CN206522373U - A kind of lockpin-type synchronizer having three pyramidal faces - Google Patents
A kind of lockpin-type synchronizer having three pyramidal faces Download PDFInfo
- Publication number
- CN206522373U CN206522373U CN201621379365.0U CN201621379365U CN206522373U CN 206522373 U CN206522373 U CN 206522373U CN 201621379365 U CN201621379365 U CN 201621379365U CN 206522373 U CN206522373 U CN 206522373U
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- friction
- gear
- ring
- synchronizer
- lock pin
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- 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.)
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Abstract
The utility model discloses a kind of lockpin-type synchronizer having three pyramidal faces, including：High gear conical ring assembly, synchronizer sliding sleeve gear and the low gear conical ring assembly set gradually；The high gear lock pin of described high gear conical ring assembly and the high gear locking hole of synchronizer sliding sleeve gear are connected；Three groups of conical surface friction pairs, are rub inner ring assembly and the first friction pair of friction middle ring formation, the second friction pair of friction middle ring and friction outer shroud formation, friction outer shroud and the 3rd friction pair of low gear gear formation respectively；Described friction inner ring assembly includes friction inner ring and low gear lock pin, and the low gear lock pin of friction inner ring assembly is connected with the low gear locking hole on synchronizer sliding sleeve gear；Described friction outer shroud and friction inner ring is relatively set with jump-ring slot, and the jump ring being arranged in jump-ring slot carries out spacing to the relative position of friction inner ring and the outer shroud that rubs.The utility model is poor with one heart by new mechanical structure solution three conical surfaces of synchronizer having three pyramidal faces, the unreliable problem of locking of putting into gear.
Description
【Technical field】
The utility model belongs to synchronizer design field, more particularly to a kind of lockpin-type synchronizer having three pyramidal faces.
【Background technology】
Pin-type synchronizer is simple in construction because of its, and lock pin intensity is high, and shock resistance is good, is widely used as Pneumatic shift
Auxiliary box synchronizer.The gear box sub-case synchronizer high to low gear of domestic mainstream car design matching is using single cone design, with user
Raising to shifting comfort requirement, odd-side low gear synchronizer performance and has allowed user to feel discontented with the significant difference of high gear.
In principle, pin-type synchronizer can coordinate conical surface number by increasing, and significantly improve synchronizer performance.Both at home and abroad
Also there is the mentality of designing of some lockpin-type synchronizer having three pyramidal faces, its common ground：Mechanical structure ensures that outer shroud is connected with inner ring, circumferential
It is axially free without relative motion；Middle ring is connected with gear, circumferential without relative motion, axially free；In the presence of gear shifting force,
Three drag rings are concured.Current synchronizer having three pyramidal faces there are no engineer applied.
Single conical surface synchronizer structure is simple, good reliability；Synchronizer having three pyramidal faces can solve limited design space synchronizer
The problem of capacity is inadequate, but three conical surfaces because with one heart it is poor caused by synchronizer poor reliability, especially in some floating structures
On gearbox.
【Utility model content】
To solve the problem of prior art is present, the utility model provides a kind of lockpin-type synchronizer having three pyramidal faces, passed through
New mechanical structure solution three conical surfaces of synchronizer having three pyramidal faces are poor with one heart, the unreliable problem of locking of putting into gear.
The utility model purpose is achieved through the following technical solutions：
A kind of lockpin-type synchronizer having three pyramidal faces, including：The high gear conical ring assembly that sets gradually, synchronizer sliding sleeve gear and low
Keep off conical ring assembly；The high gear lock pin of described high gear conical ring assembly and the high gear locking hole of synchronizer sliding sleeve gear are connected；Institute
The low gear conical ring assembly stated is lockpin-type having three pyramidal faces structure, including three groups of conical surface friction pairs are friction inner ring assembly respectively with rubbing
Wipe the second friction pair, friction outer shroud and the low gear gear of the first friction pair, friction middle ring and the friction outer shroud formation of middle ring formation
The 3rd friction pair formed；Described friction inner ring assembly includes friction inner ring and low gear lock pin, the low of inner ring assembly of rubbing
Gear lock pin is connected with the low gear locking hole on synchronizer sliding sleeve gear；Described friction outer shroud and friction inner ring is oppositely arranged
There is jump-ring slot, the jump ring being arranged in jump-ring slot carries out spacing to the relative position of friction inner ring and the outer shroud that rubs.
The outer ring radial equipartition of described friction inner ring has some projections, and friction outer shroud is provided with and the raised phase of friction inner ring
Some grooves matched somebody with somebody；The uniform some claws in the middle ring that rubs axial direction, during assembling, friction middle ring is set on the male cone (strobilus masculinus) of friction inner ring,
Low gear lock pin and the claw for the middle ring that rubs are in opposite direction；Friction outer shroud is set on the male cone (strobilus masculinus) of friction middle ring, and rub inner ring
Projection be arranged on friction outer shroud groove in, jump ring block friction inner ring projection, friction outer shroud and friction inner ring synchronous axial system.
Described high gear conical ring assembly includes high gear drag ring, and the side of high gear drag ring is provided with high gear lock pin and bullet
Spring hole, the axis of spring eye is vertical with lock pin axis, and one end of spring eye is provided with the lock pin vertical with spring axially bored line
Hole；Described low gear lock pin includes multiple uniform the first lock pins and the second lock pin, the first lock pin and the second locking
Pin both passes through the low gear locking hole on synchronizer sliding sleeve gear, and the first lock pin inserts the locking pin-and-hole of high gear drag ring
It is interior, and by spring compression；High gear lock pin passes through the high gear locking hole of synchronizer sliding sleeve gear；Low gear lock pin and high gear locking
Pin is equipped with locking face, is matched respectively with the low gear locking hole of synchronizer sliding sleeve gear and the locking face of high gear locking hole.
The length of the first described lock pin is more than the length of the second lock pin.
In use, synchronizer sliding sleeve gear is located on output shaft, and it is arranged between high gear gear and low gear gear, high gear
Conical ring assembly is contacted with the cone of friction matching of high gear gear；The claw of friction middle ring stretches into groove axially uniform on low gear gear
Interior, synchronizer sliding sleeve gear is provided with the internal tooth matched with the engaging tooth of low gear gear, and friction middle ring is rotated with low gear gear synchronous.
It is provided between three groups of described conical surface friction pairs for increasing the friction material of frictional force.
Friction pair between described friction inner ring assembly and friction middle ring, its friction material is arranged on friction inner ring assembly
Drag ring on；Friction pair between the middle ring that rubs and friction outer shroud, its friction material is arranged in friction middle ring；Rub outer shroud
With the friction pair between low gear gear, its friction material is arranged on friction outer shroud.
Described friction outer shroud, friction inner ring and friction middle ring is arranged concentrically and mutually leaves gap.
Relative to prior art, the utility model has advantages below：
Lockpin-type synchronizer having three pyramidal faces of the present utility model are in shift process is performed, and synchronizer sliding sleeve gear is in gear shifting force
Under effect so that annular conical surface and friction middle ring taper-face contact in friction, annular conical surface is in contact with friction outer ring conical surface in friction, rubs
Wipe outer ring conical surface to be in contact with the low gear gear conical surface, clip spring structure ensures that three cones of friction have enough gaps and whole gearshift
During have enough concentricitys, so as to reliably realize the effect of the synchronous capacity of having three pyramidal faces greatly, reduce gear shifting force or contracting
Short shift time.And then solution three conical surfaces of synchronizer having three pyramidal faces are poor with one heart, the unreliable problem of locking of putting into gear.
Further, synchronizer lock pin is provided with two kinds of different structures, and then is effectively guaranteed in shift process
There is provided synchronizer unfailing performance for three conical surface concentricitys.
【Brief description of the drawings】
Fig. 1 is the utility model lockpin-type synchronizer having three pyramidal faces structure chart；
Fig. 2 is low gear conical ring assembly structure chart；
Fig. 3 is friction inner ring assembly outline drawing；
Fig. 4 is friction middle ring outline drawing；
Fig. 5 is friction outer shroud outline drawing；
Fig. 6 is jump ring outline drawing；
Fig. 7 is high gear drag ring schematic diagram；
Fig. 8 is synchronizer sliding sleeve gear schematic diagram；
Wherein：1- high gear gears；2- high gear conical ring assemblies；3- synchronizer sliding sleeve gears；4- low gear conical ring assemblies；5- is exported
Axle；6- low gear gears；7- friction outer shrouds；8- friction middle rings；9- friction inner ring assemblies；10- jump rings；The lock pins of 11- first；12-
Second lock pin；13- friction inner ring；80th, claw；70th, groove；130th, it is raised；14 high gear drag rings；15th, high gear lock pin；16、
Spring；140th, locking pin-and-hole；141st, spring eye.
【Embodiment】
Below in conjunction with the accompanying drawings, embodiment of the present utility model is described in detail, but the utility model is not limited
In the embodiment.Thoroughly understand in order that the public has to the utility model, in following the utility model preferably applies example in detail
Illustrate concrete details.
As shown in figure 1, a kind of lockpin-type synchronizer having three pyramidal faces of the utility model, including high gear conical ring assembly 2, low gear conical ring
Assembly 4, synchronizer sliding sleeve gear 3, output shaft 5, gear；Synchronous conical ring assembly is by friction outer shroud 7, friction middle ring 8, friction inner ring
Assembly 9 and jump ring 10 are constituted；Friction inner ring assembly 9 is made up of friction inner ring 13 and synchronizer lock pin.
As shown in Figure 2-5, three groups of conical surface friction pairs can by the inner ring 13 that rubs, friction middle ring 8, friction outer shroud 7 it is outer
The conical surface and inner conical surface are provided with friction material and combine to be formed；Friction material can be any kind of friction material；Rub outer shroud 7
Have jump-ring slot, jump ring 10 is stuck in jump-ring slot, will friction inner ring assembly 9, friction middle ring 8, to constitute synchronous conical ring total for friction outer shroud 7
Into assembly, outer shroud 7 and the free degree limited on synchronous conical ring assembly axial direction of middle ring 8；The outer ring axial direction for the inner ring 13 that rubs
Being evenly equipped with has some grooves 70 matched with the projection 130 of friction inner ring 13 on some raised 130, friction outer shroud 7；Friction friction middle ring
Some grooves 70 are axially evenly equipped with the uniform some claws 80 in 88 axial directions, gear with friction middle ring claw 80 to match；Rub inner ring 13
On be fixed with 6 equally distributed lock pins 11 and 12 vertically, lock pin is through the locking hole on synchronizer sliding sleeve gear 3.
Friction pair between described friction inner ring assembly 9 and friction middle ring 8, it is total that its friction material is arranged on friction inner ring
Into on 9 drag ring；Friction pair between the middle ring 8 that rubs and friction outer shroud 7, its friction material is arranged in friction middle ring 8；Rub
The friction pair between outer shroud 7 and low gear gear 6 is wiped, its friction material is arranged on friction outer shroud 7.
First lock pin 11 and the second lock pin 12, which are provided with locking face, synchronizer sliding sleeve gear 3, to be offered and first
First, second locking hole that the lock pin 12 of lock pin 11 and second is engaged, the nose end of first, second locking hole is offered and locked
The locking face that the locking face of shotpin is engaged；During assembling, the first lock pin 11 and the second lock pin 12 pass through synchronizer slide teeth
Corresponding locking hole on set 3.
As shown in Fig. 2~8, synchronizer includes low gear conical ring assembly 4, high gear conical ring assembly 2, synchronizer sliding sleeve gear 3, lock
Shotpin；Low gear conical ring assembly 4 includes low gear friction inner ring 13, friction middle ring 8, friction outer shroud 7；Low gear friction inner ring 13 is provided with
Three groups of low gear lock pins, every group includes one longer low gear lock pin 11 and one shorter low gear lock pin 12, this three groups of lockings
Pin is distributed on low gear drag ring 13, and low gear friction inner ring 13 periphery is provided with friction material, and friction middle ring 8 is set in low gear and rubbed
Wipe the periphery of inner ring 13；Friction middle ring 8 is provided with 9 uniform pawls, 80,9 pawls 80 and is respectively protruding into uniform 9 in the side of low gear gear 6
In individual groove, friction middle ring 8 and the synchronous axial system of low gear gear 6, friction middle ring 8 periphery are provided with friction material；Low gear friction outer shroud
It is set in low gear friction middle ring 8 periphery, and provided with 9 grooves 70, is equipped with 9 projections 130 in low gear, stretches into low gear outer shroud
9 grooves 70 in, in the presence of 9 projections 130 of low gear inner ring, low gear outer shroud and low gear inner ring synchronous axial system, low gear outer shroud 7
Periphery be provided with friction material, matched with the cone of friction of low gear gear；The internal diameter of low gear outer shroud 7 is additionally provided with annular groove, leads to
Cross the snap ring 10 set spacing to low gear inner ring 13 and the progress of the relative position of low gear outer shroud 7；The inner circumferential of high gear conical ring assembly 2 is set
There is friction material, matched with the cone of friction of high gear gear 1；The also uniform 3 high gear lock pins 15 in the side of high gear drag ring 14
With three spring eyes 141, the axis of spring eye 141 is vertical with the axis of lock pin 15, and one end of spring eye 141 is provided with and spring
The vertical locking pin-and-hole 140 of axially bored line；The low gear lock pin of low gear friction inner ring passes through the low gear locking of synchronizer sliding sleeve gear 3
Pin-and-hole, and the longer lock pin 11 of low gear is inserted in high gear drag ring locking pin-and-hole 140, and compressed by compression spring 16；It is high
Keep off the high gear locking pin-and-hole that lock pin 15 passes through synchronizer sliding sleeve gear 3；Low gear lock pin and high gear lock pin 15 are equipped with lock
Only face, is matched with the low gear locking pin-and-hole of synchronizer sliding sleeve gear 3 and the locking face of high gear locking pin-and-hole respectively；Synchronizer is slided
Tooth set 3 is provided with internal tooth, is matched with the engaging tooth of low gear gear 6.
General principle of the present utility model is：If synchronizer is in high gear position, when driver hangs low gear, low gear shift fork ripple
Dynamic synchronizer sliding sleeve gear 3 moves right, and is separated with high gear gear 1, and now synchronizer sliding sleeve gear 3 reaches neutral gear position,
Under the action of the spring, high gear drag ring 14 relatively rotates with low gear friction inner ring 13 so that the lock of low gear lock pin 15
Only the locking face of the low gear locking pin-and-hole of face and synchronizer sliding sleeve gear 3 is in pre-locking state, when synchronizer sliding sleeve gear 3 after
Continuous movement, the locking of the low gear locking pin-and-hole of synchronizer sliding sleeve gear 3 applies pressure towards low gear lock pin, promotes low gear friction
Inner ring 13, low gear friction inner ring 13 compresses low gear friction middle ring 8, and low gear friction middle ring 8 compresses low gear friction outer shroud 9, and low gear is rubbed
The cone of friction for wiping outer shroud 9 compresses the cone of friction of low gear gear 6, because the rotating speed of low gear friction inner ring 13 and friction outer shroud 9
It is different from low gear friction middle ring 8 and the rotating speed of low gear gear 6, in the presence of frictional force, finally tend to be synchronous, when rotating speed reaches one
When cause, synchronizer sliding sleeve gear 3 pressure and low gear lock pin and synchronizer sliding sleeve gear low gear locking pin-and-hole lock
Only the synchronous inner ring relative synchronization device sliding gear collar 3 of the lower low gear of face effect inverts an angle, and now synchronizer sliding sleeve gear 3 continues
Move right, synchronizer sliding sleeve gear 3 is combined with the engaging tooth of low gear gear, is now linked into low gear.
Gear is plucked from high gear gear 1, the conjunction gear of synchronizer sliding sleeve gear 3 departs from the conjunction gear of high gear gear 1, high gear cone
Stage clip in ring assembly 2 acts on lock pin 11 so that in lock pin 11 and lock pin 12 and the locking hole of synchronizer sliding sleeve gear 3
Locking face keep contact condition, while jump ring 10 cause friction outer shroud 7, friction middle ring 8, friction inner ring 13 with one heart, and with it is low
Keep off the inner conical surface of gear 6 to be in close contact, three groups of cones of friction work simultaneously, lock pin 11 and the secure ratcs of lock pin 12, it is synchronous
After the completion of enter gear, the conjunction gear of the conjunction gear of synchronizer sliding sleeve gear 3 and low gear gear 6 completes to combine.
In high gear into low gear transfer process, snap ring 10 is to low gear friction inner ring 13 and the relative position of low gear friction outer shroud 9
Put progress spacing, make the ensuring coaxiality between them in certain limit, it is to avoid inner ring 13 and low gear are rubbed because low gear rubs
The low gear lock pin that the wiping over-tilting of outer shroud 9 is caused matches failure with the locking pin-and-hole of synchronizer sliding sleeve gear 3, it is ensured that synchronous
The net synchronization capability of device and the reliability put into gear.Low gear is linked into the process of high gear away from similar.
Lockpin-type synchronizer having three pyramidal faces are in shift process is performed, and synchronizer sliding sleeve gear 3 is under gear shifting force effect so that
Rub the conical surface of inner ring 13 and the friction taper-face contact of middle ring 8, and the friction conical surface of middle ring 8 is in contact with the friction conical surface of outer shroud 7, and rub outer shroud
7 conical surfaces are in contact with the conical surface of low gear gear 6, and the structure of jump ring 10 ensures that three cones of friction have enough gaps and entirely shifted gears
Concentricity enough Cheng Zhongyou, so as to reliably realize the effect of the synchronous capacity of having three pyramidal faces greatly, reduces gear shifting force or shortening
Shift time.
More than, preferred embodiment only of the present utility model is not limited only to practical range of the present utility model, Fan Yiben
Equivalence changes and modification that the content of utility model patent scope is done, all should be technology category of the present utility model.
Claims (8)
1. a kind of lockpin-type synchronizer having three pyramidal faces, it is characterised in that including：High gear conical ring assembly (2), the synchronizer set gradually
Sliding gear collar (3) and low gear conical ring assembly (4)；The high gear lock pin (15) of described high gear conical ring assembly (2) is slided with synchronizer
The high gear locking hole connection of dynamic tooth set (3)；Described low gear conical ring assembly (4) is lockpin-type having three pyramidal faces structure, including three groups of cones
Face friction pair, is rub inner ring assembly (9) and the first friction pair of friction middle ring (8) formation, friction middle ring (8) and friction respectively
The second friction pair, friction outer shroud (7) and the 3rd friction pair of low gear gear (6) formation of outer shroud (7) formation；In described friction
Ring assembly (9) includes friction inner ring (13) and low gear lock pin, and low gear lock pin and the synchronizer of friction inner ring assembly (9) are slided
Low gear locking hole connection on tooth set (3)；Described friction outer shroud (7) and friction inner ring (13) is relatively set with jump-ring slot,
The jump ring (10) being arranged in jump-ring slot carries out spacing to the relative position of friction inner ring (13) and friction outer shroud (7).
2. a kind of lockpin-type synchronizer having three pyramidal faces according to claim 1, it is characterised in that described friction inner ring (13)
Outer ring radial equipartition have some raised (130), friction outer shroud (7) is provided with and friction inner ring (13) raised (130) matches
Some grooves (70)；The uniform some claws (80) in the middle ring that rubs (8) axial direction, during assembling, friction middle ring (8) is set in friction inner ring
(13) on male cone (strobilus masculinus), low gear lock pin and the claw (80) of friction middle ring (8) are in opposite direction；Friction outer shroud (7), which is set in, to rub
On the male cone (strobilus masculinus) for wiping middle ring (8), the projection (130) of friction inner ring (13) is arranged in the groove (70) of friction outer shroud (7), jump ring
(10) projection (130) of friction inner ring (13), friction outer shroud (7) and friction inner ring (13) synchronous axial system are blocked.
3. a kind of lockpin-type synchronizer having three pyramidal faces according to claim 2, it is characterised in that described high gear conical ring assembly
(2) high gear drag ring (14) is included, the side of high gear drag ring (14) is provided with high gear lock pin (15) and spring eye (141),
The axis of spring eye (141) is vertical with lock pin (15) axis, and one end of spring eye (141) is provided with vertical with spring axially bored line
Locking pin-and-hole (140)；Described low gear lock pin includes multiple uniform the first lock pins (11) and the second lock pin (12),
First lock pin (11) and the second lock pin (12) both pass through the corresponding low gear locking hole on synchronizer sliding sleeve gear (3), and
And first lock pin (11) insertion high gear drag ring (14) locking pin-and-hole (140) in, and by spring (16) compress；High gear locking
Sell the high gear locking hole that (15) pass through synchronizer sliding sleeve gear (3)；Low gear lock pin and high gear lock pin (15) are equipped with locking
Face, is matched with the low gear locking hole of synchronizer sliding sleeve gear (3) and the locking face of high gear locking hole respectively.
4. a kind of lockpin-type synchronizer having three pyramidal faces according to claim 2, it is characterised in that in use, synchronizer is slided
Tooth set (3) is located on output shaft (5), and is arranged between high gear gear (1) and low gear gear (6), high gear conical ring assembly (2) with
The cone of friction matching contact of high gear gear (1)；The claw (80) of friction middle ring (8) stretches into axially uniform on low gear gear (6)
Groove in, synchronizer sliding sleeve gear (3) is provided with the internal tooth that match with the engaging tooth of low gear gear (6), the middle ring that rubs (8) and low gear
Gear (6) synchronous axial system.
5. a kind of lockpin-type synchronizer having three pyramidal faces according to claim 3, it is characterised in that the first described lock pin
(11) length is more than the length of the second lock pin (12).
6. a kind of lockpin-type synchronizer having three pyramidal faces according to claim 1, it is characterised in that three groups of described conical surface frictions
It is provided between pair for increasing the friction material of frictional force.
7. a kind of lockpin-type synchronizer having three pyramidal faces according to claim 6, it is characterised in that described friction inner ring assembly
(9) friction pair between friction middle ring (8), its friction material is arranged on the drag ring of friction inner ring assembly (9)；In friction
Friction pair between ring (8) and friction outer shroud (7), its friction material is arranged in friction middle ring (8)；Rub outer shroud (7) with it is low
The friction pair kept off between gear (6), its friction material is arranged on friction outer shroud (7).
8. a kind of lockpin-type synchronizer having three pyramidal faces according to claim 1, it is characterised in that described friction outer shroud (7),
Friction inner ring (13) is arranged concentrically with friction middle ring (8) and mutually leaves gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621379365.0U CN206522373U (en) | 2016-12-15 | 2016-12-15 | A kind of lockpin-type synchronizer having three pyramidal faces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621379365.0U CN206522373U (en) | 2016-12-15 | 2016-12-15 | A kind of lockpin-type synchronizer having three pyramidal faces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206522373U true CN206522373U (en) | 2017-09-26 |
Family
ID=59888555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621379365.0U Withdrawn - After Issue CN206522373U (en) | 2016-12-15 | 2016-12-15 | A kind of lockpin-type synchronizer having three pyramidal faces |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206522373U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106763277A (en) * | 2016-12-15 | 2017-05-31 | 陕西法士特汽车传动集团有限责任公司 | Lockpin-type synchronizer having three pyramidal faces |
| CN113944700A (en) * | 2021-10-27 | 2022-01-18 | 东风商用车有限公司 | Synchronizer and planet auxiliary box |
-
2016
- 2016-12-15 CN CN201621379365.0U patent/CN206522373U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106763277A (en) * | 2016-12-15 | 2017-05-31 | 陕西法士特汽车传动集团有限责任公司 | Lockpin-type synchronizer having three pyramidal faces |
| CN113944700A (en) * | 2021-10-27 | 2022-01-18 | 东风商用车有限公司 | Synchronizer and planet auxiliary box |
| CN113944700B (en) * | 2021-10-27 | 2023-05-30 | 东风商用车有限公司 | Synchronizer and planetary auxiliary box |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170926 Effective date of abandoning: 20190329 |