CN202164063U - Automobile crane and suspension arm falling hydraulic system - Google Patents
Automobile crane and suspension arm falling hydraulic system Download PDFInfo
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- CN202164063U CN202164063U CN2011202228476U CN201120222847U CN202164063U CN 202164063 U CN202164063 U CN 202164063U CN 2011202228476 U CN2011202228476 U CN 2011202228476U CN 201120222847 U CN201120222847 U CN 201120222847U CN 202164063 U CN202164063 U CN 202164063U
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- falls
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- 239000000725 suspension Substances 0.000 title abstract 4
- 239000002828 fuel tank Substances 0.000 claims description 22
- 230000005484 gravity Effects 0.000 abstract description 14
- 230000008901 benefit Effects 0.000 abstract description 12
- 239000012530 fluid Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 230000007812 deficiency Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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Abstract
The utility model discloses a suspension arm falling hydraulic system which comprises a variable-amplitude cylinder, a rod chamber oil circuit connected with the rod chamber of the variable-amplitude cylinder, a rodless chamber oil circuit connected with the arm falling chamber of the variable-amplitude cylinder, and a first reversing valve connected with the rod chamber oil circuit and the rodless chamber oil circuit, wherein an overflow valve is arranged on the rod chamber oil circuit; and the rod chamber oil circuit is selectively connected with an oil tank or is disconnected from the oil tank. The utility model further discloses an automobile crane with the suspension arm falling hydraulic system. According to the suspension arm falling hydraulic system which adopts a gravity arm falling mode and a dynamic arm falling mode, the gravity arm falling mode is adopted when an object is lifted, while the dynamic arm falling mode is adopted when no object is lifted or the automobile crane is shut down, so as to fully utilize the advantages of the two arm falling modes, increase work efficiency, reduce component damages and improve the safety performance.
Description
Technical field
The utility model relates to car hosit, the arm that the relates in particular to car hosit arm hydraulic efficiency pressure system that falls.
Background technology
Car hosit is in the luffing hydraulic efficiency pressure system, and the arm arm hydraulic efficiency pressure system that falls has two kinds of forms.A kind of is the power arm that falls, and another kind is the gravity arm that falls.
The power arm that falls, promptly depended on pressure oil realizes having the arm of falling rapid speed, the advantage of high efficiency, but have shortcomings such as luffing shake, luffing bounce-back, fine motion property difference.
There is following technical barrier in the pressure oil power arm that falls:
One, luffing is opened and is impacted when stopping greatlyyer, and the arm that falls of car hosit arm is very crucial action, opens and the impact when stopping can to cause the car load shake, can damage arm and amplitude oil cylinder when serious.
Two, when stopping to occur amplitude oil cylinder, luffing rebounds; Luffing bounce-back is exactly operating personal the stretching out a bit toward an arm direction that amplitude oil cylinder in a flash after the arm action can be violent that stop to fall when arm falls arm; At this time whole arm also can be violent toward the direction bullet that rises once, the long more arm head that arm is stretched swings up and down big more.Particularly the bounce-back meeting of amplitude oil cylinder causes damage to amplitude oil cylinder, arm, turntable, supporting leg when full semi-girder lift heavy, can cause car load to tumble when serious, hangs serious safety problems such as object carrier falls.
The gravity arm that falls promptly leans on the own wt of arm to realize, overcome the fall deficiency of arm of first kind of pressure oil power, have the arm process steadily, the shake of no luffing, luffing rebounds, fine motion property is good advantage.System for hydraulic system of truck crane often adopts the own wt that leans on arm to realize the gravity arm that falls in when design, and the gravity arm that falls can actv. solves arm and falls that arm is opened and the impact when stopping, and the amplitude oil cylinder bounce-back can solve arm fully and fall arm the time.But when gravity fell arm, when arm did not hang object, the arm arm that falls was slow partially when perhaps returning the vehicle to the garage and knock off, the shortcoming that work efficiency is on the low side.
The utility model content
The purpose of the utility model is to provide a kind of gravity arm and the power car hosit arm of two kinds of patterns of arm arm hydraulic efficiency pressure system that falls that falls that falls that has, to overcome the single use gravity of car hosit the fall deficiency of arm of arm or single working power that falls.Simultaneously, the utility model also provides a kind of fall car hosit of arm hydraulic efficiency pressure system of this arm that has.
For this reason; One side according to the utility model; A kind of car hosit arm arm hydraulic efficiency pressure system that falls is provided; Comprise amplitude oil cylinder, with the rod chamber bonded assembly rod chamber oil circuit of amplitude oil cylinder, with amplitude oil cylinder fall arm chamber bonded assembly rodless cavity oil circuit and with rod chamber oil circuit and rodless cavity oil circuit bonded assembly first change-over valve, wherein, the rod chamber oil circuit is provided with by pass valve and optionally is connected with fuel tank or breaks off connection.
Further, the above-mentioned by pass valve and first change-over valve constitute a valve piece.
Further, the control mouth of above-mentioned by pass valve is connected to fuel tank, is provided with second change-over valve between control mouth and the fuel tank, and this by pass valve is preferably pilot overflow valve.
Further, also be provided with the 3rd change-over valve on the above-mentioned rod chamber oil circuit, rod chamber oil circuit pipeline is connected to fuel tank, and the connecting line between rod chamber oil circuit and the fuel tank is provided with the 4th change-over valve.
Further; Also be provided with the 5th change-over valve and first check valve of parallel connection on the above-mentioned rod chamber oil circuit, rod chamber oil circuit pipeline is connected to fuel tank, and the connecting line between rod chamber oil circuit and the fuel tank is provided with second check valve; Wherein, the non-return direction of second check valve and first check valve is opposite.
Further, above-mentioned the 5th change-over valve and first check valve constitute a valve piece.
According to the arm of the utility model arm hydraulic efficiency pressure system that falls; Have gravity arm and the power two kinds of patterns of arm that fall that fall, in arm falls the arm process, can select to fall accordingly the arm pattern according to the arm state; When hanging object, to adopt the gravity arm pattern that falls; When not hanging object or returning the vehicle to the garage and knock off, adopt the power arm pattern that falls, and then make full use of the advantage of two kinds of arm patterns that fall, increase work efficiency, reduce failsafety, increase safety performance.
Except top described purpose, characteristic and advantage, other purpose, characteristic and the advantage that the utlity model has are with combining accompanying drawing to do further detailed explanation.
Description of drawings
Constitute the preferred embodiment that the part of this specification sheets, the accompanying drawing that is used for further understanding the utility model show the utility model, and be used for explaining the principle of the utility model with specification sheets.Among the figure:
Fig. 1 shows the fall functional block diagram of first embodiment of arm hydraulic efficiency pressure system of car hosit arm according to the utility model;
Fig. 2 shows the fall working state figure of arm hydraulic efficiency pressure system of arm shown in Figure 1 arm when hanging object;
Fig. 3 shows the fall working state figure of arm hydraulic efficiency pressure system of arm shown in Figure 1 arm when not hanging object or returning the vehicle to the garage and knock off;
Fig. 4 shows according to the fall functional block diagram of second embodiment of arm hydraulic efficiency pressure system of the utility model car hosit arm; And
Fig. 5 shows according to the fall functional block diagram of the 3rd embodiment of arm hydraulic efficiency pressure system of the utility model car hosit arm.
The specific embodiment
Embodiment to the utility model is elaborated below in conjunction with accompanying drawing, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
Fig. 1 shows the fall functional block diagram of first embodiment of arm hydraulic efficiency pressure system of car hosit arm according to the utility model.As shown in Figure 1, arm fall the arm hydraulic efficiency pressure system comprise amplitude oil cylinder 11, with the rod chamber bonded assembly rod chamber oil circuit 13 of amplitude oil cylinder, with the arm chamber bonded assembly rodless cavity oil circuit 15 and carry out the change-over valve (first change-over valve) 17 of luffing of falling of amplitude oil cylinder 11 with rod chamber oil circuit 13 and rodless cavity oil circuit bonded assembly control amplitude oil cylinder.
Rod chamber oil circuit 13 is provided with by pass valve 19, and this by pass valve is preferably pilot overflow valve, preferably, constitutes a valve piece 20 with first change-over valve 17.
Wherein, the A hydraulic fluid port of valve piece 20 connects the rodless cavity oil circuit 15 of amplitude oil cylinder 11, and the B hydraulic fluid port connects the rod chamber oil circuit 13 of amplitude oil cylinder 11, and the P hydraulic fluid port is communicated with the oil pump (not shown), and T hydraulic fluid port (being oil return inlet T) is communicated with fuel tank.The W hydraulic fluid port is the Long-distance Control hydraulic fluid port of by pass valve 19.
The Long-distance Control mouth W of by pass valve 19 is connected to fuel tank (can certainly be oil return inlet T) through a connecting line; This connecting line is provided with the solenoid directional control valve (second electromagnetic valve) 21 of a bi-bit bi-pass, is connected or breaks off connection so that rod chamber oil circuit 13 is selected a ground through by pass valve 19 and fuel tank (not shown).
Below in conjunction with Fig. 2 and Fig. 3 the fall mode of operation of arm hydraulic efficiency pressure system of the arm of first embodiment is described.
As shown in Figure 2; When arm hangs object pressure oil from the P hydraulic fluid port to the B hydraulic fluid port; At pressure oil from the P hydraulic fluid port to being connected to a pilot overflow valve 19 the B hydraulic fluid port, this moment, the Long-distance Control mouth of pilot overflow valve took back hydraulic fluid port T through two-position two-way solenoid valve 21, it is very low almost nil when arm falls arm, to arrive the fall pressure of oil in arm chamber of amplitude oil cylinder so; This moment, the arm process that falls of arm was to lean on the own wt of arm to accomplish the arm action fully; Arm hangs and carries the arm unlatching, stops steadily can not exist the luffing shake, the luffing bounce-back.Guaranteed when hanging object, the fall super performance of arm of arm.
As shown in Figure 3; When hoisting crane in when work; Arm does not hang object or can give two-position two-way solenoid valve 21 energisings the time this moment of returning the vehicle to the garage and knock off, this moment pressure oil from the P hydraulic fluid port to the B hydraulic fluid port, at pressure oil from the P mouth to being connected to a pilot overflow valve 19 the B mouth; Because after two-position two-way solenoid valve 21 energisings Long-distance Control mouth W hydraulic fluid port of pilot overflow valve is closed; When arm falls arm, arriving the fall pressure of arm chamber oil of amplitude oil cylinder so is that the setting pressure of pilot overflow valve is a high pressure, and this moment, arm can realize that pressure oil power transfers, and can realize the fast speed arm that falls.Solved deadweight when transferring arm do not hang object or the arm that falls when returning the vehicle to the garage and knock off slow partially, the problem that work efficiency is lower.
So, the luffing hydraulic efficiency pressure system in the arm process that falls, in the arm process that falls that both can having realized conducts oneself with dignity transfers steadily, the shake of no luffing, luffing rebounds, fine motion property is good advantage.Can realize the pressure oil power arm system decline arm rapid speed that falls again, the work efficiency advantage of higher, thus remedied the deficiency of existing two kinds of technology.
Fig. 4 shows according to the fall functional block diagram of second embodiment of arm hydraulic efficiency pressure system of the utility model car hosit arm.As shown in Figure 4; Present embodiment is the modification of first embodiment; Be with the first embodiment difference; Rod chamber oil circuit 13 and fuel tank (not shown) are selected a ground and be connected or break off connecting in the following manner and realize: the rod chamber oil circuit not only is provided with by pass valve 19, also is provided with two-position two-way solenoid valve (the 3rd change-over valve) 23, and by pass valve 19 is preferred to constitute valve pieces with first change-over valve 17; Rod chamber oil circuit 13 pipelines are connected to the oil return inlet T of valve piece, and the connecting line 16 between rod chamber oil circuit and the oil return inlet T is provided with two-position two-way solenoid valve (the 4th change-over valve) 25.
When arm hangs object; Two-position two- way solenoid valve 23,25 no powers, it is very low almost nil when arm falls arm, to arrive the fall pressure of oil in arm chamber of amplitude oil cylinder so this moment, and this moment, the arm process that falls of arm was to lean on the own wt of arm to accomplish the arm action fully; Arm hangs and carries the arm unlatching; Stop steadily can not exist the luffing shake, the luffing bounce-back has guaranteed the super performance of arm when hanging object.
Arm does not hang object or when returning the vehicle to the garage and knock off; This moment, two-position two- way solenoid valve 23,25 all get electricly, and at this moment pressure oil is the setting pressure of by pass valve from the P hydraulic fluid port to B hydraulic fluid port pressure, is high pressure; This moment, arm can realize that pressure oil power transfers, and can realize the fast speed arm that falls.Solved deadweight when transferring arm do not hang object or the arm that falls when returning the vehicle to the garage and knock off slow partially, the problem that work efficiency is lower.
This second embodiment both can realize changing-breadth system fall in the arm process steadily, the shake of no luffing, luffing rebounds, fine motion property is good advantage.Can realize the dynamic arm system decline arm rapid speed that falls of pressure again, the work efficiency advantage of higher, thus remedied the deficiency of existing two kinds of technology.
Fig. 5 shows according to the fall functional block diagram of the 3rd embodiment of arm hydraulic efficiency pressure system of the utility model car hosit arm.As shown in Figure 5; Present embodiment is the modification of first embodiment; Be that with the first embodiment difference rod chamber oil circuit 13 and fuel tank (not shown) are selected a ground and be connected or break off connecting in the following manner and realize: not only be provided with by pass valve 19 on the rod chamber oil circuit, also be provided with a two-position two-way solenoid valve (the 5th change-over valve) 27 and first check valve 29 of parallel connection; By pass valve preferably constitutes a valve piece with first change-over valve 17; The 5th change-over valve 27 and first check valve, 29 preferred formation one valve pieces, rod chamber oil circuit pipeline is connected to the oil return inlet T of valve piece, and the connecting line 16 between rod chamber oil circuit and the oil return inlet T is provided with second check valve 31; Wherein, the non-return direction of second check valve 31 and first check valve 29 is opposite.
Second check valve 31 is used for when gravity falls arm from the fuel tank oil suction.First check valve 32 is used for when amplitude oil cylinder plays arm (opposite with the arm that falls), and the rod chamber oil return is to oil return inlet T.
When arm hangs object; Two-position two-way solenoid valve 27 must not electricity, and it is very low almost nil when arm falls arm, to arrive the fall pressure of oil in arm chamber of amplitude oil cylinder so this moment, and this moment, the arm process that falls of arm was to lean on the own wt of arm to accomplish the arm action fully; Arm hangs and carries the arm unlatching; Stop steadily can not exist the luffing shake, the luffing bounce-back has guaranteed the super performance of arm when hanging object.
When arm does not hang object or when returning the vehicle to the garage and knock off, two-position two-way solenoid valve 27 electric, this moment, pressure oil was that the setting pressure of by pass valve is a high pressure from the P hydraulic fluid port to B hydraulic fluid port pressure, this moment, arm can realize that pressure oil power transfers, and can realize the fast speed arm that falls.Solved deadweight when transferring arm do not hang object or the arm that falls when returning the vehicle to the garage and knock off slow partially, the problem that work efficiency is lower.
This 3rd embodiment also can realize changing-breadth system fall in the arm process steadily, the shake of no luffing, luffing rebounds, fine motion property is good advantage.Can realize the dynamic arm system decline arm rapid speed that falls of pressure again, the work efficiency advantage of higher, thus remedied the deficiency of existing two kinds of technology.
In the arm of the utility model falls the arm hydraulic efficiency pressure system; Be connected or break off connection through by pass valve being set on the rod chamber oil circuit and making rod chamber oil circuit and fuel tank select a ground; Power arm and the gravity two kinds of arm patterns that fall of arm that fall that fall have been realized; Wherein, by pass valve is used to limit the operation pressure of inflow pipeline, and rod chamber oil circuit and fuel tank are selected a ground and be connected or break off connecting and be used for inflow pipeline is carried out off-load.This arm arm hydraulic efficiency pressure system that falls is not limited to comparatively simple embodiment of above-mentioned three kinds of structures, also can be other comparatively complicated mode and way of realization.In addition, the utility model also provides a kind of gravity fall car hosit of two kinds of arm alternative modes that fall of arm of arm and power that falls that has.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (8)
1. arm arm hydraulic efficiency pressure system that falls; Comprise amplitude oil cylinder, with the rod chamber bonded assembly rod chamber oil circuit of said amplitude oil cylinder, with said amplitude oil cylinder fall arm chamber bonded assembly rodless cavity oil circuit and with said rod chamber oil circuit and rodless cavity oil circuit bonded assembly first change-over valve; It is characterized in that said rod chamber oil circuit is provided with by pass valve and said rod chamber oil circuit and optionally is connected with fuel tank or breaks off connection.
2. the arm according to claim 1 arm hydraulic efficiency pressure system that falls is characterized in that the said by pass valve and first change-over valve constitute a valve piece.
3. the arm according to claim 1 and 2 arm hydraulic efficiency pressure system that falls is characterized in that the control mouth of said by pass valve is connected to said fuel tank, is provided with second change-over valve between said control mouth and the said fuel tank.
4. the arm according to claim 3 arm hydraulic efficiency pressure system that falls is characterized in that said by pass valve is a pilot overflow valve.
5. the arm according to claim 1 and 2 arm hydraulic efficiency pressure system that falls; It is characterized in that; Also be provided with the 3rd change-over valve on the said rod chamber oil circuit, said rod chamber oil circuit pipeline is connected to said fuel tank, and the connecting line between said rod chamber oil circuit and the fuel tank is provided with the 4th change-over valve.
6. the arm according to claim 1 and 2 arm hydraulic efficiency pressure system that falls; It is characterized in that; Also be provided with the 5th change-over valve and first check valve of parallel connection on the said rod chamber oil circuit; Said rod chamber oil circuit pipeline is connected to said fuel tank, and the connecting line between said rod chamber oil circuit and the fuel tank is provided with second check valve.
7. the arm according to claim 6 arm hydraulic efficiency pressure system that falls is characterized in that said the 5th change-over valve and said first check valve constitute a valve piece.
8. a car hosit is characterized in that, comprises the arm according to claim 1 arm hydraulic efficiency pressure system that falls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202228476U CN202164063U (en) | 2011-06-28 | 2011-06-28 | Automobile crane and suspension arm falling hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202228476U CN202164063U (en) | 2011-06-28 | 2011-06-28 | Automobile crane and suspension arm falling hydraulic system |
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| Publication Number | Publication Date |
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| CN202164063U true CN202164063U (en) | 2012-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011202228476U Expired - Fee Related CN202164063U (en) | 2011-06-28 | 2011-06-28 | Automobile crane and suspension arm falling hydraulic system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701089A (en) * | 2012-06-08 | 2012-10-03 | 中联重科股份有限公司 | Arm falling safe control system for engineering machinery and hanging arm of engineering machinery |
| CN102874697A (en) * | 2012-10-18 | 2013-01-16 | 中联重科股份有限公司 | Hydraulic system for controlling amplitude variation of arm support and crane |
| CN102887447A (en) * | 2012-10-17 | 2013-01-23 | 中联重科股份有限公司 | Hydraulic control loop for amplitude-variable hydraulic cylinder, crane and amplitude-variable control method |
| CN103482502A (en) * | 2013-09-30 | 2014-01-01 | 徐州重型机械有限公司 | Crane and boom variable amplitude control system thereof |
| CN104528555A (en) * | 2014-12-19 | 2015-04-22 | 中联重科股份有限公司 | Main arm variable amplitude controlling system for crane and crane |
| CN104609321A (en) * | 2015-02-16 | 2015-05-13 | 徐州重型机械有限公司 | Crane boom luffing hydraulic control system, luffing device and crane |
| CN106801689A (en) * | 2016-12-23 | 2017-06-06 | 北汽福田汽车股份有限公司 | Mechanical handling formula crane and its variable amplitude hydraulic system |
-
2011
- 2011-06-28 CN CN2011202228476U patent/CN202164063U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701089A (en) * | 2012-06-08 | 2012-10-03 | 中联重科股份有限公司 | Arm falling safe control system for engineering machinery and hanging arm of engineering machinery |
| CN102701089B (en) * | 2012-06-08 | 2014-03-12 | 中联重科股份有限公司 | Arm falling safe control system for engineering machinery and hanging arm of engineering machinery |
| CN102887447A (en) * | 2012-10-17 | 2013-01-23 | 中联重科股份有限公司 | Hydraulic control loop for amplitude-variable hydraulic cylinder, crane and amplitude-variable control method |
| CN102887447B (en) * | 2012-10-17 | 2014-09-17 | 中联重科股份有限公司 | Hydraulic control loop for amplitude-variable hydraulic cylinder, crane and amplitude-variable control method |
| CN102874697B (en) * | 2012-10-18 | 2015-07-01 | 中联重科股份有限公司 | Hydraulic system for controlling amplitude variation of arm support and crane |
| CN102874697A (en) * | 2012-10-18 | 2013-01-16 | 中联重科股份有限公司 | Hydraulic system for controlling amplitude variation of arm support and crane |
| CN103482502B (en) * | 2013-09-30 | 2016-06-01 | 徐州重型机械有限公司 | A kind of lifting machine and boom variable amplitude control system thereof |
| CN103482502A (en) * | 2013-09-30 | 2014-01-01 | 徐州重型机械有限公司 | Crane and boom variable amplitude control system thereof |
| CN104528555A (en) * | 2014-12-19 | 2015-04-22 | 中联重科股份有限公司 | Main arm variable amplitude controlling system for crane and crane |
| CN104528555B (en) * | 2014-12-19 | 2017-03-22 | 中联重科股份有限公司 | Main arm variable amplitude controlling system for crane and crane |
| CN104609321A (en) * | 2015-02-16 | 2015-05-13 | 徐州重型机械有限公司 | Crane boom luffing hydraulic control system, luffing device and crane |
| CN106801689A (en) * | 2016-12-23 | 2017-06-06 | 北汽福田汽车股份有限公司 | Mechanical handling formula crane and its variable amplitude hydraulic system |
| CN106801689B (en) * | 2016-12-23 | 2018-11-20 | 北汽福田汽车股份有限公司 | Mechanical handling formula crane and its variable amplitude hydraulic system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 410013 Yuelu District, Hunan, silver basin Road, No. 361, No. Patentee after: ZOOMLION HEAVY INDUSTRY SCIENCE&TECHNOLOGY Co.,Ltd. Address before: 410013 Yuelu District, Hunan, silver basin Road, No. 361, No. Patentee before: CHANGSHA ZOOMLION HEAVY INDUSTRY SCIENCE AND TECHNOLOGY DEVELOPMENT Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120314 Termination date: 20160628 |
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| CF01 | Termination of patent right due to non-payment of annual fee |