CN103147978B - Rotating machinery - Google Patents

Rotating machinery Download PDF

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Publication number
CN103147978B
CN103147978B CN201210519669.2A CN201210519669A CN103147978B CN 103147978 B CN103147978 B CN 103147978B CN 201210519669 A CN201210519669 A CN 201210519669A CN 103147978 B CN103147978 B CN 103147978B
Authority
CN
China
Prior art keywords
bearing
running shaft
housing
tap hole
fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201210519669.2A
Other languages
Chinese (zh)
Other versions
CN103147978A (en
Inventor
永沼贵宽
川端伦明
安藤之人
加藤大嗣
中村祐树
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Advics Co Ltd
Original Assignee
Denso Corp
Advics Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Denso Corp, Advics Co Ltd filed Critical Denso Corp
Publication of CN103147978A publication Critical patent/CN103147978A/en
Application granted granted Critical
Publication of CN103147978B publication Critical patent/CN103147978B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/08Sealings
    • F04D29/10Shaft sealings
    • F04D29/106Shaft sealings especially adapted for liquid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/08Sealings
    • F04D29/10Shaft sealings
    • F04D29/12Shaft sealings using sealing-rings
    • F04D29/126Shaft sealings using sealing-rings especially adapted for liquid pumps

Abstract

Rotating machinery comprises running shaft and the housing around running shaft, and this housing is provided with fluid reservoir and is formed with accommodating part.This rotating machinery also comprises the bearing being arranged on also supporting rotating shaft in accommodating part, and is arranged on the annular seal component between fluid reservoir and bearing, flows through the gap between running shaft and housing with suppression fluid.Housing is formed: tap hole, this tap hole be provided for air with by the sealing component in housing and bearing around space between be communicated with, and for leaking from fluid reservoir and entering the fluid expulsion in this space through sealing component; And atmosphere introducing hole, this atmosphere introducing hole is used for outside air to be incorporated in this space to keep this space to be in atmospheric pressure.

Description

Rotating machinery
Technical field
The present invention relates to a kind of rotating machinery, this rotating machinery is provided with the sealing component arranged around its running shaft.
Background technique
Japanese Patent Application Laid-Open 2008-49743 describes a kind of rotary pump equipment as rotating machinery, and it is provided with: sealing component, sealing component be used for anti-fluid flow through its running shaft and its around running shaft housing between gap; And bearing, this bearing bearing seal component and running shaft.This rotary pump equipment is contained in the metal shell being configured for the actuator that brake fluid pressure controls, and is configured to utilize a running shaft to drive accommodating two rotary pumps in the housing.In this rotary pump equipment, running shaft is bearing in the rear side of housing by bearing.Oil sealing as sealing component is arranged on the more inner position of the ratio bearing of housing around running shaft, to prevent brake fluid from rotation pump side through the clearance leakage housing and running shaft.
But, this oil sealing is set as described in above-mentioned patent documentation brake fluid can not be suppressed completely through the clearance leakage housing and running shaft.Therefore, brake fluid also flows out bearing further towards bearing leakage situation through oil sealing may occur, and result, the lubricating grease of filling within the bearing is rinsed, thus hampers the Smooth Rotation of bearing.Therefore, even if prevent the lubricating grease of bearing to be rinsed when brake fluid is also still necessary to take some measures through oil sealing and towards bearing leakage.
The problems referred to above may in office how about under rotating machinery in occur, this rotating machinery has: the room storing accommodating fluid in the housing; Penetrate the running shaft of this room; And arrange for the sealing component of suppression fluid from this room through the clearance leakage housing and running shaft.
Summary of the invention
Illustrative embodiments provides a kind of rotating machinery, and this rotating machinery comprises:
Running shaft;
Around the housing of running shaft, this housing is provided with the fluid reservoir for store fluid and is formed with accommodating part, more outer than fluid reservoir on the axial direction that described accommodation section is arranged in running shaft;
The bearing of supporting rotating shaft, this bearing is arranged in accommodating part, has inner ring, outer ring and is arranged on the multiple rolling elements between inner ring and outer ring, and be filled with lubricating grease; And
Annular seal component, this annular seal component is arranged between the bearing in fluid reservoir and accommodating part, flows through the gap between running shaft and housing with suppression fluid,
Wherein,
This housing is formed: tap hole, this tap hole is arranged on the position below the axial centre of running shaft, with make air with by the bearing in housing and sealing component around space between be communicated with, and will leak from fluid reservoir and enter the fluid expulsion in this space through sealing component; And
Atmosphere introducing hole, this atmosphere introducing hole is used for outside air to be incorporated in this space to keep this space to be in atmospheric pressure.
According to this illustrative embodiments, provide so a kind of rotating machinery: namely, this rotating machinery can suppress to be stored in fluid in the fluid reservoir be arranged in its housing by the clearance leakage between its running shaft and inwall of housing, even and if fluid leak and the lubricating grease be filled in the bearing of supporting rotating shaft still can be suppressed to be rinsed towards bearing flowing.
By including the following description of accompanying drawing and claim, other advantages of the present invention and feature will become obvious.
Accompanying drawing explanation
In the accompanying drawings:
Fig. 1 is partial enlarged drawing, shows the partial cross section of rotating machinery according to the embodiment of the present invention;
Fig. 2 be in Fig. 1 by dotted line around the partial enlarged drawing of part; And
The sectional view that Fig. 3 A and Fig. 3 B is the part shown in Fig. 2, described sectional view is used for the tap hole 4e of this part and comparing of diverse location relation between chamfered section.
Embodiment
Fig. 1 is partial enlarged drawing, shows the partial cross section of rotating machinery 1 according to the embodiment of the present invention.Fig. 2 be in Fig. 1 by dotted line around the partial enlarged drawing of part.Vertical direction when installation in position of vertical direction (above-below direction) shown in Fig. 1 and substantially horizontal and rotating machinery 1 and substantially horizontal consistent.
As shown in fig. 1, rotating machinery 1 comprises running shaft 3 and housing 4, and running shaft 3 is connected to the live axle (not shown) of motor 2, and housing 4 is formed with the central hole 4b be communicated with the fluid chamber for store fluid.
Rotating machinery 1 is by be inserted in the patchhole 5a that is formed in metal shell 5 and to be fixed to shell 5.Hereinafter, rotating machinery 1 is inserted into direction in patchhole 5a and is called as direction of insertion.Rotating machinery 1 can be such as rotary pump equipment.When rotating machinery 1 is rotary pump equipment, rotating machinery 1 can be arranged on brake fluid and control in actuator.In this case, fluid reservoir 4a is used as the chamber of accommodating two rotary pumps, and rotating machinery 1 is for controlling the pressure of the brake fluid being supplied to wheel cylinder by Brake pipe.
The running shaft 3 of rotating machinery is supported by bearing 6, and this bearing 6 is arranged on the rear end being positioned at motor 2 side of housing 4, more specifically, be arranged on housing 4 in an insertion direction than fluid reservoir 4a rear side place more rearward.There is accommodating part 4c at housing 4 its rear portion place in an insertion direction by boring, and the internal diameter of this accommodating part 4c is greater than the diameter of running shaft 3.Bearing 6 is arranged in the 4c of accommodating part.That is, bearing 6 is assemblied in the accommodating part 4c in the axially outside being formed at fluid storage portion 4a.
Bearing 6 is not limited to any concrete structure.In this embodiment, use narrow width ball bearing as bearing 6.More specifically, the bearing 6 rolling element 6c that comprises inner ring 6a, outer ring 6b and be arranged between inner ring 6a and outer ring 6b.Lubricating grease (not shown) is filled between inner ring 6a and outer ring 6b.Running shaft 3 is supported by bearing 6 in a case where: outer ring 6b inserts and to be fixed in the accommodating part 4c of housing 4 and running shaft 3 is assemblied in the hole of inner ring 6a.
Bearing 6 also comprises sealing plate 6d.Sealing plate 6d is arranged on two axial end portions of inner ring 6a and outer ring 6b, with cover by inner ring 6a and outer ring 6b around space and by bearing 6 and the sealing component 7 that describes subsequently around space 8 between, and to cover between bearing 6 and outside.Because bearing 6 is arranged on rear side along direction of insertion, therefore sealing plate 6d be arranged so that the brake fluid (hereinafter can referred to as fluid) that can suppress to leak from fluid reservoir 4a leaks into outside further by bearing 6.
The sealing component 7 of circular in configuration is arranged on the front side place more forward than bearing 6 in an insertion direction of housing 4 around running shaft 3, that is, be arranged on 4c side, fluid storage portion.Sealing component 7 is also arranged in the accommodating part 4c of housing 4.Sealing component 7 and bearing 6 according to this order insert and are assembled in the 4c of accommodating part.
Sealing component 7 is made up of sheet metal 7a, resilient member 7b and helical spring 7c.Sheet metal 7a and the resilient member 7b of circular in configuration form.Resilient member 7b is cross section is towards the annular construction member of the V-arrangement of bearing 6 extension, and at least contacts with the inwall of housing 4 and the periphery of running shaft 3.Helical spring 7c produces elastic force resilient member 7b being pressed against running shaft 3.By arranging the sealing component 7 with said structure, the gap between housing 4 and running shaft 3 is sealed, and flows through the gap housing 4 and running shaft 3 to suppress the fluid be stored in fluid storage portion 4a towards bearing 6.
The part place that diameter is being provided with bearing 6 of the accommodating part 4c of housing 4 reduces.Sealing component 7 is assemblied in this reduced diameter portion.Boundary portion convergent between reduced diameter portion and the part being provided with bearing 6 is to have tapered surface 4d.The inclined-plane of tapered surface 4d contributes to inserting sealing component 7.
As mentioned above, because sealing component 7 is arranged between bearing 6 and fluid reservoir 4a, therefore, it is possible to suppress the fluid be stored in fluid reservoir 4a leak into by sealing component 7 and bearing 6 around space 8 in.But because the sealing function of sealing component 7 can not leak by suppression fluid completely, a certain amount of fluid be therefore stored in fluid reservoir 4a may leak in space 8.In order to the fluid expulsion that will have leaked is outside rotating machinery 1, housing 4 is formed with the tap hole 4e and atmosphere introducing hole 4f that are communicated with space 8.
Tap hole 4e is positioned at the below at the center of the running shaft 3 of housing 4.Tap hole 4e is formed by Drilling operation with the circular port extended along the radial direction of running shaft 3.Tap hole 4e must be communicated with space 8 and compared with the sealed department between sealing component 7 and the inwall of housing 4 closer to the side of bearing 6.In this embodiment, as shown in Figure 2, tap hole 4e is formed as making the front end being positioned at sealing component 7 side of bearing 6 to exceed the edge P being positioned at bearing 6 side of tap hole 4e, thus is positioned at inside tap hole 4e, and tap hole 4e is overlapping with tapered surface 4d.
Atmosphere introducing hole 4f is used for keeping space 8 to be in atmospheric pressure by being communicated with space 8.Atmosphere introducing hole 4f can be formed in introduce outside air in any part of housing 4, and this outside air is unlikely by the flow impedance leaked when the sealing component 7.In this embodiment, atmosphere introducing hole 4f is formed in above running shaft 3.Atmosphere introducing hole 4f is formed by Drilling operation with the circular port extended along the radial direction of running shaft 3.
When tap hole 4e and atmosphere introducing hole 4f has identical diameter, they can be formed by utilizing same driling machine, to simplify manufacture process.Such as, when they were positioned at when running shaft 3 is with 180 degree of relative positions, they can be formed by a Drilling operation.When they are not positioned at when running shaft 3 is with 180 degree of relative positions, they can be formed by axial centre roll-shell 4 order around running shaft 3.Tap hole 4e and atmosphere introducing hole 4f not necessarily must have identical diameter.But tap hole 4e must have enough large diameter and block with the film not being braked fluid, and atmosphere introducing hole 4f must can introduce the outside air of q.s.
As explained above, the rotating machinery 1 of this mode of execution has following structure: be wherein formed with tap hole 4e to be communicated with the space 8 between sealing component 7 with the bearing 6 in housing 4.Therefore, even if the fluid be stored in fluid reservoir 4a leaks in space 8 through sealing component 7, this fluid still can be discharged by tap hole 4e.In addition, can atmospheric pressure be remained on owing to being provided with atmosphere introducing hole 4f to make space 8, even if therefore fluid blocks tap hole 4e, still can pass through tap hole 4e reliably displacement fluids.
By way of parenthesis, being provided with of atmosphere introducing hole 4f helps reduce the size of rotating machinery 1.If do not arrange atmosphere introducing hole 4f, then the internal diameter of tap hole 4e must be blocked by the sufficiently large oil film that just can not be braked fluid.In this embodiment, owing to being provided with atmosphere introducing hole 4f, therefore the internal diameter of tap hole 4e can do less, prevents the oil film of brake fluid simultaneously.Therefore, according to this mode of execution being provided with atmosphere introducing hole 4f, the internal diameter of tap hole 4e can be reduced, and thus the size of reduction rotating machinery 1.
In addition, according to this mode of execution, wherein sealing component 7 suppresses the fluid be stored in fluid storage portion 4a by the clearance leakage between housing 4 and running shaft 3, even if fluid leaks towards bearing 6 through sealing component 7, the lubricating grease be filled in bearing 6 still can be suppressed to be rinsed.In addition, also can suppress through the fluid of bearing 6 and enter in motor 2 from the lubricating grease that bearing 6 rinses out.
In rotating machinery 1 preferably, bearing 6 is provided with sealing plate 6d.The further suppression fluid that arranges of sealing plate 6d to enter in bearing 6 thus to suppress the lubricating grease be filled in bearing 6 to be rinsed further.But if the fluid entering space 8 through sealing component 7 can go out without road, then the setting of sealing plate 6d just can not enter in bearing 6 by suppression fluid completely.In this embodiment, owing to being provided with tap hole 4e and atmosphere introducing hole 4f, even if therefore fluid flows towards bearing 6 through sealing component 7, the lubricating grease be filled in bearing 6 still can be prevented further to be rinsed.
As shown in Figure 2, the end being positioned at sealing component 7 side of the outer ring 6b of bearing 6 is projected into inside tap hole 4e.If on the axial direction that the end surface being positioned at sealing component 7 side of outer ring 6b is positioned in running shaft 3 compared with the edge being positioned at bearing 6 side of tap hole 4e closer to the side relative with sealing component 7, then the inwall of accommodating part 4c gets involved the amount corresponding with distance therebetween between the end surface and the edge of tap hole 4e of outer ring 6b.In this case, the end surface of the fluid sticks space 8 to bearing 6 is leaked into from fluid reservoir 4a, and fall from end surface, result fluid sticks to the lowest part parallel with the axial direction of running shaft of the curved surface of the inwall of accommodating part 4c, and easily accumulates in there by surface tension.According to this mode of execution with said structure, part that the inwall of accommodating part 4c can be reduced fully, that get involved between the end surface and the edge of tap hole 4e of outer ring 6b.Therefore, the liquid leaked into space 8 from fluid reservoir 4a can easily be arrived tap hole 4e and easily be discharged by tap hole 4e.
Above-mentioned advantageous effects can obtain in a case where: the position consistency at the position being arranged in the end surface of sealing component 7 side of the outer ring 6b of bearing 6 and the edge (Fig. 2 illustrates with P) being positioned at bearing 6 side of tap hole 4e, or is projected into the opening inner side of tap hole 4e.But the outward edge of outer ring 6b can in the position chamfering of the end of bearing 6.In this case, preferably, the part of chamfering to be positioned at the opening inner side of the tap hole 4e shown in Fig. 3 A.If this is because the position being positioned at the end of sealing component 7 side of bearing 6 is too close or consistent with the position being positioned at the edge of bearing 6 side of tap hole 4e, as shown in Figure 3 B, then probably between chamfered section and the inwall of accommodating part 4c, produce depressed part, and fluid to enter in this depressed part thus the flowing of interference fluid.Therefore, if want the part of chamfering to be positioned to eliminate this depressed part inside tap hole 4e, then fluid just can flow in tap hole 4e reposefully.
In this embodiment, tap hole 4e is formed as overlapping with tapered surface 4d.This makes to become possibility below: through sealing component 7 fluid can arrive accommodating part 4c inwall curved surface the lowest part parallel with the axial direction of running shaft before flow into reposefully in tap hole 4e.
By way of parenthesis, the fluid storage of having discharged is in not shown fluid reservoir.Can by forming gap between shell 5 and housing 4 or between shell 5 and motor 2 or forming hole and form fluid passage in shell 5.
Other mode of executions
Naturally, various remodeling as described below can be made to above-mentioned mode of execution.
In the above-described embodiment, sealing component 7 is made up of sheet metal 7a, resilient member 7b and helical spring 7c.But sealing component 7 can be any annular seal component that can carry out sealing between running shaft 3 and housing 4.Rotating machinery 1 described above is rotary pump equipment.But the present invention is applicable to any rotating machinery needing to flow through the annular seal component in the gap between running shaft and the housing of running shaft and the bearing of supporting rotating shaft for suppression fluid.
Preferred implementation illustrated is above the example of the invention of the application, and the invention of the application is only by hereafter claims description.Should be understood that, those skilled in the art can expect the remodeling can making preferred implementation.

Claims (4)

1. a rotating machinery, comprising:
Running shaft;
Around the housing of described running shaft, described housing is provided with the fluid reservoir for store fluid and is formed with accommodating part, more outer than described fluid reservoir on the axial direction that described accommodation section is arranged in described running shaft;
Support the bearing of described running shaft, described bearing is arranged in described accommodation section, has inner ring, outer ring and is arranged on the multiple rolling elements between described inner ring and described outer ring, and be filled with lubricating grease; And
Annular seal component, described annular seal component is arranged between the described bearing in described fluid reservoir and described accommodation section, flows through the gap between described running shaft and described housing with suppression fluid,
Wherein,
Described housing is formed: tap hole, described tap hole is arranged on the position below the axial centre of described running shaft, with make air with by the described bearing in described housing and described sealing component around space between be communicated with, and will leak from described fluid reservoir and enter the fluid expulsion in described space through described sealing component; And
Atmosphere introducing hole, described atmosphere introducing hole is used for outside air to be incorporated into keep described space to be in atmospheric pressure in described space, and
Wherein, the end surface being positioned at described sealing component side of described outer ring is consistent with the edge being positioned at described bearing side of described tap hole or be projected into the opening inner side of described tap hole,
Described tap hole and described atmosphere introducing hole are the circular port with same diameter, and
Described tap hole and described atmosphere introducing hole are positioned at across described running shaft with 180 degree of relative positions, and described tap hole and described atmosphere introducing hole are perpendicular to described running shaft simultaneously.
2. rotating machinery according to claim 1, wherein, the periphery chamfering being positioned at described sealing component side of the described outer ring of described bearing is to have chamfered section, and described chamfer site is in the described opening inner side of described tap hole.
3. rotating machinery according to claim 1, wherein, described bearing comprises sealing plate, described sealing plate be used for by described inner ring and described outer ring around space and by described bearing and described sealing component around described space between seal.
4. rotating machinery according to claim 1, wherein,
Described accommodation section is be formed in the circular port in described housing, and described circular port has the internal diameter larger than the diameter of described running shaft,
Described sealing component and described bearing are sequentially assembled in described accommodation section,
The described internal diameter of described accommodation section reduces at the reduced diameter portion place of described accommodation section, and described sealing component is arranged in described reduced diameter portion, and
The boundary convergent of described housing between described reduced diameter portion and the part being provided with described bearing is to have tapered surface, and described tapered surface is overlapping with described tap hole.
CN201210519669.2A 2011-12-06 2012-12-06 Rotating machinery Expired - Fee Related CN103147978B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011267137A JP5573825B2 (en) 2011-12-06 2011-12-06 Rotating machine
JP2011-267137 2011-12-06

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Publication Number Publication Date
CN103147978A CN103147978A (en) 2013-06-12
CN103147978B true CN103147978B (en) 2016-01-06

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CN201210519669.2A Expired - Fee Related CN103147978B (en) 2011-12-06 2012-12-06 Rotating machinery

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US (1) US20130142648A1 (en)
JP (1) JP5573825B2 (en)
CN (1) CN103147978B (en)
DE (1) DE102012111843A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016095982A1 (en) * 2014-12-17 2016-06-23 Abb Technology Ltd An electric motor with a sealing system
CN111794977B (en) * 2020-06-18 2021-06-22 杭州西子泵业有限公司 Self-cleaning structure for mechanical seal of submersible sewage pump

Citations (6)

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Publication number Priority date Publication date Assignee Title
JPS591826U (en) * 1982-06-26 1984-01-07 日野自動車株式会社 Water pump for internal combustion engine
CN1469063A (en) * 2002-06-11 2004-01-21 �ٹ��� Discharge high-pressure axle seal element
JP2005307897A (en) * 2004-04-23 2005-11-04 Matsushita Electric Ind Co Ltd Compressor
EP1880934A2 (en) * 2006-07-19 2008-01-23 Honda Motor Co., Ltd Motorcycle
JP2010150958A (en) * 2008-12-24 2010-07-08 Kayaba Ind Co Ltd Vane pump
EP2284396A1 (en) * 2007-07-23 2011-02-16 Mitsubishi Heavy Industries, Ltd. Refrigerant compressor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2436897A1 (en) * 1978-09-25 1980-04-18 Mecanique Ind Int IMPROVEMENTS ON CENTRIFUGAL PUMPS
JP5082336B2 (en) 2006-08-22 2012-11-28 株式会社アドヴィックス Brake control device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS591826U (en) * 1982-06-26 1984-01-07 日野自動車株式会社 Water pump for internal combustion engine
CN1469063A (en) * 2002-06-11 2004-01-21 �ٹ��� Discharge high-pressure axle seal element
JP2005307897A (en) * 2004-04-23 2005-11-04 Matsushita Electric Ind Co Ltd Compressor
EP1880934A2 (en) * 2006-07-19 2008-01-23 Honda Motor Co., Ltd Motorcycle
EP2284396A1 (en) * 2007-07-23 2011-02-16 Mitsubishi Heavy Industries, Ltd. Refrigerant compressor
JP2010150958A (en) * 2008-12-24 2010-07-08 Kayaba Ind Co Ltd Vane pump

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Publication number Publication date
US20130142648A1 (en) 2013-06-06
JP2013119785A (en) 2013-06-17
CN103147978A (en) 2013-06-12
DE102012111843A1 (en) 2013-06-06
JP5573825B2 (en) 2014-08-20

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Effective date of registration: 20160603

Address after: Aichi Prefecture, Japan

Patentee after: ADVICS Co.,Ltd.

Address before: Aichi Prefecture, Japan

Patentee before: DENSO Corp.

Patentee before: ADVICS Co.,Ltd.

CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160106

CF01 Termination of patent right due to non-payment of annual fee