Bicycle suspension system with automatic venting

Abstract

An automatic ventilation and pressurization bicycle suspension system having a sealed chamber, which minimizes the pressure difference between the sealed chamber and the surrounding environment. A method for manufacturing and using the bicycle suspension system is also provided.

Description

Technical Field

[0001] This application generally relates to an automatic ventilation and pressurization bicycle suspension system having a sealed chamber that minimizes the pressure difference between the sealed chamber and the surrounding environment. Prior Technology

[0002] Vehicles such as bicycles and motorcycles typically include telescopic suspension systems, such as front suspension systems with telescopic tubes or tubular structural members. These suspension systems generally have spring and / or damper subsystems housed within or between one or more of these tube / tubular structural members. These spring and damper subsystems are generally "sealed" systems within the telescopic member, providing spring and damping rates to reduce forces on the vehicle and rider. These telescopic tubular structures may define sealed volumetric chambers surrounding these spring / damper subsystems. These sealed volumetric chambers seal lubricating oil within the chambers while preventing environmental contaminants from entering.

[0003] Even when the system is at rest, the sealed volumetric chamber can be subjected to a positive or negative pressure (i.e., a vacuum) relative to atmospheric pressure due to changes in altitude, atmospheric pressure, or temperature. This pressure difference, in addition to the predetermined spring / damping ratio of these subsystems, can generate significant compressive forces acting on these telescopic components. These additional compressive forces can be undesirable to the user, for example, by providing an unintended and involuntary more rigid or more flexible ride at different altitudes, atmospheric pressures, and / or temperatures. While some systems have been developed for manually depressurizing or pressurizing the suspension system to equalize the pressure in the volumetric chamber relative to the ambient atmospheric pressure, these systems require the user to identify the pressure difference and make subsequent inputs, which may require additional tools that are inconvenient for the user to carry or access during vehicle use. Summary of the Invention

[0004] In one embodiment, a bicycle suspension system includes a first tube having a first inner surface and a first outer surface, wherein the first outer surface is exposed to an ambient environment at atmospheric pressure. A second tube includes a second inner surface and a second outer surface, wherein the second tube is telescopically disposed within the first tube, and wherein at least a portion of the first inner surface faces and overlaps at least a portion of the second outer surface. The first and second tubes are telescopically movable relative to each other between at least a rest position, a compressed position, and an extended position. The first inner surface and the second outer surface define an internal chamber having a chamber pressure therebetween. A seal may be disposed between the first and second tubes and partially defines the internal chamber. The difference between the chamber pressure and atmospheric pressure defines a pressure differential. A bidirectional flow path is defined between the internal chamber and the ambient environment when the first and second tubes are in at least one or more of the rest position, compressed position, and extended position. The bidirectional flow path automatically provides: (1) a first airflow from the internal chamber to the surrounding environment when the pressure difference is greater than a first predetermined pressure difference, and (2) a second airflow from the surrounding environment to the internal chamber when the pressure difference is less than a second predetermined pressure difference.

[0005] In another embodiment, a bicycle suspension system includes a first tube having a first inner surface and a first outer surface, wherein the first outer surface is exposed to an ambient environment at atmospheric pressure. A second tube system includes a second inner surface and a second outer surface. The second tube is telescopically disposed within the first tube, wherein at least a portion of the first inner surface faces and overlaps at least a portion of the second outer surface. The first and second tubes are telescopically movable relative to each other between at least a rest position, a compressed position, and an extended position. The first inner surface and the second outer surface define an internal cavity between them. The second tube system includes a bypass volume formed on the second outer surface. A seal is disposed between the first and second tubes and partially defines the internal cavity. In one embodiment, the first tube system includes a seal engaging the second outer surface of the second tube, and at least one vent hole formed through at least one of the first tube and the seal. The seal includes spaced-apart lower and upper lips. When the first and second tubes move between the rest position and the compression position, or are positioned at least one of the rest position and the compression position, the lower lip is temporarily aligned with the bypass volume, and the at least one vent hole is in fluid communication with the bypass volume.

[0006] In another embodiment, a bicycle suspension system includes a first tube having a first inner surface and a first outer surface, wherein the first outer surface is exposed to an ambient environment at atmospheric pressure. A second tube system includes a second inner surface and a second outer surface. The second tube is telescopically disposed within the first tube, wherein at least a portion of the first inner surface faces and overlaps at least a portion of the second outer surface. The first and second tubes are telescopically movable relative to each other between at least a rest position, a compressed position, and an extended position. The first inner surface and the second outer surface define an internal cavity therebetween. The second tube system includes a bypass volume formed on the second outer surface. The first tube includes a seal engaging the second outer surface of the second tube, wherein the seal is temporarily aligned with the bypass volume when the first and second tubes are moved to at least one of the rest position, the compressed position, and the extended position. When the first and second tubes are in one of the resting, compressed, or extended positions, a first path is defined to the surrounding environment through the bypass volume. When the first and second tubes are in one of the resting, compressed, or extended positions, a second path is defined to the interior chamber through the bypass volume.

[0007] In another embodiment, one method of using a bicycle suspension system includes: reciprocating and telescopically moving a first tube having a first inner surface and a first outer surface relative to a second tube having a second inner surface and a second outer surface, wherein the second tube is telescopically disposed within the first tube, and at least a portion of the first inner surface faces and overlaps at least a portion of the second outer surface. The first outer surface is exposed to an ambient environment at atmospheric pressure, while the first inner surface and the second outer surface define an internal chamber with a chamber pressure therebetween. The method further includes: constructing a bidirectional flow path between the internal chamber and the surrounding environment, while reciprocating and extending the first tube relative to the second tube; if the chamber pressure is greater than atmospheric pressure, providing an airflow from the internal chamber to the surrounding environment through the flow path, while reciprocating and extending the first tube relative to the second tube; and if the chamber pressure is less than atmospheric pressure, providing an airflow from the surrounding environment to the internal chamber through the flow path, while reciprocating and extending the first tube relative to the second tube.

[0008] Various embodiments of the bicycle suspension system, the bicycle, and methods of using and assembling thereof offer significant advantages over other bicycle suspension systems and methods. For example, and not limitingly, the bicycle suspension system eliminates the need for manual operation of valves or manual intervention by the user during use to equalize the internal pressure within the sealed chamber with the ambient atmospheric pressure. Instead, the suspension system automatically ventilates or pressurizes the sealed volume chamber through bidirectional flow without any user intervention, whether in some embodiments by normal operation of the suspension system, in other embodiments by a resting state, or by some combination of ventilation and pressurization during use and / or rest.

[0009] The foregoing paragraphs have been provided in a general manner and are not intended to limit the scope of the claims presented below. Various preferred embodiments, together with further advantages, will be best understood by referring to the following detailed description in conjunction with the accompanying drawings. Simple Explanation of the Diagram

[0010] The object, features, and advantages of the present invention will become apparent after reading the following description in conjunction with the accompanying drawings, wherein:

[0011] Figure 1 is a side view of an example of a bicycle including a suspension system.

[0012] Figure 2 is a front view of a front suspension system used in a bicycle.

[0013] Figure 3 is a cross-sectional view of the front suspension system taken along line 3 of Figure 2.

[0014] Figure 4 is a cross-sectional view of the front suspension system taken along line 4 of Figure 2.

[0015] Figure 5 is a partial cross-sectional view of one embodiment of a suspension system located in a resting position.

[0016] Figure 6 is a partial cross-sectional view of the suspension system shown in Figure 5 in a compression position.

[0017] Figure 7A is a partial cross-sectional view of the suspension system shown in Figure 5 between the compression and rest positions.

[0018] Figure 7B is an enlarged cross-sectional view of the seal and bypass volume interface shown in Figure 7A.

[0019] Figure 8 is a partial cross-sectional view of the suspension system shown in Figure 5 in an extended position.

[0020] Figure 9A is a cross-sectional view of the suspension system shown in Figure 5, located between the extended and rest positions.

[0021] Figure 9B is an enlarged cross-sectional view of the seal and bypass volume interface shown in Figure 9A.

[0022] Figure 10A is a partial cross-sectional view of another embodiment of a suspension system in a resting position.

[0023] Figure 10B is an enlarged cross-sectional view of the seal and bypass volume interface shown in Figure 10A.

[0024] Figure 11A is a partial cross-sectional view of the suspension system shown in Figure 10A in a compression position.

[0025] Figure 11B is a partial cross-sectional view of the suspension system shown in Figure 10A in an extended position.

[0026] Figure 12 is an enlarged cross-sectional view of another embodiment of a suspension system in a resting position.

[0027] Figure 13A is a partial cross-sectional view of the suspension system shown in Figure 12 in a compression position.

[0028] Figure 13B is a partial cross-sectional view of the suspension system shown in Figure 12 in an extended position.

[0029] Figure 14 is a partial cross-sectional view of another embodiment of a suspension system.

[0030] Figure 15A is an enlarged cross-sectional view of the seal and bypass volume interface shown in Figure 14.

[0031] Figure 15B is an enlarged cross-sectional view of the seal and bypass volume interface shown in Figure 14, without a filter.

[0032] Figure 16 is an enlarged cross-sectional view of another embodiment of a suspension system.

[0033] Figure 17 is an enlarged cross-sectional view of another embodiment of a suspension system.

[0034] Figure 18 is an enlarged cross-sectional view of another embodiment of a suspension system.

[0035] Figures 19A and 19B are partial cross-sectional views of another embodiment of a suspension system located in a rest position and a compression position, respectively.

[0036] Figure 20 is an enlarged cross-sectional view of the seal and bypass volume interface shown in Figure 19 when they are in a compressed position.

[0037] Figure 21 is an enlarged cross-sectional view of the seal and bypass volume interface shown in Figure 19 when it is in an extended position.

[0038] Figure 22 is a partial cross-sectional view of another embodiment of a suspension system in a resting position.

[0039] Figure 23 is an enlarged cross-sectional view of another embodiment of a suspension system in a resting position.

[0040] Figure 24 is an enlarged cross-sectional view of another embodiment of a suspension system.

[0041] Figure 25A is a perspective view of one embodiment of a tube having a plurality of bypass volumes formed on one of its outer surfaces.

[0042] Figure 25B is an enlarged view of the bypass volume shown in Figure 25A.

[0043] Figure 26A is a perspective view of another embodiment of a tube having a bypass volume formed on one of its outer surfaces.

[0044] Figure 26B is an enlarged view of the bypass volume shown in Figure 26A.

[0045] Figure 27A is a perspective view of another embodiment of a tube having a bypass volume formed on one of its outer surfaces.

[0046] Figure 27B is an enlarged view of the bypass volume shown in Figure 27A.

[0047] Figure 28 is a perspective view of one embodiment of a bushing.

[0048] Figure 29 is a partial top view of the bushing shown in Figure 28.

[0049] Figure 30 is a perspective view of one embodiment of an absorber.

[0050] Figure 31 is a perspective view of one embodiment of a filter.

[0051] Figure 32 is a perspective view of one embodiment of a sealing element.

[0052] Figure 33 is a cross-sectional view of the seal shown in Figure 32.

[0053] Figure 34 is a perspective view of another embodiment of a seal.

[0054] Figure 35 is a cross-sectional view of the seal shown in Figure 32. Implementation

[0055] It should be understood that the term "plural" as used herein means two or more. As used herein, the term "longitudinal" means or relating to a length or longitudinal direction 2, for example, a direction along the length of a pipe 8, as shown in Figure 2, but is not limited to a linear path, such as if the pipe system is curved or curved. The term "lateral" as used herein means located, facing, or traveling in a side-to-side direction. The term "coupled" means connected or joined, whether directly or indirectly, for example, with an intermediary member, and does not require the joint to be fixed or permanent, although it may be fixed or permanent. The terms "first," "second," etc., as used herein, are not intended to assign to a specific component so named, but simply refer to these components in the numerical order stated therein, meaning that a component referred to as "first" may later be a "second" component, depending on the order in which they are mentioned. It should also be understood that the designations "first" and "second" do not necessarily mean that the two components or quantities referred to are different; for example, a first direction can be the same as a second direction, and each can be simply applied to different components. The terms "up," "down," "back," "front," "head," "tail," "upright," "horizontal," "right," "left," "inner," "outer," and their variations or derivatives refer to the orientation of an exemplary bicycle 50 shown in Figure 1, from the perspective of a user sitting on it. The term "crossing" means non-parallel. The terms "outer" and "outward" refer to a direction or feature facing away from a central location; for example, the phrases "radial outward," "radial direction," and / or their derivatives refer to a feature that deviates from a central location, such as a central axis 4 of the tube 8 shown in Figures 3 and 4. Conversely, the terms "inward" and "inward" refer to a direction facing that central or inner location. The term "subassembly" refers to an assembly of a plurality of components, and a subassembly can be further assembled into other subassemblies and / or a final assembly such as a bicycle 50.

[0056] Figure 1 illustrates an example of a bicycle, defined as a two-wheeled vehicle that may be motorized, human-powered, or a combination thereof. The bicycle includes a suspension assembly, shown as, for example, a front fork suspension assembly 60. In this example, the vehicle is a possible type of bicycle 50, such as a mountain bike. The bicycle 50 has a frame 52, handlebars 54 near the front end of one side of the frame, and a seat or saddle 56 for supporting a rider above the top of one side of the frame. The bicycle 50 also has a first or front wheel 58 supported by a front fork suspension assembly 60 or system supporting the front end of the frame. The bicycle 50 also has a second or rear wheel 62 supporting the rear end of one side of the frame 52. The rear end of the frame 52 may be supported by a rear suspension assembly 61, such as a rear shock absorber. The bicycle 50 also has a drive chain 64 equipped with a crank assembly 66, which is operatively coupled via a chain 68 to a rear cassette 70 near a hub providing a rotation axis for the rear wheel 62. The crank assembly 66 includes at least one, and generally two, crank arms 75 and pedals 76, and at least one front sprocket or chainring 77. A rear gearshift device 37, such as a derailleur, is mounted on the rear wheel 62 to move the chain 68 between different sprockets on the cassette 70. In one embodiment, a front gearshift device, such as a derailleur, may be configured to move the chain 68 between multiple sprockets on the crank assembly. In the illustrated example, a saddle 56 is supported on a link assembly 80, which includes a tube 81 having an end portion received in the top of a seatpost 89 of the frame, defining a socket. A clamping ring 91 can be tightened to secure the upper seat tube 81 to the lower frame seat tube 89.

[0057] In Figure 1, arrow A indicates a direction of normal riding or forward movement of bicycle 50. Although the bicycle 50 shown in Figure 1 is a mountain bike, the suspension assembly 60, including the specific embodiments and examples disclosed herein, as well as alternative embodiments and examples, can be implemented on other types of bicycles and vehicles, including, for example, motorcycles. For example, the disclosed fork suspension assembly 60 can be used on road bicycles, as well as bicycles with mechanical (e.g., cable, hydraulic, pneumatic, etc.) and non-mechanical (e.g., wired, wireless) drive systems and / or whether pneumatic or electric drive systems.

[0058] Referring now to Figures 2-4, the suspension assembly 60, or the fork assembly of Figure 1, is shown detached from the rest of the bicycle. The suspension assembly 60 includes a control tube 83 configured for attachment to the handlebars 54 and the bicycle frame 52. The suspension assembly 60 also includes at least one foot configured for rotatable attachment to a front wheel. In the illustrated embodiment, the suspension assembly 60 includes a first foot 104 and a second foot 106. The at least one foot includes a suspension system. The suspension system may include a damping system or both a damper 107 and a spring system 109. The two systems work together to form the suspension system. In the illustrated embodiment, the first foot 104 includes the damper 107, and the second foot 106 includes the spring system 109; however, either foot may include a damper and / or a spring system. In one embodiment, the suspension assembly may include only a single foot, wherein a damper and spring system are included in the single foot.

[0059] The first foot 104 and / or the second foot 106 may be constructed from a telescopic rod or tube 8, 16 referred to as a support. The first foot 104 and / or the second foot 106 may include an upper or inner tube 8 or support, and a lower tube 16 or support. In one embodiment, the lower tubes 16 of both the first foot 104 and the second foot 106 are formed from a single lower tube construction, which includes a bridging portion 18 assembled to attach the two lower tubes 16.

[0060] The suspension assembly 60 may also include one or more wheel attachment features 108, such as holes or pawls configured for hub attachment. The fork suspension assembly 60 may also include brake attachment features 110 configured for attachment to a wheel braking device such as a disc brake caliper. For example, the brake attachment features may include raised protrusions and holes for attachment to caliper fasteners. In one embodiment, such as the illustrated embodiment, the wheel attachment features 108 and the brake features 110 are included on a fork assembly attached to one of the two legs. For example, the fork assembly may be a single downtube construction, or a lower fork portion 111 including the pair of tubes 16. The lower fork portion may include the wheel attachment features 108 and / or the brake features 110. The single-piece lower tube structure can be formed from a single material such as a magnesium alloy, aluminum alloy, or other materials. In one embodiment, the single-piece lower tube structure is formed through a casting process. Additional machining or forming processes can be used to form specific features, shapes, and / or surfaces of the single-piece lower tube.

[0061] The suspension assembly 60 may also include a component forming the top of one or both feet, such as a fork crown 112. The fork crown 112 may be formed from a single piece spanning or forming the top of both the first foot 104 and the second foot 106. In one embodiment, the fork crown is formed from a single material such as aluminum or another material. In one embodiment, the fork crown is formed by a forging process. Additional machining or forming processes may be used to form specific features, shapes, and / or surfaces of the fork crown, including, for example, a pair of protrusion structures 22 defining a downwardly opening socket, the socket being sized and shaped to receive the end portion 24 of the upper or inner tube 8.

[0062] The control tube 83 is fixed to one of the center hub portions 93 of the fork crown and extends upward therefrom in the longitudinal direction 2. The control tube 83 is inserted into and coupled to one of the head tube 85 assemblies of the frame 52 by one or more bearings, which are otherwise referred to as a headset, and facilitate rotation between the control tube 83 and the head tube 85.

[0063] The suspension assembly 60 may also include a suspension element control device 67. In one embodiment, the suspension element control device may be attached to or at least partially integrated with the fork crown 112. The suspension element control device 67 is configured to modify, adapt, or otherwise alter a state of the suspension system. In the illustrated embodiment, the suspension element control device is configured to alter an operating state or one or more operating characteristics of the damper 107. As shown in FIG4, the damper 107 is a mechanical device configured to dissipate energy input to the suspension assembly due to impact or force being applied to it. Various dampers may include hydraulic, mechanical, or pneumatic damping mechanisms, or combinations of mechanical, pneumatic, and / or hydraulic damping mechanisms.

[0064] Referring to Figure 5-24, both the first and second legs 104 and 106 include an outer tube 16 and an inner tube, wherein the outer tube 16 has an inner surface 120 and an outer surface 122 exposed to an ambient environment at atmospheric pressure PA. The inner tube 8 also includes an inner surface 124 and an outer surface 126. As described, the tube 8 is telescopically disposed within the tube 16, wherein at least a portion of the first inner surface 120 faces and overlaps at least a portion of the second outer surface 126. Although the tube 8 is shown as an upper tube, it should be understood that the position can be reversed, wherein the inner tube 8 is a lower tube. In this way, the upper or inner tube 8 is shown to telescopically slide into the lower structure or outer tube 16, but can be assembled into an "inverted" layout, wherein the lower structure or tube 16 telescopically slides into the upper structure or tube 8. The inner and outer tubes 8 and 16 are telescopically movable relative to each other between at least one rest position (see FIG. 5), one compressed position (see FIG. 6), and one extended position (see FIG. 8). When the inner tube 8 is in the compressed position, it moves inward (e.g., downward in one embodiment) relative to the outer tube 16, and when it is in the extended position, it moves upward or outward relative to the outer tube 16. "Rest position" refers to the relative position of the inner and outer tubes 8 and 16 when no load is applied to the frame 52 or handlebar 54 by the user. "Compressed position" refers to any relative position of the inner and outer tubes 8 and 16 when the inner tube 8 moves inward relative to the outer tube 8, including a maximum compressed position where the inner and outer tubes 8 and 16 are at their bottom. "Extended position" refers to any relative position of the inner and outer tubes 8 and 16 when the inner tube 8 moves outward relative to the outer tube 16, including a maximum extended position where the inner and outer tubes are at their top.

[0065] The inner and outer tubes 8 and 16, including the gap space defined between the inner surface 120 of the outer tube 16 and the outer surface 126 of the inner tube 8, constitute an internal chamber 128 between them. This internal chamber 128 can be sealed to ensure that a lubricating fluid 130 (see, for example, FIG. 14) disposed within the internal chamber does not leak out of the chamber, and also to prevent contaminants such as dust and dirt from entering the chamber. For example, a seal 132 can be disposed between the outer surface of the inner tube 8 and the inner surface of the outer tube 16. The seal 132 can be fixed to the tube body 16, for example, to an inner surface at its tip, or to the tube body 8, for example, to an outer surface. The internal chamber 128 has a pressure PI. The seal 132 is slidably engaged and slides along the outer surface 126.

[0066] A pair of longitudinally spaced bushings 134 are disposed within the internal chamber, below a seal between the outer surface of the tube body 8 and the inner surface of the tube body 16. The bushings 134 provide a sliding interface between the inner and outer tubes 8 and 16. Referring to Figures 28 and 29, each bushing 134 is formed as an annular ring, which may have a split ring configuration with a small gap 136 or slit formed between adjacent ends 138 of the ring. Furthermore, each bushing 134 may include one or more relief surfaces 140 formed on one of the inner surfaces 142 of the bushing, wherein the relief surfaces extend across the entire height of the bushing. In some embodiments, one or more relief surfaces may also, or alternatively, be formed on one of the outer surfaces of the bushing. The gap 136 and / or the relief surface 140 provide a bushing flow path from one end of the bushing to the other and allow fluid communication from one end to the other, such that the space above and below the bushing 134 partially defines the internal chamber 128. Thus, the internal chamber 128 includes the volume between the tubes 8, 16 above and below the bushing 134, wherein the chamber pressure PI is equalized through the bushing flow path defined by the gap 136 and / or the relief surface 140.

[0067] The difference between chamber pressure and atmospheric pressure defines a pressure difference (PD = PI - PA). This pressure difference (PD) can be positive or negative and can vary depending on, for example, variable atmospheric pressure. For instance, a bicycle 50 may experience a change in atmospheric pressure (PA) when the user is riding at different altitudes, where atmospheric pressure decreases relative to altitude, so that the pressure difference (PD) may increase at higher altitudes and decrease at lower altitudes (e.g., become negative or create a vacuum). It should be understood that the absolute value of the pressure difference (PD) may increase at both higher and lower altitudes depending on the chamber pressure PI. Due to atmospheric pressure changes at the same altitude, such as those caused by storm events or temperature changes, similar pressure differences (PD) may occur even when the bicycle and suspension system are at rest.

[0068] Referring to Figures 5-24, various embodiments of the suspension assembly 60, when the inner and outer tubes 8, 16 are in at least one or more of the rest position, compressed position, and extended position, are constructed or defined by a bidirectional flow path 144, 146, 346, 446 between the internal chamber 128 and the surrounding environment. It should be understood that the bidirectional flow path may be defined by one or both of the first and second feet 104, 106. The bidirectional flow paths 144, 146, 346, 446 automatically provide: (1) a first airflow (defined as "ventilation") from the internal chamber 128 to the surrounding environment when the pressure difference (PD) is positive or greater than a first predetermined pressure difference; and (2) a second airflow (defined as "pressurization") from the surrounding environment to the internal chamber 128 when the pressure difference (PD) is negative or less than a second predetermined pressure difference. As used herein, the term "automatic" means an action that occurs during normal use and riding of the bicycle 50 and suspension assembly 60 or system, for example, when the bicycle is being ridden and the suspension assembly is thus compressed and extended, or when the suspension system and bicycle system are at rest without user interaction with the suspension assembly, or a combination of normal use and rest sequences. The term "automatic" explicitly excludes any user intervention other than normal use / riding interaction with the suspension system, and explicitly excludes manual actuation or intervention by the user, directly or indirectly, of any valve or actuator to release or alleviate pressure differentials, whether by venting or pressurizing the internal chamber 128. In one embodiment, the bidirectional flow path is configured as a "position-sensitive" or "position-dependent" path, wherein the relative positions of the tubes 8, 16 define when the bidirectional flow path is connected between the internal chamber and the surrounding environment. In other embodiments, the bidirectional flow is "position-independent," meaning that the bidirectional flow path is not defined by the relative positions of the tubes 8, 16.

[0069] The bidirectional flow path: (1) can be direct and continuous between the internal chamber and the surrounding environment (e.g., through a path 346 located below a vent hole (Figures 14-18), and is "positionally" independent; (2) can be direct and intermittent, for example, a path 446 that passes through a bypass volume from the internal chamber to an intermediate position (e.g., the seal volume 168) and then simultaneously through a vent hole 194 or a bypass volume 148. (Figs. 10B, 12-13B, 19-24) from the sealing volume 168 to the surrounding environment, or vice versa, and are “positionally” dependent; or (3) may be discontinuous and intermittent (and “positionally” dependent), for example including a first flow path 146, which, at one or more first times (e.g., up / down movement of the bypass volume of the lower lip of the seal), passes through the bypass volume 148 from the internal chamber to an intermediate location (e.g., the sealing volume 168), and a second flow path 144, which, at one or more times different from the first time (Figs. 5-9B) A second time (e.g., up / down movement of the upper lip of the seal through the bypass volume) from the intermediate location (defined by the seal volume 168 in one embodiment) to the surrounding environment via the bypass volume 148, and vice versa, includes a third path that, at one or more third times, flows from the surrounding environment to an intermediate location (e.g., the seal volume 168) via the bypass volume 148, and a second path that, at one or more fourth times different from the third time, flows from the intermediate location (defined by the seal volume 168 in one embodiment) to the internal chamber 128 via the bypass volume 148. It should be understood that the first and fourth times may be the same, and the second and third times may be the same, wherein the flow path is determined by the differential pressure between the internal chamber, the intermediate location, and the surrounding environment.

[0070] In one embodiment of the bicycle suspension assembly 60 or system, and referring to Figures 5-13B and 19-27B, the tube 16 includes a seal 132, and the tube 8 includes at least one bypass volume 148 formed on the outer surface 126. It should be understood that the inner tube 8 may include a seal, wherein the outer tube 16 is configured with bypass volumes. In one embodiment, the inner tube 8 is configured with a single bypass volume 148, while in other embodiments, such as shown in Figure 25A, a plurality of bypass volumes 148 are circumferentially spaced around the outer surface 126 of the inner tube. The bypass volumes may also be spaced longitudinally along the tube 8. In one embodiment, the bypass volume 148 is defined as a recess or depression formed in the outer surface of the tube, wherein the bypass volume has a depth (d) less than the wall thickness (t) of the inner tube 8, as shown in Figure 9B. The bypass volume 148 may have a circumferential width (w) and an axial length (L), wherein the length (L) is greater than the width (w) in one embodiment (FIG. 25B) and the width (w) is greater than the length (L) in another embodiment (FIG. 26B). Of course, the width and length may be the same, for example, when the bypass volume 148 is circular. In some embodiments, the inner wall of the bypass volume 148 may be concave, having curved sidewalls 150 and a flat bottom 152. Referring to FIG. 27A and B, the bypass volume is assembled into an annular recess 154 extending around a full periphery of the outer surface of the tube body 8 or the inner surface of the tube body 16. The recess 154 may have curved top and bottom walls 158 transitioning to the outer surface 126, and a flat circumferential bottom 156. In any embodiment, the bypass volume 148 defines a cavity in the wall 160 of the tube body. The bypass volume can be defined as a seal-surface interruption structure, meaning a space created between sealing surfaces to create a flow path. This space can be created by a recess extending radially inward from the surface of the tube, or by an outward protrusion extending radially outward from the outer surface of the tube, including, but not limited to, surface roughness that impairs the seal.

[0071] In one embodiment of a bicycle suspension system, and referring to Figures 5-11B, 14-24, and 32-35, the seal 132 has a K-shaped cross-section, comprising an annular base portion 162 which is engageable or coupled to the inner surface 120 of the outer tube 16; and spaced-apart annular lower lip 164 and upper lip 166 or feet, wherein the lower lip 164 extends downward and inward from the base portion, and the upper lip 166 extends upward and inward from the base portion. The upper lip 166 and the lower lip 164 are elastic and flexible, and slidably engage the outer surface 126 of the inner tube 8 to form a seal that seals the inner chamber 128 relative to the surrounding environment. In this respect, it should be understood that the inner chamber 128 includes any internal space that is internally spaced from the surrounding environment below or by means of the seal 132. The upper lip 166 and the lower lip 164 define a sealing volume 168 between them, which is defined as a cavity between the seal 132 and the outer surface 126 of the inner tube 8. In this way, the sealing volume 168 is defined by the inner surface 174 of the base portion and the upper and lower lips.

[0072] In one embodiment, as shown in Figures 32 and 33, a vent 170 is formed through the base portion 162 of the seal 132 to communicate with the seal volume 168, wherein the vent 170 provides flow communication between an outer surface 172 of the seal and an inner surface 174 of the seal, or between an upper lip 166 and a lower lip 164 defined therebetween. In another embodiment shown in Figures 34 and 35, a plurality of vents 170 are circumferentially spaced around the base portion 162 and the seal 132. A seal may alternatively be configured with a single lip or more than two lips. For example, in another embodiment shown in Figures 12-13B, a seal 180 is formed as an O-ring, which may have a circular or elliptical cross-section and does not define or provide any seal volume.

[0073] Referring to Figures 5-11B and 14-24, a breathable absorber 182 is disposed between the inner surface 120 of the outer tube 16 and the outer surface 126 of the inner tube 8, and between the bushing 134 and the proximal end 184 of the tube 16 exposed to the surrounding environment. The absorber 182 can be assembled into an annular ring. The absorber 182 allows the flow of gases such as air through it, but absorbs and prevents the transfer of liquids such as lubricating oil. In this way, the absorber does not define a gas barrier within the internal chamber 128, but is disposed within and defines a portion of the internal chamber 128. The absorber can be made of closed-cell foam, open-cell foam, or a sponge material formed from a polymer-based material.

[0074] Referring to the embodiment in Figures 5-9B, the bidirectional flow paths 144 and 146 include: a first flow path 144, which, when the tubes 8 and 16 are in one of the compressed or extended positions (see, for example, Figure 9B), flows from the sealing volume 168 to the surrounding environment via the bypass volume 148; and a second flow path 146, which, when the first and second tubes 8 and 16 are in the other of the compressed or extended positions, flows from the internal chamber 128 to the sealing volume 168 via the bypass volume 148. For example, as shown in Figure 5, the tubes 8 and 16 are in a resting position, wherein the bypass volume 148 is positioned between the upper lip 166 and the lower lip 164, or aligned with the sealing volume 168, such that none of the internal chamber 128, the bypass volume 148, or the sealing volume 168 is in flow communication with the surrounding environment. In Figure 6, tubes 8 and 16 are in a maximum compression position, with the bypass volume 148 positioned below the lower lip 164 to allow flow communication between the bypass volume 148 and the internal chamber 128, albeit through the absorber 182. In the compression positions shown in Figures 7A and 7B, whether moving downwards or upwards, the bypass volume 148 is temporarily aligned with the lower lip 164 as tubes 8 and 16 move back and forth between the resting and compression positions, thereby allowing or providing a flow path 146 through the bypass volume 148 between the internal chamber 128 and the sealing volume 168 or the lip. In this position, even if the lower lip 164 is elastically biased inwards, it will not engage with the bottom of the bypass volume to create a flow path 146. The upper lip 166 engages with and seals against the external surface 126 above the bypass volume 148. As the tubes 8 and 16 travel back and forth between the resting and extended positions, as shown in Figures 9A and 9B, the bypass volume 148 is temporarily aligned with the upper lip 166, thereby allowing or providing a flow path 144 through the bypass volume between the sealing volume 168 or the cavity between the lips and the surrounding environment. In this position, even if the upper lip 166 is elastically biased inward, it will not engage with the bottom of the bypass volume 148 to create a flow path 144. The lower lip 164 engages below the bypass volume 148 and seals against the outer surface 126. In other words, the interaction between the seal 132 and the bypass volume 148 results in: if the pressure difference is positive or greater than a first predetermined pressure difference (PPD1), air is intermittently drawn in from the internal chamber 128 and delivered to the surrounding environment via the seal volume 168; and if the pressure difference is negative or less than a second predetermined pressure difference (PPD2), the pressure difference is minimized or moved toward zero (0) from the surrounding environment to the internal chamber 128 via the seal volume 168, for example when the first and second predetermined pressure differences (PPD1, PPD2) are zero (0).In this manner, it should be understood that the flow paths 144 and 146 are bidirectional and dependent on the pressure difference, meaning that flow can be directed from the surrounding environment through the bypass volume 148 to the sealing volume 168, and then from the sealing volume 168 through the bypass volume 148 to the internal chamber 128, or vice versa. In this way, an intermittent bidirectional flow path is defined and constructed between the internal chamber 128 and the surrounding environment. Thus, during the reciprocating expansion and contraction of the tubes 8 and 16, the bypass volume 148 can transport a small volume of differential-pressure air through the seal 132, or the bypass volume 148 can create temporary fluid communication between the sealed chamber 128 and the surrounding environment. This volumetric transport and / or temporary fluid communication equalizes the pressure difference between the surrounding environment and the internal chamber 128.

[0075] It should be understood that if the location of the seal and bypass volume is reversed, or if the inner / outer position of the tube is reversed, such flow paths can be defined by the opposite action of compression and extension of the tubes 8 and 16.

[0076] Referring to Figures 10A-13B, in another embodiment, the entire seal 132, including the upper lip 166 and lower lip 164 of the embodiment shown in Figures 10A-11B, or the O-ring seal 180 of Figures 12-13B, may be temporarily aligned with the bypass volume 148 when the first and second tubes are moved to at least one of the compressed, resting, and extended positions. In this embodiment, when the seals 132 and 180 are temporarily aligned with at least one bypass volume 148, the bypass volume 148 is temporarily defined as a direct bidirectional flow path 446 between the internal chamber 128 and the surrounding environment, meaning that this flow path in this embodiment does not require two-step flow transfer.

[0077] Referring now to Figures 14-24, another embodiment of the suspension assembly 60 includes a bidirectional flow path defined by at least one vent 194 formed in the tube 16. It should be understood that in some embodiments, a plurality of circumferentially spaced vents 194 are formed in the tube. In one embodiment shown in Figures 14-16, the vent 194 is formed through the wall 260 of the tube 8 and is in direct fluid communication with the internal chamber 128. A permeable filter 196 may be positioned across the vent 194, as shown in the embodiments of Figures 14, 15A, and 16. As shown in Figure 15B, this filter may be omitted. The filter 196 allows the flow of gases such as air through the filter, but absorbs and prevents the transfer of liquids such as lubricating fluid 130. The permeable filter 196 may be a Gore-Tex material or a similar membrane, which allows smaller air molecules to pass through but excludes larger oil molecules. In one embodiment, the tube 16 may include a housing 198 extending radially outward from an outer surface 122, the housing partially defining the vent 194. The filter 196 may be disposed within the housing 198, spanning the vent 194.

[0078] The vent 194 may include an inlet port 200 configured with a single-way inlet valve 202 and an outlet port 204 configured with a single-way outlet valve 206, for example, wherein the inlet and outlet ports are formed within the housing, and the inlet and outlet valves are housed within the housing. The inlet and outlet ports 200 and 204 are in fluid communication with the surrounding environment. The inlet and outlet valves 206 and 202 may be configured to open at individual first and second predetermined pressure differences; for example, the outlet valve may be configured to open when a first predetermined pressure difference is equal to or greater than 0 PSI and a second predetermined pressure difference is equal to or less than 0 PSI. In one embodiment, the "opening" pressure for opening the inlet and outlet valves 206 and 202 may be approximately between 0.1 psi and 5 psi, or between 0.1 psi and 5 psi, or approximately 0.5 psi. The absolute values ​​of the first and second predetermined pressure differences may be the same or different. In one embodiment, the inlet and outlet ports can be configured into a single passage, wherein two valves are disposed in the passage and define the discharge and inlet valves.

[0079] In another embodiment shown in Figure 16, the inlet and outlet ports are omitted, wherein the vent 194 is formed in the pipe wall 260 and the outer casing 198, directly communicating with the surrounding environment. A filter 196 may be connected to the outer casing and is positioned across the vent 194. Referring to the embodiment shown in Figure 17, the vent 194 is formed in and passes through the pipe wall 260, the bushing 134, and the outer casing 198. Referring to the embodiment shown in Figure 18, the vent 194, formed to pass through the pipe wall 260 and the outer casing 198, is above the bushing 134 and below the seal 132, communicating with the internal chamber 128, for example, with the absorber 182. In the embodiments of Figures 14-18, the bypass volume may be omitted. It should be understood that, in any embodiment, the filter 196, inlet and outlet ports 200, 204, and / or inlet and outlet valves 202, 206 may be incorporated or omitted as desired, and may be located below, at, or above the bushing 134. These inlet and outlet valves 206, 202 may be mechanically or electronically controlled based on pressure values, position, or any other measurable system function, and may define a first predetermined pressure difference (PPD1) and a second predetermined pressure difference (PPD2), respectively.

[0080] Referring now to Figures 19-24, various embodiments incorporate a bypass volume 148 and a vent 194. For example, as shown in Figures 19-22, the vent 194 is formed in and passes through the outer tube 16 and the seal 132, and is in flow communication with the bypass volume 148 and the seal volume 168. In one embodiment, the vent 194 is formed to at least partially pass through the seal 132. A bidirectional flow path can be defined by the operation of the bypass volume as described above, or further through the vent 194 between the seal volume 168 and the surrounding environment. In one embodiment, the bypass volume 148 is positioned such that it never aligns with the upper lip 166, meaning that the upper lip always maintains a seal with the outer surface 126 of the tube body 8. Referring to Figure 22, when the tubes 8 and 16 are in the resting position, the absorber 182 is positioned in the sealing volume 168 between the upper lip 166 and the lower lip 164, opposite the bypass volume 148. The absorber 182 absorbs lubricating oil that may be in the bypass morphology or on the tube wall 160. Generally, the lubricating fluid 130 (e.g., oil) is housed within the outer tube 16, thus defining the lower fork chamber 230, as shown in Figure 14. The absorber 182 also functions as a filter, preventing system lubricating oil from entering the vent hole 194, or preventing external contaminants from reaching or interfacing with the inner chamber 128 or bushing 134. With the reciprocating extension and retraction of the tubes 8 and 16, the bypass volume 148 establishes temporary fluid communication with the surrounding environment through the vent hole 194. As described above, there may be more than one vent hole 194. Temporary fluid connectivity is equalized by the differential pressure between the surrounding environment and the internal chamber 128.

[0081] Referring to Figures 23 and 24, the tube body 16 includes a socket 240. A plug 250 is disposed in the socket 240 and can be secured in the socket by compression, threading, adhesive or other suitable fasteners. The plug 250, the tube body 16 and the seal 132 can partially and in combination define the vent 194. The plug 250 can also be configured with a breathable filter 196 (Figure 23) and / or with inlet and outlet ports 200, 204 of single-way inlet and outlet valves 202, 206. operate

[0082] Referring to the embodiments in Figures 10A-13B, at certain points in the relative travel of the upper (inner) and lower (outer) tubes 8, 16, possibly in a resting position or for a short duration during a travel event, the bypass volume 148 can provide automatic and direct ventilation from the internal chamber 128 to the atmosphere. In other relative positions of the tubes 8, 16, seals 132, 180 are biased against the outer surface 126 and seal the internal chamber 128 to isolate it from the surrounding environment.

[0083] Referring to the embodiment in Figures 5-9B, during a stroke event, such as during compression or in a compression position, the bypass volume 148 system fluidly communicates the seal volume 168 with the internal chamber 128 partially defined by the lower fork chamber, equalizing the pressure of the seal volume 168 with that of the internal chamber 128. At another time during the stroke event, such as during extension or in an extension position, the bypass volume system fluidly communicates the seal volume 168 with the surrounding environment. This process is repeated during the use and reciprocating motion of the tubes 8 and 16 to automatically minimize the differential pressure between the internal chamber 128 and the surrounding environment.

[0084] Referring to the embodiment in Figures 14-18, the internal chamber is continuously ventilated through a vent 194, which connects the internal chamber 128 to the surrounding environment, regardless of the relative positions of the upper (inner) and lower (outer) pipes 8 and 16. The flow through this vent can be filtered by a filter 196 and automatically regulated by inlet and outlet valves 202 and 206, although the vent 194 is always in fluid communication with the surrounding environment.

[0085] Referring to the embodiment in Figures 19-24, the pressure difference is equalized through a combination of a bypass volume 148 and a vent 194. During a stroke event, such as during compression or in a compression position, the bypass volume 148 system fluidly communicates the seal volume 168 with the internal chamber 128 partially defined by the lower fork chamber, equalizing the pressure of the seal volume 168 with that of the internal chamber 128. The seal volume 168 then communicates with the surrounding environment through the vent 194, which is formed to at least partially pass through the seal 132. This process is repeated during the use and reciprocating motion of the tubes 8, 16 to automatically minimize the pressure difference between the internal chamber 128 and the surrounding environment. At another time during a stroke event, such as during extension or in an extension position, the bypass volume may (but is not necessary) fluidly communicate the seal volume 168 with the surrounding environment.

[0086] The embodiments described herein are intended to provide a general understanding of the structure of various embodiments. These embodiments are not intended to constitute a complete description of all elements and features of devices and systems utilizing the structures or methods described herein. Many other embodiments will become apparent to those skilled in the art upon review of this disclosure. Other embodiments may be utilized and derived from this disclosure, allowing for structural and logical substitutions and changes without departing from the scope of this disclosure. Furthermore, these embodiments are representative only and may not be drawn to scale. Some scales in these embodiments may be enlarged, while others may be minimized. Accordingly, this disclosure and the drawings are to be considered illustrative rather than restrictive.

[0087] While this specification contains numerous details, these should not be construed as limiting the scope of the invention or the content that may be claimed, but rather as descriptions of features specific to particular embodiments of the invention. Certain features described in this specification within the context of separate embodiments may also be combined and implemented in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments. Furthermore, although features may be described above as acting in certain combinations and even claimed so at the outset, one or more features from a claimed combination may, in some cases, be omitted from that combination, and the claimed combination may be for a sub-combination or a variation thereof.

[0088] Similarly, although operations and / or actions are illustrated in the diagrams and described herein in a specific order, this should not be construed as requiring these operations to be performed in the specific order shown or in sequential order, or as requiring all illustrated operations to achieve the desired result. In some cases, multiplexing and parallel processing may be advantageous. Furthermore, the separation of various system components in the embodiments described above should not be construed as requiring such separation in all embodiments, and it should be understood that any illustrated program components and systems may be substantially integrated together in a single software product or packaged into multiple software products.

[0089] In this document, one or more embodiments of the present disclosure may be referred to individually and / or collectively as the "invention," for convenience only and not intended to voluntarily limit the scope of this application to any particular invention or inventive concept. Furthermore, while specific embodiments have been illustrated and described herein, it should be understood that any subsequent configurations designed to achieve the same or similar purposes may replace the specific embodiments shown. This disclosure is intended to encompass any and all subsequent adaptations or variations of the various embodiments. Upon review of this description, combinations of the above embodiments and other embodiments not specifically described herein will be readily apparent to those skilled in the art.

[0090] This summary of disclosure is provided to comply with 37 CFR §1.72(b) and is intended not to be construed as limiting the scope or meaning of the claims. Furthermore, in the foregoing embodiments, various features may be grouped together or described in a single embodiment for the purpose of streamlining this disclosure. This disclosure should not be construed as reflecting an intention to require features beyond those explicitly stated in each claim. Rather, as reflected in the following claims, the object of the invention may address all features of fewer than any of the disclosed embodiments. Therefore, the following claims are incorporated into the embodiments, wherein each claim is independently defined as a separate object of the claim.

[0091] The foregoing detailed description is intended to be illustrative rather than restrictive, and it should be understood that the following 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 stated otherwise. Therefore, all embodiments falling within the scope and spirit of the following claims and their equivalents are claimed as part of the invention.

[0092] While embodiments are described for illustrative purposes, those skilled in the art will understand that various modifications, additions, and substitutions can be made without departing from the scope and spirit of this disclosure. Therefore, the foregoing description is intended to be illustrative rather than restrictive, and it should be understood that all equivalents and / or combinations of the intended embodiments and examples are included in this description.

[0093] Although certain parts, components, features, and methods of operation and use have been described herein in accordance with the teachings of this disclosure, the scope of this patent is not limited thereto. Rather, this patent covers all embodiments taught in this disclosure that fall entirely within the scope of permissible equivalents.

[0094] From the above discussion, it will be understood that the present invention can be embodied in various embodiments, including but not limited to the following: Example 1 A bicycle suspension system, comprising: A first tube includes a first inner surface and a first outer surface, wherein the first outer surface is exposed to an ambient environment at atmospheric pressure. A second tube comprising a second inner surface and a second outer surface, wherein the second tube is telescopically disposed within the first tube, wherein at least a portion of the first inner surface faces and overlaps with at least a portion of the second outer surface, wherein the first tube and the second tube are telescopically movable relative to each other between at least a resting position, a compressed position, and an extended position, and wherein the first inner surface and the second outer surface define an internal chamber having a chamber pressure therebetween, wherein the difference between the chamber pressure and the atmospheric pressure defines a pressure difference; and A bidirectional flow path is defined between the internal chamber and the surrounding environment when the first tube and the second tube are in at least one or more of the resting position, the compression position and the extension position, wherein the bidirectional flow path automatically provides: (1) a first airflow from the internal chamber to the surrounding environment when the pressure difference is greater than a first predetermined pressure difference, and (2) a second airflow from the surrounding environment to the internal chamber when the pressure difference is less than a second predetermined pressure difference. Example 2: The bicycle suspension system of Example 1, wherein one or both of the first predetermined pressure difference and the second predetermined pressure difference are zero. Example 3: A bicycle suspension system as in Example 1, wherein the bidirectional flow path includes at least one bypass volume formed on the second outer surface of the second tube. Example 4: A bicycle suspension system as described in Example 3, wherein the at least one bypass volume comprises a plurality of bypass volumes circumferentially spaced around the outer surface of the second tube. Example 5: A bicycle suspension system as described in Example 3, wherein the at least one bypass volume includes a circumferential width and an axial length. Example 6: The bicycle suspension system of Example 5, wherein the circumferential width is greater than the axial length. Example 7: The bicycle suspension system of Example 5, wherein the axial length is greater than the circumferential width. Example 8: A bicycle suspension system as described in Example 3, wherein the at least one bypass volume includes an annular recess extending around the entire periphery of one of the second outer surfaces. Example 9: A bicycle suspension system as described in Example 3, wherein the bidirectional flow path includes: a first path that, when the first pipe and the second pipe are in one of the compressed position or the extended position, passes through the bypass volume to the surrounding environment; and a second path that, when the first pipe and the second pipe are in the other of the compressed position or the extended position, passes from the internal chamber through the bypass volume. Example 10: A bicycle suspension system as described in Example 3, wherein the first tube includes a seal that connects to the second outer surface of the second tube. Example 11: A bicycle suspension system as in Example 10, wherein the seal includes a spaced-apart first lip and second lip, wherein when the first tube and the second tube move between the rest position and the compression position and the extension position, the first lip is temporarily aligned with the bypass volume. Example 12: A bicycle suspension system as in Example 11, wherein when the first tube and the second tube move between the rest position and the other of the compressed position and the extended position, the second lip is temporarily aligned with the bypass volume. Example 13: A bicycle suspension system as in Example 10, wherein when the seal moves to at least one of the compression position, the rest position, and the extension position of the first tube and the second tube, it is temporarily aligned with the at least one bypass volume, wherein the at least one bypass volume temporarily defines the bidirectional flow path between the internal chamber and the surrounding environment when the seal is temporarily aligned with the at least one bypass volume. Example 14 The bicycle suspension system of Example 1 further includes a bushing disposed between the first inner surface of the first tube and the second outer surface of the second tube. Example 15: A bicycle suspension system as described in Example 14, wherein the bushing includes a bushing flow path that partially defines the bidirectional flow path. Example 16 The bicycle suspension system of Example 14 further includes a breathable absorber disposed between the first inner surface of the first tube and the second outer surface of the second tube, and disposed between the bushing and a proximal end of the first tube. Example 17: A bicycle suspension system as described in Example 14, wherein the bidirectional flow path includes at least one vent hole formed in the first tube. Example 18: A bicycle suspension system as described in Example 17, wherein the at least one vent hole is in direct fluid communication with the internal chamber. Example 19: A bicycle suspension system as in Example 17, wherein the bushing is coupled to the first tube and moves together with the first tube, and wherein the at least one vent hole is formed in the first tube and the bushing. Example 20: The bicycle suspension system of Example 17 further includes a breathable filter disposed across the at least one vent hole. Example 21: The bicycle suspension system of Example 17, wherein the at least one vent includes an inlet port with an inlet valve and an outlet port with an outlet valve, wherein the inlet port and the outlet port are in fluid communication with the surrounding environment. Example 22: The bicycle suspension system of Example 3, wherein the bidirectional flow path includes at least one vent hole formed in the first pipe and in communication with the at least one bypass volume flow. Example 23: The bicycle suspension system of Example 22 further includes a breathable filter disposed across the at least one vent hole. Example 24: A bicycle suspension system as described in Example 23, wherein the at least one vent includes an inlet port with an inlet valve and an outlet port with an outlet valve, wherein the inlet port and the outlet port are in fluid communication with the surrounding environment. Example 25: A bicycle suspension system as in Example 22, wherein the first tube includes a seal connecting the second outer surface of the second tube, wherein the at least one vent hole is formed to at least partially pass through the seal. Example 26: A bicycle suspension system as in Example 22, wherein the first tube includes at least one inlet and further includes at least one plug disposed in the at least one inlet, wherein the at least one plug partially defines the at least one vent hole. Example 27: A bicycle suspension system as in Example 17, wherein the at least one vent includes a plurality of vents spaced apart around the circumference of the first tube.

[0095] 2: Vertical direction 3: Line 4: Central axis, line 8: First tube, tube body, inner tube 15A: See the magnified portion of Figure 15A. 16: Second pipe, pipe body, lower pipe, outer pipe 18: Bridging section 22: Convex structure 24: End portion 37: Rear gear conversion device 50: Exemplary bicycle, bicycle 52: Bicycle frame, frame 54: Handle 56: Saddle 58: Front wheel 60: Front fork suspension assembly, suspension assembly 61: Rear suspension components 62: Rear wheel 64: Drive Chain 66: Crank assembly 67: Suspension Component Control Device 68: Chain 70: Rear flywheel, flywheel 75: Crank arm 76: Pedal 77: Chain Link 80: Seatpost Subassembly 81: Upper seat tube, tube body 83: Control tube 85: Head tube 89: Lower frame seatpost, frame seatpost 91: Clamping ring 93: Center hub section 104: First kick 106: Second kick 107: Damper 108: Wheel attachment morphology 109: Spring System 110: Brake attachment shape, brake shape 111: Lower part of the fork 112: Fork crown 120: First internal surface, internal surface 122,172:External surface 124, 142, 174: Internal surfaces 126: Second outer surface, outer surface 128: Sealed volumetric chamber, internal chamber 130: Lubricating fluid 132: Seals 134: Bushing 136: Gap 138: Proximity End 140: Let the noodles 144: Second flow path, first flow path, flow path, bidirectional flow path 146: Second flow path, first flow path, flow path, bidirectional flow path 148: Bypass volume, bypass 150: Curved sidewall 152: Flat bottom 154: Annular concave part, concave part 156: Flat circular bottom 158: Curved top and bottom walls 160, 260: pipe wall, wall 162: Annular base portion, base portion 164: Lower lip 166: Upper lip 168: Seal volume 170, 194: Ventilation holes 180: O-ring seal, seal 182: Breathable absorbent, absorbent 184: Proximal 196: Breathable filter, filter 198: Outer shell 200: Entrance Port 202: Single-way inlet valve, inlet valve 204: Export Port 206: Single-way discharge valve, discharge valve 230: Inferior bifurcation chamber 240: Socket 250: Plug 346,446: Bidirectional flow path, path A: Arrow A PA: Atmospheric pressure PD: Pressure Difference PI: Chamber pressure PPD1: First predetermined pressure difference PPD2: Second predetermined pressure difference

Claims

1. A bicycle suspension system comprising: a first tube including a first inner surface and a first outer surface, wherein the first outer surface is exposed to an ambient environment at atmospheric pressure; a second tube including a second inner surface and a second outer surface, wherein the second tube is telescopically disposed within the first tube, wherein at least a portion of the first inner surface faces and overlaps with at least a portion of the second outer surface, wherein the first tube and the second tube are telescopically movable relative to each other, and wherein the first inner surface and the second outer surface define an internal chamber having a chamber pressure therebetween; and an intermittent bidirectional flow path defined between the internal chamber and the ambient environment, wherein the intermittent bidirectional flow path communicates between the internal chamber and the ambient environment when the first tube and the second tube are in a first position, and wherein the intermittent bidirectional flow path does not communicate between the internal chamber and the ambient environment when the first tube and the second tube are in a second position.

2. The bicycle suspension system of claim 1, wherein the first tube and the second tube are telescopically movable relative to each other between at least a compressed position, an extended position and a resting position, the resting position being between the compressed position and the extended position.

3. The bicycle suspension system of claim 2, wherein the first position is the extended position, the resting position, or between the extended position and the resting position.

4. The bicycle suspension system of claim 2, wherein the first position is between the rest position and the compression position and wherein the second position is between the first position and the compression position.

5. The bicycle suspension system of claim 2, wherein a reciprocating extension and retraction of the first tube and the second tube between the compressed position and the extended position creates a temporary fluid communication across the intermittent bidirectional flow path between the internal chamber and the surrounding environment.

6. The bicycle suspension system of claim 1, wherein the intermittent bidirectional flow path includes at least one bypass volume formed on the second outer surface of the second tube.

7. The bicycle suspension system of claim 1, wherein the intermittent bidirectional flow path includes at least one vent hole formed through at least one element.

8. The bicycle suspension system of claim 7, wherein the at least one vent hole is formed through the first pipe.

9. The bicycle suspension system of claim 1, wherein a difference between the chamber pressure and the atmospheric pressure defines a pressure difference, and wherein the fluid communication across the intermittent bidirectional flow path depends on the pressure difference.

10. The bicycle suspension system of claim 9, wherein when the first pipe and the second pipe are in a first position, when the pressure difference is greater than a first predetermined pressure difference or less than a second predetermined pressure difference, the intermittent bidirectional flow path connects the internal chamber to the surrounding environment, and wherein when the pressure difference is between the first predetermined pressure difference and the second predetermined pressure difference, the intermittent bidirectional flow path does not connect the internal chamber to the surrounding environment.

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