CN107191514A - A kind of static hydraulic brake system - Google Patents
A kind of static hydraulic brake system Download PDFInfo
- Publication number
- CN107191514A CN107191514A CN201710528786.8A CN201710528786A CN107191514A CN 107191514 A CN107191514 A CN 107191514A CN 201710528786 A CN201710528786 A CN 201710528786A CN 107191514 A CN107191514 A CN 107191514A
- Authority
- CN
- China
- Prior art keywords
- brake system
- piston
- hydraulic brake
- body shell
- output shaft
- 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
- 230000003068 static effect Effects 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 39
- 239000010959 steel Substances 0.000 claims abstract description 39
- 238000009434 installation Methods 0.000 claims abstract description 10
- 239000012530 fluid Substances 0.000 claims abstract description 6
- 230000007704 transition Effects 0.000 claims description 13
- 239000010687 lubricating oil Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 7
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000010720 hydraulic oil Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000002457 bidirectional effect Effects 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- BYACHAOCSIPLCM-UHFFFAOYSA-N 2-[2-[bis(2-hydroxyethyl)amino]ethyl-(2-hydroxyethyl)amino]ethanol Chemical group OCCN(CCO)CCN(CCO)CCO BYACHAOCSIPLCM-UHFFFAOYSA-N 0.000 description 1
- 101100532451 Rattus norvegicus Slc22a17 gene Proteins 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/24—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/02—Fluid-pressure mechanisms
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The present invention relates to a kind of static hydraulic brake system, belong to hydraulic transmission technology field.The static hydraulic brake system of the present invention mainly includes output shaft, body shell, seam lid, bearing, piston, spring and friction pair etc., two installation dimensions different full dress roller bearing is installed on the output shaft, one is arranged in body shell, another covers installed in seam and is locally included in piston hole, friction pair steel disc is matched by three protrusion semicircles with the recessed semicircle of body shell, the brake release hydraulic fluid port of the cylindrical setting splayed configuration tangent plane of brake gear.The overall structure of the present invention is simple, and axial dimension is short, can bear big radial load and bidirectional axial force, and manufacture work, assembling and maintenance process are good.
Description
Technical field
The present invention relates to a kind of static hydraulic brake system, especially a kind of normally closed type has the static hydraulic pressure of cramped construction
Brake apparatus, belongs to hydraulic transmission technology field.
Background technology
Hydraulic brake system application is quite varied, general to use normally closed type static brake mode, with cycloid hydraulic pressure horse
Up to the hydraulic brake system for driving supporting application, it is longer to be independently operated, its general axial dimension of its structure, using ball bearing branch
Brake axle is supportted, the general axial dimension of its structure is larger and braking torque is less than 650Nm, but its radial direction relatively becomes with axial dimension
It is bigger, do not matched that with the hydraulic system of direct drive, be unfavorable for compact conformation and the high market demand of overall price/performance ratio, such as risen
The integrated demand of the electrically driven (operated) hydraulic system of platform drops, and especially it, which is additionally required, bears big radial load.
The content of the invention
Present invention aims at：In view of the above-mentioned problems of the prior art, proposing that a kind of new structure is extremely compact, especially
It is that axial distance is short, and maximum braking torque is up to 900Nm, and a kind of hydraulic braking with larger radial load ability to bear
Device, it is particularly possible on wheel hub, its simple in construction, radial dimension is smaller, anufacturability is good, assemble and maintenance process
Property is good.
In order to achieve the above object, applicant is analyzed by the prior art to hydraulic brake system and structure, is carried
Go out the structure of the shaft extension radial load ability to bear of hydraulic brake system, keep hydraulic brake system axial dimension it is short and radially
On the premise of size is also small and simple in construction, technical scheme of the invention below is proposed：A kind of static hydraulic brake system
It is fixedly connected by body shell with seam lid in the hydraulic oil liquid reservoir body constituted, the reservoir body and is formed with lubricating oil drain tap, it is described
Lubricating oil drain tap is arranged on seam and covered, and the skeleton axle envelope set in the body shell carries out rotatory sealing to the output shaft diameter of axle,
Described body shell one end, which is equipped with the output shaft that outer end is extended out, the reservoir body, is equipped with friction pair, piston and spring, described defeated
Shaft front and back end is mounted with two bearings, and described two bearings are all full dress roller bearing, and the completely dress roller bearing is by roller
Formed with two kinds of component assemblies of supporter, the supporter is the torus of indent, the roller is arranged on the indent of supporter
Place, it is theed improvement is that：The installation dimension of described two completely dress roller bearings is different, and the spring is arranged on seam and covered simultaneously
Annular steel shoe is provided with against piston, between the spring and piston, the spring diameter is suitable with steel shoe annular size.
The rear bearing is locally included in piston hole, and the piston is the big piston cylinder and valve piston cylinder structure of L-type
Into the transition of big the piston cylinder and valve piston cylinder is evagination concave inward structure, and the cavity of the body shell has and piston phase
Recessed structure outside the convex of adaptation.
The friction pair is made up of friction plate and steel disc, semicircle that the steel disc is protruded by odd number and body shell it is recessed
Semicircle be engaged, and carry out it is spacing, the friction plate by set etc. point missing spline tooth involute internal spline gear with it is defeated
The involute outer spline tooth of shaft is engaged.
Further improvement of the invention is that the protrusion semicircle and steel disc of the steel disc are cylindrical by vertical angle transition, using interior
Embedding recessed round-corner transition substitutes vertical angle transition.
Further improvement of the invention is the cylindrical setting splayed configuration tangent plane of the brake gear, two described tangent planes
On be respectively provided with brake release hydraulic fluid port.
Compared with the hydraulic brake system of prior art, technical scheme structure is extremely compact, and axial dimension is short,
The shaft extension of output shaft can bear bigger radial load, cause output because full dress roller bearing can bear certain axial force
Axle can bear bidirectional axial force, and overall structure is simple, anufacturability is good, it is good with maintenance process to assemble.
Brief description of the drawings
The present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of one embodiment of the invention.
Slotted nut 1 in figure, output shaft 2, key 3, axle envelope 4, body shell 5, fore bearing 6, compensating plate 7, steel disc 8, friction plate 9, O
Type circle 10, small back-up ring 11, piston 12, big back-up ring 13, O-ring 14, O-ring 15, steel shoe 16, bolt 17, spring 18, seam lid
19, pad 20, plug 21, rear bearing 22.
Fig. 2 is the right view of brake in Fig. 1 embodiments.
Fig. 3 is a kind of structural representation of the steel disc of sequence 8 of brake in Fig. 1 embodiments.
Fig. 4 is a kind of structural representation of the friction plate of sequence 9 of brake in Fig. 1 embodiments.
Embodiment one
A kind of basic structure of the static hydraulic brake system of the present embodiment as shown in figure 1, mainly include output shaft 2, body shell 5,
Seam lid 19, fore bearing 6, piston 12, spring 18 and friction pair etc., the friction pair are made up of steel disc 8 and friction plate 9, described
Output shaft is contacted with body shell by the secondary motion that rubs and is integrated.
A kind of static hydraulic brake system as shown in Figure 1 is fixedly connected on by body shell 5 and seam lid 19 by bolt 17
Together, the lubricating oil reservoir body of static hydraulic brake system is constituted, the seam lid 19 is formed with axial lubricating oil drain tap,
Lubricating oil drain tap is communicated with friction pair inner chamber, and drain tap is sealed by steel plug, and drain tap is used in static hydraulic brake system
The passway that lubricating oil can be made to change after appropriate time is used.Described output shaft 2 is using the skeleton knot being arranged in body shell 5
The axle envelope 4 of structure carries out rotatory sealing, and one end of the body shell 5 is equipped with the output shaft 2 that outer end is extended out, the portion of output shaft extension
Custom is divided to be referred to as shaft extension, the other end is provided with seam lid 19, and centre is provided with fore bearing 6, piston 12 and friction pair etc., lubricating oil
Equipped with friction pair, piston 12, spring 18 and rear bearing 22 etc. in reservoir body, the installation of static hydraulic brake system can typically be determined
Position seam is arranged on seam lid 19.
The front and back end of output shaft 2 is mounted with two bearings, and described two bearings are all full dress roller bearing, the full dress
Roller bearing is formed by the two kinds of component assemblies of roller and supporter, and the supporter is the torus of indent, and the roller is installed
In the interior recess of supporter, described supporter is the entirety of machining.Described two installations for completely filling roller bearing
Size is different, and the installation dimension of the fore bearing 6 is more than rear bearing 22, and the installation dimension of fore bearing 6 is big, close to shaft extension, determines axle
The radial load ability to bear main support stretched, rear bearing 22 is arranged in the endoporus of seam lid 19, is born radially as output shaft 2
The Auxiliary support of power.
The spring 18 is arranged in seam lid 19 and against piston 12, and ring is provided between the spring 18 and piston 12
The steel shoe 16 of shape, the diameter footpath of spring 18 is suitable with the annular size of steel shoe 16, i.e., steel shoe 16 is nested in spring 18
Install annular groove, or size identical with mounting hole annular groove.
Described spring 18, steel shoe 16 are completely set up in seam lid 19；Described spring 18, the setting of steel shoe 16
It is that steel shoe 16 is arranged in piston 12 that position, which carries out replacement, and spring 18 is partially disposed in piston 12 and seam lid 19.
The steel shoe 16 set between the big piston cylinder and seam lid 19 of the piston 12 so that the spring of all installations
On the piston 12 that 18 active force can be acted on uniformly, the steel shoe 16 is thin plate ring-shaped structure, and the spring 18 is set
Put in the cavity volume formed in the hole of seam lid 19 and body shell 5, and be resisted against on steel shoe 16 and seam lid 19.
The rear bearing 22 is local to be included in the inner bore of step of piston 12, the piston 12 for L-type big piston cylinder and
Valve piston cylinder is constituted, and the transition of big the piston cylinder and valve piston cylinder is evagination concave inward structure, large cylindrical be it is outer, it is small outside
Circle is interior, and the cavity of the body shell 5 has recessed structure outside the convex being adapted with piston 12.The structure can effectively reduce liquid
Press the axial distance of brake apparatus.
Piston 12 is engaged with the size piston hole of body shell 5 respectively by big piston cylinder and valve piston cylinder, big piston boit
Body is sealed by the assembly of big back-up ring 13 and O-ring 14, and valve piston cylinder is entered by the assembly of O-ring 10 and small back-up ring 11
Row sealing.The internal diameter of big back-up ring 13 is resisted against on O-ring 14, and the external diameter of big back-up ring 13 is resisted against on the big piston hole of body shell 5, O
Type circle 14 extrudes big back-up ring 13 and carries out high pressure sealing；Equally, the internal diameter of small back-up ring 11 is resisted against on O-ring 10, small back-up ring 11
External diameter be resisted against on the valve piston hole of body shell 5, O-ring 10 extrudes small back-up ring 11 and carries out high pressure sealing.The big work of piston 12
Profile one end cylinder of the close L-type of the installation seal combination body of stick harness body is smaller than other end cylinder, equally, the small work of piston 12
Profile one end cylinder of the close L-type of the installation seal combination body of stick harness body is smaller than other end cylinder, in order to which piston 12 is installed.
The sealing that described piston 12 is engaged with the size piston hole of body shell 5 respectively by big piston cylinder and valve piston cylinder can be adopted
Substituted with the additional Teflon back-up ring of O-ring.
Formed between the big piston cylinder and the transition portion of valve piston cylinder L-type and the cooperation cylinder of body shell 5 of piston 12
Seal cavity, is connected with brake release hydraulic fluid port.
The friction pair is made up of friction plate 9 and steel disc 8, increases compensating plate 7 before the steel disc 8, to adapt to different systems
Dynamic torque demand, the semicircle that the steel disc 8 is protruded by odd number is engaged with the recessed semicircle of body shell 5, and carry out it is spacing,
As shown in figure 3, the steel disc 8 is engaged by the semicircle of three protrusions with the recessed semicircle of body shell 5；The friction plate 9 leads to
The involute internal spline gear for crossing setting etc. point missing spline tooth is engaged with the involute outer spline tooth of output shaft, is such as conducive to tiring out
Product error elimination, as shown in figure 4, the friction plate 9 by set trisection lack spline tooth involute internal spline gear with
The involute outer spline tooth of output shaft is engaged.
As shown in figure 3, the protrusion semicircle of the steel disc 8 and steel disc 8 are cylindrical by vertical angle transition, the steel disc 8 it is convex
Go out semicircle cylindrical using embedded recessed round-corner transition replacement vertical angle transition with steel disc 8.
As shown in Fig. 2 the cylindrical setting splayed configuration tangent plane of the brake gear, a braking is respectively provided with tangent plane at two
Device discharges hydraulic fluid port, and two brakes release hydraulic fluid port when being provided with beneficial to hydraulic system fault using manual pump opens brake,
It is easy to leave fault in-situ.Shown in other Fig. 2, the brake gear is connected using four uniform bolts, the system
Dynamic device device using eight not uniform bolts of part can substitute and is connected.
In addition to the implementation, the present invention can also have other embodiment, such as steel disc 7 and the protrusion semicircle phase of body shell 5
Company replaces with friction plate 8 and is connected with the protrusion rectangle of body shell 5, and equally, friction plate 8 is connected with the spline of output shaft 2 replaces with steel
Piece 7 is connected with the rectangular spline of output shaft 2, the technical scheme of all use equivalent substitutions or equivalent transformation formation, all falls within this hair
The protection domain of bright requirement.
Claims (10)
1. a kind of static hydraulic brake system, main to include being fixedly connected with the hydraulic oil liquid cavity volume constituted with seam lid by body shell
Lubricating oil drain tap is formed with body, the reservoir body, the lubricating oil drain tap is arranged on seam and covered, is set in the body shell
Skeleton axle envelope rotatory sealing is carried out to the output shaft diameter of axle, described body shell one end is equipped with the output shaft that extends out of outer end, described
Friction pair, piston and spring are housed, the output shaft front and back end is mounted with two bearings, and described two bearings are all in reservoir body
Roller bearing is completely filled, the completely dress roller bearing is formed by the two kinds of component assemblies of roller and supporter, and the supporter is indent
Torus, the roller be arranged on supporter interior recess, it is characterised in that：Described two installation chis for completely filling roller bearing
Very little difference, the spring is arranged on seam and covered and against piston, and annular steel shoe, institute are provided between the spring and piston
State spring diameter suitable with steel shoe annular size.
2. a kind of static hydraulic brake system according to claim 1, it is characterised in that：The described rear bearing is local
It is included in piston hole, the piston is constituted for the big piston cylinder and valve piston cylinder of L-type, the big piston cylinder and small work
The transition of stick harness body is evagination concave inward structure, and the cavity of the body shell has recessed structure outside the convex being adapted with piston.
3. a kind of static hydraulic brake system according to claim 2, it is characterised in that：The friction pair by friction plate and
Steel disc is constituted, and the semicircle that the steel disc is protruded by odd number is engaged with the recessed semicircle of body shell, and the friction plate passes through
The involute internal spline gear of setting etc. point missing spline tooth is engaged with the involute outer spline tooth of output shaft.
4. a kind of static hydraulic brake system according to claim 3, it is characterised in that：The protrusion semicircle of the steel disc with
Steel disc is cylindrical to pass through vertical angle transition.
5. a kind of static hydraulic brake system according to claim 4, it is characterised in that：The steel disc is using embedded recessed
Round-corner transition substitutes vertical angle transition.
6. a kind of static hydraulic brake system according to claim 5, it is characterised in that：The steel disc passes through three protrusions
Semicircle be engaged with the recessed semicircle of body shell.
7. a kind of static hydraulic brake system according to claim 6, it is characterised in that：The friction plate passes through setting etc.
The involute internal spline gear of missing spline tooth is divided to be engaged with the involute outer spline tooth of output shaft.
8. a kind of static hydraulic brake system according to claim 7, it is characterised in that：The friction plate is by setting three
The involute internal spline gear of decile missing spline tooth is engaged with the involute outer spline tooth of output shaft.
9. a kind of static hydraulic brake system according to claim 8, it is characterised in that：The brake gear it is cylindrical
Set and a brake release hydraulic fluid port is respectively provided with splayed configuration tangent plane, two described tangent planes.
10. a kind of static hydraulic brake system according to claim 9, it is characterised in that：The brake gear can be adopted
With eight not uniform bolts of part substitute and be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710528786.8A CN107191514A (en) | 2017-07-01 | 2017-07-01 | A kind of static hydraulic brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710528786.8A CN107191514A (en) | 2017-07-01 | 2017-07-01 | A kind of static hydraulic brake system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107191514A true CN107191514A (en) | 2017-09-22 |
Family
ID=59881183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710528786.8A Pending CN107191514A (en) | 2017-07-01 | 2017-07-01 | A kind of static hydraulic brake system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107191514A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107989929A (en) * | 2017-12-12 | 2018-05-04 | 镇江大力液压马达股份有限公司 | A kind of hydraulic brake system |
| CN108458005A (en) * | 2018-03-31 | 2018-08-28 | 镇江大力液压马达股份有限公司 | A kind of hydraulic brake system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB750722A (en) * | 1954-03-19 | 1956-06-20 | Westinghouse Brake & Signal | Improvements relating to driver's brake control devices for electro-pneumatically controlled fluid pressure braking apparatus |
| CN1300344A (en) * | 1999-05-07 | 2001-06-20 | 日立建机株式会社 | Hydraulic motor with brake device |
| CN101865219A (en) * | 2010-06-11 | 2010-10-20 | 德阳市利通印刷机械有限公司 | Cylinder structure of hydraulic clutch brake |
| CN203585160U (en) * | 2013-12-13 | 2014-05-07 | 济宁科尔森液压有限公司 | Complete disc type wet hydraulic brake |
| CN105402285A (en) * | 2015-11-22 | 2016-03-16 | 镇江大力液压马达股份有限公司 | Hydraulic brake device |
-
2017
- 2017-07-01 CN CN201710528786.8A patent/CN107191514A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB750722A (en) * | 1954-03-19 | 1956-06-20 | Westinghouse Brake & Signal | Improvements relating to driver's brake control devices for electro-pneumatically controlled fluid pressure braking apparatus |
| CN1300344A (en) * | 1999-05-07 | 2001-06-20 | 日立建机株式会社 | Hydraulic motor with brake device |
| CN101865219A (en) * | 2010-06-11 | 2010-10-20 | 德阳市利通印刷机械有限公司 | Cylinder structure of hydraulic clutch brake |
| CN203585160U (en) * | 2013-12-13 | 2014-05-07 | 济宁科尔森液压有限公司 | Complete disc type wet hydraulic brake |
| CN105402285A (en) * | 2015-11-22 | 2016-03-16 | 镇江大力液压马达股份有限公司 | Hydraulic brake device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107989929A (en) * | 2017-12-12 | 2018-05-04 | 镇江大力液压马达股份有限公司 | A kind of hydraulic brake system |
| CN108458005A (en) * | 2018-03-31 | 2018-08-28 | 镇江大力液压马达股份有限公司 | A kind of hydraulic brake system |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20170922 |