U.S. patent application number 17/087307 was filed with the patent office on 2022-05-05 for bicycle adjustable seatpost.
This patent application is currently assigned to TIEN HSIN INDUSTRIES CO., LTD.. The applicant listed for this patent is TIEN HSIN INDUSTRIES CO., LTD.. Invention is credited to WEI-KONG SHENG.
Application Number | 20220135160 17/087307 |
Document ID | / |
Family ID | |
Filed Date | 2022-05-05 |
United States Patent
Application |
20220135160 |
Kind Code |
A1 |
SHENG; WEI-KONG |
May 5, 2022 |
BICYCLE ADJUSTABLE SEATPOST
Abstract
A bicycle adjustable seatpost includes a seatpost assembly,
connecting base, telescopic cylinder, and control assembly. The
cylinder of telescopic cylinder is connected to outer tube of
seatpost assembly. The piston rod of telescopic cylinder is
connected to inner tube of seatpost assembly and divides cylinder
into first and second chambers. The connecting base is connected to
saddle and has a motor chamber. The control assembly includes a
motor including a cam and an actuation rod. The motor is in the
motor chamber; the actuation rod is in the seatpost assembly and
one end thereof extends into the motor chamber; the cam abuts
against the actuation rod. When the cam is driven by the motor to
rotate, the actuation rod reciprocates along axis thereof to
connect or block the chambers. When the chambers are connected, the
seatpost assembly length and saddle height can be adjusted.
Inventors: |
SHENG; WEI-KONG; (Taichung
City, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
TIEN HSIN INDUSTRIES CO., LTD. |
Taichung City |
|
TW |
|
|
Assignee: |
TIEN HSIN INDUSTRIES CO.,
LTD.
Taichung City
TW
|
Appl. No.: |
17/087307 |
Filed: |
November 2, 2020 |
International
Class: |
B62J 1/08 20060101
B62J001/08; B62J 43/30 20060101 B62J043/30 |
Claims
1. A bicycle adjustable seatpost, comprising: a seatpost assembly
which comprises an outer tube and an inner tube whose outer
diameter is smaller than an inner diameter of the outer tube,
wherein the inner tube is at least partially disposed in the outer
tube and is movable along an axial direction of the outer tube; the
outer tube is provided to be installed in a frame of a bicycle; a
connecting base which is provided at an end of the inner tube to be
connected to a saddle of the bicycle, wherein the connecting base
has a motor chamber and a battery chamber; the motor chamber
communicates with the interior of the inner tube; a telescopic
cylinder which comprises a cylinder and a piston rod, wherein the
cylinder is connected to the outer tube and is filled with a fluid;
the piston rod comprises a rod and a piston head connected to the
rod; the rod is connected to the inner tube, wherein one end of the
rod extends into the cylinder and is connected to the piston head;
the piston head divides the cylinder into a first chamber and a
second chamber; and a control assembly which comprises a motor, an
actuation rod, a cam, a control circuit board, and a battery; the
motor is provided in the motor chamber, and comprises an output
shaft; the actuation rod is provided in the seatpost assembly, and
one end of the actuation rod extends into the motor chamber; the
cam is provided on the output shaft, and has a driving part in a
circumferential direction thereof; the driving part abuts against
the actuation rod, and drives the actuation rod reciprocate along
an axis of the actuation rod between a first position and a second
position; the driving part has a first part and a second part,
wherein the shortest distance between the first part and the output
shaft is less than the shortest distance between the second part
and the output shaft; when the first part of the driving part abuts
against the actuation rod, the actuation rod is in the first
position so that the first chamber doesn't communicate with the
second chamber; when the second part of the driving part abuts
against the actuation rod, the actuation rod is in the second
position so that the first chamber communicates with the second
chamber; the control circuit board is electrically connected to the
motor to control the output shaft to rotate; the battery is
provided in the battery chamber, and is electrically connected to
the control circuit board.
2. The bicycle adjustable seatpost of claim 1, wherein an angle
between an axle center of the actuation rod and an axle center of
the output shaft is between 80.degree. and 100.degree..
3. The bicycle adjustable seatpost of claim 2, wherein the angle
between the axle center of the actuation rod and the axle center of
the output shaft is between 84.degree. and 96.degree..
4. The bicycle adjustable seatpost of claim 1, wherein the shortest
distance between the axle center of the actuation rod and the axle
center of the output shaft is between 0 mm and 15 mm.
5. The bicycle adjustable seatpost of claim 1, wherein the motor
chamber has a receiving opening, and the connecting base comprises
a first lid, and the control circuit board comprises a wireless
unit; the wireless unit comprises an antenna, and a side face
thereof which is disposed with the antenna faces the receiving
opening; an angle between an axis perpendicular to the side face
and an opening direction of the receiving opening is between
0.degree. and 15.degree.; the first lid covers the receiving
opening.
6. The bicycle adjustable seatpost of claim 5, wherein the motor
chamber communicates with the battery chamber; an accommodating
opening is located at a junction of the motor chamber and the
battery chamber; the motor chamber is located between the saddle
and the inner tube, and partly overlaps with a projection area of
the inner tube extending toward the saddle; the connecting base
comprises a second lid which covers the accommodating opening.
7. The bicycle adjustable seatpost of claim 6, wherein the
connecting base is made of metal materials; the first lid and the
second lid are made of non-metallic materials.
8. The bicycle adjustable seatpost of claim 1, wherein the control
circuit board comprises a sensor which has a sensing position; a
part of the cam can be driven by the output shaft to optionally be
close to or away from the sensing position, and thus a rotation
state of the cam can be detected.
9. The bicycle adjustable seatpost of claim 6, wherein the
connecting base has at least one through hole; the at least one
through hole communicates with the motor chamber, and is
corresponding to one of the receiving opening and the accommodating
opening; the connecting base comprises an adjusting seat and at
least one fixing member which is provided in the at least one
through hole, the adjusting seat, and the saddle.
10. The bicycle adjustable seatpost of claim 1, wherein the motor
chamber has a receiving opening; the connecting base comprises a
first lid, and the control circuit board comprises a wireless unit;
the wireless unit comprises an antenna which is provided on a side
face of the control circuit board away from the motor; the first
lid covers the receiving opening.
11. The bicycle adjustable seatpost of claim 1, wherein the motor
chamber has a receiving opening; the connecting base comprises a
first lid, which covers the receiving opening; the control circuit
board comprises a wireless unit which is provided to be
electrically connected to an antenna; the antenna is provided on an
inside surface of the first lid, and is located in the motor
chamber.
12. The bicycle adjustable seatpost of claim 6, wherein the second
lid comprises a charging part for charging the battery.
Description
BACKGROUND OF THE INVENTION
1. Technical Field
[0001] The present disclosure relates generally to an adjustable
bicycle seatpost, and more particularly to a wirelessly controlled
bicycle adjustable seatpost structure.
2. Description of Related Art
[0002] In many high-end bicycles, saddles are set on seatposts that
can be adjusted at any time, wherein the rider can press a switch
on the handlebar to control the length of the lifting seatpost for
adjusting the height of the saddle without getting off the
bicycle.
[0003] As shown in FIG. 1, a conventional bicycle adjustable
seatpost 1 includes a lever 2 pivotally connected to a seatpost 3
as a pivot, wherein the middle section of the lever 2 abuts against
an end of a valve rod 4, and the end section thereof abuts against
a cam block 5. Such lever structure controls the oil circuit in a
valve seat 6 to be opened or closed.
[0004] During adjusting the height of the saddle, the rider presses
the switch to start a motor 7, and thus a drive shaft 8 of the
motor 7 drives the cam block 5 to rotate a predetermined angle,
which makes the cam block 5 push the lever 2 upward. Next, the
lever 2 is deflected and pushes up the valve rod 4 so that the oil
circuit in the valve seat 6 is opened. In this way, riders can
adjust the position of the saddle through the linear displacement
of the seat post 9 relative to the seatpost 3.
[0005] When the saddle is adjusted to an appropriate height, the
rider releases the switch to make the drive shaft 8 of the motor 7
drive the cam block 5 to stop pushing the lever 2. At this time, a
recovery elastic (not shown) within the valve seat 6 pushes the
valve rod 4 down to close the oil circuit in the valve seat 6 so as
to complete the positioning of the seat post 9.
[0006] Although the lever, the valve rod, and the cam block of the
prior art form a labor-saving lever structure, the moving path of
the valve rod is too short, and the opened oil circuit in the valve
seat is limited, so that fluid resistance in the valve seat would
hinder the adjustment of the saddle. Moreover, if the oil circuit
has to be larger, the size of the cam block has to be increased to
lengthen the moving path of the valve rod. However, such change in
design increases the volume and weight of the overall seatpost,
which takes up more space. Therefore, the aforementioned problems
must be solved.
BRIEF SUMMARY OF THE INVENTION
[0007] In view of the above, the primary objective of the present
disclosure is to provide a bicycle adjustable seatpost which is
lightweight and is easy to use.
[0008] The present disclosure provides a bicycle adjustable
seatpost including a seatpost assembly, a connecting base, a
telescopic cylinder, and a control assembly. The seatpost assembly
includes an outer tube and an inner tube whose outer diameter is
smaller than an inner diameter of the outer tube, wherein the inner
tube is at least partially set in the outer tube and is movable
along an axial direction of the outer tube; the outer tube is
provided to be installed in a frame of a bicycle. The connecting
base is provided at an end of the inner tube to be connected to a
saddle of the bicycle, wherein the connecting base has a motor
chamber and a battery chamber; the motor chamber communicates with
the interior of the inner tube. The telescopic cylinder includes a
cylinder and a piston rod, wherein the cylinder is connected to the
outer tube and is filled with a fluid; the piston rod includes a
rod and a piston head connected to the rod; the rod is connected to
the inner tube, wherein one end of the rod extends into the
cylinder and is connected to the piston head; the piston head
divides the cylinder into a first chamber and a second chamber. The
control assembly includes a motor, an actuation rod, a cam, a
control circuit board, and a battery; the motor is provided in the
motor chamber, and includes an output shaft; the actuation rod is
provided in the seatpost assembly, and one end of the actuation rod
extends into the motor chamber, wherein an angle between an axle
center of the actuation rod and an axle center of the output shaft
is between 80.degree. and 100.degree.; the cam is provided on the
output shaft, and has a driving part in a circumferential direction
thereof; the driving part abuts against the actuation rod, and
drives the actuation rod reciprocate along an axis of the actuation
rod between a first position and a second position; the driving
part has a first part and a second part, wherein the shortest
distance between the first part and the output shaft is less than
the shortest distance between the second part and the output shaft;
when the first part of the driving part abuts against the actuation
rod, the actuation rod is in the first position so that the first
chamber doesn't communicate with the second chamber; when the
second part of the driving part abuts against the actuation rod,
the actuation rod is in the second position so that the first
chamber communicates with the second chamber; the control circuit
board is electrically connected to the motor to control the output
shaft to rotate; the battery is provided in the battery chamber,
and is electrically connected to the control circuit board.
[0009] From the above, the motor drives the cam to rotate and thus
drives the actuation rod to move along its axis, so as to block or
connect the first chamber and the second chamber in the cylinder,
and thus to adjust or fix the length of the seatpost assembly. In
addition, the design of the angle between the axle center of the
output shaft of the motor and the axle center of the actuation rod
conserve the output power of the motor. Furthermore, because of the
operational relationship between the cam and the actuation rod,
when the second part abuts against the actuation rod, the fluid
passage between the first chamber and the second chamber is
appropriate, which facilitates the flow of the fluid within the
chambers, so that the process of adjusting the length of the
seatpost assembly is much smoother.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0010] The present disclosure will be best understood by referring
to the following detailed description of some illustrative
embodiments in conjunction with the accompanying drawings, in
which
[0011] FIG. 1 is a schematic diagram of the conventional bicycle
lifting seatpost;
[0012] FIG. 2 is an application diagram of the bicycle adjustable
seatpost of the first preferred embodiment;
[0013] FIG. 3 is a partial sectional view of the bicycle adjustable
seatpost of the first preferred embodiment;
[0014] FIG. 4 is a partial exploded view of the control assembly of
the bicycle adjustable seatpost of the first preferred
embodiment;
[0015] FIG. 5 is a partial exploded view of the control assembly in
FIG. 4 from another aspect;
[0016] FIG. 6 is a top view of the bicycle adjustable seatpost of
the first preferred embodiment;
[0017] FIG. 7 is a partial sectional view along the 7-7 line in
FIG. 6;
[0018] FIG. 8 is a sectional view along the 8-8 line in FIG. 6;
[0019] FIG. 9 is a partial sectional view similar to FIG. 7,
showing that the second part of the driving part of the cam abuts
against the actuation rod;
[0020] FIG. 10 is a sectional view similar to FIG. 8, showing that
the inner tube moves down relative to the outer tube to shorten the
length of the overall seatpost assembly;
[0021] FIG. 11 is a partial exploded view of the bicycle adjustable
seatpost of the second preferred embodiment; and
[0022] FIG. 12 is a partial sectional view of the bicycle
adjustable seatpost of the second preferred embodiment.
DETAILED DESCRIPTION OF THE INVENTION
[0023] As shown in FIG. 2 and FIG. 3, a first embodiment of the
present disclosure, a bicycle adjustable seatpost 100, is provided,
wherein the bicycle adjustable seatpost 100 includes a seatpost
assembly 10, a telescopic cylinder 20, and a control assembly
30.
[0024] The seatpost assembly 10 includes an outer tube 12 and an
inner tube 14 whose outer diameter is smaller than the inner
diameter of the outer tube 12; the inner tube 14 passes through the
outer tube 12 and is movable along an axial direction of the outer
tube 12. The outer tube 12 is provided to be connected to a frame
of a bicycle (not shown). An upper end of the inner tube 14 is
located outside the outer tube 12, and is connected to a connecting
base 16 which is provided for connected to a saddle (not
shown).
[0025] The connecting base 16 has a motor chamber 161 and a battery
chamber 162, wherein the motor chamber 161 communicates with the
interior of the inner tube 14 and the battery chamber 162. The
motor chamber 161 is located between the saddle and the inner tube
14, and partly overlaps with a projection area of the inner tube 14
extending toward the saddle. Furthermore, the motor chamber 161
communicates with the outside with a receiving opening 16a and an
accommodating opening 16b, and the accommodating opening 16b is
located at the junction of the motor chamber 161 and the battery
chamber 162. The connecting base 16 further includes a first lid
163 and a second lid 164, wherein the first lid 163 is provides to
cover the receiving opening 16a, and the second lid 164 is provides
to cover the accommodating opening 16b. The abovementioned
connecting base 16 and the inner tube 14 are integral, which is
made of metal materials like the outer tube 12 to maintain the
rigidity of the seatpost assembly. On the other hand, the first lid
163 and the second lid 164 are made of non-metallic materials such
as plastic, silicone, or glass fiber composite.
[0026] In this embodiment, for realizing the combination of the
seatpost assembly 10 and the saddle of the bicycle, the connecting
base 16 has two through holes 16c, and further includes an
adjusting seat 165 and two fixing members 166. The two through
holes 16c communicate with the motor chamber 161; one of the
through holes 16c is corresponding to the receiving opening 16a,
and the other is corresponding to the accommodating opening 16b.
Each of the fixing members 166 passes through one of the through
holes 16c and the adjusting seat 165 in order, and is fixed to the
saddle. By such design, the saddle can be adjusted according to
personal needs to increase the flexibility of use. Moreover, the
number of the through holes and the fixing members are not limited
to the abovementioned number.
[0027] The telescopic cylinder 20 includes a cylinder 22 and a
piston rod 24. The cylinder 22 is fixedly installed in the outer
tube 12, and is filled with a fluid (not shown) which can be gas or
liquid. The piston rod 24 has a rod 242 and a piston head 244
connected to the rod 242. The rod 242 is fixedly located in the
inner tube 14; one end of the rod 242 extends into the cylinder 22,
and is connected to the piston head 244. Furthermore, the piston
head 244 divides the cylinder 22 into a first chamber A1 and a
second chamber A2. Whether the first chamber A1 communicates with
the second chamber A2 will affect the movement of the piston rod 24
relative to the cylinder 22, and then affect the movement of the
inner tube 14 relative to the outer tube 12.
[0028] The control assembly 30 is provided to connect or block the
first chamber A1 and the second chamber A2. As shown in FIG. 4 to
FIG. 8, the control assembly 30 includes a motor housing 31, a
motor 32, an actuation rod 33, a cam 34, a battery 35, and a
control circuit board 36. The motor housing 31 is installed in the
motor chamber 161 through the accommodating opening 16b, and has a
first opening 31a and a second opening 31b, which are opposite to
each other. The motor 32 is put in the motor housing 31 through the
first opening 31a, and an output shaft 321 of the motor 32 passes
through the second opening 31b.
[0029] The actuation rod 33 of the control assembly 30 is located
in the piston rod 24, and an upper end of the actuation rod 33
reaches into the motor chamber 161. The cam 34 is installed on the
output shaft 321, and includes a cam body 342 and a position
indicator 344, which are fixedly connected to each other; the cam
body 342 has a driving part 343 in a circumferential direction
thereof. The driving part 343 abuts against the actuation rod 33,
and drives the actuation rod 33 to reciprocate along its axis. The
driving part 343 has a first part 343a and a second part 343b. As
illustrated in FIG. 7 and FIG. 9, the shortest distance between the
first part 343a and an axle center of the output shaft 321 is less
than the shortest distance between the second part 343b and the
axle center of the output shaft 321. When the first part 343a of
the driving part 343 abuts against the actuation rod 33, the
actuation rod 33 is in a first position P1; when the second part
343b of the driving part 343 abuts against the actuation rod 33,
the actuation rod 33 is in a second position P2.
[0030] The battery 35 is installed in the battery chamber 162
through the accommodating opening 16b, and is electrically
connected to the control circuit board 36 (not shown) to supply
voltage.
[0031] The control circuit board 36 is installed on an outer
surface of the motor housing 31, and electrically connected to the
motor 32. The control circuit board 36 is provided to control the
rotation of the output shaft 321 of the motor 32, and includes a
wireless unit 362 and a photointerrupt sensor 364. The wireless
unit 362 is provided to be connected to a signal transmitter 41 of
a pressing switch 40 on the handlebar with signal, wherein the
signal transmitter 41 controls the action of the motor 32 through
wireless transmission. The wireless unit 362 includes an antenna
362a; a side face 362b of the wireless unit 362, which is disposed
with the antenna 362a, faces the receiving opening 16a. In
addition, an angle between an axis X1 perpendicular to the side
face 362b and an opening direction of the receiving opening 16a is
between 0.degree. and 15.degree.. In this embodiment, the angle
between the axial direction of the antenna 362a and the opening
direction of the receiving opening 16a is 0.degree., so that the
antenna 362a has better reception. Besides, the wireless unit can
be integrated with the control circuit board 36, and the antenna
362c is disposed on a side face 361 of the control circuit board 36
away from the motor 32, as shown in FIG. 4. Although the reception
effect in such design is not as good as that of the previous
embodiment, the configuration reduces the overall weight and
occupied space.
[0032] The photointerrupt sensor 364 of the control circuit board
36 is disposed on a side face of the control circuit board 36,
which is connected to the motor housing 31, and has a sensing
position 364a (as shown in FIG. 7). The position indicator 344 of
the cam 34 can be driven by the output shaft 321 to optionally be
close to or away from the sensing position 364a. Therefore, the
rotation state of the cam 34 can be detected so as to infer which
part of the driving part 343 abuts against the actuation rod
33.
[0033] As depicted in FIG. 7 to FIG. 10, when a rider presses the
pressing switch 40 on the handlebar, the signal transmitter 41 of
the pressing switch 40 sends a signal to the wireless unit 362.
Then, the control circuit board 36 reads the signal and controls
the output shaft 321 of the motor 32 to rotate towards a
predetermined turn R, and the position indicator 344 of the cam 34
will move toward the predetermined turn R into the sensing position
364a. Meanwhile, the driving part 343 of the cam 34 pushes the
actuation rod 33 to move from the first position P1 to the second
position P2. The cam 34 stops rotating when the position indicator
344 moves toward the predetermined turn R to leave the sensing
position 364a, at this time, the second part 343b of the driving
part 343 abuts against the actuation rod 33, wherein the actuation
rod 33 is in the second position P2 so that the first chamber A1
communicates with the second chamber A2. At the same time, piston
rod 24 can move up and down in the cylinder 22, which changes the
volume of the first chamber A1 and the second chamber A2, so that
the inner tube 14 moves along its axis relative to the outer tube
12 to achieve the purpose of adjusting the height of the
saddle.
[0034] When the saddle is adjusted to an appropriate height, the
rider releases the pressing switch 40, and the cam 34 moves in the
opposite direction of the predetermined turn R to enter the sensing
position 364a. Meanwhile, the driving part 343 of the cam 34 pushes
the actuation rod 33 to move from the second position P2 to the
first position P1. The cam 34 stops rotating when the position
indicator 344 moves in the opposite direction of the predetermined
turn R to leave the sensing position 364a, at this time, the first
part 343a of the driving part 343 abuts against the actuation rod
33, wherein the actuation rod 33 is in the first position P1 so
that the first chamber A1 doesn't communicate with the second
chamber A2 so as to fix the saddle. In other practical
applications, the mechanism of the photointerrupt sensor can be
changed according to requirements. Besides, components for sensing
the movement track of the cam are not limited to photointerrupt
sensors, and can be electromagnetic sensor.
[0035] Furthermore, an angle between an axle center of the
actuation rod 33 and the axle center of the output shaft 321 is
between 80.degree. and 100.degree.. Preferably, the angle between
the axle center of the actuation rod 33 and the axle center of the
output shaft 321 is between 84.degree. and 96.degree.. In this
embodiment, the angle between the axle center of the actuation rod
33 and the axle center of the output shaft 321 is 90.degree.. In
this way, the motor 32 can maintain better efficiency. Moreover,
considering the space design of the motor chamber 161, the shortest
distance between the axle center of the actuation rod 33 and the
axle center of the output shaft 321 is between 0 mm and 15 mm.
Therefore, said shortest distance can be slightly adjusted
according to different design changes without affecting the work
efficiency of the motor 32 and the amount of movement of the
actuation rod 33, which does not occupy too much volume.
[0036] As shown in FIG. 11 and FIG. 12, a second preferred
embodiment, a bicycle adjustable seatpost 500, is provided. The
wireless unit (not shown) of the bicycle adjustable seatpost 500 is
integrated within the control circuit board 501; an antenna 502
which is electrically connected to the wireless unit is installed
on an inside surface 503a of the first lid 503, and is located in
the motor chamber 504. Furthermore, the antenna 502 is electrically
connected to the control circuit board 501 through an electric wire
505. In this way, the antenna 502 has better reception. In
addition, the bicycle adjustable seatpost 500 includes a charging
part 506 which is installed on an inside surface 507a of the second
lid 507. The charging part 506 includes a receiving coil (not
shown) therein; the charging part 506 can sense an external
magnetic field through the receiving coil, and convert the sensed
magnetic field into an induced voltage, then transmit the induced
voltage to the battery 508.
[0037] As illustrated in FIG. 12, a wireless power supply device
600 is in touch with an outside surface of the second lid 507. The
wireless power supply device 600 includes a transmission induction
coil (not shown) which will generate a specific magnetic field that
makes the receiving coil of the charging part 506 magnetized, and
thus the magnetic energy is converted into electrical energy that
is transmitted to the battery 508 for charging. Moreover, the
wireless power supply device 600 includes a magnet or a magnetic
element made of magnetically attractable materials, and the
charging part 506 also includes a magnet or a magnetic element made
of magnetically attractable materials; said magnetically
attractable materials include but are not limited to nickel and
cobalt. The magnet or the magnetic element of the wireless power
supply device 600 is magnetically attracted to the magnet or the
magnetic element of the charging part 506, so that the wireless
power supply device 600 can be firmly attached to the charging part
506. However, in other practical applications, the charging part
can be electrically connected to a power supply device in the form
of male and female connection. For example, the plug of the power
supply device is inserted into the socket of the charging part to
perform electrical connection with metal contacts.
[0038] From the above, in the bicycle adjustable seatpost of the
present disclosure, the motor drives the cam to rotate and thus
drives the actuation rod to move along its axis, so as to block or
connect the first chamber and the second chamber in the cylinder,
and thus to adjust or fix the length of the seatpost assembly. In
addition, the design of both the angle and the distance between the
axle center of the output shaft of the motor and the axle center of
the actuation rod conserve the output power of the motor, and also
avoid excessive volume of the connecting base. Furthermore, with
the structural design between the cam and the actuation rod, when
the second part of the driving part abuts against the actuation
rod, the fluid passage between the first chamber and the second
chamber is appropriate, which facilitates the mutual flow of the
fluid between the first chamber and the second chamber, so that the
process of adjusting the length of the seatpost assembly is much
smoother.
[0039] It must be noted that the embodiments described above are
only preferred embodiments of the present disclosure. All
equivalent structures which employ the concepts disclosed in this
specification and the appended claims should fall within the scope
of the present disclosure.
* * * * *