Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
  • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
  • B32B37/1284—Application of adhesive
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
  • B29C73/04—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D using preformed elements
  • B29C73/10—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D using preformed elements using patches sealing on the surface of the article
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
  • B29C73/02—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D using liquid or paste-like material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
  • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
  • B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
  • B32B37/18—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of discrete sheets or panels only
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2405/00—Adhesive articles, e.g. adhesive tapes
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
  • Y10T156/10—Methods of surface bonding and/or assembly therefor
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/16—Two dimensionally sectional layer
  • Y10T428/163—Next to unitary web or sheet of equal or greater extent
  • Y10T428/168—Nonrectangular
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/21—Circular sheet or circular blank
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24777—Edge feature

Definitions

• the present disclosure relates generally to coupling mechanisms and, more particularly, to a peel-resistant edge that may be used to bond a plurality of components together and/or repair a structure.
• Known aircraft systems include a plurality of components that are coupled and/or bonded together. Over time, at least some of the components may become uncoupled and/or disbonded from each other and/or from the system. Moreover, at least some known aircraft systems require routine maintenance including repair of structural inconsistencies. At least some known structural inconsistencies are repaired using a bonded patch to reduce or eliminate the effects of the structural inconsistencies. Over time, at least some known patches may disbond due to inadequate adhesive properties, surface preparation, and/or a premature failure due to out-of-plane conditions created along the outer edges of the patch.
• a method for use in providing a peel-resistant mechanism.
• the method includes positioning a body, and extending a plurality of arms from the body such that a recess is defined between each pair of adjacent arms. At least one of the plurality of arms is positionable to facilitate restricting an edge disbond from spreading across the body of the patch.
• a peel-resistant mechanism in another aspect, includes a body, and a plurality of arms extending from the body such that a recess is defined between each pair of adjacent arms. At least one of the arms is positionable to facilitate restricting an edge disbond from spreading across the body of the patch.
• the peel-resistant mechanism has a first portion that extends generally along an edge of at least one of said plurality of arms. Still further, said first portion may have a substantially uniform width along a length of said edge.
• the peel-resistant mechanism may have a second portion substantially polygonal shape that extends substantially along a radius of said at least one of said plurality of arms and wherein said first portion is generally radially outward of said second portion.
• the peel-resistant mechanism may have a first portion that is adjacent to the recess or that is substantially centered within at least one of said plurality of arms. Alternatively said peel-resistant mechanism may also be is substantially symmetrical.
• a peel-resistant assembly in yet another aspect, includes a first peel-resistant mechanism and a second peel-resistant mechanism.
• the first peel-resistant mechanism includes a first body and a first plurality of arms extending from the first body such that a first recess is defined between each pair of adjacent arms of the first plurality of arms.
• the second patch includes a second body and a second plurality of arms extending from the second body such that a second recess is defined between each pair of adjacent arms of the second plurality of arms.
• FIG. 1 is a schematic illustration of a peel-resistant assembly
• FIG. 2 is a perspective view of an exemplary peel-resistant mechanism that may be used with the peel-resistant assembly shown in FIG. 1 ;
• FIGS. 3-6 is a perspective view of alternative peel-resistant mechanisms
• FIG. 7 is a schematic illustration of exemplary adhesive patterns that may be used with the peel-resistant mechanisms shown in FIGS. 2-6;
• FIG. 8 is a schematic illustration of a disbond growth pattern of the peel- resistant mechanism shown in FIG. 2.
• a peel-resistant mechanism that includes a body and a plurality of arms that extend from the body such that a recess is defined between adjacent arms. At least one of the arms is positionable to facilitate restricting an edge disbond from spreading across the body.
• the peel-resistant mechanism is applicable wherever there is a desire to securely bond two structural components and/or elements together. For example, the peel-resistant mechanism is applicable in production and/or repair.
• the unique edge trim on bonded components can create a failsafe-type behavior for bonded joints.
• FIG. 1 is a schematic illustration of an exemplary two-ply, peel-resistant assembly 100 for use in coupling a plurality of components (not shown) together and/or repairing a structure (not shown).
• assembly 100 includes at least a first adherent or patch 1 10 and a second adherent or patch 120.
• Assembly 100 may be fabricated with any number of plies that enables assembly 100 to function as described herein.
• each ply may include any fiber orientation and/or may be fabricated from any material that enables assembly 100 to function as described herein.
• first patch 1 10 includes a first body 130 and a plurality of arms 140 that extend from body 130
• second patch 120 includes a second body 132 and a second plurality of arms 142 that extend from body 132.
• each arm 140 and 142 is positionable to facilitate restricting an edge disbond from traversing or spreading across body 130 and 132, respectively.
• first patch 1 10 and second patch 120 are oriented in a staggered arrangement that facilitates increasing a damage- isolation capability of assembly 100. More specifically, in the exemplary embodiment, each arm 140 extending from first patch 1 10 is positioned between adjacent arms 142 extending from second patch 120, and/or each arm 142 extending from second patch 120 is positioned between adjacent arms 140 extending from first patch 1 10.
• patches 1 10 and 120 may be oriented and/or positioned in any arrangement that enables assembly 100 to function as described herein. For example, patches 1 10 and 120 may be substantially aligned such that patch 120 is on substantially covers patch 1 10.
• FIG. 2 is a perspective view of first patch 1 10.
• first patch 1 10 is substantially identical to second patch 120. More specifically, in the exemplary embodiment, patches 1 10 and 120 are substantially similar in shape and/or size. As such, first patch 1 10 and second patch 120 are described generally herein as patch 1 10. Alternatively, first patch 1 10 and second patch 120 may have any shape and/or size, including different shapes and/or sizes, that enables assembly 100 to function as described herein. Moreover, first patch 1 10 and second patch 120 may include any fiber orientation and/or may be fabricated from any material that enables assembly 100 to function as described herein.
• patch 1 10 has a peel-resistant mechanism or an outer edge 170 that is formed with a plurality of peaks 180 and a plurality of valleys 190 arranged in a scalloped pattern that defines arms 140 and/or recesses 160, respectively. More specifically, in the exemplary embodiment, edge 170 facilitates increasing an outer perimeter and circumference of patch 1 10 while decreasing stress gradients within patch 1 10.
• each arm 140 floats such that a substantially consistent bondline may be provided along edge 170.
• arms 140 and 142 enable edge 170 to substantially follow a contour of the component and/or the structure such that the bondline remains substantially consistent along edge 170. As such, disbond initiation and/or growth of patch 1 10 is limited by edge 170.
• patch 1 10 has a thickness that is less than approximately 0.250 inches (in.). More particularly, in the exemplary embodiment, the thickness is less than approximately 0.125 in. Even more particularly, in the exemplary embodiment, the thickness is approximately 0.060 in. for at least a portion of patch 1 10 and tapers towards outer edge 170. Alternatively, patch 1 10 may have any thickness that enables assembly 100 to function as described herein.
• arms 140 extend generally radially from a center 150 of body 130. Each recess 160 is defined between adjacent arms 140.
• the scalloped design of edge 170 is substantially constant about body 130 such that arms 140 are substantially identical in shape and/or size, and patch 1 1 0 is substantially symmetrical.
• arms 140 may each have any shape and/or size that enables patch 1 10 to function as described herein.
• patch 1 10 is fabricated from a pliable and/or workable material that enables providing a substantially consistent bondline along edge 170.
• patch 1 10 may be fabricated from, without limitation, graphite, glass, fabric, tape, aluminum, and/or any other fiber, resin, metallic and/or composite materials that enable patch 1 10 to function as described herein.
• FIG. 3-6 is a perspective view of alternative peel resistant applied edge details or patches 210, 310, 410, and 510, respectively.
• patch 210 may be used in a production application and includes a body 230 and a plurality of arms 240 that extend from body 230.
• patch 210 has an outer edge 270 that is formed with a plurality of peaks 280 and a plurality of valleys 290 arranged in a scalloped pattern that defines arms 240 and/or recesses 260, respectively.
• body 230 is substantially rectangular in shape, and arms 240 extend generally parallel to each other from body 230. Each recess 260 is defined between adjacent arms 240.
• the scalloped design of edge 270 is substantially constant about body 230 such that arms 240 are substantially identical in shape and/or size.
• arms 240 may have any shape and/or size that enables patch 210 to function as described herein.
• patch 310 may be used in a repair application and includes a body 330 and a plurality of arms 340 that extend from body 330.
• arms 340 extend generally radially from a center 350 of body 330.
• patch 310 has an outer edge 370 that is formed such that a slit 372 and a recess or opening 360 is defined between adjacent arms 340.
• slit 372 has a width that is less than approximately 0.15 in. More particularly, in the exemplary embodiment, the width is less than approximately 0.100 in. Even more particularly, in the exemplary embodiment, the width is approximately 0.050 in.
• slit 372 may have any width that enables patch 310 to function as described herein.
• opening 360 has a diameter that is between approximately 0.25 in. and approximately 0.50 in. More particularly, in the exemplary embodiment, the diameter is between approximately 0.30 in. and 0.45 in. Even more particularly, in the exemplary embodiment, the diameter is approximately 0.375 in.
• opening 360 may have any diameter that enables patch 310 to function as described herein.
• the design of edge 370 is substantially constant about body 330 such that arms 340 are substantially identical in shape and/or size. Alternatively, arms 340 may have any shape and/or size that enables patch 310 to function as described herein.
• patch 410 may be used in a production and/or repair application and includes a body 430 and a plurality of arms 440 that extend from body 430.
• patch 410 has an outer edge 470 that is formed such that a slit 472 and a recess or opening 460 is defined between adjacent arms 440.
• slit 472 has a width that is less than approximately 0.15 in. More particularly, in the exemplary embodiment, the width is less than approximately 0.100 in. Even more particularly, in the exemplary embodiment, the width is approximately 0.050 in.
• slit 472 may have any width that enables patch 410 to function as described herein.
• opening 460 has a diameter that is between approximately 0.25 in. and approximately 0.50 in. More particularly, in the exemplary embodiment, the diameter is between approximately 0.30 in. and 0.45 in. Even more particularly, in the exemplary embodiment, the diameter is approximately 0.375 in.
• opening 460 may have any diameter that enables patch 410 to function as described herein.
• body 430 is substantially rectangular in shape, and arms 440 extend generally parallel to each other from body 430.
• the design of edge 470 is substantially constant about body 430 such that arms 440 are substantially identical in shape and/or size.
• arms 440 may have any shape and/or size that enables patch 410 to function as described herein.
• patch 510 may be used in a production application of a stringer and includes a body 530 and a plurality of arms 540 that extend from body 530.
• patch 510 has an outer edge 570 that is formed such that a slit 572 and a recess or opening 560 is defined between adjacent arms 540.
• slit 572 has a width that is less than approximately 0.15 in. More particularly, in the exemplary embodiment, the width is less than approximately 0.10 in. Even more particularly, in the exemplary embodiment, the width is approximately 0.050 in.
• slit 572 may have any width that enables patch 510 to function as described herein.
• opening 560 has a diameter that is between approximately 0.25 in. and approximately 0.50 in. More particularly, in the exemplary embodiment, the diameter is between approximately 0.30 in. and 0.45 in. Even more particularly, in the exemplary embodiment, the diameter is approximately 0.375 in.
• opening 560 may have any diameter that enables patch 510 to function as described herein.
• body 530 is shaped and/or contoured to define a channel 574 that is shaped and/or sized to receive another component, such as a stringer, and arms 540 extend generally parallel to each other from body 530.
• the design of edge 570 is substantially constant about body 530 such that arms 540 are substantially identical in shape and/or size.
• arms 540 may have any shape and/or size that enables patch 510 to function as described herein.
• FIG. 7 is a schematic illustration of exemplary adhesive patterns that may be used with peel-resistant patch 1 10.
• an adhesive layer 600 extends across an underside of patch 1 10 to facilitate bonding patch 1 10 to the structure.
• patch 1 10 may be used for use with pre-cured and/or green (i.e., uncured or wet lay-up) bonded repairs in a flush (e.g., scarfed/stepped) and/or overlay arrangement.
• patch 1 10 may be used as a doubler (overlay) patch over a cracked metal structure or as a preventative measure over a metal structure that has a potential for cracking.
• adhesive layer 600 includes a first portion 610 including a first adhesive (not shown) that has a first adhesive property, and a second portion 620 that has a second adhesive (not shown) that has a second adhesive property that is different than the first adhesive property.
• the different adhesives facilitate creating and/or increasing a disbond-resistant barrier of patch 1 10.
• the first adhesive provides a relatively strong, stiff bondline
• the second adhesive provides a relatively compliant, crack-resistant bondline.
• adhesive layer 600 may be formed with any number of portions and/or adhesives that enables adhesive layer 600 to function as described herein.
• first portion 610 and/or second portion 620 are oriented to facilitate coupling patch 1 10 to structure and/or to facilitate restricting an edge disbond from spreading across body 130.
• first portion 610 may extend across at least a portion of body 130 and/or arms 140
• second portion 620 may extend across at least another portion of body 130 and/or arms 140.
• Adhesive layer 600 may include any combination of a first pattern 630, a second pattern 640, a third pattern, 650, a fourth pattern 660, a fifth pattern 670, and/or any other pattern of adhesive that enables adhesive layer 600 to function as described herein.
• first portion 610 functions as an outer portion that extends generally along edge 170 of patch 1 10, and second portion 620 functions as an inner portion that is at least partially circumscribed by first portion 610.
• first portion 610 has a substantially uniform width 680 extending along edge 170 of patch 1 10.
• first portion 610 may have any width, including varying widths, that enables adhesive layer 600 to function as described herein.
• first portion 610 functions as a distal portion that is positioned adjacent to peak 180
• second portion 620 functions as a proximal portion that is positioned adjacent to valley 190.
• first portion 610 is positioned generally radially outward of second portion 620.
• an interface 690 defined between first portion 610 and second portion 620 is generally arcuate and extends between opposing lateral sides 700 of arm 140.
• interface 690 may have any shape and/or configuration that enables adhesive layer 600 to function as described herein.
• first portion 610 is positioned adjacent to recess 160, and second portion 620 at least partially circumscribes first portion 610. More specifically, in the exemplary embodiment, first portion 610 surrounds valley 190 and is substantially centered relative to recess 160. Alternatively, first portion 610 may be positioned at any location that enables adhesive layer 600 to function as described herein. In the exemplary embodiment, first portion 610 extends between two adjacent arms 140. More specifically, in the exemplary embodiment, an interface 690 defined between first portion 610 and second portion 620 is generally arcuate and extends between a first lateral side 700a of a first arm 140a and a second lateral side 700b of a second arm 140b.
• interface 690 may have any shape and/or configuration that enables adhesive layer 600 to function as described herein.
• first portion 610 functions as an outer portion that extends substantially along edge 170 of patch 1 10
• second portion 620 functions as an inner portion that is at least partially circumscribed by first portion 610. More specifically, in the exemplary embodiment, first portion 610 completely circumscribes second portion 620.
• second portion 620 is substantially circular in shape and is substantially centered within arm 140. Alternatively, second portion 620 may be positioned in any location that enables adhesive layer 600 to function as described herein.
• first portion 610 functions as an outer portion that extends substantially along edge 170 of patch 1 10
• second portion 620 functions as an inner portion that is at least partially circumscribed by first portion 610.
• second portion 620 has a substantially polygonal shape 710 that extends substantially along a radius 720 of arm 140 and is substantially centered radially within arm 140.
• second portion 620 may have any shape and/or configuration and/or be positioned in any location that enables adhesive layer 600 to function as described herein.
• FIG. 8 is a schematic illustration of an exemplary disbond growth pattern 800 of patch 1 10.
• disbond growth pattern 800 has an initiation point 810 that is positioned adjacent to peak 180.
• pattern 800 spreads generally radially about initiation point 810. More specifically, in the exemplary embodiment, disbond growth pattern 800 spreads radially inward with respect to patch 1 10 to disbond, in sequential order, a first portion 820, a second portion 830, a third portion 840, and a fourth portion 850 of arm 140.
• growth pattern 800 is substantially isolated to only one arm 140 of patch 1 10.
• peel forces generally dissipate due to the converging and then diverging edges 170.
• disbond growth pattern 800 is substantially retarded and/or stalls after first, second, third, and fourth portions 820, 830, 840, and 850 are disbonded. That is, in the exemplary embodiment, disbonds that occur at a free edge of the bonded components are forced to grow within a segmented edge detail and generally do not propagate across a gap between segment details.
• edge 170 has a scalloped design that causes disbond growth pattern 800 to turn substantially in an opposite direction 860 about valley 190 for disbond growth pattern 800 to continue spreading across patch 1 10. That is, the disbond propagation progresses to a point where further propagation requires the delamination front to change direction from its original path. This change of direction will require additional energy or a change in the failure mode. This hesitation or stalling of the delamination front provides a failsafe characteristic to the joined or bonded components.
• the subject matter described herein relates generally to coupling mechanisms and, more particularly, to a peel-resistant patch that may be used to coupling a plurality of components together and/or repairing structures.
• the peel- resistant patch includes a plurality of arms that are positionable to facilitate restricting an edge disbond from spreading across a body of the patch. That is, the patch is robustly coupled to the structure and facilitates isolating and/or stopping an edge peel and/or an edge disbond from growing beyond one of the arms.
• use of the patch described herein facilitates increasing the reliability and/or efficiency of coupling a plurality of components together and/or repairing a structure.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Sheet Holders (AREA)
• Lining Or Joining Of Plastics Or The Like (AREA)
• Adhesive Tapes (AREA)
• Soil Working Implements (AREA)
• Coating Apparatus (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

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Citations (4)

Family Cites Families (11)

• 2011
  • 2011-10-07 US US13/269,062 patent/US8895130B2/en not_active Expired - Fee Related
• 2012
  • 2012-07-13 EP EP12750495.9A patent/EP2747988B1/en not_active Not-in-force
  • 2012-07-13 CA CA2848081A patent/CA2848081C/en not_active Expired - Fee Related
  • 2012-07-13 JP JP2014534561A patent/JP5954804B2/ja not_active Expired - Fee Related
  • 2012-07-13 KR KR1020197005470A patent/KR102055530B1/ko not_active Expired - Fee Related
  • 2012-07-13 WO PCT/US2012/046781 patent/WO2013052193A1/en not_active Ceased
  • 2012-07-13 CN CN201280048603.8A patent/CN103842163B/zh not_active Expired - Fee Related
  • 2012-07-13 KR KR1020147007451A patent/KR101954473B1/ko not_active Expired - Fee Related
• 2014
  • 2014-10-23 US US14/522,102 patent/US9440422B2/en not_active Expired - Fee Related

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