CN207374363U - A kind of retaining mechanism and the brake valve with the structure - Google Patents
A kind of retaining mechanism and the brake valve with the structure Download PDFInfo
- Publication number
- CN207374363U CN207374363U CN201721441328.2U CN201721441328U CN207374363U CN 207374363 U CN207374363 U CN 207374363U CN 201721441328 U CN201721441328 U CN 201721441328U CN 207374363 U CN207374363 U CN 207374363U
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- valve
- spool
- push rod
- retaining mechanism
- valve body
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- 230000007246 mechanism Effects 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 25
- 239000010959 steel Substances 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 230000003137 locomotive effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000003100 immobilizing effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The utility model provides a kind of retaining mechanism first, and including push rod, steel ball A, elastic element and adjustment part, the push rod is equipped with several limiting slots, and steel ball A is withstood by elastic element to be fallen into one of limiting slot, realizes locking function；Secondly a kind of brake valve with the retaining mechanism is provided, including valve body, valve deck, spool and retaining mechanism, inlet air plenum and room of leaking informaton are equipped in valve body, valve port is equipped between inlet air plenum and room of leaking informaton, it is to be detachably connected between valve deck and valve body, thrust spring is equipped between valve deck and the bottom of spool, valve port is withstood at the top of spool, brake valve is made to be in normally off, one end of push rod penetrates to contradict with the top of spool in valve body and connect, the quantity of push rod upper limit position groove is two, corresponding with the position of spool, respectively upper locking slot and lower locking slot.Brake valve in the utility model has the function of locking spool, and simple in structure, can realize and quickly and effectively leak informaton.
Description
Technical field
The utility model is related to the braking technology fields of rail vehicle, and in particular to a kind of retaining mechanism and with the structure
Brake valve.
Background technology
Emergency braking portion is generally all arranged to what is directly controlled by the atmospheric pressure of train brake pipe by modern locomotive vehicle
Emergency brake, emergency brake are a particularly important individual components in locomotive brake gear, it can receive it is various in the case of
Emergency braking train brake pipe decompression rate, the air of train brake pipe is made to arrange to air, realizes fast braking.Wherein, tightly
The spool of anxious brake valve is directly controlled by the atmospheric pressure in train brake pipe, is inflated by train brake pipe to inlet air plenum,
Spool both sides form pressure difference and carry out balance valve core, and in emergency braking, the pressure of train brake pipe drastically declines, both sides above and below spool
Larger pressure difference is generated, the elastic force of thrust spring can be overcome and moved down, open-top brake valve, moment drains train brake pipe
Pressure air generates emergency braking effect.
But above-mentioned emergency braking has a problem that, spool depends merely on atmospheric pressure control position, spool position when opening
Extremely unstable, exhaust efficiency is low, influences the braking effect of emergency brake.
In view of drawbacks described above, the utility model creator obtains this practicality newly finally by prolonged research and practice
Type.
Utility model content
To solve the above problems, the technical solution adopted in the utility model is, a kind of retaining mechanism is provided first, including
Push rod, steel ball A, elastic element and the adjustment part for adjusting the elastic element stroke, the push rod are equipped with several
Limiting slot, the steel ball A is withstood by elastic element to be fallen into one of limiting slot, realizes locking function.
Further, the elastic element is retaining spring.
Further, the adjustment part is adjusting bolt.
Further, the limiting slot is dovetail groove.
Further, the upper trapezoid of the dovetail groove while and the angle on during lower trapezoid and base be obtuse angle, the upper trapezoid
The angle on side and base is 90 ° of+α1, the angle on the lower trapezoid side and base is 90 ° of+α2。
Further, the α1Scope for 20 °~60 °, the α2Scope be 0 °~45 °.
Secondly a kind of brake valve with the retaining mechanism is provided, including valve body, valve deck, spool and the locking machine
Structure, the valve body is interior to be equipped with inlet air plenum and room of leaking informaton, and valve port, the valve deck and valve body are equipped between the inlet air plenum and room of leaking informaton
Between to be detachably connected, thrust spring is equipped between the valve deck and the bottom of spool, valve port is withstood at the top of the spool,
The brake valve is made to be in normally off, one end of the push rod penetrates to contradict with the top of spool in valve body and connect, described to push away
The quantity of bar upper limit position groove is two, corresponding with the position of the spool, respectively upper locking slot and lower locking slot.
Further, it is additionally provided with sealing device.
Further, dust cover is further included, top edge is connected on the push rod, and lower edge is connected on the valve body,
Foreign matter is brought into when entering valve body for anti-throw-out lever.
Further, it is additionally provided with the button being detachably connected with it at the top of the push rod.
The beneficial effects of the utility model are compared with the prior art：1. the brake valve in the utility model has lock
The function of tight spool, and it is simple in structure, it can realize and quickly and effectively leak informaton；2. by adjusting the adjusting bolt or ladder of retaining mechanism
The trapezoidal side of shape slot and the angle on base obtain the effect of optimal locking spool；3. the open and-shut mode of brake valve is sent in real time；
4. good airproof performance, it is ensured that the operation is stable.
Description of the drawings
Fig. 1 is the sectional view under the utility model braking valve closing state；
Fig. 2 is the sectional view under the utility model braking the valve opening state；
Fig. 3 is the sectional view of the valve body of the utility model brake valve；
Fig. 4 is the structure diagram of the adjusting screw rod of brake valve in example IV；
Fig. 5 is the connection diagram that quick-action switch one under valve closing state is braked in example IV；
Fig. 6 is the connection diagram that quick-action switch two under valve closing state is braked in example IV；
Fig. 7 is the circuit diagram that quick-action switch under valve closing state is braked in example IV；
Fig. 8 is the connection diagram that quick-action switch one under the valve opening state is braked in example IV；
Fig. 9 is the connection diagram that quick-action switch two under the valve opening state is braked in example IV；
Figure 10 is the circuit diagram that quick-action switch under the valve opening state is braked in example IV；
Figure 11 is that valve closing state lower push-rod and the connection diagram of steel ball A are braked in embodiment two；
Figure 12 is that the valve opening state lower push-rod and the connection diagram of steel ball A are braked in embodiment two.
Specific embodiment
Below in conjunction with attached drawing, technical characteristic above-mentioned to the utility model and other and advantage are described in more detail.
Embodiment one
Shown in please referring to Fig.1 to Fig.3, sectional view under valve closing state is braked for the utility model, under opening state
Sectional view and valve body sectional view.
With reference to shown in Fig. 1 and Fig. 3, a kind of brake valve, including valve body 1, valve deck 2, spool 3, push rod 4 and retaining mechanism, institute
It states and inlet air plenum 11 and room 12 of leaking informaton is equipped in valve body 1, valve port 6, the valve deck 2 are equipped between the inlet air plenum 11 and room 12 of leaking informaton
To be detachably connected between valve body 1, thrust spring 21 is equipped between the valve deck 2 and the bottom of spool 3, the spool 3
Valve port 6 is withstood at top, and the brake valve is made to be in normally off, and one end of the push rod 4 penetrates the top in valve body 1 with spool 3
Portion contradicts connection, and the push rod 4 is equipped with several limiting slots, and the preferred quantity of limiting slot described in the present embodiment is two,
It is corresponding with the position of the spool 3, and the spool 3 is contributed to be accurately positioned, respectively upper locking slot 41 and lower locking slot
42, the retaining mechanism is connected with limiting slot.
As shown in Figure 1, when the brake valve is in off state, the retaining mechanism acts on lower locking slot 42, locking
The position of the push rod 4, at this time the spool 3 sealed valve port 6 upwards by the power effect of thrust spring 21, then the inlet air plenum 11
Room 12 isolates with leaking informaton；As shown in Fig. 2, when the push rod 4 is subject to external force effect to move downward, promote the spool 3 downward
Movement, the inlet air plenum 11 are communicated with room 12 of leaking informaton so that and the brake valve is in an open state, and realization promptly puts wind action,
The retaining mechanism acts on locking slot 41 at this time, locks the position of the push rod 4, so as to play the role of locking spool 3.
Wherein, it is described to be detachably connected as being connected through a screw thread or being clamped connection, the present embodiment between valve deck 2 and valve body 1
Using threaded connection, i.e., described valve deck 2 is equipped with external screw thread, and rotation is fixed on the valve body 1；The valve deck 2 is bottom
Groove equipped with thrust spring 21, the groove are equipped with through hole, cause the air and outside air phase in the valve deck 2
It is logical, generate air drag when preventing the spool 3 from being moved up and down in valve deck；The upper and lower ends of the spool 3 are respectively equipped with one
A mounting groove, for placing push rod 4, the lower end mounting groove is used to place thrust spring 21, and two the upper end mounting groove
Through hole is equipped between mounting groove, is used to prevent the push rod 4 from generating air drag when moving up and down；The push rod 4, spool
3rd, thrust spring 21 and valve deck 2 contradict connection successively between each other, and in the case where the brake valve opens or closes state, mutually
It does not depart from, i.e., described push rod 4 only moves up and down in the upper end mounting groove of spool 3, and the spool 3 only moves down on valve deck 2 is interior
Dynamic, the thrust spring 21 only stretches in the lower end mounting groove of spool 3 and the groove of valve deck 2.
As shown in figure 3, the top of the valve body 1 is equipped with the through hole 13 passed through for push rod 4, the inlet air plenum 11 and room of leaking informaton
12 are located at the both sides of valve body 1, and the import of the inlet air plenum 11 and the outlet for room 12 of leaking informaton are separately positioned on the bottom of valve body 1, institute
The outlet of inlet air plenum 11 is stated less than the import for room of leaking informaton, is connected between the two by valve port 6, the brake valve is contributed to close
Spool 3 seals valve port during state；As shown in Figure 1, the push rod 4 is equipped with limiting stand 43, outer diameter is more than the through hole 13
Internal diameter, when needing to close the brake valve, the push rod 4 moves up, and the steel ball A 51 is fallen into lower locking slot 42, this
Shi Suoshu limiting stands 43 are used to prevent when the push rod from moving up since maloperation causes by the end face bumping post in valve body 1
It departs from valve body；The brake valve further includes dust cover 7, and top edge is connected on the push rod 4, and lower edge is connected to institute
It states on valve body 1, for anti-throw-out lever 4 into valve body when brings foreign matter into, and influences the movement of push rod 4, and the dust cover 7 is with pushing away
The movement of bar 4 and deform, but its lower edges will not depart from from push rod 4 and valve body 1；4 top of push rod is additionally provided with and it
By an elastic cylinder pin connection between the button 8 being detachably connected, with the push rod 4, the button 8 is mushroom shaped,
Contribute to the forced area of increase push rod 4.
Brake valve in the utility model, it is simple in structure, and can realize and quickly and effectively leak informaton, one end of the spool 3
It is withstood by thrust spring 21, the other end is withstood by push rod 4, and the thrust spring 21 and push rod 4 promote spool 3 jointly, play system
The function that dynamic valve is turned on and off, and the push rod 4 with locking function and retaining mechanism can lock the position of push rod 4, from
And play the role of locking spool.
Embodiment two
A kind of brake valve as described above, the present embodiment is different from part and is, as shown in Figure 1, the retaining mechanism
Including steel ball A 51, elastic element and adjustment part for adjusting the elastic element stroke, the steel ball A 51 is by elasticity
Element, which is withstood, to be fallen into one of limiting slot, is used to fix the position of the push rod 4, and then locking spool.
Wherein, in the present embodiment, as shown in Figure 1, the elastic element is preferably retaining spring 52, the adjustment part is preferred
For adjusting bolt 53；The tensile force of retaining spring 52 can be adjusted by adjusting the adjusting bolt 53, so as to adjust 51 Hes of steel ball A
The coupling mechanism force of limiting slot.When the brake valve is in off state, the steel ball A 51 is fallen into lower locking slot 42, the push rod
4 stress point is the upper trapezoid side of lower locking slot 42 and the contact point of steel ball A 51, and the power of generation is F1；When the brake valve is
During opening state, realization promptly puts wind action, and the steel ball A 51 is skidded off from lower locking slot 42 and fallen into upper locking slot 41,
The stress point of the push rod 4 is the lower trapezoid side of upper locking slot 41 and the contact point of steel ball A 51, and the power of generation is F2。
Embodiment three
A kind of brake valve as described above, the present embodiment are different from part and are, as is illustrated by figs. 11 and 12, the limit
Position slot is dovetail groove, i.e., upper locking slot 41 and lower locking slot 42 are dovetail groove, and trapezoidal side and lower trapezoid side and base thereon
Angle be obtuse angle, the angle on the upper trapezoid side and base is 90 ° of+α1, the angle on the lower trapezoid side and base is 90 °
+α2.The α1Scope for 20 °~60 °, in order to reduce the strength for promoting the push rod 4, prevent that the spool 3 from being locked,
And the brake valve is caused to can not achieve the function of promptly leaking informaton；The α2Scope for 0 °~45 °, be conducive to the brake valve
Prevent the spool 3 from springing back in the case of emergency braking.
By the power F1It is decomposed into the power F of vertical directionBarWith the power F of horizontal direction1 lock, the power F2It is decomposed into vertical direction
Power FCoreWith the power F of horizontal direction2 locks, then
FBar=F1 lock×cotα1,
FCore=F2 locks×cotα2,
Wherein, FBarSteel ball A 51 limits the resistance that push rod 4 declines, F during for the brake valve in off position1 lockTo be described
Brake valve in off position when steel ball A 51 be subject to the elastic force of retaining spring 52, FCoreFor the brake valve in opening state steel ball
A 51 limits the resistance that push rod 4 rises, that is, locks the power of spool 3, F2 locksFor the brake valve in opening state steel ball A 51 by
To the elastic force of retaining spring 52.
It understands, the F1 lockAnd F2 locksSize the tensile force of retaining spring 52 adjusted by adjusting adjusting bolt 53 change
Become, the α1And α2Change by adjusting the angle of dovetail groove.When the tensile force of the retaining spring 52 is constant, the α1
And α2Value it is smaller, corresponding FBarAnd FCoreValue it is bigger；As the α1And α2Value when immobilizing, the F1 lockAnd F2 locksValue
It is bigger, corresponding FBarAnd FCoreValue it is bigger.
To sum up, the adjusting bolt 53 of the retaining mechanism or the lower trapezoid side and base of the adjustment dovetail groove are individually adjusted
Angle, can realize the function of locking the spool 3, and the two is applied in combination, it is better.
Example IV
A kind of brake valve as described above, the present embodiment with embodiment one the difference is that, as shown in Figure 1, further including
State communication means, including steel ball B 91, switch module and switch, switch described in the present embodiment is preferably quick-action switch
92, the steel ball B 91 are arranged between push rod 4 and switch module, and the switch module is contradicted with quick-action switch 92 and connected, and works as institute
When stating push rod 4 and moving up and down, the steel ball B 91 is moved left and right with falling into or eject limiting slot realization, so as to drive described open
It closes component to move left and right, completes the energization switching of the quick-action switch 92, the quick-action switch 92 connects with indicator light or display
It connects, the "on" position of the quick-action switch 92 is corresponding with the open and-shut mode of brake valve.
With reference to shown in Fig. 1 and Fig. 4, the switch module includes switch spring 93, switch spring seat 94,95 and of adjusting screw rod
Displaced block 96 is switched, the switch spring 93 is arranged in switch spring seat 94, and is socketed on the adjusting screw rod 95, the tune
It saves 95 one end of screw rod and is equipped with external screw thread 951, be connected with the switch displaced block 96, the other end is conformed with 952 and cone tank
953, the protrusion 952 is used for 93 /V of switch spring, and the cone tank 953 is contradicted with steel ball B 91 and connected.
Wherein, as shown in Fig. 2, when the push rod 4 is pushed downward mobile, the push rod 4 also promotes spool 3 to moving down
Dynamic, the spool 3 departs from valve port 6 so that the inlet air plenum 11 is communicated with room 12 of leaking informaton, and realizes effect of promptly leaking informaton, at this time
The steel ball B 91 is fallen into the lower trapezoid slot 42 of push rod 4, and the adjusting screw rod 95 is driven to move right, and realizes that the quick-action is opened
Close the switching of "on" position.
The quick-action switch 92 is connected by an installing plate with valve body 1, in the present embodiment, the quantity of the quick-action switch 92
For two, i.e. quick-action switch one and quick-action switch two, to ensure that state communication information is reliable, the quick-action switch 92 is equipped with four
A contact and quick-action switch button, the quick-action switch button is contradicted with adjusting screw rod 95 and connected, as shown in Figure 5 and Figure 6, described
There are contact 1,2,3,4 and quick-action switch button 921 on quick-action switch one, there is contact 5,6,7,8 and speed on the quick-action switch two
Dynamic switch button 922.When the brake valve is in off state, as shown in Figures 5 to 7, the quick-action switch button 921 and speed
Dynamic switch button 922 is in pressed status, and the contact 1,4,5,8 is powered at this time, and the contact 2,3,6,7 powers off；When described
When brake valve is in an open state, as shown in Fig. 8 to Figure 10, the quick-action switch button 921 and quick-action switch button 922 are in bullet
The state of rising, the energization of contact 2,3,6,7 at this time, the contact 1,4,5,8 powers off.The break-make of the contact of the quick-action switch 92
Indicator light, computer or display screen are connected, the signal of the brake valve opening and closing can be provided in time, the automation for being conducive to locomotive is remote
Process control.
Embodiment five
A kind of brake valve as described above, the present embodiment with embodiment one the difference is that, be additionally provided with sealing device,
For ensureing the air-tightness of the brake valve so that the work of the brake valve is more stablized.
As shown in Figure 1, being equipped with O-ring seal 22 on the valve deck 2, it is arranged between the valve deck 2 and valve body 1, makes
It obtains air tight during the two rotatable engagement；The spool 3 is equipped with valve pad 31 and K-type sealing ring 32, and the valve pad 31 is embedded in spool 3
Upper surface, preferred cross sectional shape be trapezoidal shape, to prevent it from coming off easily from the spool 3, and be conducive to the valve
Sealing between core 3 and valve port 6, the K-type sealing ring 32 are arranged on the valve deck 2 on the side contact surface of spool 3, having
Closed type is reliable, frictional resistance is small so that the spool 3 stable movement on valve deck 2；The push rod 4 is equipped with O-ring seal
44, it is arranged on the side contact surface of the push rod 4 and spool 3, to prevent outside air and inlet air plenum 11 or room 12 of leaking informaton
Air communicate；As shown in Fig. 2, the valve port 6 is equipped with boss 61 and O-ring seal 62, the boss 61 is used for and spool 3
On valve pad 31 contradict connection, promote the air-tightness between the spool 3 and valve port 6, the O-ring seal 62 is arranged on valve port
6, on the side contact surface of valve body 1, ensureing when the spool 3 seals valve port 6, prevent the inlet air plenum 11 and room 12 of leaking informaton
Air communicate.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
Art personnel on the premise of the utility model method is not departed from, can also make several improvement and supplement, these are improved and supplement
Also it should be regarded as the scope of protection of the utility model.
Claims (10)
1. a kind of retaining mechanism, which is characterized in that stretch including push rod, steel ball A, elastic element and for adjusting the elastic element
The adjustment part of contracting amount, the push rod are equipped with several limiting slots, and the steel ball A is withstood by elastic element falls into one of limit
In the slot of position, locking function is realized.
2. retaining mechanism according to claim 1, which is characterized in that the elastic element is retaining spring.
3. retaining mechanism according to claim 1, which is characterized in that the adjustment part is adjusting bolt.
4. retaining mechanism according to claim 1, which is characterized in that the limiting slot is dovetail groove.
5. retaining mechanism according to claim 4, which is characterized in that the upper trapezoid of the dovetail groove while and during lower trapezoid with
The angle on base is obtuse angle, and the angle on the upper trapezoid side and base is 90 ° of+α1, the angle on the lower trapezoid side and base
For 90 ° of+α2。
6. retaining mechanism according to claim 5, which is characterized in that the α1Scope for 20 °~60 °, the α2Model
It encloses for 0 °~45 °.
7. a kind of brake valve with any retaining mechanisms of claim 1-6, which is characterized in that including valve body, valve deck,
Spool and the retaining mechanism, the valve body is interior to be equipped with inlet air plenum and room of leaking informaton, and valve is equipped between the inlet air plenum and room of leaking informaton
Mouthful, to be detachably connected between the valve deck and valve body, thrust spring, the valve are equipped between the valve deck and the bottom of spool
Valve port is withstood at the top of core, the brake valve is made to be in normally off, one end of the push rod penetrates the top in valve body with spool
Portion contradicts connection, and the quantity of the push rod upper limit position groove is two, corresponding with the position of the spool, respectively upper locking
Slot and lower locking slot.
8. brake valve according to claim 7, which is characterized in that be additionally provided with sealing device.
9. brake valve according to claim 7, which is characterized in that further include dust cover, top edge is connected to described push away
On bar, lower edge is connected on the valve body, and foreign matter is brought into when entering valve body for anti-throw-out lever.
10. brake valve according to claim 7, which is characterized in that be additionally provided at the top of the push rod and be detachably connected with it
Button.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721441328.2U CN207374363U (en) | 2017-11-02 | 2017-11-02 | A kind of retaining mechanism and the brake valve with the structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721441328.2U CN207374363U (en) | 2017-11-02 | 2017-11-02 | A kind of retaining mechanism and the brake valve with the structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207374363U true CN207374363U (en) | 2018-05-18 |
Family
ID=62333887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721441328.2U Expired - Fee Related CN207374363U (en) | 2017-11-02 | 2017-11-02 | A kind of retaining mechanism and the brake valve with the structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207374363U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759517A (en) * | 2018-06-25 | 2018-11-06 | 孙菊萍 | A kind of environment-friendly type copper-coated gas heat exchanger |
| CN109703543A (en) * | 2018-12-29 | 2019-05-03 | 山东吉利达智能装备集团有限公司 | Braking valve for vehicle |
| RU221208U1 (en) * | 2023-09-06 | 2023-10-25 | Акционерное общество МТЗ ТРАНСМАШ | EMERGENCY BRAKING VALVE |
-
2017
- 2017-11-02 CN CN201721441328.2U patent/CN207374363U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759517A (en) * | 2018-06-25 | 2018-11-06 | 孙菊萍 | A kind of environment-friendly type copper-coated gas heat exchanger |
| CN109703543A (en) * | 2018-12-29 | 2019-05-03 | 山东吉利达智能装备集团有限公司 | Braking valve for vehicle |
| RU221208U1 (en) * | 2023-09-06 | 2023-10-25 | Акционерное общество МТЗ ТРАНСМАШ | EMERGENCY BRAKING VALVE |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20180518 |