CN106706189A - Force measuring bolt - Google Patents
Force measuring bolt Download PDFInfo
- Publication number
- CN106706189A CN106706189A CN201611152695.0A CN201611152695A CN106706189A CN 106706189 A CN106706189 A CN 106706189A CN 201611152695 A CN201611152695 A CN 201611152695A CN 106706189 A CN106706189 A CN 106706189A
- Authority
- CN
- China
- Prior art keywords
- bolt
- mounting hole
- sensing element
- wire
- lead
- 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.)
- Pending
Links
- 238000012360 testing method Methods 0.000 claims abstract description 34
- 239000000853 adhesive Substances 0.000 claims description 13
- 230000001070 adhesive effect Effects 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 claims 2
- 238000005259 measurement Methods 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000005452 bending Methods 0.000 abstract description 2
- 238000011109 contamination Methods 0.000 abstract 1
- 238000013461 design Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0004—Force transducers adapted for mounting in a bore of the force receiving structure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to the technical field of bolt pretightening monitoring, and especially relates to a force measuring bolt. The force measuring bolt comprises a bolt body, a sensitive element and a protection device, and is characterized in that the bolt body is axially provided with a mounting hole, the sensitive element is arranged in the mounting hole, and an outgoing line of the sensitive element is used for being electrically connected with a wire of an external testing circuit; and the protection device is arranged at the open end of the mounting hole and used for protecting connection of the outgoing line and the wire of the external testing circuit. According to the force measuring bolt provided by the invention, the sensitive element is packaged in the mounting hole of the bolt body, so that influences imposed on measurement by external environmental factors such as the temperature and oil contamination, the bending moment and the torque can be reduced. Furthermore, the sensitive element is mounted along an axis line of the bolt body, so that height-precision measurement for an axial pretightening force of the bolt can be realized. In addition, the outgoing line of the sensitive element is protected through the protection device, so that the outgoing line can be avoided from being subjected to a pulling force and being broken, and the robustness of the test piece is improved.
Description
Technical field
The present invention relates to tools for bolts ' pretension monitoring technical field, more particularly to a kind of dynamometry bolt.
Background technology
Bolt can extend when being acted on by axial tension, and its internal generation strains accordingly.In the elastic range of material
Interior, the size of strain is linear with the size of pulling force suffered by bolt.Using the sensing element being made up of sensitive grid etc., by it
It is pasted onto on the measuring point of component securely, because measuring point is strained after member stress, sensitive grid also makes its electricity therewith deforming
Resistance changes, then measures its resistance variations size by instrumentation, and is converted to the strain value of measuring point.By the measurement for straining
With the demarcation of signal, the size of Axial stress in bolt more can be accurately obtained, so as to be the design related to Axial stress in bolt
Type selecting, assembly technology parameter determination etc. provide foundation.
The test of traditional Axial stress in bolt, is to paste 4 sensing elements on the surface of bolt, is accessed favour stone electricity
Bridge.By the frock of particular design, pretightning force is applied to bolt, rower is entered with the relation of pretightning force by gathering output signal
It is fixed, so as to realize the measurement to bolt pretightening.
But, this kind of test mode receives such environmental effects in bolt surface mount sensing element, the precision of test result
It is larger；The scheme of surface patch, it is impossible to exclude the influence of bolt moment of flexure and moment of torsion to test result；Test result receives environment, spiral shell
The factor such as bolt bending and torsion is larger, and the easy under tension of lead-out wire of sensing element is broken, the robustness of testing scheme
It is poor.
The content of the invention
Based on this, it is necessary to for the influence of bolt moment of flexure and moment of torsion to test result cannot be excluded；Test result receives ring
The factors such as border, bolts bend and torsion are larger, and sensing element the fracture of lead-out wire easy under tension, testing scheme it is strong
A kind of poor problem of strong property, there is provided dynamometry bolt.
Above-mentioned purpose is achieved through the following technical solutions：
A kind of dynamometry bolt, including bolt body, sensing element and protection device；Bolt body axially offers installation
Hole, sensing element is arranged in mounting hole, and the lead-out wire of sensing element is used to be electrically connected with the wire of external test circuitry；Protection
Device is arranged on the openend of mounting hole, the junction for protecting lead-out wire and the wire of external test circuitry.
In one of which embodiment, protection device includes flexible fastening seat, and hollow part is provided with flexible fastening seat
Position, hollow part is used for the junction of the wire for housing lead-out wire and external test circuitry, and by adhesive by lead-out wire with
The junction of the wire of external test circuitry is fixed on hollow part.
In one of which embodiment, flexible fastening seat is rubber fixed seat.
In one of which embodiment, rubber fixed seat is fixed on the head of bolt body by adhesive.
In one of which embodiment, protection device includes connection-peg；Connection-peg is arranged on the openend of mounting hole, inserts
Joint is used to be electrically connected with the lead-out wire of sensing element.
In one of which embodiment, connection-peg is threadedly attached in the openend of mounting hole.
In one of which embodiment, adhesive is filled between connection-peg and the openend of mounting hole.
In one of which embodiment, sensing element be in strip, and sensing element length direction and bolt body
Bearing of trend it is consistent.
In one of which embodiment, sensing element is rectangle, and sensing element center line along its length with
The axis of bolt body is located on the same line.
In one of which embodiment, sensing element is fixed in mounting hole by adhesive.
Above-mentioned dynamometry bolt, sensing element is packaged in the mounting hole of bolt body, so, it is possible to reduce temperature, oil
The external environmental factors such as dirt and moment of flexure and moment of torsion for the influence that measures, further, by sensing element along bolt body
Axis is installed, and can realize the height-precision measurement to bolt axial pre tightening force.In addition, protecting sensing element by protection device
Lead-out wire, lead-out wire under tension can be avoided and be broken, improve test block robustness.
Brief description of the drawings
The structural representation of the dynamometry bolt that Fig. 1 is provided for one embodiment of the invention；
The structural representation of the dynamometry bolt that Fig. 2 is provided for another embodiment of the present invention.
Wherein：
100- bolt bodies；
110- mounting holes；
200- sensing elements；
300- protection devices；
310- flexible fastenings seat；311- hollow parts；
320- connection-pegs.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, by the following examples, and with reference to attached
Figure, is further elaborated to dynamometry bolt of the invention.It should be appreciated that specific embodiment described herein is only used to
The present invention is explained, is not intended to limit the present invention.
It should be noted that when element is referred to as " being fixed on " another element, it can directly on another element
Or can also there is element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or may be simultaneously present centering elements.Conversely, when element be referred to as " directly existing " another element " on " when,
In the absence of intermediary element.Term as used herein " vertical ", " level ", "left", "right" and similar statement are
For illustrative purposes.
As shown in Figure 1 or 2, the dynamometry bolt of one embodiment of the invention, including bolt body 100, the and of sensing element 200
Protection device 300；Bolt body 100 axially offers mounting hole 110, and sensing element 200 is arranged in mounting hole 110, sensitive
The lead-out wire of element 200 is used to be electrically connected with the wire of external test circuitry；Protection device 300 is arranged on opening for mounting hole 110
Mouth end, the junction for protecting lead-out wire and the wire of external test circuitry.
Wherein, the species of sensing element 200 can be for various, such as：Piezoelectric membrane, grating sensor or foil gauge etc.
Deng preferably resistance strain gage, the lead-out wire of resistance strain gage is electrically connected with the wire of external test circuitry such that it is able to logical
The change of monitoring strain sheet resistance is crossed, bolt strained change is obtained.
The shape of sensing element 200 can also have various, it is preferable that sensing element 200 is in strip, and sensing element
200 length direction is square with the extension of bolt body 100 consistent.Wherein, sensing element 200 is preferably rectangle, may be used also
Think cylindrical shape, center line and the axis of bolt body 100 of sensing element 200 are located on the same line, in other words,
The center line for exactly fixedly mounting the mounting hole 110 of sensing element 200 is located along the same line with the axis of bolt body 100,
And sensing element 200 is fixedly mounted along the center line of mounting hole 110.
The cross sectional shape of mounting hole 110 can be for various, such as：Circular, oval, square or polygon etc., this
Art personnel can as needed select the cross sectional shape of mounting hole 110, preferably circular.The knot of mounting hole 110
Configuration formula can also be for various, such as unthreaded hole or stepped hole, it is preferable that mounting hole 110 is unthreaded hole, and its diameter is less than 2mm；
Or, mounting hole 110 is stepped hole, and it is M6 screwed holes and lower end for diameter 2mm unthreaded holes are combined to use upper end.
In addition, the mode that sensing element 200 is arranged on mounting hole 110 can be various, it is preferable that use adhesive, lead to
Installation and fixation that the techniques such as encapsulating, solidification complete sensing element 200 are crossed, sensing element 200 is fixedly mounted on apart from mounting hole
At 110 bottom surface 2mm-3mm so that sensing element 200 can be generally within the shaft core position of bolt body 100 at, beneficial to survey
Measure the accurate of data.
Sensing element 200 has the lead-out wire that is connected with external test circuitry, wherein, lead-out wire and external test circuitry
The connected mode of wire can be for various, such as：Bond, weld etc., preferably weld.The structure shape of protection device 300
Formula can be for various, such as：Protection device 300 can be gum cover pipe, and lead-out wire and external testing electricity are located at using gum cover pipe sleeve
The junction of the wire on road, and gluing fixation is carried out with gum cover pipe, so as to be played a protective role to above-mentioned junction, it is to avoid sensitive
The lead-out wire of element 200 is broken because being pullled by external force.Certainly, protection device 300 can also be other structures.
Dynamometry bolt in the present embodiment, mounting hole 110 is axially opened up in bolt body 100, and mounting hole 110 center
Line is located along the same line with the axis of bolt body 100, and sensing element 200 is fixedly mounted in mounting hole 110, this
Sample, sensing element 200 is located at the axle center of bolt, it is possible to reduce the external environmental factor such as temperature, greasy dirt and moment of flexure and moment of torsion
For the influence for measuring, and then the height-precision measurement to bolt axial pre tightening force can be realized.In addition, passing through protection device
The lead-out wire of 300 protection sensing elements 200, can avoid lead-out wire under tension and be broken, and improve the robustness of test block.
Referring to Fig. 1, as one kind preferred embodiment, protection device 300 includes flexible fastening seat 310, flexible fastening
Hollow part 311 is provided with seat 310, hollow part 311 is used to house the connection of lead-out wire and the wire of external test circuitry
Place, and the junction of lead-out wire and the wire of external test circuitry is fixed on by hollow part 311 by adhesive.
Wherein, the material of flexible fastening seat 310 can have resilient material for rubber or silica gel etc., it is preferred that
Flexible fastening seat 310 is rubber fixed seat.
Flexible fastening seat 310 can be with the connected mode of bolt body 100 it is various, for example：Clamping, bonding or screw thread
Connection etc..Preferably, flexible fastening seat 310 is bonded in the head of bolt body 100, i.e., rubber fixed seat is by adhesive
It is fixed on the head of bolt body 100.Flexible fastening seat 310 so can be as far as possible reduced to be come off from bolt body 100
Probability, improve protection device 300 stability.
In the present embodiment, lead-out wire is protected using flexible fastening seat 310, so as to pass through bullet when bolt is involved by external force
Property fixed seat 310 deformation buffer active force of the external force to lead-out wire, so as to lead-out wire play a part of protection.
Referring to Fig. 2, used as another preferred embodiment, protection device 300 includes connection-peg 320；Connection-peg 320 sets
Put in the openend of mounting hole 110, connection-peg 320 is used to be electrically connected with the lead-out wire of sensing element 200.So, the present embodiment
In dynamometry bolt need not be electrically connected with external test circuitry always, can only need measurement when connect external circuit, i.e.,
In the plug of external test circuitry inserted into connection-peg 320, being electrically connected for external test circuitry and sensing element 200 is realized
Connect, using more convenient.And the connected mode of connection-peg 320 and the openend of mounting hole 110 can be it is various, for example：Screw thread connects
Connect, gluing or clamping etc..
Further, adhesive is filled between the openend of connection-peg 320 and mounting hole 110.In connection-peg 320 and peace
Filling adhesive can as far as possible reduce the possibility that connection-peg 320 loosens between filling the openend in hole 110, improve protection dress
Put 300 stability.
The embodiment of the present invention illustrates that the lead-out wire of foil gauge accesses favour so that sensing element 200 is as resistance strain plate as an example
Stone electric bridge, and then complete demarcation and test to Axial stress in bolt.
When in use, bolt twists solid on connector, and the lead-out wire of foil gauge accesses Wheatstone bridge, during working bolt,
Due to bolt strained deformation, cause the change of the internal strain sheet resistance of bolt body 100, and there is linear relationship between the two, lead to
Crossing Wheatstone bridge can accurately measure the delta data of resistance.The situation of change strained by monitoring bolt, can obtain
Bolt strained change is obtained, so as to be that the design selection related to Axial stress in bolt, assembly technology parameter determination etc. provide foundation.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Shield scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of dynamometry bolt, it is characterised in that including bolt body, sensing element and protection device；The bolt body axle
To mounting hole is offered, the sensing element is arranged in the mounting hole, and the lead-out wire of the sensing element is used for and outside
The wire electrical connection of test circuit；The protection device is arranged on the openend of the mounting hole, for protect lead-out wire with it is outer
The junction of the wire of portion's test circuit.
2. dynamometry bolt according to claim 1, it is characterised in that the protection device includes flexible fastening seat, described
Hollow part is provided with flexible fastening seat, the hollow part is used to house the wire of the lead-out wire and external test circuitry
Junction, and the junction of the lead-out wire and the wire of external test circuitry is fixed on by the hollow part by adhesive
Position.
3. dynamometry bolt according to claim 2, it is characterised in that the flexible fastening seat is rubber fixed seat.
4. dynamometry bolt according to claim 3, it is characterised in that the rubber fixed seat is fixed on institute by adhesive
State the head of bolt body.
5. dynamometry bolt according to claim 1, it is characterised in that the protection device includes connection-peg；The grafting
Head is arranged on the openend of the mounting hole, and the connection-peg is used to be electrically connected with the lead-out wire of the sensing element.
6. dynamometry bolt according to claim 5, it is characterised in that the connection-peg is threadedly attached in the installation
The openend in hole.
7. dynamometry bolt according to claim 6, it is characterised in that the openend of the connection-peg and the mounting hole it
Between be filled with adhesive.
8. dynamometry bolt according to claim 1, it is characterised in that the sensing element is in strip, and the sensitivity
The length direction of element is consistent with the bearing of trend of the bolt body.
9. dynamometry bolt according to claim 8, it is characterised in that the sensing element is rectangle, and the sensitivity
Element center line along its length is located on the same line with the axis of the bolt body.
10. dynamometry bolt according to claim 1, it is characterised in that the sensing element is fixed on institute by adhesive
State in mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611152695.0A CN106706189A (en) | 2016-12-14 | 2016-12-14 | Force measuring bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611152695.0A CN106706189A (en) | 2016-12-14 | 2016-12-14 | Force measuring bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106706189A true CN106706189A (en) | 2017-05-24 |
Family
ID=58936954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611152695.0A Pending CN106706189A (en) | 2016-12-14 | 2016-12-14 | Force measuring bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106706189A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738106A (en) * | 2019-01-11 | 2019-05-10 | 重庆大学 | A kind of intelligent wireless bolt that can detect bolt pretightening and bent screws state |
| WO2019232675A1 (en) * | 2018-06-04 | 2019-12-12 | 舍弗勒技术股份两合公司 | Screw bolt assembly for measuring preload and bearing preload measurement apparatus |
| CN112240424A (en) * | 2019-07-16 | 2021-01-19 | 阀安格有限责任公司 | Accessory |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519652A (en) * | 2011-12-16 | 2012-06-27 | 天津大学 | Bolt pre-tightening force testing device and control method thereof |
| CN103884463A (en) * | 2014-04-19 | 2014-06-25 | 哈尔滨工业大学 | Composite material connection structure pre-tightening force online monitoring method |
| CN104791360A (en) * | 2015-04-21 | 2015-07-22 | 杨志强 | Intelligent bolt with pretightening force and temperature rising monitoring |
-
2016
- 2016-12-14 CN CN201611152695.0A patent/CN106706189A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519652A (en) * | 2011-12-16 | 2012-06-27 | 天津大学 | Bolt pre-tightening force testing device and control method thereof |
| CN103884463A (en) * | 2014-04-19 | 2014-06-25 | 哈尔滨工业大学 | Composite material connection structure pre-tightening force online monitoring method |
| CN104791360A (en) * | 2015-04-21 | 2015-07-22 | 杨志强 | Intelligent bolt with pretightening force and temperature rising monitoring |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019232675A1 (en) * | 2018-06-04 | 2019-12-12 | 舍弗勒技术股份两合公司 | Screw bolt assembly for measuring preload and bearing preload measurement apparatus |
| CN109738106A (en) * | 2019-01-11 | 2019-05-10 | 重庆大学 | A kind of intelligent wireless bolt that can detect bolt pretightening and bent screws state |
| CN112240424A (en) * | 2019-07-16 | 2021-01-19 | 阀安格有限责任公司 | Accessory |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202870024U (en) | Intelligent piezoelectric aggregate sensor for concrete structure | |
| CN205561747U (en) | Reinforced concrete and metal components warp measuring resistance strain displacement sensor | |
| CN107421677B (en) | Device and method for monitoring axial force of shield tunnel joint bolt | |
| CN103592062B (en) | A kind of axial pretightening force snesor | |
| CN106706189A (en) | Force measuring bolt | |
| WO2021129372A1 (en) | Triboelectric nanogenerator-based self-driven displacement sensor | |
| CN103551922A (en) | Strain gauge integrated three-dimensional turning force sensor | |
| JP2018503828A (en) | Sensor device for indirectly detecting torque of shaft rotatably supported | |
| US20120132008A1 (en) | Fiber optic load measurement device | |
| CN104655335B (en) | Ball pin sensor for automobile control arm and machining method for ball pin sensor | |
| JP2017536546A (en) | Mechanical member with force sensor | |
| CN205384108U (en) | Measure axial tension's resistance strain force sensor | |
| US9562802B2 (en) | Flex circuit interface for strain gauges | |
| CN107340041A (en) | Resistance-strain type vehicle weighing sensor | |
| KR20110105301A (en) | Temperature compensated load cell comprising strain gauges | |
| CN108253923B (en) | Preassembling calibration device | |
| CN205607584U (en) | Fiber grating air pressure sensor | |
| CN103884399B (en) | Fluid level transmitter | |
| CN106401628A (en) | Tightness degree test anchor rod and tightness degree test system | |
| CN206399570U (en) | Dynamometry bolt | |
| CN109855789A (en) | It is a kind of for monitoring the sensor of underwater small aircraft surface pressing | |
| CN105157591B (en) | A kind of Fiber Bragg Grating FBG array strain transducer of high sensitivity High Resolution | |
| CN203929033U (en) | Spot welded type fiber Bragg grating strain sensor | |
| CN207814149U (en) | A kind of dynamometry bolt and the rotor magnetic pole connection structure using the bolt | |
| CN110332913B (en) | Vibrating wire type integrated strain gauge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190604 Address after: 100037 No. 2 Yuetan North Street, Xicheng District, Beijing Applicant after: CHINA AEROSPACE STANDARDIZATION INSTITUTE Address before: 100071 No. 89 Xiaotun Road, Fengtai District, Beijing Applicant before: BEIJING HANGBIAO HUAKE ELECTROMECHANICAL HIGH-TECH CO.,LTD. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170524 |