U.S. patent application number 12/176528 was filed with the patent office on 2010-01-21 for shock absorber.
Invention is credited to Wei-Hua Chiang.
Application Number | 20100011681 12/176528 |
Document ID | / |
Family ID | 41529026 |
Filed Date | 2010-01-21 |
United States Patent
Application |
20100011681 |
Kind Code |
A1 |
Chiang; Wei-Hua |
January 21, 2010 |
Shock Absorber
Abstract
A shock absorber utilizes an internal passage design and
cooperates with at least one flow-restricting member and elastic
member to change the flow speed and displacement during the
extension and retraction of the shock absorber, so as to make the
extending and retracting speeds of the shock absorber different for
buffering the shake wave to the house, thus reducing the force
shaking the house in the earthquake.
Inventors: |
Chiang; Wei-Hua; (Hsinchu
County, TW) |
Correspondence
Address: |
Dr. BANGER SHIA
102 Lindencrest Ct.
Sugar Land
TX
77479-5201
US
|
Family ID: |
41529026 |
Appl. No.: |
12/176528 |
Filed: |
July 21, 2008 |
Current U.S.
Class: |
52/167.2 |
Current CPC
Class: |
E04H 9/0237 20200501;
E04H 9/02 20130101; F16F 9/062 20130101; E04H 9/028 20130101; F16F
9/516 20130101; F16F 9/348 20130101 |
Class at
Publication: |
52/167.2 |
International
Class: |
E04B 1/98 20060101
E04B001/98 |
Claims
1. A shock absorber comprising: a driving member including a driven
rod and a piston, the driven rod being formed at one end thereof
with an assembling portion, the piston being formed at one end
thereof with an assembling portion to be assembled with the
assembling portion of the driven rod, the piston being axially
formed with a flow-restricting passage; a first flow-restricting
member including a through hole and a flow-restricting portion, the
assembling portion of the piston being inserted through the through
hole of the first flow-restricting member, and the flow-restricting
member being positioned on the piston by the driven rod in such a
manner that the flow-restricting portion of the first
flow-restricting member cooperates with the flow-restricting
passage of the piston; a holder including an inner tube, a first
leak-proof member, a second leak-proof member, a positioning member
and an outer tube, the inner tube being used for insertion of the
piston of the driving member, the first leak-proof member being
axially defined with a through hole for insertion of the driven rod
of the driving member, one end of the first leak-proof member being
engaged with one end of the inner tube, an outer surface of the
first leak-proof member abutting against one end inner surface of
the outer tube, one end of the second leak-proof member being
engaged with the other end of the inner tube, an outer surface of
the second leak-proof member abutting against the other end inner
surface of the outer tube, the second leak-proof member including
at least one flow-restricting passage, one end of the
flow-restricting passage penetrating one end of the second
leak-proof member, and the other end of the flow-restricting
passage penetrating a side of the second leak-proof member, one end
of the positioning member being assembled with one end of the
second leak-proof member, the inner tube, the first leak-proof
member and the second leak-proof member defining a first inner
space, the first leak-proof member, the inner tube and the second
leak-proof member being disposed in the outer tube and defining a
second inner space, the flow-restricting passage of the second
leak-proof member communicating with the first inner space and the
second inner space, respectively; and a second flow-restricting
member including a through hole and a flow-restricting portion, the
through hole of the second flow-restricting member being provided
for insertion of the positioning member and assembled with the
second leak-proof member in such a manner that the flow-restricting
portion of the second flow-restricting member cooperates with the
flow-restricting passage of the second leak-proof member.
2. The shock absorber as claimed in claim 1 further comprising an
elastic member between the positioning member and the second
leak-proof member, the elastic member being mounted on the
positioning member, one end of the elastic member elastically
abutting against the positioning member, and the other end of the
elastic member elastically abutting against the second leak-proof
member.
3. The shock absorber as claimed in claim 1, wherein the assembling
portion of the driven rod of the driving member is in the form of
an inner threaded hole, the assembling portion of the piston of the
driving member is in the form of an outer threaded portion, around
an outer surface of the piston are defined at least two
spaced-apart grooves for accommodation of stopping members and
wear-resistance members, respectively; an inner surface of the
inner tube of the holder is in contact with the stopping members
and wear-resistance members of the piston of the driving member,
the through hole of the first leak-proof member is provided with a
bush, a stopping member and a guiding member, the first leak-proof
member of the holder is brought into contact with an outer surface
of the driven rod by the bush, stopping member and guiding member,
around the outer surface of the first leak-proof member is defined
at least one groove for accommodation of at least one stopping
member, around the outer surface of the second leak-proof member is
defined at least one groove for accommodation of at least one
stopping member, one end of the second leak-proof member is defined
with an assembling portion for assembling with one end of the
positioning member, the assembling portion of the second leak-proof
member is engaged with the inner tube; and the positioning member
is inserted through the second flow-restricting member and then
assembled with the assembling portion of the second leak-proof
member, so that the second flow-restricting member is positioned on
the second leak-proof member by the positioning member.
4. A shock absorber comprising: a driving member including a driven
rod and a piston, the driven rod being assembled with the piston,
the piston including a flow-restricting passage; a first
flow-restricting member being mounted on the piston and including a
flow-restricting portion, the flow-restricting member being
positioned on the piston by the driven rod in such a manner that
the flow-restricting portion of the first flow-restricting member
cooperates with the flow-restricting passage; a holder including an
inner tube, a first leak-proof member, a second leak-proof member,
a positioning member and an outer tube, the inner tube being used
for insertion of the piston of the driving member, the first
leak-proof member being axially defined with a through hole for
insertion of the driven rod of the driving member, one end of the
first leak-proof member being engaged with one end of the inner
tube, an outer surface of the first leak-proof member abutting
against one end inner surface of the outer tube, one end of the
second leak-proof member being engaged with the other end of the
inner tube, an outer surface of the second leak-proof member
abutting against the other end inner surface of the outer tube, the
second leak-proof member including at least one flow-restricting
passage, one end of the flow-restricting passage penetrating one
end of the second leak-proof member, and the other end of the
flow-restricting passage penetrating a side of the second
leak-proof member, one end of the positioning member being
assembled with one end of the second leak-proof member, the inner
tube, the first leak-proof member and the second leak-proof member
defining a first inner space, the first leak-proof member, the
inner tube and the second leak-proof member being disposed in the
outer tube and defining a second inner space, the flow-restricting
passage of the second leak-proof member communicating with the
first inner space and the second inner space, respectively; and a
second flow-restricting member being provided for insertion of the
positioning member and assembled with the second leak-proof member,
the second flow-restricting member including a flow-restricting
portion, between the positioning member and the second leak-proof
member is disposed an elastic member mounted on the positioning
member, one end of the elastic member elastically abutting against
the positioning member, and the other end of the elastic member
elastically abutting against the second leak-proof member, the
second flow-restricting member cooperates with the flow-restricting
passage of the second leak-proof member.
5. The shock absorber as claimed in claim 4, wherein the driven rod
is formed at one end thereof with an assembling portion, the piston
is formed at one end thereof with an assembling portion to be
assembled with the assembling portion of the driven rod, the piston
is axially formed with the flow-restricting passage.
6. The shock absorber as claimed in claim 4, wherein: the driven
rod of the driving member is in the form of an inner threaded hole,
the piston of the driving member is in the form of an outer
threaded portion, around an outer surface of the piston are defined
at least two spaced-apart grooves for accommodation of stopping
members and wear-resistance members, respectively; an inner surface
of the inner tube of the holder is in contact with the stopping
members and wear-resistance members of the piston of the driving
member, the through hole of the first leak-proof member is provided
with a bush, a stopping member and a guiding member, the first
leak-proof member of the holder is brought into contact with an
outer surface of the driven rod by the bush, stopping member and
guiding member, around the outer surface of the first leak-proof
member is defined at least one groove for accommodation of at least
one stopping member, around the outer surface of the second
leak-proof member is defined at least one groove for accommodation
of at least one stopping member, one end of the second leak-proof
member is defined with an assembling portion for assembling with
one end of the positioning member, the assembling portion of the
second leak-proof member is engaged with the inner tube; and the
positioning member is inserted through the second flow-restricting
member and then assembled with the assembling portion of the second
leak-proof member, so that the second flow-restricting member is
positioned on the second leak-proof member by the positioning
member.
7. A shock absorber comprising a driving member, a first
flow-restricting member, a second flow-restricting member and an
elastic member; wherein: the driving member includes a connecting
head, a driven rod and a piston, the connecting head is formed with
a radial restricting hole at one end thereof, and the other end of
the connecting head is axially defined with an assembling portion
in the form of an inner threaded hole, the driven rod is formed at
one end thereof with a first assembling portion which is in the
form of an outer threaded portion for screwing with the assembling
portion of the connecting head, and formed at the other end thereof
with a second assembling portion which is in the form of an inner
threaded hole to be matched with the piston, the piston is formed
at one end thereof with an assembling portion in the form of an
outer threaded portion to be screwed with the second assembling
portion of the driven rod, around an outer surface of the piston
are defined three spaced-apart grooves for accommodation of two
stopping members and a wear-resistance member, respectively, the
stopping members and the wear-resistance member are all O rings,
the piston is axially formed with an eccentric flow-restricting
passage; the first flow-restricting member is a flat piece being
axially defined with a central through hole for insertion of the
assembling portion of the piston, and at an outer edge of the first
flow-restricting member is formed a flow-restricting portion, When
the assembling portion of the piston is assembled with the second
assembling portion of the driven rod, the flow-restricting member
is pressed onto the piston by the driven rod in such a manner that
the flow-restricting portion of the first flow-restricting member
cooperates with the flow-restricting passage; the holder includes
an inner tube, a first leak-proof member, a second leak-proof
member, a positioning member and an outer tube, the inner tube is
used for axial insertion of the piston of the driving member, such
that the piston is in contact with an inner surface of the holder
via the stopping members and the wear-resistance, the first
leak-proof member is axially defined with a through hole in which
are disposed a bush, a stopping member and a guiding member,
respectively, which are all O rings, the through hole of the first
leak-proof member is provided for axial insertion of the driven rod
of the driving member in such a manner that the first leak-proof
member is brought into contact with the outer surface of the driven
rod by the bush, stopping member and guiding member, around an
outer surface of the first leak-proof member are defined two
spaced-apart grooves for accommodation of two stopping members,
respectively, which are O rings, one end of the first leak-proof
member is engaged with one end of the inner tube, and the outer
surface of the first leak-proof member abuts against one end inner
surface of the outer tube, the second leak-proof member is defined
in an outer surface thereof with two spaced-apart grooves for
accommodation of two stopping members which are all O rings, one
end of the second leak-proof member is defined with an assembling
portion which is cylinder-shaped, around the outer surface of the
second leak-proof member is formed a groove for accommodation of a
stopping member, the second leak-proof member is further provided
with two flow-restricting passages that are not connected to each
other, one end of each of the flow-restricting passages penetrates
one end of the second leak-proof member, and the other end of each
of the flow-restricting passages penetrates a side of the second
leak-proof member, the other end of the second leak-proof member is
axially defined with a connecting head which is formed with a
radial restricting hole, the positioning member has one end to be
axially assembled with the assembling portion of the second
leak-proof member, the assembling portion of the second leak-proof
member is engaged with the other end of the inner tube, and the
outer surface of the second leak-proof member abuts against the
other end inner surface of the outer tube, both ends of the inner
tube are engaged with the first leak-proof member and the second
leak-proof member to define a first inner pace, subsequently, the
first leak-proof member, the inner tube and the second leak-proof
member are placed into the outer tube, the outer surface of the
first leak-proof member is in contact with the one end inner
surface of the outer tube via the stopping members, and the outer
surface of the second leak-proof member is in contact with the
other end inner surface of the outer tube via the stopping members
in such a manner that a second inner space is defined between the
inner tube and the outer tube, one end of each of the
flow-restricting passages of the second leak-proof member
communicates with first inner space, and the other end of each of
the flow-restricting passages of the second leak-proof member
communicates with the second inner space; the second
flow-restricting member is a flat piece being axially defined with
a central through hole for insertion of the positioning member, and
at an outer surface of the second flow-restricting member is formed
with a flow-restricting portion, when the positioning member is
inserted through the through hole of the second flow-restricting
member and then assembled with the assembling portion of the second
leak-proof member, the second flow-restricting member is pressed
onto the second leak-proof member by the positioning member in such
a manner that the flow-restricting portion of the second
flow-restricting member cooperates with the flow-restricting
passage of the second leak-proof member; and the elastic member is
a spring mounted on the positioning member, one end of the elastic
member elastically abuts against the positioning member, and the
other end of the elastic member elastically abuts against the
second leak-proof member;
8. The shock absorber as claimed in claim 7, wherein the piston is
provided with an elastic member at each of two ends thereof in the
first inner space, the elastic members of the piston are provided
for retaining and positioning the shock absorber.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a shock absorber, and more
particularly to a shock absorber which can defeat the inertia to
slow the energy compression speed and increase the energy release
speed.
[0003] 2. Description of the Prior Art
[0004] Taiwan is located at the active plate boundary between the
Eurasian plate and the Philippine Sea plate. The huge pressure
generated by the collision between the two plates will cause
earthquake, and different quake-hit areas in the same earthquake
will have different situations.
[0005] So far, Taiwan has certain knowledge about earthquake, but
is still unable to forecast precisely where and when the quake
occurs is going to happen. Living in such an unstable geological
environment, we can't stop an earthquake, but we can do something
to reduce the damage caused by it.
[0006] The owner of this application, with many years of technology
and experiences in the field of shock absorber, has developed a
shock absorber which can solve the above problem.
SUMMARY OF THE INVENTION
[0007] The primary objective of the present invention is to provide
a shock absorber, which can defeat the inertia displacement of the
shock absorber to slow the retracting speed to absorb energy and
increase the extending speed to release the energy.
[0008] In order to achieve the above objective, the shock absorber
in accordance with the present invention comprises a driving
member, a first flow-restricting member, a holder and a second
flow-restricting member.
[0009] the driving member includes a driven rod and a piston, one
end of the driven rod is assembled with one end of the piston, the
piston is formed with a flow-restricting passage. The first
flow-restricting member includes a through hole for insertion of
the piston, and a flow-restricting portion for cooperating with the
flow-restricting passage of the piston. The holder includes an
inner tube, a first leak-proof member, a second leak-proof member,
a positioning member and an outer tube, the inner tube is used for
insertion of the piston of the driving member, both ends of the
inner tube are engaged with the first leak-proof member and the
second leak-proof member to define a first inner space, the first
leak-proof member is provided for insertion of the driven rod of
the driving member, the second leak-proof member includes at least
one flow-restricting passage, one end of the flow-restricting
passage penetrates one end of the second leak-proof member, and the
other end of the flow-restricting passage penetrates a side of the
second leak-proof member. One end of the positioning member is
assembled with one end of the second leak-proof member. The first
leak-proof member, the inner tube and the second leak-proof member
are disposed in the outer tube and define a second inner space. The
flow-restricting passage of the second leak-proof member
communicates with the first inner space and the second inner space,
respectively. The second flow-restricting member includes a through
hole and a flow-restricting portion, the through hole is provided
for insertion of the positioning member and assembled with the
leak-proof member, and the flow-restricting portion of the second
flow-restricting member is provided for cooperating with the second
leak-proof member.
[0010] To summarize, the shock absorber in accordance with the
present invention has the following advantages:
[0011] The buffer liquid in the shock absorber utilizes the
flow-restricting passage, the flow-restricting portion of the first
flow-restricting member, the flow-restricting passage of the second
leak-proof member and the flow-restricting portion of the second
flow-restricting member to cooperate with the first inner space and
the second inner space to change the flow speed, respectively to
change the flow speed by ways of changing the inner flow passages;
and under the condition that the second flow-restricting is
restricted by the positioning member, the distance between the
second flow-restricting member and the second leak-proof member can
be changed with the movement of the piston, when the shock absorber
retracts, the speed at which the buffer liquid flows from the first
inner space to the second inner space will decrease, when the shock
absorber extends, the speed at which the buffer liquid flows from
the second inner space to the first inner space will increase, so
that the retracting speed of the shock absorber is smaller than the
extending speed of the shock absorber. The shock absorber retracts
more slowly to absorb energy, and the shock absorber extends more
quickly to release energy.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] FIG. 1 is an exploded view of a shock absorber in accordance
with the present invention;
[0013] FIG. 2 is a first cross-sectional view of the shock absorber
in accordance with the present invention;
[0014] FIG. 3 is a second cross-sectional view of the shock
absorber in accordance with the present invention;
[0015] FIG. 4 illustrates how the shock absorber in accordance with
the present invention is used;
[0016] FIG. 5 illustrates the state of the shock absorber in
accordance with the present invention before the earthquake
occurs;
[0017] FIG. 6 illustrates the state of the shock absorber in
accordance with the present invention after the earthquake occurs;
and
[0018] FIG. 7 illustrates that the shock absorber in accordance
with the present invention is assembled with springs.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0019] The present invention will be clearer from the following
description when viewed together with the accompanying drawings,
which show, for purpose of illustrations only, the preferred
embodiment in accordance with the present invention.
[0020] Referring to FIGS. 1-3, a shock absorber in accordance with
the present invention comprises: a driving member 10, a first
flow-restricting member 20, a holder 30, a second flow-restricting
member 40 and an elastic member 50.
[0021] The driving member 10 includes a connecting head 11, a
driven rod 12 and a piston 13.
[0022] The connecting head 11 is formed with a radial restricting
hole 111 at one end thereof, and the other end of the connecting
head 11 is axially defined with an assembling portion 112 in the
form of an inner threaded hole.
[0023] The driven rod 12 is formed at one end thereof with a first
assembling portion 121 which is in the form of an outer threaded
portion for screwing with the assembling portion 112 of the
connecting head 11, and formed at the other end thereof with a
second assembling portion 122 which is in the form of an inner
threaded hole to be matched with the piston 13.
[0024] The piston 13 has one end formed with an assembling portion
131 in the form of an outer threaded portion to be screwed with the
second assembling portion 122 of the driven rod 12. Around the
outer surface of the piston 13 are defined three spaced-apart
grooves 132 for accommodation of two stopping members 133 and a
wear-resistance member 134, respectively. The stopping members 133
and the wear-resistance member 134 are all O rings. The piston 13
is axially formed with an eccentric flow-restricting passage
135.
[0025] The first flow-restricting member 20 is a flat piece being
axially defined with a central through hole 21 for insertion of the
assembling portion 131 of the piston 13, and at the outer edge of
the first flow-restricting member 20 is formed a flow-restricting
portion 22. When the assembling portion 131 of the piston 13 is
assembled with the second assembling portion 122 of the driven rod
12, the flow-restricting member 20 is pressed onto the piston 13 by
the driven rod 12 in such a manner that the flow-restricting
portion 22 of the first flow-restricting member 20 cooperates with
the flow-restricting passage 135.
[0026] The holder 30 includes an inner tube 31, a first leak-proof
member 32, a second leak-proof member 33, a positioning member 34
and an outer tube 35.
[0027] The inner tube 31 is used for axial insertion of the piston
13 of the driving member 10, such that the piston 13 is in contact
with the inner surface 31 of the holder 30 via the stopping members
133 and the wear-resistance 134.
[0028] The first leak-proof member 32 is axially defined with a
through hole 321 in which are disposed a bush 322, a stopping
member 323 and a guiding member 324, respectively, which are all O
rings. The through hole 321 of the first leak-proof member 32 is
provided for axial insertion of the driven rod 12 of the driving
member 10 in such a manner that the first leak-proof member 32 is
brought into contact with the outer surface of the driven rod 12 by
the bush 322, stopping member 323 and guiding member 324. Around
the outer surface of the first leak-proof member 32 are defined two
spaced-apart grooves 325 for accommodation of two stopping members
326, respectively, which are O rings. One end of the first
leak-proof member 32 is engaged with one end of the inner tube 31,
and the outer surface of the first leak-proof member 32 abuts
against one end inner surface of the outer tube 35.
[0029] The second leak-proof member 33 is defined in the outer
surface thereof with two spaced-apart grooves 331 for accommodation
of two stopping members 332 which are all O rings. One end of the
second leak-proof member 33 is defined with an assembling portion
333 which is cylinder-shaped. Around the outer surface of the
second leak-proof member 33 is formed a groove 334 for
accommodation of a stopping member 335. The second leak-proof
member 33 is further provided with two flow-restricting passages
336 that are not connected to each other. One end of each of the
flow-restricting passages 336 penetrates one end of the second
leak-proof member 33, and the other end of each of the
flow-restricting passages 336 penetrates a side of the second
leak-proof member 33. The other end of the second leak-proof member
33 is axially defined with a connecting head 337 which is formed
with a radial restricting hole 338.
[0030] The positioning member 34 has one end to be axially
assembled with the assembling portion 333 of the second leak-proof
member 33. The assembling portion 333 of the second leak-proof
member 33 is engaged with the other end of the inner tube 31, and
the outer surface of the second leak-proof member 33 abuts against
the other end inner surface of the outer tube 35.
[0031] Both ends of the inner tube 31 are engaged with the first
leak-proof member 32 and the second leak-proof member 33 to define
a first inner pace A. Subsequently, the first leak-proof member 32,
the inner tube 31 and the second leak-proof member 33 are placed
into the outer tube 35. The outer surface of the first leak-proof
member 32 is in contact with one end inner surface of the outer
tube 32 via the stopping members 326, and the outer surface of the
second leak-proof member 33 is in contact with the other end inner
surface of the outer tube 35 via the stopping members 332 in such a
manner that a second inner space B is defined between the inner
tube 31 and the outer tube 35. In addition, one end of each of the
flow-restricting passages 336 of the second leak-proof member 33
communicates with first inner space A, and the other end of each of
the flow-restricting passages 336 of the second leak-proof member
33 communicates with the second inner space B.
[0032] The second flow-restricting member 40 is a flat piece being
axially defined with a central through hole 41 for insertion of the
positioning member 34, and at the outer surface of the second
flow-restricting member 40 is formed with a flow-restricting
portion 42. When the positioning member 34 is inserted through the
through hole 41 of the second flow-restricting member 40 and then
assembled with the assembling portion 333 of the second leak-proof
member 33, the second flow-restricting member 41 is pressed onto
the second leak-proof member 33 by the positioning member 34 in
such a manner that the flow-restricting portion 42 of the second
flow-restricting member 40 cooperates the flow-restricting passage
336 of the second leak-proof member 33.
[0033] The elastic member 50 is a spring mounted on the positioning
member 34. One end of the elastic member 50 elastically abuts
against the positioning member 34, and the other end of the elastic
member 50 elastically abuts against the second leak-proof member
33.
[0034] The first inner space A and the second inner space B of the
holder 30 are both pre-filled with an appropriate amount of buffer
liquid. The restricting hole 111 of the connecting head 11 of the
driving member 10 and the restricting hole 338 of the connecting
head 337 of the second leak-proof member 33 respectively cooperate
with positioning pieces and screws to position the shock absorber
in accordance with the present invention between two beams (as
shown in FIGS. 4 and 5), so that when the beams are subjected to
external force to shake (please refer to FIG. 6), the driving
member 10 and the holder 30 of the shock absorber in accordance
with the present invention will extend and retract axially.
[0035] When the shock absorber in accordance with the present
invention retracts, the driving member 10 will utilize the driven
rod 12 to drive the piston 13 to move axially from the first
leak-proof member 32 to the second leak-proof member 33 in the
inner tube 31, so that the buffer liquid between the piston 13 and
the second leak-proof member 33 will be compressed to press the
second flow-restricting member 40 to abut against assembling
portion 333 of the second leak-proof member 33 closely. As a
result, the speed at which the buffer liquid in the first inner
space A flow to the second inner space B will decrease.
[0036] While the piston 13 moves forwards, under the condition that
the first inner space A is fixed, the buffer liquid in the space
defined between the piston 13 and the second leak-proof member 33
will move toward the space defined between the first leak-proof
member 32 and the piston 13. The flow of the buffer liquid will be
restricted by the flow-restricting passage 135 of the piston 13 and
the flow-restricting portion 22 of the first flow-restricting
member 20, and the flow speed of the buffer liquid can be changed
by changing the inner flow passage space.
[0037] When the shock absorber in accordance with the present
invention extends, the driving member 10 will utilize the driven
rod 12 to drive the piston 13 to move axially from the second
leak-proof member 33 to the first leak-proof member 32 in the inner
tube 31, and the buffer liquid between the piston 13 and the first
leak-proof member 32 will be compressed by the piston, so that the
second flow-restricting member 40 will not be pressed to abut
against the assembling portion 333 of the second leak-proof member
33 closely. As a result, the speed at which the buffer liquid in
the second inner space B flow to the second inner space B through
the flow-restricting passage 336 of the second leak-proof member 33
will increase.
[0038] While the piston 13 moves forwards, under the condition that
the first inner space A is fixed, the buffer liquid in the space
defined between the piston 13 and the first leak-proof member 32
will move toward the space defined between the second leak-proof
member 33 and the piston 13. The flow of the buffer liquid will be
restricted by the flow-restricting passage 135 of the piston 13 and
the flow-restricting portion 22 of the first flow-restricting
member 20. By such arrangements, the flow-restricting passage 135
of the piston 13 and the flow-restricting portion 22 of the first
flow-restricting member 20 can provide such a flow speed that the
inertia displacement of the shock absorber can be defeated to
decrease the retracting speed of the shock absorber to absorb
energy and increase the extending speed of the shock absorber to
release the energy. The flow speed of the buffer liquid can be
changed by changing the inner flow passage space.
[0039] Referring to FIG. 7, the piston 13 is provided with an
elastic member 60 at each of two ends thereof in the first inner
space A. The elastic members 60 are provided to retain and position
the shock absorber for preventing the shock absorber from being
shaken to deform uncontrollably.
[0040] The above shock absorber is applicable to houses,
motorcycles, cars or mechanical equipments.
[0041] While we have shown and described various embodiments in
accordance with the present invention, it is clear to those skilled
in the art that further embodiments may be made without departing
from the scope of the present invention.
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