Patent Grant
11802728
Embodiments of the invention relate to a refrigerator, more particularly, to a refrigerator including a vacuum space formed between an outer case and an inner case to improve an insulation function thereof.
A refrigerator is an electric home appliance can keep food stored in a storage compartment at a low temperature or a temperature below zero, using a refrigerant cycle.
A conventional configuration of such a refrigerator is provided with a case where a storage space is defined to store foods and a door rotatably or slidingly coupled to the case to open and close the storage space.
The case includes an inner case where the storage space is formed and an outer case configured to accommodate the inner case. An insulating material is arranged between the inner case and the outer case.
Such an insulating material suppresses the outdoor temperature from affecting an internal temperature of the storage space.
An example of the insulation material is urethane foams. Such urethane foams can be injection-foamed in the space formed between the inner and outer cases.
In this instance, to realize an insulation effect by using such the insulating material, a predetermined thickness of the insulating material has to be secured and that means that the insulating material becomes thick. Accordingly, a wall between the inner and outer cases becomes thick and the size of the refrigerator is increased as much as the thickness.
However, as a recent trend of a compact-sized refrigerator is one the rise, there is the need for the structure of the refrigerator that can make the volume of the internal storage space larger and the external size smaller.
Accordingly, the present invention proposes a refrigerator having a new structure which can perform insulation by forming a vacuum space, not by injecting the insulating material between the inner case and the outer case.
Meanwhile, vapors might be cooled and changed into frost in an evaporator composing a freezing cycle provided in the refrigerator. Such frost might be stuck to a surface of the evaporator. To solve such a problem of frost, a defrosting apparatus may be provided in the refrigerator to remove the frost by heating the frost to change it into water.
The water melted by the defrosting apparatus is exhausted to the outside of the refrigerator via a drainage pipe and such a drainage pipe is connected to the outside passing through the inner case, the outer case and the insulating material provided between the inner and outer cases.
Rather than such the drainage pipe, another pipe may be connected to the outside from the inside of the refrigerator.
In the conventional refrigerator having a foaming agent provided in the space between the inner case and the outer case, the pipe is simply connected to pass through the inner case, the insulating material and the outer case.
Accordingly, the pipe is molded of plastic and the plastic-molded pipe is disposed to pass the inner case and the outer case, and then the insulating material is foaming.
However, in the vacuum refrigerator according to the present invention, the pipe is connected to pass the vacuum space, with maintaining the airtight state of the vacuum space. If the plastic pipe is used, it is difficult to maintain the airtight state at the connection area between the pipe and the vacuum space and the connection area cannot endure the vacuum pressure of the vacuum space disadvantageously.
Moreover, if the pipe is formed of a metal pipe capable of being welded to the inner case and the outer case formed of a steel sheet, heat transfer might be generated via the pipe and an insulation performance of the refrigerator might be deteriorated accordingly.
To solve the problems, an object of the invention is to provide a refrigerator that is able to improve an insulation effect by forming the vacuum space between the inner case and the outer case and to promote a compact volume.
Another object of the present invention is to provide a refrigerator that is able to form the vacuum space between the inner case and the outer case and that has a supporting structure to maintain the distance between the inner case and the outer case, without deformation of the inner and outer cases generated by an external shock.
A further object of the present invention is to provide a refrigerator including a connection pipe that has a structure capable of enduring a vacuum pressure, with allowing a drainage pipe, a pipe or a refrigerant pipe to pass through the vacuum space.
A still further object of the present invention is to provide a refrigerator having a connection pipe that can reduce the heat transfer generated there through.
To achieve these objects and other advantages and in accordance with the purpose of the embodiments, as embodied and broadly described herein, a refrigerator comprise an inner case that defines a storage space and that has a first communication hole defined through the inner case; an outer case that is spaced apart a distance from the inner case and that has a second communication hole defined through the outer case at a position corresponding to the first communication hole of the inner case, the outer case and the inner case defining, between the outer case and the inner case, a vacuum space that is maintained at a partial vacuum pressure and that is configured to insulate the inner case from the outer case; and a connection pipe that passes through the vacuum space and that connects the first communication hole of the inner case to the second communication hole of the outer case.
The connection pipe may connect a space defined by the inner case with a space defined by the outer case.
An internal space of the connection pipe may be in a state other than a vacuum state.
The connection pipe may define a passage through which water is drained or through which a drainage pipe passes.
The connection pipe may comprise a lateral wall corrugation part that defines a lateral wall of the connection pipe in a corrugated manner.
The lateral wall corrugation part may be configured to decrease conduction efficiency by increasing a distance where conduction between the inner case and the outer case is generated.
The lateral wall corrugation part of the connection pipe may comprise a metal thin film having a thickness of 0.05-0.2 mm.
The connection pipe may be welded to the inner case and the outer case.
The refrigerator may further comprise a first support plate located at a surface of the inner case that faces the outer case; and a plurality of spacers configured to maintain the vacuum space between the inner case and the outer case.
The refrigerator may further comprise a second support plate located at a surface of the outer case that faces the first support plate.
The plurality of spacers may be fixed to the first support plate and the second support plate comprises a plurality of grooves that are defined in an inner surface thereof and that are configured to receive ends of the spacers therein.
The connection pipe may be welded to the inner case and the outer case, and passes through the first support plate and the second support plate.
A third communication hole may be defined through the first support plate and a fourth communication hole is defined through the second support plate, the third communication hole and the fourth communication hole correspond to the first communication hole defined through the inner case and the second communication hole defined through the outer case, and the third communication hole defined through the first support plate and the fourth communication hole defined through the second support plate are larger than the first communication hole defined through the inner case and the second communication hole defined through the outer case.
The connection pipe may be spaced apart a distance from the plurality of spacers such that the connection pipe does not interfere with the plurality of spacers.
Plastic may be coated on an inner surface of the connection pipe to reduce corrosion.
In another aspect of the present invention, a refrigerator comprises an inner case that defines a storage space and that has a first communication hole defined through the inner case; an outer case that is spaced apart a distance from the inner case and that has a second communication hole defined through the outer case at a position corresponding to the first communication hole of the inner case, the outer case and the inner case defining, between the outer case and the inner case, a vacuum space that is maintained at a partial vacuum pressure and that is configured to insulate the inner case from the outer case; and a communication pipe that connects a space defined by the inner case with a space defined by the outer case.
The refrigerator may further comprise a first support plate located at a surface of the inner case that faces the outer case; and a plurality of spacers configured to maintain the vacuum space between the inner case and the outer case.
In further aspect of the present invention, a refrigerator comprises an inner case that defines a storage space and that has a first communication hole defined through the inner case; an outer case that is spaced apart a distance from the inner case and that has a second communication hole defined through the outer case at a position corresponding to the first communication hole of the inner case, the outer case and the inner case defining, between the outer case and the inner case, a vacuum space that is maintained at a partial vacuum pressure and that is configured to insulate the inner case from the outer case; and a connection pipe that passes through the vacuum space and that connects the first communication hole of the inner case to the second communication hole of the outer case, wherein at least a portion of a lateral wall of the connection pipe has a bellow pipe type configuration.
The connection pipe may connect a space defined by the inner case with a space defined by the outer case.
The connection pipe may define a passage through which water is drained or through which a drainage pipe passes.
The refrigerator according to embodiments has following advantageous effects. According to the refrigerator, the vacuum space is formed between the inner case and the outer case, instead of the conventional insulating material. Such the vacuum space performs the insulation to restrain heat transfer between the inner case and the outer case.
The insulation effect of the vacuum state is more excellent than the conventional insulating material. The refrigerator according to the present invention has an advantage of excellent insulation, compared with the insulation effect achieved by the conventional insulating material the conventional refrigerator. The refrigerator according to the present invention has an advantage of good insulation, compared with the conventional refrigerator.
Meanwhile, if the vacuum state of the vacuum space is maintained, the insulation function is performed, regardless of the thickness (the distance between the inner case and the outer case). However, the thickness of the conventional insulating material has to be larger to enhance the insulating effect and such increase of the thickness results in increase of the refrigerator size.
Accordingly, compared with the conventional refrigerator, the refrigerator according to the present invention can reduce the size of the outer case while maintaining the storage compartment with the same size. Accordingly, the present invention can be contributed to a compact sized refrigerator.
Furthermore, the present invention can provide a refrigerator including a connection pipe that has a structure capable of enduring a vacuum pressure, with allowing a drainage pipe, a pipe or a refrigerant pipe to pass through the vacuum space.
Still further, the connection pipe passing through the vacuum space formed between the inner case and the outer case can reduce heat transfer.
Still further, a predetermined portion of a lateral wall possessed by the connection pipe is formed of a bellows type pipe that can be elastically transformed. Accordingly, durability of the refrigerator may be enhanced with respect to an external shock.
It is to be understood that both the foregoing general description and the following detailed description of the embodiments or arrangements are exemplary and explanatory and are intended to provide further explanation of the embodiments as claimed.
Arrangements and embodiments may be described in detail with reference to the following drawings in which like reference numerals refer to like elements and wherein:
Exemplary embodiments of the present invention will be described in detail, referring to the accompanying drawing figures which form a part hereof.
As shown in
The first door 4 is configured to open and close a freezer compartment that consists of the storage compartment and the second door 5 is configured to open and close a refrigerator compartment that consists of the storage compartment. By nonlimiting example, the present invention may include various types of refrigerator.
In other words, the refrigerator shown in
The structure of the case 1 includes an inner case 110 in which the storage space is formed, an outer case 120 accommodating the inner case 110, spaced apart a predetermined distance from the inner case, a vacuum space 130 provided between the inner case and the outer case, with being closed to maintain a vacuum state to perform the insulation function between the inner case and the outer case, and a connection pipe 200 provided in the vacuum space 130 to connect a communication hole 112 of the inner case and a communication hole 122 of the outer case with each other.
The outer case 120 is spaced apart a predetermined distance from the inner case 110. No auxiliary insulating material is provided in a space formed between the outer case 120 and the inner case 110 and the space is maintained in a vacuum state to perform insulation.
In other words, the vacuum space 130 is formed between the outer case 120 and the inner case 110, to remove a medium that delivers the heat between the cases 110 and 120.
Accordingly, the heat from the hot air outside the outer case 120 can be prevented from being transmitted to the inner case as it is.
Meanwhile, for convenience sake,
The connection pipe 200 and the spacers 150 will be described later in detail.
The connection pipe 200 is used as a passage for exhausting defrosted water from an evaporator and the like or a passage for passing a pipe connected to the outside of the outer case 120 from the inside of the inner case there through. In other words, the connection pipe 200 may connect a communication hole of the inner case 110 and a communication hole of the outer case 120 with each other. Also, the connection pipe 200 may make a space defined by the inner case 110 and a space defined by the outer case 120 communicate with each other. For instance, the connection pipe 200 may be employed as a passage where the defrosted water generated in the inner case 110 is exhausted outside the outer case 120.
The connection pipe 200 may pass through the vacuum space 130. Accordingly, an external portion of the connection pipe 200, in other words, a portion corresponding to the vacuum space 130 has to be maintained vacuum. It is preferred that the connection portions of the connection pipe 200 with the inner case 110 and the outer case 120 are welded, to enable the connection pipe 200 to endure the vacuum pressure. Meanwhile, an internal space of the connection pipe 200 is separated from the vacuum space 130, in communication with the space defined by the inner case 110 the space defined by the outer case 120. Because of that, the internal space of the connection pipe 200 is not in a vacuum state.
Typically, both of the inner and outer cases 110 and 120 are fabricated of a steel sheet. Accordingly, it is preferred that the connection pipe 200 is formed of a metal material that can be welded to such a steel sheet.
In addition, the connection pipe 200 may have a lateral wall corrugated to maintain a predetermined strength for maintaining the airtightness of the vacuum space 130 and to minimize the heat transfer generated by conduction.
The corrugated lateral wall of the connection pipe 200 may be referenced to as ‘a lateral wall corrugation part 240’.
The strength of such a lateral wall corrugation part 240 has to be good because such a lateral wall corrugation part 240 has to endure the vacuum pressure difference between the inside and the outside of the vacuum space 130.
To secure such a good strength, if the connection pipe simply formed of a thick steel sheet pipe is welded and connected, the strength could be sufficient but the insulation performance might be deteriorated by the heat conducted via the connection pipe.
To prevent the deterioration of the insulation performance, as shown in
Such the lateral wall corrugation part 240 may be a bellow type pipe and it is preferred that at least a predetermined portion of the connection pipe 200 according to the present invention is a bellows type pipe.
As mentioned above, the lateral wall corrugation part 240 of the connection pipe 200 is fabricated by welding inner diameter areas and outer diameter areas with each other sequentially, while layering the metal thin films. The lateral wall corrugation part 240 may be welded to an upper pipe part 220 and a lower pipe part 230 to be integrally formed with each other.
The upper pipe part 220 and the lower pipe part 230 of the connection part 200 may be circular pipes having a predetermined height, diameter and thickness, to be welded to the lateral wall corrugation part 240 to form the connection pipe 200.
The heights of the upper pipe part 220 and the lower pipe part 230 that consist of the connection pipe 200 may be determined in consideration of the heights of the lateral wall corrugation part 240 and the vacuum space 130.
For instance, when they are welded to the outer case 120 and the inner case 110, the upper pipe part 220 and the lower pipe part 230 that consist of the connection pipe 200 may be welded to be more projected upwardly and downwardly than a top surface of the outer case 120 and a bottom surface of the inner case 110 as shown in
Optionally, when they are welded to the outer case 120 and the inner case 110, respectively, the heights of the upper pipe part 220 and the lower pipe part 230 composing the connection pipe 200 may be formed identical to the height of the top surface of the outer case 120 and to the height of the bottom surface of the inner case 110, respectively, not to be projected.
In addition, the height of the lateral wall corrugation part 240 of the connection pipe 200 may be identical to or smaller than the height of the vacuum space 130.
As the lateral wall corrugation part 240 of the connection pipe 200 is formed of the metal thin film, the strength of the metal thin film, especially, the strength for enduring the vacuum pressure in a radial direction may be enhanced remarkably. In addition, the passage where the heat is conducted via the connection pipe 200 is formed quite long, only to reduce the heat transfer generated by the conduction.
Communication holes (112 and 122, see
The upper pipe part 220 of the connection pipe 200 may be welded to the communication hole 112 of the outer case 120 and the lower pipe part 230 thereof may be welded to the communication hole 122 of the inner case 110.
The lateral wall corrugation part 240 of the connection pipe 200 may be welded while layering the metal thin films. Optionally, the upper pipe part 220, the lateral wall corrugation part 240 and the lower pipe part 230 may be integrally formed with each other by a compression molding method.
The connection pipe fabricated as mentioned above is shown in
The metal thin film used in forming the lateral wall corrugation part 240 of the connection pipe 200 has a thickness of 0.05-0.2 mm.
The thickness of the lateral wall corrugation part 240 has to be more than 0.05 mm to have a sufficient strength capable of enduring the vacuum pressure in the vacuum space.
The thickness of the lateral wall corrugation part 240 may have a thickness of 0.2 mm or less because it is a passage of heat transfer generated by conduction to the inner case 110 from the outer case 120.
The upper pipe part 220 and the lower pipe part 230 may be formed thicker than the lateral wall corrugation part 240. It is preferred that the upper pipe part 220 and the lower pipe part 230 are formed not so thick to reduce the conduction heat transfer only if they can maintain an appropriate strength.
The case 1 may further include a first support plate provided one of surfaces of the inner and outer cases 110 and 120 that face each other, and a plurality of spacers fixed to the first support plate to maintain a distance spaced apart between the inner case and the outer case.
The plurality of the spacers 150 may be arranged to maintain the distance between the inner case 110 and the outer case 120 to make the vacuum space 130 maintain its profile. Such the spacers 150 may support the first support plate to maintain the distance between the inner case 110 and the outer case 120.
The plurality of the spacers 150 may be fixed between the inner case 110 and the outer case 120. The plurality of the spacers 150 may be arranged in the first support plate 160 as a fixing structure.
The first support plate 160 may be provided in contact with one of facing surfaces possessed by the inner and outer cases 110 and 120.
In
Referring to
As shown in the connection pipe 200 of
However, as shown in
In other words, the connection pipe 200 may be arranged distant from the spacers not to interfere with the spacers 150.
Accordingly, the connection pipe 200 may be arranged between the first support plate 160 and the second support plate 170 where the spacers 150 are arranged. The heat transfer from the connection pipe 200 to the spacers 150 can be reduced as much as possible.
As shown in
In the embodiment shown in
The first support plate 160 is in contact with the outer surface of the inner case 110 and the second support plate 170 is in contact with the inner surface of the outer case 120. Accordingly, the spacers 150 supportably maintain the distance between the inner case 110 and the outer case 120.
In the embodiment shown in
In case of no second support plate 170 as mentioned above, ends of the spacers 150 may be arranged to directly contact with the inner surface of the outer case 120.
As shown in a circle enlarged in
The plurality of the grooves 175 formed in the second support plate 170 may facilitate the fixing of relative position with respect to the spacers 150, when the second support plate 170 is placed on the spacers 150 integrally formed with the first support plate 160.
An end of each spacer 150 may be convexly curved.
As shown in a circle enlarged in
Moreover, it is more preferred that the plurality of the grooves 175 formed in the second support plate 170 are convexly curved, corresponding to the shape of the spacers 150.
The shapes of the grooves 175 formed in the second support plate 170 may be corresponding to the shapes of the spacers 150. Accordingly, it is easy to determine the positions of the spacers in the assembling work and the second support plate 170 can be fixed in parallel with the ends of the spacers, without movement.
The connection pipe 200 may be welded to the inner case 110 and the outer case 120, after passing through the first support plate 160 and the second support plate 170.
In
In other words, outer surfaces of the upper pipe part 220 and the lower pipe part 230 composing the connection pipe 200 are welded to the communication hole 112 of the inner case and the communication hole 122 of the outer case 120, respectively.
Moreover, communication holes 162 and 172 may be formed in the first support plate 160 and the second support plate 170, respectively. The communication holes 162 and 172 may be concentric with respect to the connection pipe 200.
The diameters of the communication holes 162 and 172 formed in the first and second support plates 160 and 170, respectively, may be larger than the diameters of the communication holes 112 and 122 formed in the inner case 110 and the outer case 120.
The inner case 110 and the outer case 120 may be formed of a steel sheet. The first support plate 160 and the second support plate 170 may be formed of metal, ceramic or reinforced plastic.
When the connection pipe 200 is welded to the inner case 110 and the outer case 120, the first support plate 160 and the second support plate 170 as the structures for supporting the spacers 150 might be affected. It is preferred that the communication holes 162 and 172 of the first and second support plates 160 and 170 may be larger than the communication holes 112 and 122 of the inner and outer cases 110 and 120.
Lastly, it is preferred that an inner surface of the connection pipe 200 is coated by plastic to prevent corrosion.
Liquid such as water or refrigerant may flow or external air may be drawn in the connection pipe 200 formed of the metal thin film. An inner surface of the connection pipe 200 might be corroded.
Accordingly, as shown in
According to the refrigerator having the vacuum space, the connection pipe can endure the vacuum pressure while drained water or pipe is flowing in the connection pipe.
Moreover, the lateral wall of the connection pipe is formed of a bellow pipe and the connection pipe can reduce the heat transfer as much as possible.
Various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2011-0113415 | Nov 2011 | KR | national |
This application is a continuation of U.S. application Ser. No. 16/675,716, filed on Nov. 6, 2019, which is a continuation of U.S. application Ser. No. 16/137,290, filed Sep. 20, 2018, now U.S. Pat. No. 10,514,197, which is a continuation of U.S. application Ser. No. 14/958,328, filed Dec. 3, 2015, now U.S. Pat. No. 10,082,328, which is a continuation of U.S. application Ser. No. 13/654,566, filed Oct. 18, 2012, now U.S. Pat. No. 9,228,775, which claims priority under 35 U.S.C. § 119 from Korean Application No. 10-2011-0113415, filed Nov. 2, 2011, the contents of which are incorporated herein by reference.
| Number | Name | Date | Kind |
|---|---|---|---|
| 1518668 | Mitchell | Dec 1924 | A |
| 1541945 | Hamilton | Jun 1925 | A |
| 1561769 | Ballew | Nov 1925 | A |
| 1588707 | Alexander | Jun 1926 | A |
| 1747969 | Carrey | Feb 1930 | A |
| 1770200 | Comstock | Jul 1930 | A |
| 1814114 | Light | Jul 1931 | A |
| 1833633 | Light | Nov 1931 | A |
| 2000882 | Comstock | May 1935 | A |
| 2044600 | Willaims | Jun 1936 | A |
| 2053252 | Cook et al. | Sep 1936 | A |
| 2102698 | Gould | Dec 1937 | A |
| 2196373 | Wallach | Apr 1940 | A |
| 2773362 | Scheitlin | Dec 1956 | A |
| 3161265 | Matsch | Dec 1964 | A |
| 4036617 | Leonard et al. | Jul 1977 | A |
| 4147037 | Gelbard et al. | Apr 1979 | A |
| 4301658 | Reed | Nov 1981 | A |
| 4526015 | Laskaris | Jul 1985 | A |
| 4959111 | Kruck | Sep 1990 | A |
| 5027574 | Phillip | Jul 1991 | A |
| 5081761 | Rinehart et al. | Jan 1992 | A |
| 5157893 | Benson et al. | Oct 1992 | A |
| 5175975 | Benson et al. | Jan 1993 | A |
| 6037033 | Hunter | Mar 2000 | A |
| 6073944 | Moore | Jun 2000 | A |
| 6224179 | Wenning et al. | May 2001 | B1 |
| 6257684 | Hirath et al. | Jul 2001 | B1 |
| 6393798 | Hirath et al. | May 2002 | B1 |
| 6479112 | Shukuri et al. | Nov 2002 | B1 |
| 6938968 | Tanimoto et al. | Sep 2005 | B2 |
| 7003973 | Lee et al. | Feb 2006 | B2 |
| 7806955 | Wang et al. | Oct 2010 | B2 |
| 20010055478 | Scherzer et al. | Dec 2001 | A1 |
| 20030167789 | Tanimoto et al. | Sep 2003 | A1 |
| 20050175809 | Hirai et al. | Aug 2005 | A1 |
| 20050200252 | Muller et al. | Sep 2005 | A1 |
| 20070214824 | Itsuki | Sep 2007 | A1 |
| 20100251653 | Mills | Oct 2010 | A1 |
| 20110259040 | Cataldo et al. | Oct 2011 | A1 |
| 20120060543 | Hanley et al. | Mar 2012 | A1 |
| 20120104002 | Jung et al. | May 2012 | A1 |
| 20130029082 | Park | Jan 2013 | A1 |
| Number | Date | Country |
|---|---|---|
| 85106738 | Jun 1986 | CN |
| 2033487 | Mar 1989 | CN |
| 2226260 | May 1996 | CN |
| 2241851 | Dec 1996 | CN |
| 1536305 | Oct 2004 | CN |
| 2720362 | Aug 2005 | CN |
| 2777463 | May 2006 | CN |
| 101038121 | Sep 2007 | CN |
| 101487652 | Jul 2009 | CN |
| 101595340 | Dec 2009 | CN |
| 101793455 | Aug 2010 | CN |
| 0071090 | Feb 1983 | EP |
| 1835242 | Sep 2007 | EP |
| S60137293 | Sep 1985 | JP |
| 200516629 | Jan 2005 | JP |
| 2003156193 | Apr 2005 | JP |
| 2005163848 | Jun 2005 | JP |
| 2009174797 | Aug 2009 | JP |
| 1020050028296 | Mar 2005 | KR |
| 100725188 | Apr 2007 | KR |
| 1020090059660 | Jun 2009 | KR |
| 1020110072686 | Jun 2011 | KR |
| WO1999020961 | Apr 1999 | WO |
| WO2011016693 | Feb 2011 | WO |
| Entry |
|---|
| Chinese Office Action dated Aug. 1, 2014 for Chinese Application. No. 201210433194.5, with English Translation, 17 pages. |
| Chinese Office Action dated Jul. 24, 2014 for Chinese Application No. 201210432112.5, with English Translation, 21 pages. |
| Chinese Office Action dated Jul. 7, 2014 for Chinese Application No. 201210428777.9, with English Translation, 26 pages. |
| European Search Report in European Application No. 12007264.0, dated Sep. 14, 2018, 5 pages. |
| Partial European Search Report in European Application No. 12007264.0, dated Apr. 20, 2017, 12 pages (with English translation). |
| U.S. Final Office Action dated Aug. 31, 2015, for U.S. Appl. No. 13/655,677, 37 pages. |
| U.S. Office Action dated Dec. 15, 2014 for U.S. Appl. No. 13/654,551, 11 Pages. |
| U.S. Office Action dated Jun. 27, 2014 for U.S. Appl. No. 13/665,057, 14 pages. |
| U.S. Office Action dated Mar. 5, 2015 for U.S. Appl. No. 13/655,677, 18 pages. |
| Korean Notice of Allowance in Korean Application No. 10-2011-0113415, dated Feb. 14, 2018, 3 pages. |
| Korean Notice of Allowance in Korean Application No. 10-2019-0028115, dated Mar. 21, 2019, 8 pages (with English [SJ translation). |
| Number | Date | Country | |
|---|---|---|---|
| 20220214098 A1 | Jul 2022 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 16675716 | Nov 2019 | US |
| Child | 17702564 | US | |
| Parent | 16137290 | Sep 2018 | US |
| Child | 16675716 | US | |
| Parent | 14958328 | Dec 2015 | US |
| Child | 16137290 | US | |
| Parent | 13654566 | Oct 2012 | US |
| Child | 14958328 | US |
