CN102145854B - Electric four-clack hydraulic grab bucket - Google Patents
Electric four-clack hydraulic grab bucket Download PDFInfo
- Publication number
- CN102145854B CN102145854B CN 201110089777 CN201110089777A CN102145854B CN 102145854 B CN102145854 B CN 102145854B CN 201110089777 CN201110089777 CN 201110089777 CN 201110089777 A CN201110089777 A CN 201110089777A CN 102145854 B CN102145854 B CN 102145854B
- Authority
- CN
- China
- Prior art keywords
- plug
- valve
- hydraulic
- oil
- hydraulic cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 12
- 210000000078 claw Anatomy 0.000 claims abstract description 6
- 230000008878 coupling Effects 0.000 claims abstract description 4
- 238000010168 coupling process Methods 0.000 claims abstract description 4
- 238000005859 coupling reaction Methods 0.000 claims abstract description 4
- 239000002828 fuel tank Substances 0.000 claims description 8
- 239000000725 suspension Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 5
- 206010037660 Pyrexia Diseases 0.000 description 4
- 230000001788 irregular Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The invention relates to an electric four-clack hydraulic grab bucket. The common electric hydraulic grab bucket is easy to cause the problems of leakage in a system and the unstable work. In the invention, a hanging ring and a disassembling buckle are connected through a pin shaft to form a hanging device of the grab bucket; the hanging device is a coupling piece of the grab bucket and a crane; a frame is arranged below the hanging device; one end of a hydraulic cylinder is fixed with the upper part of the frame through a pin shaft, and the other end of the hydraulic cylinder is fixed with claw clacks through pin shafts; the claw clacks are driven and controlled to operate through extension and retraction of the hydraulic cylinder so as to complete grabbing and putting down materials; the claw clacks are connected with the lower part of the frame through pin shafts; and an electric motor, a bidirectional hydraulic pump and a control valve block are arranged inside the frame to form a hydraulic control unit of the electric four-clack hydraulic grab bucket. In the invention, unloading pressure maintenance of the whole loop is realized by utilizing a cartridge type overflow valve; the problem of generating excessive heat of the hydraulic system is solved; and the hydraulic impact of the system is reduced due to the adoption of a cartridge type one-way valve so as to reduce the pulse influence of liquid.
Description
Technical field
The invention belongs to the Hoisting Machinery technical field, relate to a kind of electronic pintongs hydraulic grab of self-powered device.
Background technique
Common electric hydraulic bucket pumping station system is controlled to be the pump control, is comprised of motor, metering pump, control valve, relief valve, oil pipe, oil cylinder etc.Two problems of main appearance: the one, metering pump output is invariable power in the grab bucket, and according to law of conservation of energy, kinetic energy has become heat energy, oil temperature raises, and has become very large noise.Even the grab bucket that has production because the oil temperature rising has to stop, allow the grab bucket oil temperature fall.Metering pump grab bucket oil temperature raises and can produce serious consequence, accelerate Sealing and oil pipe aging, oil viscosity descends simultaneously, system's internal leakage increases, job insecurity, such as pressurize most likely, the goods that grasps can come off.The 2nd, Constant Pump System is when starting, and valve piece inner spool has certain response time, therefore starts instantaneous pressure very high, sometimes even surpass the bursting pressure of oil pipe, and the clockwise and anticlockwise control of motor is adopted in the switching of grab bucket, and so frequent generation instantaneous pressure easily causes the phenomenons such as booster.It is more complicated than carrying out common electric hydaulic machinery to carry out electric hydraulic bucket, with high content of technology, because the shape of material is (pig iron, steel scrap, ore, the rubbish) that changes, and the proportion of material changes, the position of grabbing goods changes, and operator's technical quality changes.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of electronic pintongs hydraulic grab is provided, this grab bucket can be widely used in the occasion operations such as harbour, steel mill, incineration treatment of garbage factory, can cooperate all types of hoists such as tower crane, ship unloaders and driving.
The present invention includes suspension ring, shackle, frame, oil hydraulic cylinder, motor, the bidirectional hydraulic pump, pawl lobe and control valve piece, suspension ring and shackle connect to form the erecting by overhang of grab bucket by bearing pin, and erecting by overhang is the coupling of grab bucket with hoist; Erecting by overhang below is provided with frame, an end of oil hydraulic cylinder by the top of bearing pin and frame fix, the other end fixes by bearing pin and pawl lobe, the telescopic drive of oil hydraulic cylinder and control claw lobe move, and finish crawl and let-down to material; Described pawl lobe is connected with the bottom of frame by bearing pin, and the pawl lobe is centrosymmetric centered by frame;
Described motor, bidirectional hydraulic pump and control valve piece are arranged on frame inside, consist of the hydraulic control unit of electronic pintongs hydraulic grab;
Described hydraulic control unit also comprises the first plug-in type directional control valve RV1, the second plug-in type directional control valve RV2, the first Pilot operated check valve RV3, the second Pilot operated check valve RV4, the first plug-in overflow valve DV1, the second plug-in overflow valve DV2, the first plug-in one-way valve SV1, the second plug-in one-way valve SV2, oil purifier F;
The input end of the first Pilot operated check valve RV3 connects fuel tank, the output terminal of the first Pilot operated check valve RV3 respectively with the input end of the input end of an end of bidirectional hydraulic pump, the first plug-in overflow valve DV1, the second plug-in type directional control valve RV2 be connected the control end of plug-in one-way valve SV2 and be connected, the output terminal of the second plug-in type directional control valve RV2 links to each other with the input end of the first plug-in one-way valve SV1, the rodless cavity of oil hydraulic cylinder;
The input end of the second Pilot operated check valve RV4 connects fuel tank, the output terminal of the second Pilot operated check valve RV4 respectively with the input end of the input end of the other end of bidirectional hydraulic pump, the second plug-in overflow valve DV2, the first plug-in type directional control valve RV1 be connected the control end of plug-in one-way valve SV1 and be connected, the output terminal of the first plug-in type directional control valve RV1 links to each other with the input end of the second plug-in one-way valve SV2, the rod chamber of oil hydraulic cylinder;
The output terminal of the output terminal of the output terminal of the output terminal of the first plug-in overflow valve DV1, the second plug-in overflow valve DV2, the first plug-in one-way valve SV1, the second plug-in one-way valve SV2 all is connected with the input end of oil purifier F, and the output terminal of oil purifier F connects fuel tank;
Described bidirectional hydraulic pump is by motoring, described the first plug-in type directional control valve RV1, the second plug-in type directional control valve RV2, the first plug-in overflow valve DV1, the second plug-in overflow valve DV2, the first plug-in one-way valve SV1, the second plug-in one-way valve SV2 consist of the control valve piece.
The present invention has used plug-in overflow valve to realize the off-load pressurize in whole loop, solved the too much problem of Hydraulic System Fever, used simultaneously plug-in one-way valve that the hydraulic shock of system is reduced, thereby reduced the pulsation impact of liquid, also avoid the generation of instantaneous high pressure in the hydraulic system, guaranteed stationarity and the validity of hydraulic grab work, also further prolonged the working life of workpiece, and the cartridge valve cost is low, is convenient to maintenance.
Description of drawings
Fig. 1 is mechanical structure schematic diagram of the present invention;
Fig. 2 is hydraulic principle figure of the present invention.
Embodiment
Below by drawings and Examples, technological scheme of the present invention is described in further detail.
As shown in Figure 1, electronic pintongs hydraulic grab is mainly by suspension ring 1, shackle 2, and frame 3, oil hydraulic cylinder 4, motor 5, bidirectional hydraulic pump 6, pawl lobe 7 and control valve piece 8 form.Suspension ring 1 and shackle 2 connect to form the erecting by overhang of grab bucket by bearing pin, erecting by overhang is the coupling of this grab bucket with hoist.Frame 3 is basic parts of this grab bucket, and various equipments all are connected and fixed with frame 3.Pawl lobe 7 is workpieces, and total pintongs becomes Central Symmetry to distribute centered by frame.Pawl lobe 7 contacts an end is fixed on frame 3 with bearing pin bottom with the material of crawl, be fixed together with bearing pin and oil hydraulic cylinder 4 in addition, by motor 5 make bidirectional hydraulic pump 6 drive oil hydraulic cylinders 4 stretch drive and the work of control claw lobe 7, finish crawl and let-down to material.The other end and the upper rack of oil hydraulic cylinder 4 are fixed together by bearing pin, become the immovable point of oil hydraulic cylinder 4.
Fig. 2 is the hydraulic principle figure of this electronic pintongs hydraulic grab.Number in the figure is expressed as respectively: motor M, bidirectional hydraulic pump P, the first plug-in type directional control valve RV1, the second plug-in type directional control valve RV2, the first Pilot operated check valve RV3, the second Pilot operated check valve RV4, the first plug-in overflow valve DV1, the second plug-in overflow valve DV2, the first plug-in one-way valve SV1, the second plug-in one-way valve SV2, oil purifier F, the rodless cavity 4-1 of oil hydraulic cylinder 4, the rod chamber 4-2 of oil hydraulic cylinder 4.The rod chamber 4-2 of oil hydraulic cylinder 4 links to each other with oil pipe B, the rodless cavity 4-1 of oil hydraulic cylinder 4 links to each other with oil pipe A, oil inlet pipe when P1 is the motor forward, oil inlet pipe when P2 is motor reversal, oil pipe C connects oil inlet pipe P1 and the second plug-in one-way valve SV2, oil pipe D connects oil inlet pipe P2 and the first plug-in one-way valve SV1, R is return tube, return tube R links to each other with oil purifier F, control valve piece 8 is by the first plug-in overflow valve DV1, the second plug-in overflow valve DV2, the first plug-in one-way valve SV1, the second plug-in one-way valve SV2, the first plug-in type directional control valve RV1, the second plug-in type directional control valve RV2, oil pipe C, D forms jointly, and whole grab mechanisms is played control action.
When control motor M forward, bidirectional hydraulic pump P is from the second Pilot operated check valve RV4 one side draught oil., by oil inlet pipe P1 to control valve piece 8 interior fuel feeding.This moment, most of fluid entered in the oil pipe A by the second plug-in type directional control valve RV2, entered the rodless cavity 4-1 of oil hydraulic cylinder 4 by oil pipe A.Another part fluid of oil inlet pipe P1 is that the throttle valve of 1mm enters in the rodless cavity of the oil hydraulic cylinder among the second plug-in one-way valve SV2 by diameter, fluid is full of the hydraulic lever-free chamber of the second plug-in one-way valve SV2, when reaching certain pressure, piston in the oil hydraulic cylinder promotes the second cartridge valve SV2 and opens, connect oil hydraulic cylinder 4 rod chamber 4-2 and oil pipe B, make the fluid of oil hydraulic cylinder 4 rod chamber 4-2 enter return tube R by the second plug-in one-way valve SV2, enter fuel tank through oil purifier F again.Thereby make piston rod overhanging of oil hydraulic cylinder 4, driven the motion of pawl lobe, realized the closure of grab bucket.Maximum pressure when grab bucket is closed is determined by the first plug-in overflow valve DV1, when the pressure at oil inlet pipe P1 place reaches the cracking pressure of the first plug-in overflow valve DV1, relief valve is opened, produce overflow, and when the pressure among the oil pipe A reaches setting value, the first plug-in overflow valve DV1 makes the pump off-load, thereby guarantees that the pressure in the loop remains in the lower value, has reduced Hydraulic System Fever.Simultaneously when grab bucket crawl material, when the material geometrical shape is irregular, because acting on the resistance difference on the pawl lobe, cause the oil liquid pressure of oil hydraulic cylinder 4 rod chamber 4-2 different, because the second plug-in one-way valve SV2 links to each other with the rod chamber 4-2 of oil hydraulic cylinder 4, when the rod chamber 4-2 of oil hydraulic cylinder 4 pressure not simultaneously, oil hydraulic cylinder by the second plug-in one-way valve SV2 is regulated, because having certain stroke, oil hydraulic cylinder changes, so can carry out buffer function to each different oil liquid pressures, prevent the violent hydraulic shock that the sudden change of resistance causes, smoothness and the accuracy of device work in the assurance.
When control motor M counter-rotating, bidirectional hydraulic pump P is from the first Pilot operated check valve RV3 one side draught oil, by oil inlet pipe P2 to control valve piece 8 interior fuel feeding.This moment, major part entered in the oil pipe B by the first plug-in type directional control valve RV1, entered by oil pipe B among the rod chamber 4-2 of oil hydraulic cylinder 4.Same principle, fluid enters among the first plug-in one-way valve SV1 in the oil hydraulic cylinder, the first cartridge valve SV1 is opened, make the fluid of the rodless cavity 4-1 of oil hydraulic cylinder 4 enter return tube R through oil pipe A by the first cartridge valve SV1, F enters fuel tank by oil purifier.Thereby make the piston rod retraction of oil hydraulic cylinder 4, driven the motion of pawl lobe, realized opening of grab bucket.Maximum pressure when grab bucket is opened is determined by the second plug-in overflow valve DV2, when the pressure at oil inlet pipe P2 place reaches the cracking pressure of the second plug-in overflow valve DV2, relief valve is opened, produce overflow, and when the pressure among the oil pipe B reaches setting value, the second plug-in overflow valve DV2 makes the pump off-load, thereby also can make the pressure in the loop remain on a lower scope, has reduced Hydraulic System Fever.
Electronic pintongs hydraulic grab working principle: when plugged, motor 5 is started working, and oil enters the control valve piece 8 of hydraulic system through one-way valve, arrives oil hydraulic cylinder 6 again.By the regulating action of control valve piece 8, make oil hydraulic cylinder 6 both sides produce oil pressure poor, make fore and aft motion thereby promote oil hydraulic cylinder.Because it is rigidly connected that oil hydraulic cylinder and corpus unguis pass through hinge, therefore the fore and aft motion of oil hydraulic cylinder can directly guide corpus unguis to finish opens, closure and grasping movement.When corpus unguis opens or sky when grabbing, oil hydraulic cylinder is retracted or is stretched out, and oil hydraulic cylinder only need overcome the frictional force of self friction power and each hinged place of mechanism, and system demand pressure is lower.When corpus unguis is clamped weight, system pressure rises gradually, pressure surpasses certain value, after being higher than the regulation and control force value of plug-in overflow valve, a plug-in overflow valve is opened, and makes the pump off-load, thereby can make the pressure in the loop remain on a lower scope, reach the effect of pressurize, reduced Hydraulic System Fever.Because there is irreqularity in crawled material shapes, when the grab bucket crawl, act on simultaneously the power skewness on each pawl lobe, easily cause the infringement of hydraulic system.This hydraulic control system adopts plug-in one-way valve, utilizes built-in oil hydraulic cylinder, can play to the nonuniformity of resistance good mitigation.When material was irregular, the resistance that acts on each pawl lobe was different.Because the buffer function of the oil hydraulic cylinder in the plug-in one-way valve has reduced because of the closed difficulty of the different pawl lobes that cause of resistance on each pawl lobe, prevents from producing violent hydraulic shock because of closed, has avoided the misoperation of device.The buffer function of this corpus unguis closure is very favorable to the smooth crawl of irregular material to the protection of hydraulic system and the use of whole grab bucket.
Claims (1)
1. electronic pintongs hydraulic grab comprises suspension ring, shackle, frame, oil hydraulic cylinder, motor, bidirectional hydraulic pump, pawl lobe and control valve piece is characterized in that: suspension ring and shackle connect to form the erecting by overhang of grab bucket by bearing pin, and erecting by overhang is the coupling of grab bucket with hoist; Erecting by overhang below is provided with frame, an end of oil hydraulic cylinder by the top of bearing pin and frame fix, the other end fixes by bearing pin and pawl lobe, the telescopic drive of oil hydraulic cylinder and control claw lobe move, and finish crawl and let-down to material; Described pawl lobe is connected with the bottom of frame by bearing pin, and the pawl lobe is centrosymmetric centered by frame;
Described motor, bidirectional hydraulic pump and control valve piece are arranged on frame inside, consist of the hydraulic control unit of electronic pintongs hydraulic grab;
Described hydraulic control unit also comprises the first plug-in type directional control valve RV1, the second plug-in type directional control valve RV2, the first Pilot operated check valve RV3, the second Pilot operated check valve RV4, the first plug-in overflow valve DV1, the second plug-in overflow valve DV2, the first plug-in one-way valve SV1, the second plug-in one-way valve SV2, oil purifier F;
The input end of the first Pilot operated check valve RV3 connects fuel tank, the output terminal of the first Pilot operated check valve RV3 respectively with the input end of the input end of an end of bidirectional hydraulic pump, the first plug-in overflow valve DV1, the second plug-in type directional control valve RV2 be connected the control end of plug-in one-way valve SV2 and be connected, the output terminal of the second plug-in type directional control valve RV2 links to each other with the input end of the first plug-in one-way valve SV1, the rodless cavity of oil hydraulic cylinder;
The input end of the second Pilot operated check valve RV4 connects fuel tank, the output terminal of the second Pilot operated check valve RV4 respectively with the input end of the input end of the other end of bidirectional hydraulic pump, the second plug-in overflow valve DV2, the first plug-in type directional control valve RV1 be connected the control end of plug-in one-way valve SV1 and be connected, the output terminal of the first plug-in type directional control valve RV1 links to each other with the input end of the second plug-in one-way valve SV2, the rod chamber of oil hydraulic cylinder;
The output terminal of the output terminal of the output terminal of the output terminal of the first plug-in overflow valve DV1, the second plug-in overflow valve DV2, the first plug-in one-way valve SV1, the second plug-in one-way valve SV2 all is connected with the input end of oil purifier F, and the output terminal of oil purifier F connects fuel tank;
Described bidirectional hydraulic pump is by motoring, described the first plug-in type directional control valve RV1, the second plug-in type directional control valve RV2, the first plug-in overflow valve DV1, the second plug-in overflow valve DV2, the first plug-in one-way valve SV1, the second plug-in one-way valve SV2 consist of the control valve piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110089777 CN102145854B (en) | 2011-04-11 | 2011-04-11 | Electric four-clack hydraulic grab bucket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110089777 CN102145854B (en) | 2011-04-11 | 2011-04-11 | Electric four-clack hydraulic grab bucket |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102145854A CN102145854A (en) | 2011-08-10 |
| CN102145854B true CN102145854B (en) | 2013-01-23 |
Family
ID=44420355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110089777 Expired - Fee Related CN102145854B (en) | 2011-04-11 | 2011-04-11 | Electric four-clack hydraulic grab bucket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102145854B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201495029U (en) * | 2009-09-14 | 2010-06-02 | 上海昂丰矿机科技有限公司 | Electric hydraulic grab bucket with delayed unloading function |
| CN201678367U (en) * | 2010-04-13 | 2010-12-22 | 上海昂丰矿机科技有限公司 | Electric power hydraulic grab bucket with control structure of electromagnetic cartridge valve |
| CN201980859U (en) * | 2011-04-11 | 2011-09-21 | 杭州电子科技大学 | Electric four-leaf hydraulic grab bucket |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3937392B2 (en) * | 2001-11-15 | 2007-06-27 | 東部重工業株式会社 | Hydraulic control cylinder for single rope type grab bucket |
-
2011
- 2011-04-11 CN CN 201110089777 patent/CN102145854B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201495029U (en) * | 2009-09-14 | 2010-06-02 | 上海昂丰矿机科技有限公司 | Electric hydraulic grab bucket with delayed unloading function |
| CN201678367U (en) * | 2010-04-13 | 2010-12-22 | 上海昂丰矿机科技有限公司 | Electric power hydraulic grab bucket with control structure of electromagnetic cartridge valve |
| CN201980859U (en) * | 2011-04-11 | 2011-09-21 | 杭州电子科技大学 | Electric four-leaf hydraulic grab bucket |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2003-148417A 2003.05.21 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102145854A (en) | 2011-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201980859U (en) | Electric four-leaf hydraulic grab bucket | |
| CN109139583B (en) | Hydraulic control system for forklift | |
| CN206872378U (en) | A kind of aerial work platform hydraulic energy-saving system with no-load protection | |
| CN100520982C (en) | Waterpower driving mechanism for reactor safety rod | |
| CN206668636U (en) | A kind of positive displacement heave compensation hydraulic system and heave compensation Lift-on/Lift-off System | |
| CN102259793A (en) | Electric six-blade hydraulic grab bucket | |
| CN203655739U (en) | Draw arm type self-loading and unloading device and carriage detachable garbage truck with same | |
| CN103867524B (en) | A kind of double-action two-stage hydraulic cylinder | |
| CN204173803U (en) | Double-piston energy storage wave compensation system | |
| CN102145854B (en) | Electric four-clack hydraulic grab bucket | |
| CN202970633U (en) | Full-automatic hydraulic pumping unit | |
| CN108468672B (en) | Energy-saving hydraulic system of stepping heating furnace | |
| CN106122135A (en) | The hydraulic control system of scrap bundler | |
| CN102616700A (en) | Oil and air hybrid driven lifting control device | |
| CN204628110U (en) | A kind of car lift deceleration pressure dwelling loop | |
| CN201412400Y (en) | Hydraulic control device of turnover mechanism and turnover mechanism | |
| CN105545832B (en) | A kind of movable gas hood lifting hydraulic control system and method | |
| CN201825606U (en) | Power pumping station for hydraulic elevator/hydraulic lift | |
| CN103979388A (en) | Room-free pit-free barrier-free elevator | |
| CN204661231U (en) | The lifting machine of four-column type band secondary lifting | |
| CN201103577Y (en) | Simple liquid-controlled device | |
| CN203959756U (en) | The forklift gantry pipeline system of a kind of pair of governor valve | |
| CN203926176U (en) | Integrated hydraulic hoists | |
| CN103047406A (en) | Pumping equipment and automatic transmission control method thereof | |
| CN203570719U (en) | Gate type bucket-wheel stacker-reclaimer walking beam lifting mechanism with energy-saving control function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HAIAN SERVICE CENTER FOR TRANSFORMATION OF SCIENTI Free format text: FORMER OWNER: HANGZHOU ELECTRONIC SCIENCE AND TECHNOLOGY UNIV Effective date: 20131031 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 310018 HANGZHOU, ZHEJIANG PROVINCE TO: 226600 NANTONG, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20131031 Address after: 226600 No. 106 middle Yangtze Road, Haian County, Nantong, Jiangsu Patentee after: SERVICE CENTER OF COMMERCIALIZATION OF RESEARCH FINDINGS, HAIAN COUNTY Address before: Hangzhou City, Zhejiang province 310018 Xiasha Higher Education Park No. 2 street Patentee before: HANGZHOU DIANZI University |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20110810 Assignee: JIANGSU ZHONGHAI HEAVY MACHINE Co.,Ltd. Assignor: SERVICE CENTER OF COMMERCIALIZATION OF RESEARCH FINDINGS, HAIAN COUNTY Contract record no.: 2014320000440 Denomination of invention: Electric four-clack hydraulic grab bucket Granted publication date: 20130123 License type: Exclusive License Record date: 20140521 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |