chamber 526 between the lower seal head 506 and the lower cover assembly 220. The third chamber 526 is considered a pressure control chamber. The volume of the third chamber 526 changes based on the actuation position. In some examples, the third chamber 526 vents to the atmosphere and thus contains air at atmospheric pressure. However, in other examples, the third chamber 526 is also a pressure-sealed chamber (e.g., containing pressurized air or nitrogen). In such examples, when the upper tube 204 moves downward, the fluid (e.g., air) in the third chamber 526 can be compressed. This compressed fluid can provide a biasing force to return the seat post 112 to the fully extended position. In other examples, the third chamber 526 can have other mechanisms for compensating for volume changes, such as a floating piston or a deformable bladder. The first chamber 516, the second chamber 518, and the third chamber 526 can be any number of shapes and / or sizes. For example, the first chamber 516, the second chamber 518, and the third chamber 526 can be cylindrical (e.g., having outer diameters between 27 millimeters (mm) and 35 mm, respectively) and can be sized for a particular maximum seat post adjustment (e.g., 150 mm).

[0058] As Figure 5 and Figure 6 shown, the piston 512 has a first side 528 (e.g., a top side) facing the upper seal head 504 and a second side 530 (e.g., a bottom side) opposite the first side 528 and facing the lower seal head 506. The axial surface area of the first side 528 of the piston 512 (when viewed along the axis 206) is greater than the axial surface area of the second side 530 of the piston 512. This is because a portion of the axial surface area of the second side 530 reduces the cross-sectional area of the shaft 508. When the valve 520 is in the closed state and the seat post 112 is in the fully extended position ( Figure 5 ), the first chamber 516 acts as a spring and is configured to bias the upper tube 204 toward the fully extended position of the seat post 112. The dimensions and shapes of the first side 528 and the second side 530 of the piston 512 are set such that when the seat post 112 is in the fully extended position, the first chamber 516 and the second chamber 518 are pressurized such that the gas within the first chamber 516 supports the weight of the rider. In some examples, when the seat post 112 is in the fully extended position, due to the weight of the rider on the seat 110, the seat 110 ( Figure 1 ) sags less than 10 mm. Because the relationship between the axial surface area of the first side 528 of the piston 512 and the pneumatic pressure ratio between the first chamber 516 and the second chamber 518 holds the rider based on force calculations, the seat post 112 operates. This also depends on the volume of the second chamber 518 at the fully extended position of the seat post 112. InFigure 5 In the illustrated example, when the seat post 112 is in the fully extended position, the volume of the first chamber 516 is greater than the volume of the second chamber 518. In some examples, when the seat post 112 is in the fully extended position, the volume of the second chamber 518 may not exceed twenty percent of the volume of the first chamber 516. In other examples, the first chamber 516 and the second chamber 518 may have different volume ratios in the fully extended position. For example, when the seat post 112 is in the fully extended position, the volume of the second chamber 518 may not exceed ten percent, five percent, or three percent of the volume of the first chamber 516. This causes the seat post 112 to act as a zero negative pressure preloaded pneumatic spring. This is the principle of keeping the rider feeling that the rider experience is rigid. At the fully extended position of the seat post 112, the seat 110 can move slightly, but this movement is generally imperceptible to the rider.

[0059] As an exemplary operation, assume that the seat post 112 is in Figure 5 the fully extended position shown, and the rider desires to lower the seat 110 ( Figure 1 ). The rider presses the seat post actuation button 113 ( Figure 1 ) on the handlebar 118 ( Figure 1 ), and the control module 222 activates the motor 522 to open the valve 520. When the valve 520 is opened, a force can be applied downward on the seat 110 to compress the seat post 112. For example, the rider can sit (or partially sit) on the seat 110 to apply a downward pressure using his / her hips. This downward pressure forces fluid (e.g., pressurized gas) from the first chamber 516 through the valve 520 and through the piston 512 into the second chamber 518. This causes the upper tube 204 to move downward and into the lower tube 202, thereby lowering the seat 110. As the upper tube 204 moves downward, the volume of the first chamber 516 decreases and the volume of the second chamber 518 increases. The rider can move (e.g., lower) the seat 110 to any position between the fully extended position and the fully retracted position. Figure 6 The seat post 112 is shown in an intermediate position between the fully extended position and the fully retracted position.

[0060] When the seat 110 is in the desired position (such as Figure 6 the position in), the rider can release the seat post actuation button 113 ( Figure 1)。The control module 222 activates the motor 522 to close the valve 520. When the valve 520 is closed, it prevents fluid (e.g., pressurized gas) from flowing between the first chamber 516 and the second chamber 518 through the piston assembly 510. This restricts or prevents further relative movement of the upper tube 204 with respect to the lower tube 202. When the valve 520 is closed, the balance of forces in the system is such that the axial pressure acting on the first side 528 of the piston 512 is approximately equal to the axial pressure acting on the second side 530 of the piston 512. When a downward force is applied to the upper tube 204, the use of a compressible fluid such as air enables the pressure chamber to act as a compression spring. Thus, when a rider sits on the seat 110, the seat post 112 can support the rider's weight. In some examples, when the seat post 112 is in an intermediate position (between the fully extended position and the fully retracted position), due to the rider's weight, the seat 110 can sag slightly (e.g., 40 mm or less). The seat post 112 can be held in any position between the fully extended position and the fully retracted position. If the seat post 112 moves to the fully retracted position, the seat clamp 214 contacts the upper end 208 of the lower tube 202 and / or the lower seal head 506 contacts the lower cover assembly 220. This provides a hard stop to prevent further movement. When the seat post 112 is in the fully retracted position, the seat 110 does not sag due to this hard stop.

[0061] When it is desired to raise the seat post 112 back to the fully extended position, the rider presses the seat post actuation button 113( Figure 1 ), and the control module 222 activates the motor 522 to open the valve 520. In the absence of an external downward force acting on the seat 110( Figure 1 ), the pressure in the first chamber 516 of the upper tube 204 causes the upper tube 204 to move upward relative to the lower tube 202 back to the fully extended position. This is because the axial surface area of the first side 528 of the piston 512 is larger than the axial surface area of the second side 530 of the piston 512. Thus, the force exerted by the pressure in the first chamber 516 on the first side 528 of the piston 512 is greater than the force exerted by the pressure in the second chamber 518 on the second side 530 of the piston 512. As a result, the upper tube 204 is forced upward to the fully extended position. As the upper tube 204 moves upward, fluid flows from the second chamber 518 through the valve 520 to the first chamber 516. Thus, the axial pressure imbalance biases the seat post 112 toward the fully extended position. This enables the seat post 112 to automatically expand / extend back to Figure 5The fully extended position shown. In particular, the upper tube 204 is moved upward relative to the lower tube 202 until the top of the lower seal head 506 engages the second side 530 of the piston 512. This forms a stop or limit that defines the fully extended (apex) position. When the seat post 112 is in the fully extended position, the rider can release the seat post actuation button 113, which activates the motor 522 to close the valve, thereby holding the seat post 112 in the fully extended position. Thus, the pressurized gas in the first chamber 516 biases the upper tube 204 and the lower tube 202 away from each other, and the pressurized gas in the second chamber 518 biases the upper tube 204 and the lower tube 202 toward each other.

[0062] As described above, in some examples, the third chamber 526 leads to the atmosphere. In this way, the third chamber 526 provides a minimal (if any) biasing force on the upper tube 204. However, in other examples, the third chamber 526 can be sealed and pressurized with positive pressure. In such examples, when the upper tube 204 moves downward, the volume of the third chamber 526 decreases, which increases the pressure in the third chamber 526. This pressure acts upward on the lower seal head 506 to help bias the upper tube 204 to the fully extended position.

[0063] As described above, the control module 222 includes processor circuitry 408( Figure 4 ), which is configured to control and operate the motor 522 to open and close the valve 520. In Figure 5 and Figure 6 the example shown, the control module 222 is located on the outer surface 223 of the lower tube 202 at or near the upper end 208 of the lower tube 202, while the motor 522 is located in the piston assembly 510 in the chamber 502 of the upper tube 204. The seat post 112 can include one or more wires and / or electrical connectors to form an electrical path between the control module 222 and the motor 522. This enables power and / or command signals to be transmitted between the control module 222 and the motor 522. For example, as Figure 5 and Figure 6 shown, the seat post 112 includes a first wire 532 and a second wire 534 disposed in the lower tube 202. In some examples, the first outer tube wire 532 and the second outer tube wire 534 are positive and negative wires. The first outer tube wire 532 and the second outer tube wire 534 are electrically coupled to the control module 222. The first outer tube wire 532 and the second outer tube wire 534 extend through the lower tube 202 to the lower cover assembly 220. In other words, in this example, the first outer tube wire 532 and the second outer tube wire 534 extend between the upper end 208 and the lower end 210 of the lower tube 202. In some examples, the first outer tube wire 532 and the second outer tube wire 534 are disposed along the inner surface 536 of the lower tube 202 (e.g., in one or more channels disposed along the inner surface 536).

[0064] In the illustrated example, the seat post 112 further includes a first inner tube wire 538 and a second inner tube wire 540. The first inner tube wire 538 and the second inner tube wire 540 are disposed within the shaft 508 and extend between the lower cover assembly 220 and the motor 522. The lower cover assembly 220 includes one or more electrical connectors or wire bridging members to electrically couple the outer tube wires 532, 534 and the corresponding inner tube wires 538, 540. The outer tube wires 532, 534 and the inner tube wires 538, 540 may be soldered or crimped to the electrical connectors within the lower cover assembly 220. Thus, the outer tube wires 532, 534, the inner tube wires 538, 540 and the electrical connectors form an electrical path between the control module 222 and the motor 522. Accordingly, a positive electrical connection and a negative electrical connection are formed between the control module 222 and the motor 522. The control module 222 may apply electrical power through this electrical connection to activate the motor 522. Although in this example, the state of the seat post 200 is electronically changed by the control module 222, in other examples, the seat post 200 may be configured to change state through a hydraulic line or a mechanical cable or linkage.

[0065] Figure 7 is Figure 5 an enlarged view of the marked portion 542. As Figure 7 shown, the lower seal head 506 is threadedly coupled to the lower end 500 of the upper tube 204, which seals the lower end 500 of the upper tube 204. The seat post 112 includes a lower bushing 700 within a groove in the lower seal head 506, and the lower bushing 700 is slidably engaged with the inner surface 536 of the lower tube 202. When the upper tube 204 telescopes relative to the lower tube 202, the upper tube 204 is radially supported by the lower bushing 700. A static seal 702 (e.g., an O-ring) is disposed within a groove in the lower seal head 506, which forms a seal between the lower seal head 506 and the inner surface 514 of the upper tube 204.

[0066] The lower seal head 506 has a first end 704, a second end 706 opposite the first end 704, and a passage 708 extending through the lower seal head 506 between the first end 704 and the second end 706. The first end 704 faces and / or is exposed to the fluid within the second chamber 518, and the second end 706 faces and / or is exposed to the fluid within the third chamber 526. The shaft 508 extends through the passage 708. The lower seal head 506 has a first hole 710 extending into the first end 704 and a second hole 712 extending into the second end 706, which form a part of the passage 708. In the illustrated example, the seat post 112 includes a shaft seal 714 disposed within the second hole 712. The shaft seal 714 forms a pressure-tight seal between the lower seal head 506 and the shaft 508 to prevent fluid leakage through the lower seal head 506. When the seat post 112 expands and contracts, the shaft seal 714 also enables the lower seal head 506 to slide smoothly up and down along the shaft 508.

[0067] In the illustrated example, the seat post 112 includes a bumper 716 (which may be referred to as a crown bumper) coupled to the lower seal head 506. When the seat post 112 is in the fully extended position, as Figure 7 shown, the second side 530 of the piston 512 engages or contacts the bumper 716. The bumper 716 reduces the impact load applied to the seat post 112 due to crown actuation. In some examples, the bumper 716 is constructed of a compliant or elastic material such as rubber. For example, the bumper 716 may be constructed of a softer or harder rubber in the range of 40A to 90A on the Shore A scale, but may be harder or softer in other examples. As another example, the bumper 716 may be constructed of a viscoelastic material such as polyurethane or buna-nitrile. In the illustrated example, the bumper 716 is disposed within the first bore 710 and along the shoulder 718 of the first bore 710. In the illustrated example, the bumper 716 is disposed within a gland or recess to hold the bumper 716 in place. Additionally or alternatively, the bumper 716 may be coupled to the lower seal head 506 via other techniques such as threaded fasteners, adhesives, friction fits.

[0068] The piston assembly 510 includes a piston 512. The piston 512 may also be referred to as a valve body. In the illustrated example, the piston 512 includes an upper body portion 720, an intermediate body portion 724, and a lower body portion 722 that are coupled together. For example, in Figure 7 one example, the upper body portion 720 and the lower body portion 722 are threadably coupled to the intermediate body portion 724. However, in other examples, the piston 512 may be constructed of more or fewer body portions (e.g., one body portion). In the illustrated example, the lower body portion 722 is threadably coupled to the shaft 508. In other examples, the piston 512 may be coupled to the shaft 508 via other attachment techniques such as welding, fasteners, etc. In some examples, the piston 512 is constructed of metal and / or plastic polymers.

[0069] The piston 512 has a head 725 that seals against the inner surface 514 of the upper tube 204. Specifically, in this example, the piston assembly 510 includes a seal 726 (e.g., an O-ring) around the head 725 to seal against the inner surface 514 of the upper tube 204, and the seal 726 may be referred to as a chamber seal or piston seal. Thus, the piston 512 with the seal 726 divides the chamber 502 of the upper tube 204 into a first chamber 516 (formed above the head 725) and a second chamber 518 (formed below the head 725).

[0070] In the illustrated example, piston 512 defines a fluid passageway 728 that extends between a first side 528 of piston 512 and a side surface 730 of piston 512. Thus, fluid passageway 728 fluidly connects first chamber 516 and second chamber 518. A portion of fluid passageway 728 forms a sealing surface or seat 732. In the illustrated example, piston assembly 510 includes a flow control member 734 (e.g., a lift, a plug). Flow control member 734 is slidably disposed within fluid passageway 728. In this example, flow control member 734 is movable in a linear direction between a closed position and an open position. In Figure 7 the illustrated closed position, flow control member 734 engages seat 732 and prevents fluid flow through fluid passageway 728. Thus, fluid flow between first chamber 516 and second chamber 518 through piston 512 is prevented. In the open position, flow control member 734 is spaced apart from seat 732 and thus permits fluid flow through passageway 728 and through piston 512 between first chamber 516 and second chamber 518. Fluid passageway 728 and flow control member 734 form valve 520. Thus, valve 520 is disposed within piston 512 and / or is at least partially formed by piston 512. Valve 520 is operable between a closed state that prevents fluid flow through piston 512 and an open state that permits fluid flow through piston 512.

[0071] In the illustrated example, motor 522 is disposed within lower body portion 722 of piston 512. As Figure 7 illustrated, inner tube wires 538, 540 extend through shaft 508 and into lower body portion 722 of piston 512 and are electrically connected to motor 522. When activated, motor 522 moves flow control member 734 between a closed position and an open position. In the illustrated example, piston assembly 510 includes a gear system 736 within piston 512, and gear system 736 is operatively coupled between motor 522 and flow control member 734. Gear system 736 transfers power and / or motion from motor 522 to flow control member 734. In some examples, gear system 736 includes one or more gear arrangements (e.g., a planetary gear system) to provide a speed reduction between an output shaft and flow control member 734. In some examples, motor 522 has a rotatable output shaft, while flow control member 734 is movable in a linear direction. Thus, gear system 736 is used to convert the rotational motion of the output shaft into the linear motion of flow control member 734. In other examples, valve 520 may be configured as a rotary valve. In such an example, flow control member 734 will rotate between a closed position and an open position. In other examples, motor 522 may be implemented as a linear type motor or solenoid having a linearly movable output shaft.

[0072] As Figure 7As shown, the second side 530 of the piston 512 has a shoulder 738 and an extension 740 extending downward from the shoulder 738. When the seat post 112 is in the fully extended position, the extension 740 extends into the first hole 710 of the lower seal head 506 and engages the buffer 716. In this position, the shoulder 738 is spaced apart from the first end 704 of the lower seal head 506. Thus, in this position, the second chamber 518 is formed by the space below the seal 726 and between the outer surface 730 of the piston 512 and the inner surface 514 of the upper tube 204, and the space below the shoulder 738 and between the extension 740 and the inner surface of the hole 710. It is desirable for the second chamber 518 to be relatively small when in the fully extended position to reduce its compressibility or squishiness. This gives the rider a firm fixed saddle height for better (e.g., maximum) pedaling efficiency.

[0073] In some cases, when in the fully extended position, the seat post 112 may be too high for some riders. For example, the maximum seat post that can be inserted into a bicycle frame is limited by a seat post collar or internal bicycle frame features. Even when the seat post is fully inserted into the bicycle frame (against the collar of the frame), the position of the upper tube 204 may still place the saddle too high for some riders to pedal the bicycle correctly.

[0074] Figure 8 An example of a seat post 112 including an exemplary spacer 800 is shown. Figure 8 The seat post 112 in is shown in the fully extended position. The spacer 800 is used to reduce the height or length of the seat post 112 in the fully extended position. This is advantageous for shorter riders who desire a lower apex height. In the example shown, the spacer 800 is disposed in the second chamber 518. Specifically, the spacer 800 is disposed in the upper tube 204 between the piston assembly 510 and the lower seal head 506. Thus, when the seat post 112 is in the fully extended position, the spacer 800 separates the piston assembly 510 and the lower seal head 506 by a certain distance. In the fully extended position, the amount by which the upper tube 204 extends outward (e.g., upward) from the lower tube 202 is the third length L3. In Figure 8 the fully extended position (with the spacer 800), the third length L3 of the seat post 112 is less than the first length L1 of the seat post 112 in Figure 5 the fully extended position (without the spacer 800). Thus, with the spacer 800, in the fully extended position, the overall height or length of the seat post 112 is less than the case without the spacer 800. Thus, the apex height of the seat post 112 has been reduced or lowered.

[0075] Figure 9 is Figure 8An enlarged view of the labeled portion 802 shows the spacer 800 in the second chamber 518 between the piston 512 and the lower seal head 506. In the example shown, the spacer 800 engages the buffer 716. In some examples, the spacer 800 remains in the lower portion of the second chamber 518 and engages the buffer 716 as the seat post 112 expands and contracts. When the seat post 112 expands, the piston 512 engages the spacer 800, which defines the fully extended (apex) position. The spacer 800 consumes at least a portion of the space in the second chamber 518, thereby preventing the piston 512 from moving further toward the lower seal head 506.

[0076] In the example shown, the spacer 800 has a first end 900, a second end 902 opposite the first end 900, an outer surface 904 between the first end 900 and the second end 902, and a central passage 906 extending through the spacer 800 between the first end 900 and the second end 902. The shaft 508 extends through the central passage 906 of the spacer 800. The shaft 508 can slide along the inner surface of the central passage 906 as the seat post 112 expands and contracts. In the example shown, the second end 902 of the spacer 800 engages the buffer 716. In other examples, the buffer 716 can be omitted and the second end 902 of the spacer 800 can engage the lower seal head 506 directly.

[0077] As Figure 9 shown, the outer surface 904 of the spacer 800 has or forms a shoulder 908. The spacer 800 has a first portion 910 having a first outer diameter between the first end 900 and the shoulder 908 and a second portion 912 having a second outer diameter between the shoulder 908 and the second end 902, where the second outer diameter / diameter is less than the first outer diameter / diameter (marked in Figure 14 ). The spacer 800 has a hole 914 extending into and / or otherwise formed in the first end 900 of the spacer 800, and the hole 914 forms part of the central passage 906. The hole 914 has a bottom surface 916.

[0078] Briefly referring to Figures 12 to 15 , Figure 12 is a perspective view of the spacer 800, Figure 13 is a top view of the first end 900 of the spacer 800, Figure 14 is a side view of the spacer 800, and Figure 15 is a cross-sectional view taken along line A-A of Figure 14 . As Figure 14As shown, the first portion 910 has a first outer diameter D1, and the second portion 912 has a second outer diameter D2 that is less than the first outer diameter D1. Additionally, the first portion 910 has a first length X1, and the second portion 912 has a second length X2. In this example, the second length X2 is less than the first length X1, but in other examples it may be the same as or greater than the first length X1. As Figure 15 shown, the third length X3 is defined by the distance between the bottom surface 916 of the hole 914 and the second end 902 of the spacer 800. The third length X3 corresponds to the difference between L1 and L3. Thus, the third length X3 corresponds to the height or length by which the seat post 112 is reduced by the spacer 800 in the fully extended position.

[0079] Return to reference Figure 9 , the spacer 800 is positioned within the upper tube 204 such that the first portion 910 is above the first end 704 of the lower seal head 506, and the second portion 912 extends into a first hole 710 in the first end 704 of the lower seal head 506. The first outer diameter D1 of the first portion 910 ( Figure 14 ) substantially fills the inner diameter of the upper tube 204. In some examples, the first outer diameter D1 ( Figure 14 ) is sized to form an interference fit (sometimes referred to as a slip fit or push fit) between the outer surface 904 of the first portion 910 of the spacer 800 and the inner surface 514 of the upper tube 204. Thus, the first outer diameter D1 can be substantially the same as the inner diameter of the upper tube 204. In other examples, the first outer diameter D1 ( Figure 14 ) can be sized to form a clearance fit between the outer surface 904 of the first portion 910 of the spacer 800 and the inner surface 514 of the upper tube 204. In some examples, the first outer diameter D1 can be from 15 mm to 40 mm, and the diametral clearance between the outer surface 904 of the first portion 910 and the inner surface 514 of the upper tube 204 can be from 0 mm to 1 mm. In other examples, the first outer diameter D1 can be greater than or less than the ranges disclosed above and / or the diametral clearance can be greater than 1 mm.

[0080] As Figure 9 shown, the second portion 912 of the spacer 800 extends into the first hole 710 of the lower seal head 506 and engages the buffer 716. The second outer diameter D2 ( Figure 14 ) and the second length X2 ( Figure 14 ) enable the second portion 912 to be inserted and substantially fill the first hole 710 of the lower seal head 506. In some examples, the second portion 912 forms a slip fit or clearance fit within the lower seal head 506. In the example shown, the second length X2 ( Figure 14) is sized such that the shoulder 908 of the spacer 800 remains spaced apart from or non - engaged with the first end 704 of the lower seal head 506. However, in other examples, the second length X2 can be shortened such that the shoulder 908 of the spacer 800 engages the first end 704 of the lower seal head 506. In the example shown, the transition or corner 918 between the shoulder 908 and the second portion 912 is chamfered or tapered, and the lower seal head 506 has a chamfered or tapered edge 920 at the opening of the first hole 710 in the first end 704. In some examples, these surfaces engage each other to form a tight interface between the spacer 800 and the lower seal head 506.

[0081] As Figure 9 shown, the hole 914 of the spacer 800 is sized to accommodate the extension 740 of the piston 512. When the seat post 112 is in the fully extended position, the extension 740 extends into the hole 914, and the bottom 922 of the extension 740 engages the bottom surface 916 in the hole 914 of the spacer 800. In some examples, the piston 512 has a chamfered or tapered corner 924 between the shoulder 738 and the extension 740, and the spacer 800 has a chamfered or tapered edge 926 at the opening of the hole 914 on the first end 900 of the spacer 800. In some examples, when the piston 512 engages the spacer 800, the tapered corner 924 engages the tapered edge 926. However, in other examples, these tapered surfaces may not contact each other. As described above, the third length X3 between the bottom surface 916 of the hole 914 and the second end 902 of the spacer 800 ( Figure 15 ) defines the amount of vertical travel consumed by the spacer 800 (e.g., reduced apex height). This distance X3 is equal to Figure 5 and Figure 8 the difference between L1 and L3 as shown in. The spacer 800 can be sized to have any desired distance X3. The distance X3 can be set by the manufacturer. In some examples, the spacer 800 is sized such that the distance X3 is in the range of 10 mm to 25 mm. In other examples, the third length X3 can be in the range of 1 mm to 100 mm.

[0082] In Figure 9In the fully extended position shown, the fluid (e.g., pneumatic gas) in the second chamber 518 fills the space below the seal 726 and between the outer surface 730 of the piston 512 and the inner surface 514 of the upper tube 204, as well as the space between the shoulder 738 of the piston 512 and the first end 900 of the spacer 800. In some examples, the space between the shoulder 738 of the piston 512 and the first end 900 of the spacer 800 ensures that the piston 512 does not get stuck on the first end 900 of the spacer 800. In some examples, the outer surface 904 of the first portion 910 of the spacer 800 is in tight contact with the inner surface 514 of the upper tube 204. In this way, the volume of the second chamber 518 is formed only by the space above the spacer 800. However, in other examples, the interface between the spacer 800 and the inner surface 514 can be relatively loose, such that fluid can fill the diametrical gap between the spacer 800 and the upper tube 204. In some examples, the spacer 800 can have one or more chamfers, bevels, radii, and / or profiles to minimize the negative volume fluid space. As described above, it is generally desirable to keep the volume of the second chamber 518 relatively small in the fully extended position to reduce or limit the movement of the upper tube 204.

[0083] Figure 10 A seat post 112 with a spacer 800 is shown in a partially retracted position. Figure 11 is Figure 10 an enlarged view of the labeled portion 1000 of. As described above, in some examples, the spacer 800 remains in the bottom portion of the second chamber 518 and engages the buffer 716. In some examples, the spacer 800 remains in this position due to gravity. In other words, the spacer 800 can move freely (e.g., slide) within the upper tube 804 but remains in the bottom portion due to gravity. Additionally, in some examples, the spacer 800 can be held in this position frictionally and / or mechanically. For example, the size of the spacer 800 can be set to form an interference fit (sometimes referred to as a friction fit) with the lower seal head 506 and / or the upper tube 204, which holds the spacer 800 in the Figure 11 position shown. In addition to or alternatively, the spacer 800 can be held in this position by a mechanical coupling (such as via an O-ring, tolerance ring, snap ring, threaded engagement, threaded fastener, and / or magnet). In some examples, the seat post 112 can include a spring to bias the spacer 800 into the lower seal head 506.

[0084] In some examples, the spacer 800 is formed via an injection molding process. In other examples, the spacer 800 can be formed using other manufacturing processes (such as additive manufacturing (e.g., 3D printing), machining, etc.). In some examples, the spacer 800 is made of a material such as acetal (e.g., ) or a polymer such as polyamide. In other examples, the spacer 800 can be made of other materials, such as polymers or metals. The spacer material can be rigid, elastic, or easily deformable. In some examples, the spacer 800 can have surface features, such as molded, laser marked, pad printed text and / or pictures, etc., to describe its dimensions, part identification, and / or installation orientation or instructions.

[0085] The spacer 800 can be configured to any length to achieve the desired apex height. For example, the dimensions of the spacer 800 can be set such that the length X3 is 10 mm, 20 mm, 30 mm, etc. In some examples, the seat post 112 can be sold as a device, kit, or component with multiple spacers of different sizes. Then, the user can select the desired spacer to achieve the desired apex height.

[0086] In some examples, the seat post 112 can include a plurality of spacers arranged in a stack. For example, Figure 16 Two exemplary spacers are shown, including a first spacer 800a and a second spacer 800b. The part numbers of the spacers 800a, 800b are the same as those described above in connection with Figures 8 to 15 but with corresponding "a" or "b". The second spacer 800b can be added to further reduce the length of the seat post 112 in the fully extended position. Figure 17 is a side view of two spacers 800a, 800b in a stacked arrangement or configuration. Figure 18 is a cross-sectional view taken along line B-B of Figure 17 As Figure 18 shown, the first spacer 800a and the second spacer 800b are stacked such that the second portion 910b of the second spacer 800b extends into the hole 914a of the first spacer 800a and engages the bottom surface 916a of the hole 914a. In this way, the first spacer 800a and the second spacer 800b are nested. In some examples, the first spacer 800a and the second spacer 800b are held in this nested position by gravity, but can also be held together frictionally or mechanically (e.g., via O-rings, tolerance rings, snap rings, threaded engagement, threaded fasteners, magnets) and / or include a spring to bias the stack towards the lower seal head 506. In some examples, the seat post 112 can include a spring to bias the spacer 800 into the lower seal head 506. The first spacer 800a and the second spacer 800b can be installed in the second chamber 518 and in Figure 16 and Figure 17The axial configuration stack shown. In this example, a fourth height X4 is defined between the bottom surface 916b of the second spacer 800b (top spacer) and the second end 902a of the first spacer 800a (bottom spacer). The fourth height X4 corresponds to the reduced apex height of the seat post 112. In some examples, one or more additional spacers may be stacked on top of the second spacer 800b. In some instances, the first spacer 800a and the second spacer 800b (and / or any additional spacers) have the same dimensions and shape. In such an example, the fourth length X4 corresponds to twice the third length X3( Figure 15 ). The user can arrange more than two of the spacers together to achieve the desired apex height. For example, each spacer may have a third length X3 of 10 mm( Figure 15 ). If it is desired to reduce the apex height by 40 mm, the user can stack four spacers together. In other examples, the first spacer 800a and the second spacer 800b (and / or additional spacers) may have different dimensions and shapes. In some examples, one or more spacers may be pre-installed in the seat post 112. In other examples, the seat post 112 (without the spacers installed) may be sold as a device, kit, or component with one or more spacers, and / or the spacers may be sold separately from the seat post 112. The user or rider can disassemble the seat post 112 and install one or more spacers to achieve the desired apex height.

[0087] Figure 19 is a partial exploded view of the seat post 112 having one spacer 800, and Figure 8 and Figure 20 is Figure 19 an enlarged view of the labeled portion 1900. An exemplary method or process for installing or assembling the spacer 800 in the seat post 112 is described in conjunction with Figure 19 and Figure 20 . First, the valve 520( Figure 5 ) is switched to the open state, and the valve 523( Figure 5 ) is used to evacuate the first chamber 516 and the second chamber 518( Figure 5)Reduce or remove the fluid. Next, remove the collar 400 by disconnecting the first part 406a and the second part 406b (such as by removing one or more threaded fasteners (e.g., screws, bolts)). Next, remove the lower cover assembly 220 from the lower tube 202 by removing the snap ring 1902 and pushing the upper tube 204 and the shaft 508 further into the lower tube 202. Next, remove the fasteners from the lower cover assembly 220 to separate it from the shaft 508. Then, pull the upper tube 204 out of the lower tube 202, exposing the lower seal head 506. The shown lower seal head 506 is screwed into the upper tube 204 through a hex external interface. Unscrew the lower seal head 506 from the lower end 500 of the upper tube 204. In some examples, the upper tube 204 may have its own internal wrench interface or external wrench interface around the Schrader valve to counteract the unscrewing action of the lower seal head 506. Remove the lower seal head 506 from the shaft 508. Next, slide the spacer 800 or a plurality of spacers (e.g., Figure 16 the first spacer 800a and the second spacer 800b) onto the shaft 508, with the first outer diameter D1 ( Figure 14 ) in the front. Then reverse all steps to reassemble the seat post 112. The seat post 112 now has a reduced vertex height of dimension X3 ( Figure 15 ) or X4 ( Figure 18 ).

[0088] In addition to or as an alternative to the spacer 800 installed in the second chamber 518, the seat post 112 may include one or more spacers at other locations. For example, Figure 21 an example of a seat post 112 including a spacer 2100 in the third chamber 526 in the lower tube 202 is shown. In this example, the spacer 2100 reduces the amount by which the seat post 112 can contract. In the shown example, the spacer 2100 is disposed on the shaft 508, between the lower seal head 506 and the lower cover assembly 220. When the seat post 112 contracts or compresses, the upper tube 204 with the lower seal head 506 moves downward and eventually engages the spacer 2100, which defines or forms the fully contracted (bottom point) position. The spacer 2100 limits or reduces the travel amount. In some examples, the spacer 2100 is held at the bottom of the third chamber 526 and engages the lower cover assembly 220. The spacer 2100 may be a disk-shaped with a central opening to receive the shaft 508. The spacer 2100 may be made of any of the same materials disclosed herein in connection with the spacer 800. The spacer 2100 may be used in conjunction with one or more spacers 800, or may be used independently of the spacer 800.

[0089] Figure 22Another example is shown, in which the seat post 112 includes a spacer 2200 in a first chamber 516 in the upper tube 204 between the piston assembly 510 and the upper seal head 504. When the seat post 112 contracts or compresses, the upper tube 204 with the upper seal head 504 moves downward, and eventually the spacer 2200 engages the top of the piston assembly 510, which defines or forms the fully contracted (bottom dead center) position. The spacer 2200 limits or reduces the amount of travel. The spacer 2200 can be disc-shaped. The spacer 2200 can be constructed of any of the same materials disclosed herein in connection with the spacer 800. The spacer 2200 can be used in conjunction with one or more of the spacer 800 and / or the spacer 2100, or can be used independently of the spacers 800, 2100.

[0090] Although the exemplary seat post is disclosed as having a pneumatic platform, the exemplary seat post can also be used in combination with a hydraulic platform. For example, instead of having a pneumatic chamber filled with pressurized gas, the chambers 516, 518 can be filled with a hydraulic fluid, such as oil. Thus, the examples disclosed herein can be used in combination with valves for compressible or incompressible fluids. Also, although the examples disclosed herein utilize a battery as a power source in the control module to activate the motor, in other examples, the motor can be activated from another power source (such as an e-bike battery) or from another battery attached to the bicycle.

[0091] The exemplary spacers disclosed herein can also be used in other types of bicycle components. For example, any of the exemplary spacers can be used in suspension components (e.g., shock absorbers, front forks). Suspension components typically include a first tube and a second tube arranged in a telescoping arrangement. The exemplary spacers disclosed herein can be similarly inserted into a chamber in the first tube or the second tube and used to reduce the height of the top dead center position and / or reduce the bottom dead center stroke length.

[0092] Exemplary systems, devices, methods, and articles for bicycles (and / or other vehicles) are disclosed herein. Combinations of the examples and examples disclosed herein include the following:

[0093] Example 1 is a height-adjustable seat post for a bicycle. The height-adjustable seat post includes an upper tube configured to be coupled to a seat. The upper tube has an upper end and a lower end opposite the upper end. The height-adjustable seat post includes a lower tube configured to be coupled to a frame of the bicycle. The upper tube and the lower tube are configured in a telescoping arrangement and are movable between at least a first position and a second position. The height-adjustable seat post includes: an upper seal head coupled to the upper tube at or near the upper end; a lower seal head coupled to the upper tube at or near the lower end; a shaft coupled to the lower tube and extending through the lower seal head into the upper tube; and a piston within the upper tube, the piston being coupled to the shaft. The piston divides the upper tube into a first chamber between the piston and the upper seal head and a second chamber between the piston and the lower seal head. The height-adjustable seat post further includes a spacer within the second chamber between the piston and the lower seal head to reduce the length of the height-adjustable seat post in at least one of the first position and the second position.

[0094] Example 2 includes the height-adjustable seat post of Example 1, wherein the spacer has a first end, a second end opposite the first end, and an outer surface. The outer surface of the spacer has a shoulder. The spacer has a first portion between the first end and the shoulder having a first outer diameter and a second portion between the shoulder and the second end having a second outer diameter. The second outer diameter is less than the first outer diameter.

[0095] Example 3 includes the height-adjustable seat post of Example 2, wherein the lower seal head has a first end and a second end opposite the first end, the first end of the lower seal head facing the second chamber, and the lower seal head has a hole extending into the first end of the lower seal head.

[0096] Example 4 includes the height-adjustable seat post of Example 3, wherein the first portion of the spacer is disposed above the first end of the lower seal head, and the second portion of the spacer extends into the hole in the first end of the lower seal head.

[0097] Example 5 includes the height-adjustable seat post of Example 4, wherein the first outer diameter is sized to form an interference fit between the outer surface of the first portion of the spacer and the inner surface of the upper tube.

[0098] Example 6 includes the height-adjustable seat post of Example 4 or 5, the height-adjustable seat post further including a buffer disposed in the hole in the lower seal head. The second end of the spacer engages the buffer.

[0099] Example 7 includes the height-adjustable seat post of any one of Examples 1 to 6, wherein the spacer has a first end and a second end opposite the first end, the first end faces the second chamber, and wherein the spacer has a hole extending into the first end of the spacer.

[0100] Example 8 includes the height-adjustable seat post of Example 7, wherein the distance between the bottom surface of the hole and the second end of the spacer corresponds to the length of the height-adjustable seat post reduced by the spacer in the fully extended position.

[0101] Example 9 includes the height-adjustable seat post of Example 8, wherein the piston has a shoulder and an extension extending from the shoulder, and wherein when the height-adjustable seat post is in the fully extended position, the extension of the piston extends into the hole of the spacer and engages with the bottom surface of the hole.

[0102] Example 10 includes the height-adjustable seat post of Example 9, wherein when the height-adjustable seat post is in the fully extended position, the shoulder of the piston is spaced apart from the first end of the spacer.

[0103] Example 11 includes the height-adjustable seat post of any one of Examples 7 to 10, wherein the spacer has a tapered edge at the opening of the hole on the first end of the spacer.

[0104] Example 12 includes the height-adjustable seat post of any one of Examples 1 to 11, wherein the shaft extends through a central channel in the spacer, and wherein the shaft is slidable in the central channel in the spacer.

[0105] Example 13 includes the height-adjustable seat post of any one of Examples 1 to 12, wherein the spacer is a first spacer, and the height-adjustable seat post further includes a second spacer in the second chamber to further reduce the length of the height-adjustable seat post.

[0106] Example 14 includes the height-adjustable seat post of Example 13, wherein the first spacer and the second spacer are stacked axially in the second chamber.

[0107] Example 15 includes the height-adjustable seat post of Example 14, wherein the first spacer and the second spacer have the same size and shape.

[0108] Example 16 includes the height-adjustable seat post of any one of Examples 1 to 15, wherein the first position is the fully extended position and the second position is the fully retracted position.

[0109] Example 17 includes the height-adjustable seat post according to any one of Examples 1 to 16, wherein the upper seal head includes a valve.

[0110] Example 18 is a device for a bicycle. The device includes a height-adjustable seat post that includes an upper tube and a lower tube configured in a telescopic arrangement and movable between at least a first position and a second position. In the first position, the upper tube extends outwardly from the lower tube by a first length. The height-adjustable seat post includes: a lower seal head located in the upper tube at or near a lower end of the upper tube; a shaft coupled to the lower tube and extending through the lower seal head into the upper tube; and a piston in the upper tube, the piston being coupled to the shaft. The piston divides the upper tube into a first chamber and a second chamber. The second chamber is defined between the piston and the lower seal head. The device further includes a spacer having a first end, a second end, and a central passage extending between the first end and the second end. The spacer is sized to be installed in the second chamber of the height-adjustable seat post, wherein the shaft extends through the central passage, and wherein, when the spacer is installed in the second chamber of the height-adjustable seat post, in the first position, the upper tube extends outwardly from the lower tube by a second length, the second length being less than the first length.

[0111] Example 19 includes the device of Example 18, wherein the outer surface of the spacer has a shoulder. The spacer has a first portion between the first end and the shoulder having a first outer diameter and a second portion between the shoulder and the second end having a second outer diameter. The second outer diameter is less than the first outer diameter.

[0112] Example 20 includes the device of Example 19, wherein the lower seal head has a first end and a second end opposite the first end. The first end faces the second chamber. The spacer has a hole extending into the first end, and wherein the second portion of the spacer is sized to be inserted into the hole of the lower seal head.

[0113] Example 21 includes the device of Example 20, wherein the first outer diameter is sized to form an interference fit between the outer surface of the first portion of the spacer and the inner surface of the upper tube when the spacer is installed in the second chamber.

[0114] Example 22 includes the device according to any one of Examples 18 to 21, wherein the spacer is a first spacer. The device further includes a second spacer to be installed in the second chamber, wherein the first spacer and the second spacer have the same size and shape.

[0115] 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 be a complete description of all elements and features of the devices and systems that utilize the structures or methods described herein. Many other embodiments may be apparent to those skilled in the art upon reading this disclosure. Other embodiments may be utilized and other embodiments may be derived from this disclosure, such that structural and logical substitutions and changes may be made without departing from the scope of this disclosure. Additionally, the illustrations are merely representative and may not be drawn to scale. Some of the ratios in the illustrations may be exaggerated while others may be minimized. Accordingly, this disclosure and the figures should be regarded as illustrative rather than restrictive.

[0116] Although this specification contains many details, these details should not be construed as limitations on the scope of the invention or on 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 may also be implemented in combination in a single embodiment. Conversely, the various features that are described in the context of a single embodiment may also be implemented separately or in any suitable sub-combination in multiple embodiments. Moreover, although the features may be described above as acting in certain combinations and even initially claimed as such, in some cases, one or more features from a claimed combination may be excluded from the combination, and the claimed combination may cover a sub-combination or a variation of the sub-combination.

[0117] Although particular embodiments have been shown and described herein, it should be understood that any subsequent arrangement designed to achieve the same or similar purpose may replace the particular embodiments shown. This disclosure is intended to cover any and all subsequent modifications or variations of the various embodiments. Combinations of the above embodiments and other embodiments not specifically described herein will be apparent to those skilled in the art upon reading the specification.

[0118] The abstract of the present 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. Additionally, in the foregoing detailed description, for the purpose of simplifying the present disclosure, various features may be grouped together or described in a single embodiment. The present disclosure should not be construed as reflecting an intention that the claimed embodiments require more features than are expressly recited in each claim. Rather, as reflected in the following claims, the inventive subject matter may relate to less than all of the features of any of the disclosed embodiments. Accordingly, the following claims are incorporated into the detailed description, where each claim independently serves as a definition of a separately claimed subject matter.

[0119] It is intended that the foregoing detailed description be regarded as illustrative rather than limiting, and it should be understood that the appended claims, including all equivalents, are intended to define the scope of the invention. The claims should not be construed as limited to the described order or elements unless otherwise stated. Accordingly, all embodiments falling within the scope and spirit of the appended claims and their equivalents are claimed as the invention.

Claims

1. A height-adjustable seat post for a bicycle, the height-adjustable seat post comprising: a top tube to be coupled to the saddle, the top tube having an upper end and a lower end opposite the upper end; a down tube to be coupled to a frame of the bicycle, the upper tube and the down tube being configured in a telescopic arrangement and movable between at least a first position and a second position; an upper sealing head coupled to the upper tube at or near the upper end; a lower sealing head coupled to the upper tube at or near the lower end; a shaft coupled to the lower tube and extending through the lower sealing head into the upper tube; a piston in the upper tube, the piston coupled to the shaft, the piston dividing the upper tube into a first chamber between the piston and the upper sealing head and a second chamber between the piston and the lower sealing head; as well as A spacer is provided in the second chamber between the piston and the lower sealing head to reduce the length of the height adjustable seat post in at least one of the first position and the second position.

2. The height-adjustable seat post according to claim 1, wherein: The spacer has a first end, a second end opposite the first end, and an outer surface, wherein the outer surface of the spacer has a shoulder, the spacer has a first portion with a first outer diameter between the first end and the shoulder, and a second portion with a second outer diameter between the shoulder and the second end, the second outer diameter being smaller than the first outer diameter.

3. The height-adjustable seat post according to claim 2, wherein: The lower sealing head has a first end and a second end opposite to the first end, the first end of the lower sealing head faces the second chamber, and the lower sealing head has a hole extending into the first end of the lower sealing head.

4. The height-adjustable seat post according to claim 3, wherein: The first portion of the spacer is disposed above the first end of the lower seal head, and the second portion of the spacer extends into the bore of the first end of the lower seal head.

5. The height adjustable seat post according to claim 4, wherein: The first outer diameter is sized to form a transition fit between the outer surface of the first portion of the spacer and the inner surface of the upper tube.

6. The height adjustable seat post of claim 4, further comprising a bumper disposed in the aperture in the lower sealing head, the second end of the spacer engaging the bumper.

7. The height adjustable seat post of claim 1, wherein: The spacer has a first end and a second end opposite the first end, the first end facing the second chamber, and wherein the spacer has a hole extending into the first end of the spacer.

8. The height adjustable seat post according to claim 7, wherein: The distance between the bottom surface of the aperture and the second end of the spacer corresponds to the length of the height adjustable seatpost in the fully extended position as reduced by the spacer.

9. The height adjustable seat post according to claim 8, wherein: The piston has a shoulder and an extension extending from the shoulder, and wherein the extension of the piston extends into the bore of the spacer and engages the bottom surface of the bore when the height adjustable seatpost is in the fully extended position.

10. The height adjustable seat post according to claim 9, wherein: When the height adjustable seatpost is in the fully extended position, the shoulder of the piston is spaced apart from the first end of the spacer.

11. The height adjustable seat post according to claim 7, wherein: The spacer has a tapered edge at the opening of the hole on the first end of the spacer.

12. The height adjustable seat post of claim 1, wherein: The shaft extends through a central passage in the spacer, and wherein the shaft is slidable in the central passage in the spacer.

13. The height adjustable seat post of claim 1, wherein: The spacer is a first spacer and the height adjustable seat post further includes a second spacer in the second chamber to further reduce the length of the height adjustable seat post.

14. The height adjustable seat post of claim 13, wherein: The first spacer and the second spacer are stacked in an axial configuration in the second chamber.

15. The height adjustable seat post of claim 14, wherein: The first spacer and the second spacer have the same size and shape.

16. The height adjustable seat post of claim 1, wherein: The first position is a fully extended position and the second position is a fully retracted position.

17. The height adjustable seat post of claim 1, wherein: The upper sealing head includes a valve.

18. A device for a bicycle, the device comprising: A height-adjustable seat post, the height-adjustable seat post comprising: an upper tube and a lower tube configured in a telescoping arrangement and movable between at least a first position and a second position in which the upper tube extends outwardly from the lower tube by a first length; a lower sealing head located in the upper tube at or near a lower end of the upper tube; a shaft coupled to the lower tube and extending through the lower sealing head into the upper tube; and a piston in the upper tube, the piston coupled to the shaft, the piston dividing the upper tube into a first chamber and a second chamber, the second chamber being defined between the piston and the lower sealing head; and A spacer having a first end, a second end, and a central passage extending between the first end and the second end, the spacer being sized to be mounted in the second chamber of the height adjustable seat post, wherein the shaft extends through the central passage, and wherein, when the spacer is mounted in the second chamber of the height adjustable seat post, in the first position, the upper tube extends outwardly from the lower tube by a second length, the second length being less than the first length.

19. The apparatus according to claim 18, wherein: The outer surface of the spacer has a shoulder, the spacer has a first portion between the first end and the shoulder having a first outer diameter and a second portion between the shoulder and the second end having a second outer diameter, the second outer diameter being smaller than the first outer diameter.

20. The apparatus of claim 19, wherein: The lower sealing head has a first end and a second end opposite the first end, the first end facing the second chamber, the spacer has a hole extending into the first end, and wherein the second portion of the spacer is sized to be inserted into the hole of the lower sealing head.

21. The apparatus according to claim 20, wherein: The first outer diameter is sized to form a transition fit between the outer surface of the first portion of the spacer and the inner surface of the upper tube when the spacer is installed in the second chamber.

22. The apparatus of claim 18, wherein: The spacer is a first spacer, and the apparatus further comprises a second spacer to be installed in the second chamber, wherein the first spacer and the second spacer have the same size and shape.

Images