WO2014131010A1 - Modular assembly having press-fit fastener holes - Google Patents
Modular assembly having press-fit fastener holes Download PDFInfo
- Publication number
- WO2014131010A1 WO2014131010A1 PCT/US2014/018314 US2014018314W WO2014131010A1 WO 2014131010 A1 WO2014131010 A1 WO 2014131010A1 US 2014018314 W US2014018314 W US 2014018314W WO 2014131010 A1 WO2014131010 A1 WO 2014131010A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fastener
- press
- hole
- fit
- modular assembly
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/0004—Oilsumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/0004—Oilsumps
- F01M2011/0054—Fastening to the cylinder block
Definitions
- the present disclosure generally relates to fasteners, and more specifically, to fasteners that may be used to attach different modules or sub-assemblies together, such as a vehicle oil pan to an engine block.
- pre-positioned fasteners include various mechanical locking devices (e.g., split washers, nylon nuts, etc), threadlocking material (e.g., commercially available Loctite TM ), or captive fasteners, just to name a few examples.
- mechanical locking devices e.g., split washers, nylon nuts, etc
- threadlocking material e.g., commercially available Loctite TM
- captive fasteners just to name a few examples.
- these conventional pre-positioned fasteners require extra materials having extra weight and cost - and in some cases, may not retain the fastener's position, the fastener's orientation, or both. Summary
- a modular assembly having a press-fit fastener hole.
- the press-fit fastener hole includes a plurality of lobe regions; and a plurality of contact regions spaced between lobe regions for a press-fit engagement with a fastener having a first diameter, the contact regions collectively defining an imaginary second diameter that is less than or equal to the first diameter.
- a modular assembly configured to be coupled to another component.
- the modular assembly includes a pan having a flange with at least one hole therethrough; and at least one fastener press-fitted within the at least one hole.
- Each of the at least one holes includes: a plurality of lobe regions, and a plurality of contact regions, each contact region being located at an intersection of two or more lobe regions, wherein the press-fit engagement of the fastener and the hole is associated with an inner diameter of the hole as defined by the contact regions and an outer diameter of the fastener.
- FIG, 1 is an exploded perspective view of an engine assembly
- FIGS. 2 A and 2B are top views of an exemplary press-fit fastener hole that may be used with the engine assembly of FIG. 1 ;
- FIGS. 3A-3C are side views of a fastener, in this case a bolt, being installed in the exemplary press-fit fastener hole of FIGS. 2A and 2B, where in FIG. 3 A the fastener is not yet installed, in FIG. 3B the fastener is partially installed, and in FIG. 3C the fastener is completely installed;
- FIG. 3D is a cross-sectional view of the fastener of FIG, 3B;
- FIG. 4 is a flowchart illustrating an exemplar ⁇ ' method for providing a modular assembly with fasteners pre-installed in press-fit fastener holes;
- FIG. 5 A is a side view of a fastener and spacer being installed in another exemplary press-fit fastener hole, where the spacer and press-fit fastener hole work together to retain the fastener in place;
- FIG. 5B is a partial, cross-sectional view of the fastener, spacer, and press-fit fastener hole of FIG. 5A fully installed in an engine assembly;
- FIG. 5C is a top view of the spacer shown in FIG. 5A;
- FIGS. 6- 11 are top views of other exemplar ⁇ ' press-fit fastener holes
- FIG. 12A is a side view of a fastener and another spacer being installed in another exemplary press-fit fastener hole, where the spacer and press-fit fastener hole work together to retain the fastener in place;
- FIG, 12B is a partial, cross-sectional view of the fastener, spacer, and press-fit fastener hole of FIG. 12A fully installed in an engine assembly;
- FIG. 12C is a top view of the spacer shown in FIG. 12 A. Detailed Description
- modular assemblies modules or sub-assemblies
- the manufacturer may then combine with other parts so as to form a larger assembly or even a finished product.
- fasteners e.g., bolts, screws, etc.
- FIG. 1 For the exemplary engine assembly 10 illustrated in FIG. 1 , where an oil pan 12 is provided by a supplier with a number of fasteners 14 already installed and aligned in their respective holes so that the oil pan can be quickly and easily attached to an engine block 16.
- the manufacturer By receiving the oil pan 12 with the pre-installed fasteners 14 already inserted into the correct holes and ready for attachment, the manufacturer is able to more quickly and efficiently mount the oil pan 12 to the engine block 16.
- the manufacturer does not, for example, have to maintain its own inventory of bolts, nor does it have to take the time to retrieve a bolt from a storage bin, insert the bolt through the appropriate hole, and align the bolt so that it will mate with a corresponding mounting hole in the engine block bolt pattern.
- One challenge associated with providing modular assemblies, like the oil pan 12, with fasteners already in place is that, without any feature to the contrary, the fastener or bolt can simply fall out of the hole in the modular assembly or otherwise become misaligned.
- the press-fit fastener holes described herein are designed to address this challenge.
- Engine assembly 10 includes a modular assembly (e.g., an oil pan 12), an engine block 16, and an intervening gasket 18.
- the oil pan 12 is attached to the underside of the engine block 16 with a number of pre-installed fasteners 14 that are already retained and aligned in press-fit fastener holes 30 located around the perimeter of the oil pan, such as in a mounting flange 32. These fasteners 14 thread into corresponding holes 38 in an engine block mounting flange 36.
- a thin, complementary shaped gasket 18 is compressed between the oil pan 12 and the engine block 16 and seals a sump 34 located between those two parts, as is widely understood in the art.
- engine assembly 10 is only one potential application or use of the press-fit fastener holes described herein, as they may be used in any application (automotive or non-automotive) where it is desirable to provide a modular assembly with pre-installed fasteners so that the modular assembly can be more easily attached to other parts.
- press-fit fastener holes may be used include: transmission pans and timing belt, chain, gear, cam and/or valve covers; thus, the term pan should be construed broadly to include any suitable type of pan, cover, sump, lid, etc.
- the press-fit fastener hole 30 is designed to retain fasteners 14 in place via an interference fit (or press or friction fit) so that when the oil pan is received by a manufacturer from a supplier it is pre-assembled and ready for attachment to the engine block 16.
- the press-fit hole 30 may be a multi-lobal hole with at least three points or regions of contact or engagement 60 (e.g., 60a, 60b, 60c) so that the hole can provide an interference or press- fit engagement with a fastener 14 that is inserted therein.
- the contact regions 60a, 60b, 60c are cusps, however, as will be explained below, this is merely one embodiment.
- the contact regions may both retain the position of the fastener (i.e., prevent the bolt from simply falling out of the oil pan) and retain the alignment or orientation of the fastener (i.e., keep the bolt straight or aligned so that it is properly oriented for insertion through holes 40 and 38).
- the following description is directed to an embodiment where an oil pan 12 is provided with a number of fasteners 14 already pre-installed, but it is also possible to provide an oil pan / gasket combination with fasteners 14 pre-installed.
- the compression limiter holes 40 in gasket 18 may be press-fit fastener holes.
- the fasteners 14 may be used to maintain the oil pan 12 and gasket 18 together while they are shipped from the supplier to the manufacturer.
- the fastener hole 30 may be tri- lobular - i.e., having a shape defined by three lobe regions 62 (e.g., 62a, 62b, 62c).
- the lobe regions 62 may be adjacent to one another, and along an interior surface 64 of the hole 30, each lobe region may meet at contact regions 60 (e.g., the cusps each having a radially, inwardly directed point or index).
- the contact regions 60 define an imaginary circular, inner diameter D 3A (e.g., from about 6mm - 10mm) which corresponds to the diameter of the fastener, and the lobe regions 62 are circumscribed within an imaginary circular, outer diameter D 3B (e.g., from about 8mm - 12mm).
- the shape of the tri-lobular hole may be defined by three overlapping circles (a, b, c), and some of the points where the circles a, b, and c intersect may coincide with the contact regions 60.
- fastener 14 which is to be received in the press-fit fastener hole 30 is an attachment feature, such as a bolt or a screw, that is used to securely mount the oil pan 12 and gasket 18 to the underside of the engine block 16.
- fastener 14 is a bolt and includes a head portion 80 coupled to a threaded shank portion 82 which extends axially therefrom.
- the head portion 80 can be larger in diameter than the shank portion 82 so that it does not pass through the hole in which the fastener is inserted and, depending on the particular application, can include any number of engagement features.
- the head portion 80 has a hex configuration for engagement by a wrench or the like, but it may alternatively be configured as a carriage bolt, shoulder bolt, lag bolt, lug bolt, head bolt, machine screw, socket screw, set screw, or any other type of suitable fastener.
- the shank portion 82 is an elongated shank or shaft that axially extends away from the head portion 80 and, according to this example, includes threaded section 84 and a pilot section 86.
- the exterior or male threads 88 of the threaded section 84 are designed to interact with interior or female threads in the mounting holes 38 in the engine block bolt pattern, as illustrated in FIG.
- the threaded section 84 of the fastener has an outer diameter ( OD F ) that may, by way of example, be between about 6mm and 10mm. In one exemplar ⁇ ' embodiment, the outer diameter OD F is 1-10% larger than the inner diameter D 3 A defined by the contact regions 60 of the tri- lobu!ar hole 30.
- the pilot section 86 which is optional, has a smooth exterior surface that is smaller in diameter than the threaded section and is intended to help guide the tip of the fastener 14 into the hole in which it is being inserted. In other embodiments, the shank portion 82 does not include a pilot section and is threaded all the way to its distal end.
- the fastener 14 can be installed to either a threaded blind or through hole in the mating component.
- the fastener 14 may have various sizes, dimensions, configurations, material compositions, etc. and may be any type of known bolt, screw or the like.
- the length, the thread count, the threads per inch (TPI), the pitch, the lead, the units (Metric or English), the head or shank portion configuration, or any other suitable parameter may vary according to the particular application in which the fastener 14 is being used.
- the fastener described herein is not limited to any one type of fastener or bolt, the exemplar ⁇ ' fastener 14 is an M6 or M8 bolt.
- Fastener 14 may be made of various metals (or metal alloys), plastics, or even ceramics, and the fastener may or may not be coated (e.g., zinc plating, galvanizing, chrome plating, etc.), to cite a few examples.
- the engagement between the contact regions 60 and the threads 88 of the fastener 14 should adequately support the weight of the fastener 14 once it is located within the hole 30; if it does not, the bolt could simply fall back through the hole (e.g., at the time of engagement or later during shipment).
- the engagement between the contact regions 60 and the threads 88 should not be so great as to prevent the bolt from being later fully installed or threaded into the hole 38 of the engine block; e.g., the interference fit between the bolt and the contact regions should not be so great as to damage the threads 88 in such a way that the threads fail to engage the female threads within the engine block hole 38.
- the engagement should not be so excessive so as to produce high or faulty bolt torque readings at installation. In some embodiments, this engagement should be sufficient to retain a relatively perpendicular alignment of the fastener to the mounting flange 32 so that the manufacturer later does not need to carry out an additional alignment step.
- the engagement between the contact regions 60 and the threads 88 of the fastener 14 may result in an angular displacement or misalignment of the bolt (i.e., the angle between a Sine perpendicular to the surface of the gasket 18 and the central axis of the bolt) that is less than or equal to about 5°; in some instances, it may be less than or equal to 1°. If the angular misalignment is greater than this, the bolt may not line up properly with the corresponding hole 40 in the gasket and the engine block hole 38.
- the contact regions 60 may have female threads thereon sized to receive the fastener threads 88, and the fastener may be rotated into the press-fit fastener hole 30.
- FIG. 4 illustrates an exemplary method 100 for providing a modular assembly, in this case an oil pan, from a supplier to a manufacturer where the modular assembly already has one or more pre-installed fasteners 14.
- the supplier receives or maintains a collection of fasteners 14; in this case threaded bolts.
- the supplier inserts or installs the fasteners 14 into the press-fit fastener holes 30 of a module by press-fitting them therethrough, creating a modular assembly (step 102).
- the holes 30 are located in the oil pan mounting flange 32 and the fasteners 14 are inserted to a predetermined depth within the holes. This step may be performed manually or it may be automated with manufacturing equipment.
- the fastener When installing a fastener 14 into a press-fit fastener hole 30, the fastener should be inserted far enough into the hole such that the threads 88 engage each of the contact regions 60. This instal lation of the fastener 14 into the press-fit fastener hole 30 may automatically align the bolt in an upright and aligned orientation, or the bolt may need to be manipulated so that it is properly aligned. Again, manual or automated means may be used for carrying this out. At this point, the gasket 1 8 may or may not be provided with the oil pan 12 (e.g., press- fitting the fasteners 14 into the holes 40).
- the modular assembly with its pre-installed fasteners may be shipped or otherwise provided to the manufacturer for subsequent assembly operations (step 103).
- the manufacturer may then attach the oil pan 12 and gasket 18 to the underside of the engine block 16, as described above, and can do so in a more efficient manner due to the fasteners or bolts being already installed, aligned and ready to go.
- the illustrated engine block, gasket, oil pan, and fasteners are provided only by way of example.
- the engine block may be any other component or assembly.
- the oil pan may be various other pans, covers, trays, plates, modular assemblies, etc.
- the fastener may also vary as previously described.
- Other embodiments of the modular assembly, fastener and/or press-fit fastener holes also exist.
- like reference numerals indicate like or similar elements or functions.
- FIGS. 5A-5C show a fastener 114 and a spacer 120 that may be used for improved alignment of the fastener or bolt.
- the spacer 120 is a generally hollow cylinder having a first outer diameter OD S1 (which may be less than, greater than, or equal to the diameter of the head portion 1 80 of the fastener; here, it is illustrated as being approximately equal to the diameter of the head portion).
- a first end 122 of the spacer may be nearest the head portion 180 while a second end 124 may be furthest away from the head portion.
- the outer diameter OD S2 of the second end 124 may be smaller than that of the first end 122, having a shoulder 126 therebetween (i.e., OD S2 ⁇ OD S1 ).
- Multiple gaps 128 may extend axially from the second end 124 towards the shoulder 126 (e.g., the three illustrated gaps may correspond with the contact regions 60 in the hole 30) (see also FIG. 5C).
- the second outer diameter ODs 2 may be sized to fit within the press-fit fastener hole 30 in the oil pan mounting flange 32 while the gaps 128 are co-located around the contact regions 60 so that the second end 124 does not interfere with the press fitting of the fastener 114 in the hole 30.
- the second end 124 of the spacer may also be press-fit into the lobe regions 62 of the hole during installation.
- An inner diameter IDs of the spacer should be large enough so that the spacer can fit o ver top of the shank portion 182 of the fastener 114,
- FIG. 5B is similar to FIG. 3C in that it illustrates the fastener with the spacer 120 fully installed in the engine block 16 securing the oil pan 12 and gasket 18 therebetween. It also illustrates the second outer diameter OD S2 within the press-fit fastener hole 30 and the shoulder 126 mated or resting against the flange 32 near the hole 30.
- This nested relationship may improve the alignment of bolt 114 so that it is more upright, and the spacer 120 may be retained during final installation into the engine block (FIG. 5B) so that the manufacturer does not ha ve to perform an additional step of removing the spacer 120.
- the spacer's inner diameter may have a multi-lobular aiTangement, similar to that shown in FIGS. 2 A and 2B,
- the inner diameter may have lobes 62a, 62b, 62c and contact regions 60a, 60b, 60c.
- the diameter D 3A may be suitably sized for a press-fit engagement with the threads of the fastener 182.
- the second end 124 may be continuously circular; i.e., it may not have gaps 128 (as described with respect to FIGS. 5A-5C).
- the holes 30' in the flange 32 may be circular and sized to receive the second end 124' of the spacer 120'.
- the second end 124' may be clinched or coined into place, as understood by skilled artisans.
- a portion of the second end 124' may be folded o ver the opposing side of the flange 32, as shown in FIG. 12A.
- means for securing the spacer 120' are possible as well - including press-fitting the spacer into the hole 30'. In the implementations shown in FIGS.
- the spacer may improve the grip length of the bolt thereby improving alignment as the axial length of the spacer (120, 120') may be greater than axial depth of the flange 32. Further, when the oil pan 12 is assembled to the engine block 16, spacer implementations place the fastener 182 in tension thereby enhancing the clamping force on the pan.
- the spacers may be composed of any suitable material including metai(s) or plastic(s).
- a spacer 620 may have any shape (e.g., circular); and the hole in the mounting flange may have a complementary shape (e.g., circular).
- the outer diameter of the spacer near the second end 624 may be slightly larger than the diameter of the mounting flange hole so that the spacer may be press-fit therein, while the spacer 620 may be generally cylindrical! ⁇ ' hollow therethrough, the interior surface 644 of the spacer may have axially extending projections which each extend radially inwardly to a tip or contact region 660.
- the contact regions 660 may define the diameter D 3A which is slightly smaller than the fastener so that the fastener may be press fit therethrough once the spacer 620 is installed in the mounting flange.
- the press-fit fastening holes may have different shapes.
- the contact regions 60 may be flat rather than angular cusps.
- the fastening hole 730 may be triangular and have contact regions 760.
- the contact regions 860 may have indexes or tips or projections (e.g., indexes extending from a circular hole 830 in the mounting flange).
- the number of contact regions may vary; e.g., there may be four, five, six, or more contact regions.
- four contact regions 960 are illustrated and the hole 930 is square.
- five contact regions 1060 are illustrated and the hole 1030 is star-shaped.
- six contact regions 1 160 are illustrated and the hole 1130 is hexagonal.
- the lobe regions need not be circular, but may have various shapes and sizes.
- annular retention and alignment features made from low density foam or other suitable materials may be inserted around the bolt to assist with retaining and aligning the bolt within the hole, as described in U.S. patent application serial number 61/807,008 which is hereby incorporated by reference in its entirety.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Connection Of Plates (AREA)
- Multi-Conductor Connections (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MX2015009628A MX363897B (en) | 2013-02-25 | 2014-02-25 | Modular assembly having press-fit fastener holes. |
DE112014000377.8T DE112014000377T5 (en) | 2013-02-25 | 2014-02-25 | Modular assembly with press fit fastener recesses |
US14/766,088 US20150377100A1 (en) | 2013-02-25 | 2014-02-25 | Modular Assembly Having Press-Fit Fastener Holes |
CN201480010244.6A CN105026705B (en) | 2013-02-25 | 2014-02-25 | Modular assembly with press-in cooperation fastener hole |
JP2015559268A JP6134011B2 (en) | 2013-02-25 | 2014-02-25 | Modular assembly with press-fit fastening holes |
US16/450,329 US20190309667A1 (en) | 2013-02-25 | 2019-06-24 | Modular Assembly Having Press-Fit Fastener Holes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201361768916P | 2013-02-25 | 2013-02-25 | |
US61/768,916 | 2013-02-25 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/766,088 A-371-Of-International US20150377100A1 (en) | 2013-02-25 | 2014-02-25 | Modular Assembly Having Press-Fit Fastener Holes |
US16/450,329 Continuation US20190309667A1 (en) | 2013-02-25 | 2019-06-24 | Modular Assembly Having Press-Fit Fastener Holes |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014131010A1 true WO2014131010A1 (en) | 2014-08-28 |
Family
ID=51391912
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2014/018314 WO2014131010A1 (en) | 2013-02-25 | 2014-02-25 | Modular assembly having press-fit fastener holes |
Country Status (6)
Country | Link |
---|---|
US (2) | US20150377100A1 (en) |
JP (1) | JP6134011B2 (en) |
CN (1) | CN105026705B (en) |
DE (1) | DE112014000377T5 (en) |
MX (1) | MX363897B (en) |
WO (1) | WO2014131010A1 (en) |
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CN107002518A (en) * | 2014-11-21 | 2017-08-01 | 舍弗勒技术股份两合公司 | Fulcrum post for the spring guide in camshaft phaser |
CN107223182A (en) * | 2015-03-25 | 2017-09-29 | 伊希欧1控股有限公司 | The shaft-hub connection of shaft-hub connection, especially connecting rod |
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2014
- 2014-02-25 US US14/766,088 patent/US20150377100A1/en not_active Abandoned
- 2014-02-25 WO PCT/US2014/018314 patent/WO2014131010A1/en active Application Filing
- 2014-02-25 JP JP2015559268A patent/JP6134011B2/en not_active Expired - Fee Related
- 2014-02-25 CN CN201480010244.6A patent/CN105026705B/en not_active Expired - Fee Related
- 2014-02-25 DE DE112014000377.8T patent/DE112014000377T5/en not_active Withdrawn
- 2014-02-25 MX MX2015009628A patent/MX363897B/en active IP Right Grant
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2019
- 2019-06-24 US US16/450,329 patent/US20190309667A1/en not_active Abandoned
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US4667628A (en) * | 1986-03-06 | 1987-05-26 | General Motors Corporation | Oil pan isolation mounting and seal |
US4677947A (en) * | 1986-06-30 | 1987-07-07 | Beaumont Bousquet | Clamped, readily-removable oil pan without drain hole |
JPH10148116A (en) * | 1996-11-20 | 1998-06-02 | Fuji Heavy Ind Ltd | Installation structure of engine oil strainer |
US6371073B1 (en) * | 2000-11-02 | 2002-04-16 | Caterpillar Inc. | Isolated cover with independent sealing system |
WO2012062728A1 (en) * | 2010-11-08 | 2012-05-18 | Baier & Michels Gmbh & Co. Kg | Thread-producing nut, blank for manufacturing the nut and screwed connection composed of nut and bolt |
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CN107002518A (en) * | 2014-11-21 | 2017-08-01 | 舍弗勒技术股份两合公司 | Fulcrum post for the spring guide in camshaft phaser |
CN107002518B (en) * | 2014-11-21 | 2020-09-04 | 舍弗勒技术股份两合公司 | Bearing pin for spring guide in camshaft phaser |
CN107223182A (en) * | 2015-03-25 | 2017-09-29 | 伊希欧1控股有限公司 | The shaft-hub connection of shaft-hub connection, especially connecting rod |
CN107223182B (en) * | 2015-03-25 | 2019-11-08 | 伊希欧1控股有限公司 | Shaft-hub connection and connecting rod with shaft-hub connection |
Also Published As
Publication number | Publication date |
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DE112014000377T5 (en) | 2015-09-24 |
US20150377100A1 (en) | 2015-12-31 |
MX2015009628A (en) | 2015-11-30 |
CN105026705A (en) | 2015-11-04 |
MX363897B (en) | 2019-04-05 |
US20190309667A1 (en) | 2019-10-10 |
JP6134011B2 (en) | 2017-05-24 |
CN105026705B (en) | 2018-01-02 |
JP2016515178A (en) | 2016-05-26 |
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