CN206243240U - A kind of Flow amplification load sensing hydraulic system - Google Patents
A kind of Flow amplification load sensing hydraulic system Download PDFInfo
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- CN206243240U CN206243240U CN201621401243.7U CN201621401243U CN206243240U CN 206243240 U CN206243240 U CN 206243240U CN 201621401243 U CN201621401243 U CN 201621401243U CN 206243240 U CN206243240 U CN 206243240U
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- hydraulic fluid
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- steering
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Abstract
The utility model discloses a kind of Flow amplification load sensing hydraulic system, including Variable plunger pump, flux amplification valve, steering gear, the first steering cylinder, the second steering cylinder, flux amplification valve includes the guide's fuel oil supply unit and the main valve plug that are connected between P1 hydraulic fluid ports and Pst hydraulic fluid ports；The a hydraulic fluid ports of the R hydraulic fluid port connection traffic amplifying valves of steering gear；The b hydraulic fluid ports of the L hydraulic fluid port connection traffic amplifying valves of steering gear；When steering gear is turned left, a hydraulic fluid ports, B hydraulic fluid ports are connected with main valve plug respectively with Ls feedback hydraulic fluid ports, and A hydraulic fluid ports are connected with T hydraulic fluid ports, and the B hydraulic fluid ports of flux amplification valve connect the L2 hydraulic fluid ports of the first steering cylinder and the R1 hydraulic fluid ports of the second steering cylinder；The Ls of flux amplification valve feeds back the X hydraulic fluid ports of hydraulic fluid port link variable plunger pump control mechanism, the T hydraulic fluid ports and T1 hydraulic fluid port connected tanks of flux amplification valve.The utility model is the Flow amplification system based on variable pump, is integrated with guide's fuel oil supply unit, the guide oil of stabilization is provided for steering gear or other pilot control systems, to simplify system.
Description
Technical field
The utility model is related to a kind of hydraulic system, specifically a kind of Flow amplification load sensing hydraulic system.
Background technology
At present, the hydraulic system on loading machine mainly has two kinds of hydraulic system of working and steering hydraulic system, and two germlines
The hydraulic power source of system is typically quantitative gear pump, i.e., common fixed dilivery hydraulic system.Steering hydraulic system is more to be turned with Flow amplification
Based on hydraulic system, i.e., the flux amplification valve of huge discharge is controlled with the steering gear of small displacement, realize the function of Flow amplification.By
There is performance well relative to other steering hydraulic systems at aspects such as handling and energy-conservations in such steering hydraulic system,
Therefore in industry using relatively broad.
The existing Flow amplification steering hydraulic system based on quantitative gear pump mainly has two functions：Flow amplification and turn
To preferential.By taking 5 tons of type loading machines as an example, in the steering hydraulic system of configuration small displacement steering gear and flux amplification valve, lead to
The discharge capacity of normal steering gear is in 100ml/r or so, and the output flow of flux amplification valve is then in 100L/min or so, steering gear output
Hydraulic oil act on the two ends of flux amplification valve main valve plug, it is fixed after the pressure difference produced using throttle orifice promotes main valve plug to act
The hydraulic oil of flux gear pump output is entered steering cylinder, i.e. system and realizes and obtained with small course changing control flow by main valve plug again
Obtain the effect of steering output flow greatly.Another function of the flux amplification valve is in steering hydraulic system and working hydraulic pressure system
System works simultaneously when, can preferentially ensure to give steering hydraulic system fuel feeding.The function is mainly by controlling what valve element was realized, its master
It is only when the flow for entering steering hydraulic system is sufficiently large, by the flow in the pressure difference by being set up after main valve plug to want principle
Just it is enough to promote control valve element to move to left, and then remaining flow is conveyed to hydraulic system of working.
Continuous lifting with country to engineering machinery emission request, and each main engine plants in product up-gradation dynamics not
Disconnected to increase, application of the variable delivery hydraulic system on loading machine is more and more.Variable delivery hydraulic system can realize fuel feeding on demand, overflow
Loss is small, is acted at energy-saving aspect and protruded, and also has extraordinary expansion in the control mode of system.
But the existing Flow amplification steering hydraulic system based on constant displacement pump cannot be diverted directly in variable system.With
As a example by steering hydraulic system based on load-reacting plunger displacement pump, load pressure signal must be fed back to Variable plunger pump by it
Adjuster, then by the discharge capacity of adjuster control variables plunger displacement pump, and then realize fuel feeding on demand；And quantitative steering hydraulic system
Load pressure signal be then feed back to control valve element one end, realize Ioad-sensing control by controlling valve.
Utility model content
The purpose of this utility model is to provide a kind of loading machine steering hydraulic system that can be applied to variable pump, to solve
The problem proposed in certainly above-mentioned background technology.
To achieve the above object, the utility model uses following technical proposals：
A kind of Flow amplification load sensing hydraulic system, including Variable plunger pump, flux amplification valve, steering gear, first turn
To oil cylinder, the second steering cylinder, the flux amplification valve also includes P1 hydraulic fluid ports, Pst hydraulic fluid ports, a hydraulic fluid ports, b hydraulic fluid ports, A hydraulic fluid ports, B oil
Mouth, T hydraulic fluid ports, T1 hydraulic fluid ports, Ls feedback hydraulic fluid port；The flux amplification valve includes the guide being connected between P1 hydraulic fluid ports and Pst hydraulic fluid ports
Fuel oil supply unit and main valve plug, the Variable plunger pump include variable piston pump control mechanism；
The oil-out B connection traffic amplifying valve P1 hydraulic fluid ports of the Variable plunger pump, the Pst hydraulic fluid ports connection of flux amplification valve turns
To the P2 hydraulic fluid ports of device；The a hydraulic fluid ports of the R hydraulic fluid port connection traffic amplifying valves of steering gear；The L hydraulic fluid port connection traffic amplifying valves of steering gear
B hydraulic fluid ports；When the steering gear is turned left, a hydraulic fluid ports, B hydraulic fluid ports are connected with main valve plug respectively with Ls feedback hydraulic fluid ports, and A hydraulic fluid ports are oily with T
Mouth connection；When the steering gear is turned left, the b hydraulic fluid ports, A hydraulic fluid ports feed back hydraulic fluid port and are connected with main valve plug respectively with Ls, B hydraulic fluid ports and T
Hydraulic fluid port is connected；When the steering gear is not rotated, the Ls feedbacks hydraulic fluid port is connected with T hydraulic fluid ports；The A hydraulic fluid ports of flux amplification valve connect first
The L1 hydraulic fluid ports of steering cylinder and the R2 hydraulic fluid ports of the second steering cylinder；The B hydraulic fluid ports of flux amplification valve connect the L2 oil of the first steering cylinder
The R1 hydraulic fluid ports of mouth and the second steering cylinder, the X oil of the Ls feedback hydraulic fluid port link variable plunger pump control mechanisms of the flux amplification valve
Mouthful, the T hydraulic fluid ports and T1 hydraulic fluid port connected tanks of flux amplification valve；
Used as further program of the utility model, guide's fuel oil supply unit is by a pressure-reducing valve and overflow valve inserting group
Into the oil inlet connection P1 hydraulic fluid ports of the pressure-reducing valve, the oil-out connection Pst hydraulic fluid ports of the pressure-reducing valve connect by the overflow valve
On pipeline between the oil-out and the Pst hydraulic fluid ports of the pressure-reducing valve, the overflow valve outlet is also connected with the T1 hydraulic fluid ports.
Used as further program of the utility model, the flux amplification valve also includes overload oil compensating valve, and the overload is mended
Fuel tap is connected between A hydraulic fluid ports and T hydraulic fluid ports and B hydraulic fluid ports and T hydraulic fluid ports.
Used as further program of the utility model, the flux amplification valve also includes pressure limiting valve, the pressure limiting valve connection
Fed back between hydraulic fluid port and T hydraulic fluid ports in the Ls.
Used as further program of the utility model, the flux amplification valve also includes safety valve, the safety valve connection
It is between P1 hydraulic fluid ports and T1 hydraulic fluid ports and in parallel with guide's fuel oil supply unit.
The present invention possesses Flow amplification function, and the steering gear is small displacement steering gear, and discharge capacity is 100ml/r.Using this
The low discharge hydraulic oil of steering gear output acts on the two ends of flux amplification valve main valve plug, control master as pilot control fluid
Valve element is moved left and right and commutated, and then causes that the high-volume hydraulic oil that Variable plunger pump conveying comes turns by entering after main valve plug
To oil cylinder, left and right turn is completed.
Guide's fuel oil supply unit is integrated on flux amplification valve by the form of inserted valve, and its principle is：Variable piston
The hydraulic oil that pump conveying comes maintains certain after the internal galleries of flux amplification valve enter the pressure-reducing valve of guide's fuel oil supply unit
Definite value, can provide guide's hydraulic oil of stabilization for steering gear or other pilot control systems；In guide's fuel oil supply unit
Overflow valve effect be when system pressure is higher, play a part of overflow protection.
Existing Flow amplification load sensing hydraulic system, mostly confluent type, will steering hydraulic oil interflow arrive
Work system, the present invention is independent flux amplification valve load sensing hydraulic system, and it is real to tease and ridicule section by the change of Variable plunger pump
Now fuel feeding on demand, does not share hydraulic power source with other hydraulic systems.
The beneficial effects of the utility model are：
1st, present invention could apply to be based on the loading machine steering hydraulic system of load-reacting pump, load-sensitive is realized
Control, enriches the form of loading machine variable delivery hydraulic system；The present invention can also be expanded and be applied to the change of other configurations load-sensitive
Measure the Flow amplification type hydraulic system of plunger displacement pump.
2nd, the present invention is based on the Flow amplification system of constant displacement pump compared to other, without configuring pioneer pump, but in flow
Guide's fuel oil supply unit is integrated with amplifying valve, the guide oil of stabilization can be provided for steering gear or other pilot control systems,
To simplify system.
Brief description of the drawings
Fig. 1 is the Flow amplification load sensing hydraulic system schematic diagram in embodiment；
Wherein, 1. Variable plunger pump, 2. flux amplification valve, 3. steering gear, 4. guide's fuel oil supply unit, 5. the first steering oil
Cylinder, 6. the second steering cylinder, 7. overload oil compensating valve, 8. main valve plug, 9. pressure limiting valve, 10. variable piston pump control mechanism, 11. decompressions
Valve, 12. overflow valves, 13. safety valves.
Specific embodiment
To achieve the above object, the present invention uses following technical proposals：
A kind of Flow amplification load sensing hydraulic system, it is characterised in that including Variable plunger pump 1, flux amplification valve 2,
Steering gear 3, the first steering cylinder 5, the second steering cylinder 6, the flux amplification valve 2 include P1 hydraulic fluid ports, Pst hydraulic fluid ports, a hydraulic fluid ports, b
Hydraulic fluid port, A hydraulic fluid ports, B hydraulic fluid ports, T hydraulic fluid ports, T1 hydraulic fluid ports, Ls hydraulic fluid ports；The flux amplification valve 2 includes being connected to P1 hydraulic fluid ports and Pst hydraulic fluid ports
Between guide's fuel oil supply unit 4 and main valve plug 8, wherein the P1 hydraulic fluid ports, a hydraulic fluid ports, b hydraulic fluid ports, A hydraulic fluid ports, B hydraulic fluid ports, T hydraulic fluid ports, Ls
Feedback hydraulic fluid port is connected with main valve plug 8 respectively, and the Variable plunger pump 2 includes variable piston pump control mechanism 10；
The oil-out B connection traffic amplifying valve P1 hydraulic fluid ports of the Variable plunger pump 1, the Pst hydraulic fluid ports connection of flux amplification valve
The P2 hydraulic fluid ports of steering gear；The a hydraulic fluid ports of steering gear R hydraulic fluid port connection traffic amplifying valves；The L hydraulic fluid port connection traffic amplifying valves of steering gear
B hydraulic fluid ports；The A hydraulic fluid ports of flux amplification valve connect the L1 hydraulic fluid ports of the first steering cylinder and the R2 hydraulic fluid ports of the second steering cylinder；Flow amplification
The B hydraulic fluid ports of valve connect the L2 hydraulic fluid ports of the first steering cylinder and the R1 hydraulic fluid ports of the second steering cylinder, the Ls feedbacks of the flux amplification valve
The X hydraulic fluid ports of hydraulic fluid port link variable plunger pump control mechanism, the T hydraulic fluid ports and T1 hydraulic fluid port connected tanks of flux amplification valve 2.
When the steering gear 3 is turned right, the steering gear R hydraulic fluid ports are fuel-displaced, and enter flux amplification valve 2 by a hydraulic fluid ports, promote
Main valve plug 8 is moved to right, and oil return then passes back into steering gear L hydraulic fluid ports, and then oil return box by b hydraulic fluid ports；The main valve of the flux amplification valve 2
After core 8 is acted, the hydraulic oil of big flow enters from the P1 hydraulic fluid ports of flux amplification valve, few section hydraulic after being throttled through main valve plug 8
Pressure signal is fed back hydraulic fluid port and feeds back to variable piston pump control mechanism 10 by oil by Ls, and most fluid then enter from B hydraulic fluid ports
The L2 hydraulic fluid ports of the first steering cylinder and the R1 hydraulic fluid ports of the second steering cylinder, promote cylinder action, and then realize that vehicle frame is turned to the right,
A hydraulic fluid ports are connected with T hydraulic fluid ports simultaneously.
When the steering gear 3 is turned left, the steering gear L hydraulic fluid ports are fuel-displaced, and enter flux amplification valve 2 by b hydraulic fluid ports, promote
Main valve plug 8 is moved to left, and oil return then passes back into steering gear R hydraulic fluid ports, and then oil return box by a hydraulic fluid ports；The main valve of the flux amplification valve 2
After core action, the hydraulic oil of big flow enters from the P1 hydraulic fluid ports of flux amplification valve, few section hydraulic oil after being throttled through main valve plug
Pressure signal is fed back into hydraulic fluid port by Ls and feeds back to variable piston pump control mechanism, most fluid then enter first from A hydraulic fluid ports
The L1 hydraulic fluid ports of steering cylinder and the R2 hydraulic fluid ports of the second steering cylinder, promote cylinder action, and then realize that vehicle frame is turned to the left, while
B hydraulic fluid ports are connected with T hydraulic fluid ports.
When the steering gear 3 is not turned to, Ls feedback hydraulic fluid port connection fuel tanks, the Low-pressure load discharge of Variable plunger pump 1.
It is further preferred that guide's fuel oil supply unit 4 is made up of a pressure-reducing valve 11 and the inserting of overflow valve 12, it is described to subtract
The oil inlet connection P1 hydraulic fluid ports of pressure valve 11, the oil-out connection Pst hydraulic fluid ports of the pressure-reducing valve 11, are connected on institute by the overflow valve 12
State on the pipeline between the oil-out of pressure-reducing valve 11 and the Pst hydraulic fluid ports, the outlet of the overflow valve 12 is also connected with the T1 hydraulic fluid ports.
It is further preferred that the flux amplification valve 2 also includes overload oil compensating valve 7, the overload oil compensating valve 7 is connected respectively
Between A hydraulic fluid ports and T hydraulic fluid ports and B hydraulic fluid ports and T hydraulic fluid ports.
It is further preferred that the flux amplification valve also includes pressure limiting valve 9, the pressure limiting valve 9 is connected in parallel on main valve plug 8 and Ls
On pipeline between feedback hydraulic fluid port, to limit load maximum pressure.
It is further preferred that the flux amplification valve 9 also include safety valve 13, the safety valve 13 be connected to P1 hydraulic fluid ports and
It is between T1 hydraulic fluid ports and in parallel with guide's fuel oil supply unit 4.
The present invention utilizes the adjuster being integrated in inside Variable plunger pump, by the pressure at flux amplification valve main valve plug valve port two ends
Difference maintains a definite value, so just ensure that, i.e. institute only relevant with the aperture of valve port by the flow of flux amplification valve main valve plug
Stating Variable plunger pump can realize fuel feeding on demand according to the valve port opening of flux amplification valve main valve plug, it is ensured that system has fine
Steering manipulation.
Flow amplification load sensing hydraulic system of the present invention mainly has three kinds of mode of operations, and one is to work as to turn
Xiang Shi, Variable plunger pump perceives Ls mouthfuls of feedback pressure, and discharge capacity is minimized, Low-pressure load discharge.Two is such as side of turning right when turning to
During to disk, steering wheel drives steering gear to turn right.The guide that the hydraulic oil that Variable plunger pump conveying comes passes through flux amplification valve
Fuel oil supply unit enters steering gear, and then the hydraulic oil of low discharge is just exported from the R hydraulic fluid ports of steering gear, and by flux amplification valve a
Hydraulic fluid port is applied on flux amplification valve main valve plug, and flux amplification valve main valve plug is moved to right, and left position is connected, now Variable plunger pump conveying
The high-volume hydraulic oil for coming then enters into steering cylinder by flux amplification valve main valve plug from B mouthfuls of output, and realization is turned to the right.Together
When, by Ls mouthfuls be drawn out on the adjuster of Variable plunger pump load pressure by flux amplification valve, realizes Ioad-sensing control.When
Turn left steering wheel when, be similar to it, realization turn to the left.Three is that at the end of turning to, i.e., oil cylinder is all acted in place, variable post
Pressure cut off valve events in plug pump control mechanism, realize high-pressure low-flow off-load.
It is not new to this practicality although above-mentioned be described with reference to accompanying drawing to specific embodiment of the present utility model
The limitation of type protection domain, one of ordinary skill in the art should be understood that on the basis of the technical solution of the utility model, ability
Various modifications or deform still in protection model of the present utility model that field technique personnel make by need not paying creative work
Within enclosing.
Claims (5)
1. a kind of Flow amplification load sensing hydraulic system, it is characterised in that including Variable plunger pump, flux amplification valve, steering
Device, the first steering cylinder, the second steering cylinder, the flux amplification valve also include P1 hydraulic fluid ports, Pst hydraulic fluid ports, a hydraulic fluid ports, b hydraulic fluid ports, A
Hydraulic fluid port, B hydraulic fluid ports, T hydraulic fluid ports, T1 hydraulic fluid ports, Ls feedback hydraulic fluid ports；The flux amplification valve include being connected to P1 hydraulic fluid ports and Pst hydraulic fluid ports it
Between guide's fuel oil supply unit and main valve plug, the Variable plunger pump include variable piston pump control mechanism；
The oil-out B connection traffic amplifying valve P1 hydraulic fluid ports of the Variable plunger pump, the Pst hydraulic fluid ports connection steering gear of flux amplification valve
P2 hydraulic fluid ports；The a hydraulic fluid ports of the R hydraulic fluid port connection traffic amplifying valves of steering gear；The b oil of the L hydraulic fluid port connection traffic amplifying valves of steering gear
Mouthful；When the steering gear is turned right, a hydraulic fluid ports, B hydraulic fluid ports are connected with main valve plug respectively with Ls feedback hydraulic fluid ports, A hydraulic fluid ports and T hydraulic fluid ports
Connection；When the steering gear is turned left, the b hydraulic fluid ports, A hydraulic fluid ports are connected with main valve plug respectively with Ls feedback hydraulic fluid ports, and B hydraulic fluid ports are oily with T
Mouth connection；When the steering gear is not rotated, the Ls feedbacks hydraulic fluid port is connected with T hydraulic fluid ports；The A hydraulic fluid ports of flux amplification valve connect first turn
To the L1 hydraulic fluid ports and the R2 hydraulic fluid ports of the second steering cylinder of oil cylinder；The B hydraulic fluid ports of flux amplification valve connect the L2 hydraulic fluid ports of the first steering cylinder
With the R1 hydraulic fluid ports of the second steering cylinder, the Ls of the flux amplification valve feeds back the X hydraulic fluid ports of hydraulic fluid port link variable plunger pump control mechanism,
The T hydraulic fluid ports and T1 hydraulic fluid port connected tanks of flux amplification valve.
2. Flow amplification load sensing hydraulic system as claimed in claim 1, it is characterised in that guide's fuel oil supply unit by
One pressure-reducing valve and overflow valve inserting composition, the oil inlet connection P1 hydraulic fluid ports of the pressure-reducing valve, the oil-out of the pressure-reducing valve connect
Pst hydraulic fluid ports are connect, is connected on by the overflow valve on the pipeline between the oil-out of the pressure-reducing valve and the Pst hydraulic fluid ports, it is described to overflow
Stream valve outlet is also connected with the T1 hydraulic fluid ports.
3. Flow amplification load sensing hydraulic system as claimed in claim 1, it is characterised in that the flux amplification valve is also wrapped
Overload oil compensating valve is included, the overload oil compensating valve is connected between A hydraulic fluid ports and T hydraulic fluid ports and B hydraulic fluid ports and T hydraulic fluid ports.
4. Flow amplification load sensing hydraulic system as claimed in claim 1, it is characterised in that the flux amplification valve is also wrapped
Pressure limiting valve is included, the pressure limiting valve is connected between the Ls feedback hydraulic fluid ports and T hydraulic fluid ports.
5. Flow amplification load sensing hydraulic system as claimed in claim 1, it is characterised in that the flux amplification valve is also wrapped
Safety valve is included, the safety valve is connected between P1 hydraulic fluid ports and T1 hydraulic fluid ports and in parallel with guide's fuel oil supply unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621401243.7U CN206243240U (en) | 2016-12-20 | 2016-12-20 | A kind of Flow amplification load sensing hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621401243.7U CN206243240U (en) | 2016-12-20 | 2016-12-20 | A kind of Flow amplification load sensing hydraulic system |
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| Publication Number | Publication Date |
|---|---|
| CN206243240U true CN206243240U (en) | 2017-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621401243.7U Active CN206243240U (en) | 2016-12-20 | 2016-12-20 | A kind of Flow amplification load sensing hydraulic system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106609779A (en) * | 2017-02-08 | 2017-05-03 | 雷沃重工股份有限公司 | Flow amplifying valve and loading machine variable steering hydraulic system |
| CN107697156A (en) * | 2017-08-04 | 2018-02-16 | 中国煤炭科工集团太原研究院有限公司 | There is the bracket carrier walking fluid power system of explosion-proof electro-hydraulic differential steering control device |
| CN112249154A (en) * | 2020-09-29 | 2021-01-22 | 中冶宝钢技术服务有限公司 | Hydraulic steering system and pilot oil source loading valve group thereof |
| CN112443527A (en) * | 2020-12-10 | 2021-03-05 | 徐州阿马凯液压技术有限公司 | High-flow precision flow amplifying valve |
| CN112696399A (en) * | 2021-03-25 | 2021-04-23 | 潍柴雷沃重工股份有限公司 | Hydraulic system for loading test and control method |
-
2016
- 2016-12-20 CN CN201621401243.7U patent/CN206243240U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106609779A (en) * | 2017-02-08 | 2017-05-03 | 雷沃重工股份有限公司 | Flow amplifying valve and loading machine variable steering hydraulic system |
| CN107697156A (en) * | 2017-08-04 | 2018-02-16 | 中国煤炭科工集团太原研究院有限公司 | There is the bracket carrier walking fluid power system of explosion-proof electro-hydraulic differential steering control device |
| CN112249154A (en) * | 2020-09-29 | 2021-01-22 | 中冶宝钢技术服务有限公司 | Hydraulic steering system and pilot oil source loading valve group thereof |
| CN112249154B (en) * | 2020-09-29 | 2022-03-29 | 中冶宝钢技术服务有限公司 | Hydraulic steering system and pilot oil source loading valve group thereof |
| CN112443527A (en) * | 2020-12-10 | 2021-03-05 | 徐州阿马凯液压技术有限公司 | High-flow precision flow amplifying valve |
| CN112443527B (en) * | 2020-12-10 | 2023-11-07 | 徐州阿马凯液压技术有限公司 | High-flow-precision flow amplifying valve |
| CN112696399A (en) * | 2021-03-25 | 2021-04-23 | 潍柴雷沃重工股份有限公司 | Hydraulic system for loading test and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171019 Address after: 266500 No. 75 east the Yellow River Road, Huangdao District, Shandong, Qingdao Patentee after: QINGDAO LOVOL ENGINEERING MACHINERY Co.,Ltd. Address before: 266510 No. 75 east the Yellow River Road, Huangdao District, Shandong, Qingdao Patentee before: LOVOL HEAVY INDUSTRY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 266500 No. 75 East Huanghe Road, Huangdao District, Qingdao City, Shandong Province Patentee after: LOVOL Engineering Machinery Group Co.,Ltd. Address before: 266500 No. 75 East Huanghe Road, Huangdao District, Qingdao City, Shandong Province Patentee before: QINGDAO LOVOL ENGINEERING MACHINERY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 266500 No. 75 East Huanghe Road, Huangdao District, Qingdao City, Shandong Province Patentee after: Lovol Heavy Industry Group Co.,Ltd. Address before: 266500 No. 75 East Huanghe Road, Huangdao District, Qingdao City, Shandong Province Patentee before: LOVOL Engineering Machinery Group Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |