US20210188204A1 - Displacement resistance device for a vehicle crush-can assembly and crush-can yield adjustment method - Google Patents
Displacement resistance device for a vehicle crush-can assembly and crush-can yield adjustment method Download PDFInfo
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- US20210188204A1 US20210188204A1 US16/718,806 US201916718806A US2021188204A1 US 20210188204 A1 US20210188204 A1 US 20210188204A1 US 201916718806 A US201916718806 A US 201916718806A US 2021188204 A1 US2021188204 A1 US 2021188204A1
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- United States
- Prior art keywords
- crush
- chamber
- assembly
- pinion
- liquid
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- 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.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/24—Arrangements for mounting bumpers on vehicles
- B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
- B60R19/32—Fluid shock absorbers, e.g. with coaxial coil springs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
- B60R19/20—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact containing mainly gas or liquid, e.g. inflatable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/24—Arrangements for mounting bumpers on vehicles
- B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
- B60R19/34—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means destroyed upon impact, e.g. one-shot type
Abstract
A vehicle system includes, among other things, a crush-can assembly that is disposed between a bumper member and a vehicle frame. The crush-can assembly is configured to yield when the bumper member is moved closer to the vehicle frame. The system further includes a displacement resistance device that has a chamber that holds a liquid-nano material. The liquid-nano material is compressed within the chamber to resist a movement of the bumper member toward the vehicle frame.
Description
- This disclosure relates generally to a crush-can assembly for a vehicle and, more particularly, to a displacement resistance device used in connection with the crush-can assembly.
- Motor vehicles are known to include front and rear bumpers, which are structures that are attached to or integrated with the front and rear ends of the vehicle, respectively, and configured to absorb loads. Crush-can assemblies can couple the bumpers to the vehicle frame. The crush-can assemblies can absorb some of the loads applied to the bumper.
- A vehicle system according to an exemplary aspect of the present disclosure includes, among other things, a crush-can assembly that is disposed between a bumper member and a vehicle frame. The crush-can assembly is configured to yield when the bumper member is moved closer to the vehicle frame. The system further includes a displacement resistance device that has a chamber that holds a liquid-nano material. The liquid-nano material is compressed within the chamber to resist a movement of the bumper member toward the vehicle frame.
- In another example of the foregoing system, the crush-can assembly has an interior. The chamber is disposed entirely outside the interior.
- In another example of any of the foregoing systems, no portion of the chamber is disposed between the bumper member and the vehicle frame.
- In another example of any of the foregoing systems, the displacement resistance device includes a rack and pinion. The rack is configured to urge the pinion to rotate when the bumper member is urged toward the vehicle frame by a force applied to the bumper member. The liquid in the chamber resists a rotation of the pinion to increase the force required to move the bumper member toward the vehicle frame.
- Another example of any of the foregoing systems includes a bracket that is secured to the crush-can assembly. The chamber is held by the bracket.
- In another example of any of the foregoing systems, the pinion has a first end held by the bracket and a second end that extends into the chamber.
- In another example of any of the foregoing systems, the second end of the pinion threadably engages the chamber.
- In another example of any of the foregoing systems, the rack includes a portion that extends into an interior of the crush-can. The pinion and the chamber are disposed entirely outside the interior of the crush-can.
- In another example of any of the foregoing systems, the chamber and the pinion are aft the crush-can assembly relative to a general orientation of a vehicle that has the crush-can assembly.
- In another example of any of the foregoing systems, the liquid-nano material includes a plurality of nanoporous particles that are suspended within a chemically inert liquid.
- In another example of any of the foregoing systems, the plurality of nanoporous particles are silicon and the chemically inert liquid is oil or water.
- A crush-can yield adjustment method according to another exemplary aspect of the present disclosure includes, among other things, holding a liquid-nano material within a chamber that is separate from a crush-can assembly. The crush-can assembly is disposed between a bumper member and a vehicle frame. The crush-can assembly is configured to yield when the bumper member is moved closer to the vehicle frame. The method further includes resisting movement of the bumper member toward the vehicle frame using the liquid-nano material.
- In another example of the foregoing method, the crush-can assembly has an interior. The chamber is disposed entirely outside the interior.
- In another example of any of the foregoing methods, the method further includes applying a force to the bumper member. The method further includes using a rack to resist movement of the bumper member toward the vehicle frame in response to the force, using a pinion to resist movement of the rack, and using the liquid-nano material to resist rotation of the pinion.
- In another example of any of the foregoing methods, the rack extends into an interior of the crush-can assembly. The chamber and the pinion are aft the crush-can assembly relative to a general orientation of a vehicle that has the crush-can assembly.
- In another example of any of the foregoing methods, the liquid-nano material includes a plurality of nanoporous particles suspended within a chemically inert liquid.
- In another example of any of the foregoing methods, the plurality of nano-porous particles are silicon and the chemically inert liquid is oil or water.
- The embodiments, examples and alternatives of the preceding paragraphs, the claims, or the following description and drawings, including any of their various aspects or respective individual features, may be taken independently or in any combination. Features described in connection with one embodiment are applicable to all embodiments, unless such features are incompatible.
- The various features and advantages of the disclosed examples will become apparent to those skilled in the art from the detailed description. The figures that accompany the detailed description can be briefly described as follows:
-
FIG. 1 illustrates a perspective view of a vehicle having a front bumper and a rear bumper. -
FIG. 2 illustrates an expanded view of the front bumper and a bumper support system of the vehicle ofFIG. 1 . -
FIG. 3 illustrates a rear view of the bumper support system ofFIG. 2 . -
FIG. 4 illustrates a close up view of an area of the bumper support system ofFIG. 3 with a partially section view of a crush-can assembly of the bumper support system. -
FIG. 5 illustrates a displacement resistance device utilized with the crush-can assembly ofFIG. 4 . -
FIG. 6 illustrates an expanded view of selected portions of the displacement resistance device ofFIG. 5 . -
FIG. 7 illustrates a section view of a chamber of the displacement resistance device. -
FIG. 8 graphically illustrates a plot of force versus crush distance for a first crush-can that is not utilizing a displacement resistance device, a second crush-can that is utilizing a displacement resistance device that provides a first resistance, and a third crush-can that is utilizing a displacement resistance device that provides a second resistance. - This disclosure relates generally to vehicle crush-can assemblies that utilize displacement resistance devices having liquid-nano material. The displacement resistance devices increase an amount of force that must be applied to a bumper in order to cause the crush-can assemblies to yield.
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FIG. 1 illustrates amotor vehicle 10, which, in this example, is a pickup truck. Thevehicle 10 includes afront bumper 12 and arear bumper 14. -
FIG. 2 illustrates an expanded view of thefront bumper 12 and abumper support system 16 that supports thefront bumper 12. Thebumper support system 16 includes abumper beam 18, and crush-can assemblies 20 disposed between thebumper beam 18 and portions of avehicle frame 24. Crush-can assemblies could be used elsewhere on thevehicle 10, such as in connection with therear bumper 14. - When installed within the
vehicle 10, thefront bumper 12 is mounted to thebumper beam 18. The crush-can assemblies 20, one on a passenger side and one on a driver side of thevehicle 10, secure thebumper beam 18 to portions of thevehicle frame 24. When a force F, such as an impact load, is applied to thefront bumper 12, the crush-can assemblies 20 manage energy distribution associated with the force. - Referring now to
FIGS. 3-6 , if the force F exceeds a threshold force level, one or both of the crush-can assemblies 20 can yield permitting movement of thebumper beam 18 closer to thevehicle frame 24. As the crush-can assemblies 20 yield, a distance X between thebumper beam 18 and thevehicle frame 24 decreases. - The crush-can assemblies 20, the exemplary embodiment, are frustoconcial. The crush-can
assemblies 20 can be formed from metal, for example. - The threshold force level that is required to cause the crush-can
assemblies 20 to yield can vary based on a design of the crush-canassemblies 20. For example, a thickness of the metal could be increased if a higher threshold force level is desired. The threshold force level that is required to cause the crush-canassemblies 20 to yield can also vary based on, among other things, a weight of thevehicle 10 and an architecture of thevehicle 10. - While the crush-can
assemblies 20 can be designed for specific vehicle architectures, this increases part complexity as a specific type of crush-can assembly may be required for each vehicle architecture. As can be appreciated, utilizing a common crush-can assembly design across multiple vehicle platforms can help to reduce part complexity. - Accordingly, the crush-can
assemblies 20 of the exemplary embodiment are each utilized in connection with adisplacement resistance device 28. Thedisplacement resistance device 28 can resist movement of thebumper beam 18 toward thevehicle frame 24 in response to the force F, which increases the threshold force level that must be reached before the associated crush-can assembly 20 yields. Resisting movement of thebumper beam 18 toward thevehicle frame 24 with thedisplacement resistance device 28 increases the threshold force level that must be reached to cause the crush-can assembly 20 to yield. The increased threshold force level is needed in order to overcome the resistance provided by thedisplacement resistance device 28. The resistance provided by thedisplacement resistance device 28 is relatively easy to adjust. - The
displacement resistance device 28, in the example embodiment, has a rack and pinion system that is used to resist displacement. The rack and pinion system includes arack 36, apinion 40, and achamber 44 that holds a liquid-nano material 50 (FIG. 7 ). - The
rack 36 extends from thepinion 40 to a rear of thebumper beam 18. When the force F is applied, the force F urges therack 36 in the direction D. Teeth of therack 36 are engaged with teeth of thepinion 40. Thus, movement of therack 36 in the direction D is resisted by thepinion 40. - In order for the
rack 36 to move in the direction R, therack 36 needs to rotate thepinion 40 in the direction R. Rotation of thepinion 40 in the direction R requires, in the exemplary embodiment, thechamber 44 to translate relative to thepinion 40 along a rotational axis of thepinion 40 such that thepinion 40 extends further into thechamber 44. Relative movement of thepinion 40 into thechamber 44 reduces a volume of thechamber 44 thereby requiring compression of the liquid-nano material 50 held within thechamber 44. - The threshold force level required to move the
rack 36 in the direction R is thus directly related to the compression resistance provided by the liquid-nano material 50 within thechamber 44. In the exemplary embodiment, thebumper beam 18 does not move closer to thevehicle frame 24 to cause the crush-can assembly 20 to yield until therack 36 is moved in the direction R. The threshold force level required to cause the crush-can assembly 20 to yield is thus also directly related to the compression resistance provided by the liquid-nano material 50 within thechamber 44. If the liquid-nano material 50 prevents rotation of thepinion 40 relative to thechamber 44, linear movement of therack 36 in the direction D is prevented. - The liquid-
nano material 50, in the exemplary embodiment, includes a plurality ofnanoporous particles 54 suspended within a liquid 58. Thenanoporous particles 54 can be silicon, and the liquid 58 can be a chemically inert liquid, such as oil or water. Exemplary nanoporous particles can remain hydrophobic at certain pressures, and then take in liquid in response to an increased pressure. Thus, within thechamber 44, the liquid-nano material 50 can limit rotation of thepinion 40 relative to thechamber 44 until the pressure on the liquid-nano material 50 exceeds a threshold pressure. After which, thenanoporous particles 54 take in liquid to effectively reduce a volume of the liquid-nano material 50 within thechamber 44. The reduced volume permits rotation of thepinion 40 relative to thechamber 44 such that thepinion 40 can extend further into thechamber 44. In some examples, the threshold pressure can be designed to vary from 0.5 MPa to 50 MPa while volume change can be as high as 80 percent. - The compression resistance provided by the liquid-
nano material 50 within thechamber 44 can be altered by adjusting a mixture of thenanoporous particles 54 and the liquid 58. By adjusting the compression resistance of the liquid-nano material 50, the threshold force level required to cause the crush-can assembly 20 to yield and move thebumper beam 18 closer to thevehicle frame 24 can be adjusted. - The
displacement resistance device 28 can thus be adjusted to provide a desired resistance to crush-can yield without requiring substantial modifications to the crush-can assembly 20. Thedisplacement resistance device 28 can be adjusted to facilitate the use of a common crush-can assembly among a variety of different vehicle architectures and different vehicle weights. - The adjusting of the
displacement resistance device 28 can occur by increasing or decreasing the compression resistance provided by thedisplacement resistance device 28, for example, by changing the composition of the liquid-nano material 50 held within thechamber 44, by changing an amount of the liquid-nano material 50 held within thechamber 44, or both. - The exemplary crush-
can assembly 20 includes an interior 62. Therack 36 extends through the interior 62 forward relative to an orientation of the vehicle 10 (FIG. 1 ) to a position where therack 36 is attached to thebumper beam 18. Therack 36 extends longitudinally aft relative to the orientation of thevehicle 10 to a position where teeth of therack 36 engage with teeth of thepinion 40. - The
pinion 40 extends from afirst end portion 66 to asecond end portion 70. Thefirst end portion 66 is secured within abracket 74 between two threaded nuts 78. The spacing between the nuts 78 is sufficient to permit rotation of thepinion 40. - In the exemplary embodiment, the
bracket 74 has a U-shaped configuration with afirst leg 82 and asecond leg 86. Thefirst leg 82 provides anaperture 90 that receives thefirst end 66 of thepinion 40. The nuts 78 are disposed on opposite side of thefirst leg 82. The nuts 78 permit rotation of thepinion 40, but substantially prevent thepinion 40 from translating relative to thebracket 74 along a rotational axis of thepinion 40. Thesecond leg 86 includes anaperture 94 that receives and holds thechamber 44 such that thechamber 44 is blocked from rotating when thepinion 40 rotates. Thebracket 74 can, in some examples, include guides 96 to ensure movement of therack 36 is along the direction D. - The
second end portion 70 of thepinion 40 threadably engages with anaperture 98 of thechamber 44. Rotating thepinion 40 in the direction R translates thechamber 44 axially relative to thepinion 40 such that theend portion 70 of thepinion 40 is inserted further into an interior of thechamber 44. - While a rack and pinion system is shown, other embodiments of the
displacement resistance device 28 could compress a liquid-nano material in other ways to provide a desired amount of resistance. - With reference now to
FIG. 8 , aline 100 represents a force versus yield distance for a crush-can assembly that does not include a displacement resistance device. Aline 110 represents the crush-can assembly represented by theline 100, but with the addition of a displacement resistance device providing a first amount of resistance.Line 120 represents the crush-can assembly inline 100 utilized with a second type of displacement resistance device that provides a second amount of resistance that is greater than the first amount of resistance. The second type of displacement resistance device could differ from the first type of displacement device only because a different composition or type of liquid-nano material is utilized. - The preceding description is exemplary rather than limiting in nature. Variations and modifications to the disclosed examples may become apparent to those skilled in the art that do not necessarily depart from the essence of this disclosure. Thus, the scope of legal protection given to this disclosure can only be determined by studying the following claims.
Claims (17)
1. A vehicle system, comprising:
a crush-can assembly disposed between a bumper member and a vehicle frame, the crush-can assembly configured to yield when the bumper member is moved closer to the vehicle frame; and
a displacement resistance device including a chamber that holds a liquid-nano material, the liquid-nano material compressed within the chamber to resist a movement of the bumper member toward the vehicle frame.
2. The vehicle system of claim 1 , wherein the crush-can assembly has an interior, the chamber disposed entirely outside the interior.
3. The vehicle system of claim 1 , wherein no portion of the chamber is disposed between the bumper member and the vehicle frame.
4. The vehicle system of claim 1 , wherein the displacement resistance device includes a rack and a pinion, the rack configured to urge the pinion to rotate when the bumper member is urged toward the vehicle frame by a force applied to the bumper member, wherein the liquid in the chamber resists a rotation of the pinion to increase the force required to move the bumper member toward the vehicle frame.
5. The vehicle system of claim 4 , further comprising a bracket secured to the crush-can assembly, the chamber held by the bracket.
6. The vehicle system of claim 5 , wherein the pinion has a first end held by the bracket and a second end extending into the chamber.
7. The vehicle system of claim 6 , wherein the second end of the pinion threadably engages the chamber.
8. The vehicle system of claim 4 , wherein the rack includes a portion that extends into an interior of the crush-can, wherein the pinion and the chamber are disposed entirely outside the interior of the crush-can.
9. The vehicle system of claim 8 , wherein the chamber and the pinion are aft the crush-can assembly relative to a general orientation of a vehicle having the crush-can assembly.
10. The vehicle system of claim 1 , wherein the liquid-nano material comprises a plurality of nanoporous particles suspended within a chemically inert liquid.
11. The vehicle system of claim 10 , wherein the plurality of nanoporous particles are silicon and the chemically inert liquid is oil or water.
12. A crush-can yield adjustment method, comprising:
holding a liquid-nano material within a chamber that is separate from a crush-can assembly, the crush-can assembly disposed between a bumper member and a vehicle frame, the crush-can assembly configured to yield when the bumper member is moved closer to the vehicle frame; and
resisting movement of the bumper member toward the vehicle frame using the liquid-nano material.
13. The crush-can yield adjustment method of claim 12 , wherein the crush-can assembly has an interior, the chamber disposed entirely outside the interior.
14. The crush-can yield adjustment method of claim 12 , further comprising:
applying a force to the bumper member;
using a rack to resist movement of the bumper member toward the vehicle frame in response to the force;
using a pinion to resist movement of the rack; and
using the liquid-nano material to resist rotation of the pinion.
15. The crush-can yield adjustment method of claim 14 , wherein the rack extends into an interior of the crush-can assembly, wherein the chamber and the pinion are aft the crush-can assembly relative to a general orientation of a vehicle having the crush-can assembly.
16. The crush-can yield adjustment method of claim 12 , wherein the liquid-nano material comprises a plurality of nanoporous particles suspended within a chemically inert liquid.
17. The crush-can yield adjustment method of claim 16 , wherein the plurality of nano-porous particles are silicon and the chemically inert liquid is oil or water.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/718,806 US11046270B1 (en) | 2019-12-18 | 2019-12-18 | Displacement resistance device for a vehicle crush-can assembly and crush-can yield adjustment method |
DE202020107242.0U DE202020107242U1 (en) | 2019-12-18 | 2020-12-14 | Displacement resistance device for a pinch can assembly of a vehicle |
CN202022994070.7U CN214355901U (en) | 2019-12-18 | 2020-12-14 | Vehicle system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US16/718,806 US11046270B1 (en) | 2019-12-18 | 2019-12-18 | Displacement resistance device for a vehicle crush-can assembly and crush-can yield adjustment method |
Publications (2)
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US20210188204A1 true US20210188204A1 (en) | 2021-06-24 |
US11046270B1 US11046270B1 (en) | 2021-06-29 |
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US16/718,806 Active 2039-12-26 US11046270B1 (en) | 2019-12-18 | 2019-12-18 | Displacement resistance device for a vehicle crush-can assembly and crush-can yield adjustment method |
Country Status (3)
Country | Link |
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US (1) | US11046270B1 (en) |
CN (1) | CN214355901U (en) |
DE (1) | DE202020107242U1 (en) |
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US11685324B2 (en) * | 2020-10-02 | 2023-06-27 | Atieva, Inc. | Member for ratcheting between a moving component and adjacent structure |
Citations (5)
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US3879023A (en) * | 1973-12-13 | 1975-04-22 | Dow Chemical Co | Method for absorbing and releasing energy |
US4257581A (en) * | 1979-07-25 | 1981-03-24 | Keeler Corporation | Impact absorbing strut |
US9371048B2 (en) * | 2014-06-23 | 2016-06-21 | Ford Global Technologies, Llc | Energy absorbing member for a bumper assembly of a vehicle |
US20180251087A1 (en) * | 2017-03-06 | 2018-09-06 | Qiusheng Gao | Safe protection equipment for all vehicles and drivers from both front and rear |
US20190016284A1 (en) * | 2017-07-12 | 2019-01-17 | Ford Global Technologies, Llc | Dual chamber crush can with nano-porous material |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100428081B1 (en) | 2001-08-17 | 2004-04-30 | 현대자동차주식회사 | Impact absorbing apparatus of bumper for car |
CN202219767U (en) | 2011-05-23 | 2012-05-16 | 清华大学 | Energy absorption type automobile bumper |
CN104088957A (en) | 2013-04-01 | 2014-10-08 | 陈曦 | Nano-porous energy absorption device |
-
2019
- 2019-12-18 US US16/718,806 patent/US11046270B1/en active Active
-
2020
- 2020-12-14 CN CN202022994070.7U patent/CN214355901U/en active Active
- 2020-12-14 DE DE202020107242.0U patent/DE202020107242U1/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3879023A (en) * | 1973-12-13 | 1975-04-22 | Dow Chemical Co | Method for absorbing and releasing energy |
US4257581A (en) * | 1979-07-25 | 1981-03-24 | Keeler Corporation | Impact absorbing strut |
US9371048B2 (en) * | 2014-06-23 | 2016-06-21 | Ford Global Technologies, Llc | Energy absorbing member for a bumper assembly of a vehicle |
US20180251087A1 (en) * | 2017-03-06 | 2018-09-06 | Qiusheng Gao | Safe protection equipment for all vehicles and drivers from both front and rear |
US20190016284A1 (en) * | 2017-07-12 | 2019-01-17 | Ford Global Technologies, Llc | Dual chamber crush can with nano-porous material |
Also Published As
Publication number | Publication date |
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CN214355901U (en) | 2021-10-08 |
DE202020107242U1 (en) | 2021-01-20 |
US11046270B1 (en) | 2021-06-29 |
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