GB2487229A - A telescopic air pressure damper spring - Google Patents
A telescopic air pressure damper spring Download PDFInfo
- Publication number
- GB2487229A GB2487229A GB1100652.5A GB201100652A GB2487229A GB 2487229 A GB2487229 A GB 2487229A GB 201100652 A GB201100652 A GB 201100652A GB 2487229 A GB2487229 A GB 2487229A
- Authority
- GB
- United Kingdom
- Prior art keywords
- air
- shoulder portion
- groove
- outer tube
- shoulder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 6
- 238000007599 discharging Methods 0.000 abstract description 3
- 230000002411 adverse Effects 0.000 abstract description 2
- 230000002708 enhancing effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/08—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other
- F16F7/09—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other in dampers of the cylinder-and-piston type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
- F16F9/0209—Telescopic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
- F16F9/0209—Telescopic
- F16F9/0218—Mono-tubular units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
- F16F9/0209—Telescopic
- F16F9/0227—Telescopic characterised by the piston construction
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Actuator (AREA)
- Fluid-Damping Devices (AREA)
Abstract
An air pressure buffer stick comprises: an outer tube 20 defining an inner moving space 22; a shaft 30; a connecting element 40 including first and second shoulder portions 41, 42; and a piston 50, the piston including a ring portion 51, a groove 52, a ring protrusion 53, a skirt portion54 and an air tank 56. With the structure design of the respective elements, the air-pressure buffer stick also includes an air discharging channel 55, so that when the shaft is pushed, it can avoid the occurrence of excessive pressure which can adversely affect the movement of the shaft besides producing a better buffer effect, achieving the objective that the shaft can be smoothly moved by a single pushing.
Description
AIR-PRESSURE BUFFER STICK
BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates to a buffer stick, and more particularly to an air-pressure buffer stick which can avoid uneven pushing travel.
Description of the Prior Art
An air-pressure bar is an assembly disposed between two objects moving relative to each other for reducing the relative velocity between the two objects, such as on door or a rear carriage cover of a car for reducing the closing speed to avoid damage caused by high velocity impact.
Referring to Fig. 1, a conventional air-pressure buffer stick essentially comprises an outer tube 11 and a shaft 12 which is axially inserted in the outer tube ii. A connecting element 13 which is connected to an end of the shaft 12 is provided with a piston ring 14. The piston ring 14 is provided with a ring portion 141 and a skirt portion 142. By such an arrangement, the ring portion 141 and the skirt portion 142 of the piston ring 14 can be propped open evenly by the connecting element 13, allowing the ring portion 141 and the skirt portion 142 of the piston ring 14 to produce a fine airtight space and a frictional force inside the outer tube 11, thus effectively enhancing the buffer effect of the air-pressure buffer stick. However, the above conventional air-pressure buffer stick still suffers from the following drawbacks in practice use: When the shaft 12 is pushed, the ring portion 141 and the skirt portion 142 of the piston ring 14 will flare to nib against the inner surface 111 of the outer tube 11 for producing the fine buffer effect, but the air inside the outer tube 11 will be gradually compressed at the same time. When the shaft 12 pushes the piston ring 14 to a position adjacent to the bottom of the outer tube 11, the pushing force of the shaft 12 is normally smaller the air pressure inside the outer tube 11, so that the shaft 12 cannot be pushed on smoothly. In such a case, the shaft 12 can be pushed on again until the ring portion 141 and the skirt portion 142 of the piston ring 14 restore to their original state to make the air pressure in the outer tube 11 smaller than the pushing force of the shaft 12, thus leading to unevenness of the pushing travel of the shaft 12.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide an air-pressure buffer stick the shaft of which can be smoothly moved by a single pushing.
Hence, to achieve the above objective, an air-pressure buffer stick in accordance with the present invention comprises: an outer tube, a shaft, a connecting element and a piston. The outer tube includes a moving space surrounded by an inner surface thereof a closed bottom end located at a first end of the moving space, an open top end located at a second end of the moving space. The shaft includes a first end located in the moving space and a second end which is located opposite the first end and outside the moving space. The connecting element is disposed on the first end of the shaft and includes a first shoulder portion, a second shoulder portion which is located farther from the second end of the shaft than the first shoulder portion, and a connecting portion which is connected to the first and the second shoulder portions. The first shoulder portion includes an outer peripheral surface which is spaced from the inner surface of the outer tube by a distance, a front end surface and a rear end surface. The front and the rear end surfaces are located opposite the second shoulder portion, and the rear end surface is located farther from the second shoulder portion than the front end surface. The second shoulder portion includes a side surface, and the side surface of the second shoulder portion is divided into a first arc portion and a second arc portion a radius of which is smaller than that of the first arc portion.
The piston is disposed in the moving space of the outer tube and includes a ring portion, a groove formed in the ring portion, a ring protrusion formed on an inner surface of the groove, a skirt portion abutting against the inner surface of the outer tube, and an air tank which is formed in the skirt portion and in communication with the groove. The groove of the piston is provided for insertion of the connecting element and has an end surface abutting against the front end surface of the first shoulder portion. Between the end surface of the groove and the rear end surface is defined a distance. The inner surface of the groove abuts against the first arc portion of the second shoulder portion and defines a distance with respect to the second arc portion, and the ring protrusion is spaced from the connecting portion and the second shoulder portion, respectively by a distance.
Preferably, a through hole is formed between the groove and the air tank.
Preferably, the connecting portion of the connecting element includes at least radially-recessed guide concave surface for passage of ait Preferably, the outer peripheral surface of the first shoulder portion of the connecting element is divided into a bigger arc portion and a smaller arc portion a radius of which is smaller than that of the bigger arc portion.
Preferably, the outer tube is provided with an end cover, and the second end of the shaft peiietrates the end cover.
Preferably, the skirt portion of the piston is provided with plural notches in communication with the air tank.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a partial enlarged view of a conventional air-pressure buffer stick; Fig. 2 is an exploded view of an air-pressure buffer stick in accordance with a first embodiment of the present invention; Fig. 3 is a cross-sectional view of the air-pressure buffer stick in accordance with the first embodiment of the present invention; Fig. 4 is a partial enlarged view of Fig. 3; Fig. 5 is a partial perspective view of the air-pressure buffer stick in accordance with the first embodiment of the present invention, showing the connecting element; Fig. 6 is a cross-sectional view of the air-pressure buffer stick in accordance with the first embodiment of the present invention, showing how the second shoulder portion of the connecting element is assembled to the piston; Fig. 7 is an operational view of the air-pressure buffer stick in accordance with the first embodiment of the present invention; Fig. 8 is a partial enlarged view of an air-pressure buffer stick in accordance with a second embodiment of the present invention, showing that the connecting portion of the connecting element includes one guide concave surface; Fig. 9 is a partial enlarged view of the air-pressure buffer stick in accordance with a second embodiment of the present invention, showing that the connecting portion of the connecting element includes two guide concave surfaces; Fig. 10 is a partial enlarged view of an air-pressure buffer stick in accordance with a third embodiment of the present invention; and Fig. 11 is a partial enlarged view of an air-pressure buffer stick in accordance with a fourth embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
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.
Referring to Figs. 2-6, an air-pressure buffer stick in accordance with a first embodiment of the present invention comprises an outer tube 20, a shaft 30, a connecting element 40 and a piston 50.
The outer tube 20 is a hollow tube and includes a moving space surrounded by an inner surface 21 of the outer tube 20, a closed bottom end 23 located at a first end of the moving space 22, and an open top end 24 located at a second end of the moving space 22. The top end 24 is provided with an end cover 25.
The shaft 30 includes a first end 31 located in the moving space 22 and a second end 32 which penetrates the end cover 25 and is opposite the first end 31 and located outside the moving space 22.
The connecting element 40 is disposed on the first end 31 of the shaft 30 and includes a first shoulder portion 41, a second shoulder portion 42 which is located farther from the second end 32 than the first shoulder portion 41, and a connecting portion 43 wl1ich is connected to the first aiid the second shoulder portions 41, 42. The first shoulder portion 41 includes an outer peripheral surface 411 which is spaced from the inner surface 21 of the outer tube 20 by a distance Hl, a front end surface 412 and a rear end surface 413. The front and the rear end surfaces 412, 413 are located opposite the second shoulder portion 42. The rear end surface 413 is located farther from the second shoulder portion 42 than the front end surface 412. The second shoulder portion 42 includes a side surface 421, and the side surface 421 is divided into a first arc portion 422 and a second arc portion 423 the radius of which is smaller than that of the first arc portion 422.
The piston 50 is disposed in the moving space 22 of the outer tube 20 and includes a ring portion 51, a groove 52 formed in the ring portion 51, a ring protrusion 53 formed on an inner surface 521 of the groove 52, a skirt portion 54 abutting against the inner surface 21 of the outer tube 20, and an air tank 56 which is formed in the skirt portion 54 and brought into communication with the groove 52 through a through hole 55. The groove 52 is provided for insertion of the connecting element 40 and has an en surface 522 abutting against the front end surface 412 of the first shoulder portion 41. Between the end surface 522 of the groove 52 and the rear end surface 413 is defined a distance H2. The inner surface 521 of the groove 52 abuts against the first arc portion 422 of the second shoulder portion 42 and defines a distance H3 with respect to the second arc portion 423. The ring protrusion 53 is spaced from the connecting portion 43 and the second shoulder portion 42, respectively by a distance H4, H5.
The aforementioned is the summary of the positional and structural relationship of the respective components of tl1e first embodiment in accordance with the present invention.
For a better understanding of the first embodiment in accordance with the present invention, its operation and function, reference should be made to the
following description:
Referring to Figs. 3 and 7, when the piston 50 is pushed to slide toward the bottom end 23 of the outer tube 20 by the shaft 30 through the connecting element 40, the ring portion Si and the skirt portion 54 of the piston 50 will flare and rub against the inner surface 21 of the outer tube 20, producing a fine buffer effect.
Meanwhile, the piston 50 will gradually compress the air between the piston 50 and the bottom end 23 of the outer tube 20, and part of the compressed air will be discharged from the air tank 56 in the skirt portion 54 of the piston 50 through the through hole 55, the groove 52 of the ring portion 51, a clearance between the second arc portion 423 of the second shoulder portion 42 and the inner surface 521 of the groove 52 (namely the distance 113), clearances between the ring protrusion 53, the connecting portion 43 of the connecting element 40 and the first shoulder portion 41 (namely the distances H4, H5), and a clearance between the first shoulder portion 41 and the inner surface 21 of the outer tube 20 (namely the distance HI). Hence, when the shaft 30 of the present invention is pushed, besides producing a fine buffer effect, it can also discharge the compressed air between the piston 50 and the outer tube 20 can be discharged in due time to avoid the occurrence of excessive air pressure in the outer tube 20 which will adversely affect the movement of the shaft 30, thus achieving the objective that the shaft 30 of the present invention can be smoothly moved by a single pushing.
Referring to Figs. 8 and 9, an air-pressure buffer stick in accordance with a second embodiment of the present invention also comprises an outer tube 20, a shaft 30, a connecting element 40, and a piston 50. Since the air-pressure buffer stick in accordance with the second embodiment of the present invention has the same components and function as the first embodiment, no further explanation is provided herein. The second embodiment and the first embodiment are different in that: the connecting portion 43 of the connecting element 40 in accordance with the second embodiment of the present invention includes at least one radially-recessed guide concave surface for passage of air for making discharging of the air much smoother.
The connecting portion 43 of the connecting element 40 includes one radially-recessed guide concave surface 431 as shown in Fig. 8 or two radially-recessed guide concave surfaces 432, 433 as shown Fig. 10.
Referring to Fig. 10, an air-pressure buffer stick in accordance with a third embodiment of the present invention also comprises an outer tube 20, a shaft 30, a connecting element 40, and a piston 50. Since the air-pressure buffer stick in accordance with the third embodiment of the present invention has the same components and function as the first embodiment, no further explanation is provided herein. The third embodiment and the first embodiment are different in that: the outer peripheral surface 411 of the first shoulder portion 41 of the connecting element 40 is divided into a bigger arc portion 414 and a smaller arc portion 415 the radius of which is smaller than that of the bigger arc portion 414, so that the distance between the smaller arc portion 415 and the inner surface 21 of the outer tube 20 is much bigger, making the discharging of air much smoothet Referring to Fig. 11, an air-pressure buffer stick in accordance with a fourth embodiment of the present invention also comprises an outer tube 20, a shaft 30, a connecting element 40, and a piston 50. Since the air-pressure buffer stick in accordance with the second embodiment of the present invention has the same components and function as the first embodiment, no further explanation is provided herein. The fourth embodiment and the first embodiment are different in that: the skirt portion 54 of the piston 50 is provided with plural notches 54! in communication with the air tank 56, so that when the piston 50 is pushed, the skirt portion 54 can assuredly flare and rub against the inner surface 21 of the outer tube 20, producing a better buffer effect.
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.
Claims (8)
- WHAT IS CLAIMED IS: 1. An air-pressure buffer stick comprising: an outer tube including a moving space surrounded by an inner surface thereof, a closed bottom end located at a first end of the moving space, an open top end located at a second end of the moving space; a shaft including a first end located in the moving space and a second end which is located opposite the first end and outside the moving space; a connecting element being disposed on the first end of the shaft and including a first shoulder portion, a second shoulder portion which is located farther from the second end of the shaft than the first shoulder portion, and a connecting portion which is connected to the first and the second shoulder portions, the first shoulder portion including an outer peripheral surface which is spaced from the inner surface of the outer tube by a distance, a front end surface and a rear end surface, the front and the rear end surfaces being located opposite the second shoulder portion, the rear end surface being located farther from the second shoulder portion than the front end surface, the second shoulder portion includes a side surface, and the side surface of the second shoulder portion being divided into a first arc portion and a second arc portion a radius of which is smaller than that of the first arc portion; and a piston being disposed in the moving space of the outer tube and including a ring portion, a groove formed in the ring portion, a ring protrusion formed on an inner surface of the groove, a skirt portion abutting against the inner surface of the outer tube, and an air tank which is formed in the skirt portion and in communication with the groove, the groove of the piston being provided for insertion of the connecting element and has an end surface abutting against the front end surface of the first shoulder portion, between the end surface of the groove and the rear end surface being defined a distance, the inner surface of the groove abutting against the first arc portion of the second shoulder portion and defining a distance with respect to the second arc portion, the ring protrusion being spaced froni the connecting portion and the second shoulder portion, respectively by a distance.
- 2. The air-pressure buffer stick as claimed in claim 1, wherein a through hole is formed between the groove and the air tank.
- 3. The air-pressure buffer stick as claimed in claim 1, wherein the connecting portion of the connecting element includes at least one radially-recessed guide concave surface for passage of air.
- 4. The air-pressure buffer stick as claimed in claim 1, wherein the outer peripheral surface of the first shoulder portion of the connecting element is divided into a bigger arc portion and a smaller arc portion a radius of which is smaller than that of the bigger arc portion.
- 5. The air-pressure buffer stick as claimed in claim 1, wherein the outer tube is provided with an end cover, and the second end of the shaft penetrates the end cover.
- 6. The air-pressure buffer stick as claimed in claim 1, wherein the skirt portion of the piston is provided with plural notches in communication with the air tank.
- 7. An air-pressure stick substantially as hereinbefore described with reference to and as shown in Figures 2 to 11 of the accompanying drawings.Amendments to the Claims have been filed as follows WHAT IS CLAIMED IS: 1. An air-pressure buffer stick comprising: an outer tube including a moving space surrounded by an inner surface thereof; a closed bottom end located at a first end of the moving space, an open top end located at a second end of the moving space; a shaft including a first end located in the moving space and a second end which is located opposite the first end and outside the moving space; a connecting element being disposed on the first end of the shaft and including a first shoulder portion, a second shoulder portion which is located farther from the second end of the shaft than the first shoulder portion, and a connecting portion which is connected to the first and the second shoulder portions, the first shoulder portion including an outer peripheral surface which is spaced from the inner surface of the outer tube by a distance, a front end surface and a rear end surface, the front and the rear end surfaces being located opposite the second shoulder portion, the rear end surface being located farther from the second shoulder portion than the front end surface, the second shoulder portion includes a side surface, and the side surface of the second shoulder portion being divided into a first arc portion and a ., second arc portion a radius of which is smaller than that of the first arc portion; and * ***t* * a piston being disposed in the moving space of the outer tube and including a S** U * a ring portion, a groove formed in the ring portion, a ring protrusion formed on an inner surface of the groove, a skirt portion abutting against the inner surface of the outer tube, and an air tank which is formed in the skirt portion and in communication with the groove, the groove of the piston being provided for insertion of the connecting element and has an end surface abutting against the front end surface of the first shoulder portion, between the end surface of the groove and the rear end surface being defined a distance, the inner surface of the groove abutting against the first arc portion of the second shoulder portion and defining a distance with respect to the second arc portion, the ring protrusion being spaced from the connecting portion and the second shoulder portion, respectively by a distance; and wherein the outer tube is provided with an end cover, and the second end of the shaft penetrates the end cover.2. The air-pressure buffer stick as claimed in claim 1, wherein a through hole is formed between the groove and the air tank.3. The air-pressure buffer stick as claimed in claim 1, wherein the connecting portion of the connecting clement includes at least one radially-recessed guide concave surface for passage of air.4. The air-pressure buffer stick as claimed in claim 1, wherein the outer peripheral surface of the first shoulder portion of the connecting element is divided into a bigger arc portion and a smaller arc portion a radius of which is smaller than that of the bigger arc portion.5. The air-pressure buffer stick as claimed in claim 1, wherein the skirt * **SS.* portion of the piston is provided with plural notches in communication with the air 5.* tank.6. An air-pressure stick substantially as hereinbefore described with reference to * :
- S. : and as shown in Figures 2 to 11 of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1100652.5A GB2487229B (en) | 2011-01-17 | 2011-01-17 | Air-pressure buffer stick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1100652.5A GB2487229B (en) | 2011-01-17 | 2011-01-17 | Air-pressure buffer stick |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB201100652D0 GB201100652D0 (en) | 2011-03-02 |
| GB2487229A true GB2487229A (en) | 2012-07-18 |
| GB2487229B GB2487229B (en) | 2012-12-05 |
Family
ID=43736466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1100652.5A Expired - Fee Related GB2487229B (en) | 2011-01-17 | 2011-01-17 | Air-pressure buffer stick |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2487229B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265820A (en) * | 2014-09-17 | 2015-01-07 | 苏州升德精密电气有限公司 | Buffer rod structure |
| US20220221018A1 (en) * | 2019-06-19 | 2022-07-14 | Piolax, Inc. | Air damper |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2769061A1 (en) * | 1997-10-01 | 1999-04-02 | Stabilus | Gas spring prop for motor vehicle hatch |
| DE20307522U1 (en) * | 2003-05-14 | 2004-09-16 | Alfit Ag | Device for damping and braking movement of cupboard doors etc has piston cylinder unit with a smaller diameter servo piston longitudinally displaceable in pressure chamber |
| DE202009005757U1 (en) * | 2009-03-06 | 2009-07-16 | Sun Chain Trading Co., Ltd. | Gas spring |
| DE202010008242U1 (en) * | 2010-08-06 | 2010-12-16 | Sun Chain Metal Industry Co., Ltd. | Pneumatic buffer cylinder |
-
2011
- 2011-01-17 GB GB1100652.5A patent/GB2487229B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2769061A1 (en) * | 1997-10-01 | 1999-04-02 | Stabilus | Gas spring prop for motor vehicle hatch |
| DE20307522U1 (en) * | 2003-05-14 | 2004-09-16 | Alfit Ag | Device for damping and braking movement of cupboard doors etc has piston cylinder unit with a smaller diameter servo piston longitudinally displaceable in pressure chamber |
| DE202009005757U1 (en) * | 2009-03-06 | 2009-07-16 | Sun Chain Trading Co., Ltd. | Gas spring |
| DE202010008242U1 (en) * | 2010-08-06 | 2010-12-16 | Sun Chain Metal Industry Co., Ltd. | Pneumatic buffer cylinder |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265820A (en) * | 2014-09-17 | 2015-01-07 | 苏州升德精密电气有限公司 | Buffer rod structure |
| CN104265820B (en) * | 2014-09-17 | 2016-05-18 | 苏州升德精密电气有限公司 | A kind of fender pile structure |
| US20220221018A1 (en) * | 2019-06-19 | 2022-07-14 | Piolax, Inc. | Air damper |
| US11841064B2 (en) * | 2019-06-19 | 2023-12-12 | Piolax, Inc. | Air damper |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201100652D0 (en) | 2011-03-02 |
| GB2487229B (en) | 2012-12-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20150117 |