CN202833367U - Mortar pump hydraulic system and mortar pump - Google Patents
Mortar pump hydraulic system and mortar pump Download PDFInfo
- Publication number
- CN202833367U CN202833367U CN 201220558844 CN201220558844U CN202833367U CN 202833367 U CN202833367 U CN 202833367U CN 201220558844 CN201220558844 CN 201220558844 CN 201220558844 U CN201220558844 U CN 201220558844U CN 202833367 U CN202833367 U CN 202833367U
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- oil
- pump
- control valve
- oil circuit
- mortar pump
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Abstract
The utility model discloses a mortar pump hydraulic system and a mortar pump. The mortar pump hydraulic system comprises a first oil pump (1), a magnetic exchange valve (2), a hydraulic cylinder (3), a first pressure sensor (4), a second pressure sensor (5) and a controller. An oil inlet of the first oil pump (1) is connected with an oil tank through oil circuits, an oil outlet of the first oil pump (1) is connected with the magnetic exchange valve (2) through the oil circuits, the magnetic exchange valve (2) is respectively connected with a rod cavity of the hydraulic cylinder (3), a rodless cavity of the hydraulic cylinder (3) and the oil tank through corresponding oil circuits, the magnetic exchange valve (2) is electrically connected with the controller, the first pressure sensor (4) is connected with the rod cavity of the hydraulic cylinder (3), the second pressure sensor (5) is connected with the rodless cavity of the hydraulic cylinder (3), and the first pressure sensor (4) and the second pressure sensor (5) are respectively connected with the controller in an electrical mode. According to the structure of the mortar pump hydraulic system, the mortar pump is enabled to continuously and stably spout and send sizing agents.
Description
Technical field
The utility model relates to field of mechanical technique, particularly relates to a kind of mortar pump hydraulic system and mortar pump.
Background technique
Mortar pump is used at work progress, pulp spraying is delivered to architectural, therefore, for different construction environments, for guarantee construction can be efficiently, carry out smoothly, require that mortar pump can continue, stable spray feed slurry.At present, usually adopt mechanically operated mode to drive mortar pump, with the spray feed slurry, but adopt the complicated in mechanical structure of the mortar pump that mechanically operated mode drives, component damage easily.
In the prior art, in order to address the above problem, adopt hydraulic single-cylinder system drive mortar pump.
But in the prior art, although use the hydraulic single-cylinder system to replace machine driven system, can simplify mechanical structure, the ability of the spray feed slurry that the hydraulic single-cylinder system is lasting, stable is relatively poor, and normal construction is exerted a certain influence.
The model utility content
For the defective that existing mortar pump exists, the utility model embodiment provides a kind of mortar pump hydraulic system and mortar pump, so that lasting, the stable spray feed slurry of mortar pump.
For solving above technical problem, the utility model provides a kind of mortar pump hydraulic system, comprises the first oil pump, solenoid directional control valve, hydraulic jack, the first pressure inductor, the second pressure inductor and controller, wherein:
The filler opening of the first oil pump is connected with fuel tank by oil circuit, and the oil outlet of the first oil pump is connected with solenoid directional control valve by oil circuit;
Solenoid directional control valve is connected with the rod chamber of hydraulic jack, rodless cavity and the fuel tank of hydraulic jack by corresponding oil circuit respectively, and solenoid directional control valve is electrically connected with described controller;
The first pressure inductor is connected with the rod chamber of hydraulic jack, and the second pressure inductor is connected with the rodless cavity of hydraulic jack, and the first pressure inductor is electrically connected with described controller respectively with the second pressure inductor.
Preferably, also be provided with electric proportional flow control valve between the first oil pump and the solenoid directional control valve, wherein:
The filler opening of electricity proportional flow control valve is connected by the oil outlet of oil circuit with the first oil pump, and the oil outlet of electric proportional flow control valve is connected with the solenoid directional control valve filler opening by oil circuit;
The electricity proportional flow control valve is electrically connected with described controller.
Preferably, with on the oil circuit that electric proportional flow control valve filler opening is connected also be provided with the first pressure gauge.
Preferably, also comprise the first relief valve, wherein, the filler opening of the first relief valve is connected by the oil outlet of oil circuit with the first oil pump, and the oil outlet of the first relief valve is connected with fuel tank by oil circuit.
Preferably, also comprise filter, wherein, the filler opening of filter is connected by the oil outlet of oil circuit with the first oil pump, and the oil outlet of filter is connected with the filler opening of electric proportional flow control valve by oil circuit.
Preferably, also comprise the second oil pump and stirring motor, wherein, the filler opening of stirring motor is connected by the oil outlet of oil circuit with the second oil pump, and the oil outlet of stirring motor is connected with fuel tank by oil circuit.
Preferably, also comprise ball valve, wherein:
The filler opening of ball valve is connected by the oil outlet of oil circuit with the second oil pump, and the oil outlet of ball valve is connected with the filler opening of stirring motor by oil circuit;
Ball valve is electrically connected with described controller.
Preferably, with on the oil circuit that the stirring motor filler opening is connected also be provided with the second pressure gauge.
Preferably, also comprise the second relief valve, wherein, the filler opening of the second relief valve is connected by the oil outlet of oil circuit with the second oil pump, and the oil outlet of the second relief valve is connected with fuel tank by oil circuit.
A kind of mortar pump comprises above-mentioned each described mortar pump hydraulic system.
Compared with prior art, a kind of mortar pump hydraulic system that the utility model provides, comprise the first oil pump, solenoid directional control valve, hydraulic jack, the first pressure inductor, the second pressure inductor and controller, wherein: the filler opening of the first oil pump is connected with fuel tank by oil circuit, and the oil outlet of the first oil pump is connected with solenoid directional control valve by oil circuit; Solenoid directional control valve is connected with the rod chamber of hydraulic jack, rodless cavity and the fuel tank of hydraulic jack by corresponding oil circuit respectively, and solenoid directional control valve is electrically connected with described controller; The first pressure inductor is connected with the rod chamber of hydraulic jack, and the second pressure inductor is connected with the rodless cavity of hydraulic jack, and the first pressure inductor is electrically connected with described controller respectively with the second pressure inductor.By this structure, can realize judging according to the pressure in the hydraulic jack whether the rod chamber of hydraulic jack or rodless cavity are full of by controller, thereby after the rod chamber of hydraulic jack or rodless cavity are full of, flow to by control electromagnetic switch valve regulation fluid, make the piston in the hydraulic jack in time change moving direction, with the conveying cylinder inner carrier motion of the drive mortar pump that links up, and then realize that mortar pump continues, spray feed slurry stably.
Description of drawings
The structural representation of the mortar pump hydraulic system that Fig. 1 provides for the utility model embodiment.
Marginal data:
1, the first oil pump 2, solenoid directional control valve 3, hydraulic jack
4, the first pressure inductor 5, the second pressure inductor 6, electric proportional flow control valve
7, the first pressure gauge 8, electric proportional flow control valve 9, filter
10, the second oil pump 11, stirring motor 12, ball valve
13, the second pressure gauge 14, the second relief valve 15, radiator
Embodiment
For specifying the technical solution of the utility model and effect, below in conjunction with specific embodiments and the drawings the utility model is done detailed description.
As shown in Figure 1, the structural representation of the mortar pump hydraulic system that provides for the utility model embodiment, comprise the first oil pump 1, solenoid directional control valve 2, hydraulic jack 3, the first pressure inductor 4, the second pressure inductor 5 and controller, wherein, the filler opening of the first oil pump 1 is connected with fuel tank by oil circuit, and the oil outlet of the first oil pump 1 is connected with solenoid directional control valve 2 by oil circuit; Solenoid directional control valve 2 is connected with the rod chamber of hydraulic jack 3, rodless cavity and the fuel tank of hydraulic jack 3 by corresponding oil circuit respectively, and solenoid directional control valve 2 is electrically connected with described controller; The first pressure inductor 4 is connected with the rod chamber of hydraulic jack 3, and the second pressure inductor 5 is connected with the rodless cavity of hydraulic jack 3, and the first pressure inductor 4 is electrically connected with described controller respectively with the second pressure inductor 5.
Concrete, at least be provided with 4 hydraulic fluid ports on the solenoid directional control valve 2, be respectively P mouth, T mouth, V mouth, B mouth, present embodiment with the P mouth be connected with the first oil pump 1, the T mouth is connected with fuel tank, the V mouth is connected with hydraulic jack 3 rod chambers, B mouth and hydraulic jack 3 rodless cavities are connected to example and describe.
The piston rod of hydraulic jack 3 is connected with the piston rod of carrying cylinder, when the mortar pump hydraulic system is started working, the P mouth is communicated with the V mouth, the T mouth is communicated with the B mouth, fluid is pumped by the first oil pump 1, via the P mouth of solenoid directional control valve 2, the rod chamber that the V mouth flows into hydraulic jack 3, promote the piston of hydraulic jack 3 to the rodless cavity motion of hydraulic jack 3, and then the piston rod movement of cylinder is carried in drive, so that carry the rod chamber of cylinder compressed, the space reduces, carry the rodless cavity space of cylinder to increase, thus the rod chamber feeding, the rodless cavity suction that realize carrying cylinder.When the rod chamber of hydraulic jack 3 is full of fluid, continuation is to the rod chamber pumping fluid of hydraulic jack 3, at this moment, pressure in the rod chamber of hydraulic jack 3 begins to increase, when the pressure in the first pressure inductor 4 that is connected with hydraulic jack 3 rod chambers by port connection detects the rod chamber of hydraulic jack 3 reaches threshold value, send the first pressure signal to controller, after controller receives the first pressure signal, the rod chamber of knowing hydraulic jack 3 is full of, controller sends commutation command to solenoid directional control valve 2, after solenoid directional control valve 2 is received commutation command, P mouth during with original state is communicated with the V mouth, the T mouth switches to the P mouth with the connection of B mouth and is connected with the B mouth, the T mouth is connected with the V mouth, at this moment, fluid is via the P mouth, the B mouth, pump into the rodless cavity of hydraulic jack 3, the fluid of the rod chamber of hydraulic jack 3 is then via the T mouth, the V mouth flows back to fuel tank, this moment hydraulic jack 3 piston by the rod chamber motion to hydraulic jack 3 of the rodless cavity of hydraulic jack 3, thereby promote the piston of hydraulic jack 3 to the rod chamber motion of hydraulic jack 3, and then the piston movement of cylinder is carried in promotion, so that carry the rodless cavity feeding of cylinder, the rod chamber suction of carrying cylinder.
When the pressure in the second pressure inductor 5 that is connected with the rodless cavity of hydraulic jack 3 by port connection detects the rodless cavity of hydraulic jack 3 reaches threshold value, send the second pressure signal to controller, after controller receives the second pressure signal, the rodless cavity of knowing hydraulic jack 3 is full of, controller sends commutation command to solenoid directional control valve 2, again the P mouth is communicated with the V mouth, the T mouth is communicated with the B mouth, repeats above-mentioned steps, until pumping finishes.
Preferably, among the utility model embodiment, can also be provided with electric proportional flow control valve 6 between the first oil pump 1 and the solenoid directional control valve 2, wherein, the filler opening of electricity proportional flow control valve 6 is connected by the oil outlet of oil circuit with the first oil pump 1, and the oil outlet of electric proportional flow control valve 6 is connected with solenoid directional control valve 2 filler openings by oil circuit; Electricity proportional flow control valve 6 is electrically connected with described controller.
Concrete, electric proportional flow control valve 6 can be two-way electricity proportional flow control valve, also can be for threeway electricity proportional flow control valve, and preferred, present embodiment adopts two energising proportional flow control valves, to save system cost.When the movement velocity of needs by regulator solution compressing cylinder 3, and then when regulating the material spray speed of mortar pump, controller changes the electric current of carrying to electric proportional flow control valve 6, thereby adjust the aperture of electric proportional flow control valve 6, flow into the flow of the fluid of hydraulic jack 3 in order to change, thereby adjust the movement velocity of hydraulic jack 3.The utility model embodiment can realize according to actual conditions by electric proportional flow control valve 6 is set between the first oil pump 1 and solenoid directional control valve 2, the movement velocity of level and smooth regulator solution compressing cylinder 3 inner carriers, thereby level and smooth adjusting mortar pump delivery.For example when need to be at the thinner slurry of architectural spraying, can reduce the aperture of electric proportional flow control valve 6, movement velocity with hydraulic jack 3 inner carriers that slow down, thereby reduce the mortar pump delivery, when need to be at the thicker slurry of architectural spraying, can increase the aperture of electric proportional flow control valve 6, with the movement velocity of quickening hydraulic jack 3 inner carriers, thereby improve the mortar pump delivery.
Preferably, can also be provided with the first pressure gauge 7 on the oil circuit that is connected with electric proportional flow control valve 6 filler openings among the utility model embodiment.Concrete, by the first pressure gauge 7 is set, the pressure in can Real Time Monitoring mortar pump hydraulic system, to avoid because overpressure causes mortar pump to damage.
Preferably, the utility model embodiment can also comprise the first relief valve 8, and wherein, the filler opening of the first relief valve 8 is connected by the oil outlet of oil circuit with the first oil pump 1, and the oil outlet of the first relief valve 8 is connected with fuel tank by oil circuit.
Concrete, be provided with the spring that regulates in advance pretightening force on the spool of the first relief valve 8, when the pressure of hydraulic system surpasses the pretightening force of spring, spool rises, valve port is opened, thereby the part fluid that the first oil pump 1 is pumped flows back to fuel tank, with the working pressure in the reduction mortar pump hydraulic system, thereby the mortar pump hydraulic system is worked in the pressure range of safety.
Preferably, the utility model embodiment can also comprise filter 9, and wherein, the filler opening of filter 9 is connected by the oil outlet of oil circuit with the first oil pump 1, and the oil outlet of filter 9 is connected by the filler opening of oil circuit with electric proportional flow control valve 6.
Concrete, by the oil outlet place at the first oil pump 1 filter 9 is set, can filter the impurity in the fluid that the first oil pump 1 pumps, cause electric proportional flow control valve 6 and solenoid directional control valve 2 wearing and tearing to avoid the impurity in the fluid, thereby prolong the working life of electric proportional flow control valve 6 and solenoid directional control valve 2.
Preferably, can also comprise the second oil pump 10 and stirring motor 11 among the utility model embodiment, wherein, the filler opening of stirring motor 11 is connected by the oil outlet of oil circuit with the second oil pump 10, and the oil outlet of stirring motor 11 is connected with fuel tank by oil circuit.By the second oil pump 10 and stirring motor 11 are set, can realize the stirring to slurry.
Preferably, the utility model embodiment can also comprise ball valve 12, and wherein, the filler opening of ball valve 12 is connected by the oil outlet of oil circuit with the second oil pump 10, and the oil outlet of ball valve 12 is connected by the filler opening of oil circuit with stirring motor 11; Ball valve 12 is electrically connected with described controller.
Concrete, when 11 work of needs stirring motor, controller sends the ball valve open command to ball valve 12, to open the valve in the ball valve 12, so that fluid can flow into stirring motor 11 by ball valve 12, when not needing stirring motor 11 work, controller sends the ball valve shutdown command to ball valve 12, to close the valve in the ball valve 12, so that fluid can't flow into stirring motor 11 by ball valve 12.
Preferably, also be provided with the second pressure gauge 13 on the oil circuit that is connected with stirring motor 11 filler openings among the utility model embodiment.Concrete, by the first pressure gauge 13 is set, the pressure in can Real Time Monitoring mortar pump hydraulic system, to avoid because overpressure causes mortar pump to damage.
Preferably, the utility model embodiment can also comprise the second relief valve 14, and wherein, the filler opening of the second relief valve 14 is connected by the oil outlet of oil circuit with the second oil pump 10, and the oil outlet of the second relief valve 14 is connected with fuel tank by oil circuit.
Concrete, be provided with the spring that pre-sets pretightening force on the spool of the second relief valve 14, when the pressure of hydraulic system surpasses the pretightening force of spring, spool rises, valve port is opened, thereby the part fluid that the second oil pump 10 is pumped flows back to fuel tank, with the working pressure in the reduction mortar pump hydraulic system, thereby the mortar pump hydraulic system is worked in the pressure range of safety
Preferably, the utility model embodiment can also comprise radiator 15, and wherein, the filler opening of radiator 15 is connected with 11 oil outlets of stirring motor by oil circuit, and the oil outlet of radiator 15 is connected with fuel tank by oil circuit.
Concrete, by at stirring motor 11 oil outlets radiator 15 being set, can reduce the temperature that flows back to the fluid of fuel tank via stirring motor 11, rotten, thinning to avoid the too high hydraulic oil that causes of hydraulic oil oil temperature, the problems such as grumeleuse of generation blocking device.
Among the utility model embodiment, the first oil pump 1 and the second oil pump 10 can be for being provided two independent oil pumps of power by two independent motors, also can be two oil pumps in the double-united oil pump that power is provided by a motor, for example duplex gear pump, duplex plunger pump.Solenoid directional control valve 2 can have at least for two-position four way change valve, three position four-way directional control valve, 3 position-5 way valve etc. the selector valve of four hydraulic fluid ports.The first pressure inductor 4 and the second pressure inductor 5 can be pressure switch, pressure transducer, approach switch etc.
A kind of mortar pump hydraulic system that the utility model provides, comprise the first oil pump, solenoid directional control valve, hydraulic jack, the first pressure inductor, the second pressure inductor and controller, wherein: the filler opening of the first oil pump is connected with fuel tank by oil circuit, and the oil outlet of the first oil pump is connected with solenoid directional control valve by oil circuit; Solenoid directional control valve is connected with the rod chamber of hydraulic jack, rodless cavity and the fuel tank of hydraulic jack by corresponding oil circuit respectively, and solenoid directional control valve is electrically connected with described controller; The first pressure inductor is connected with the rod chamber of hydraulic jack, and the second pressure inductor is connected with the rodless cavity of hydraulic jack, and the first pressure inductor is electrically connected with described controller respectively with the second pressure inductor.By this structure, can realize judging according to the pressure in the hydraulic jack whether the rod chamber of hydraulic jack or rodless cavity are full of by controller, thereby after the rod chamber of hydraulic jack or rodless cavity are full of, flow to by control electromagnetic switch valve regulation fluid, make the piston in the hydraulic jack in time change moving direction, with the conveying cylinder inner piston rod motion of the drive mortar pump that links up, and then realize that mortar pump continues, spray feed slurry stably.
The above only is preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be looked protection domain of the present utility model.
Claims (10)
1. a mortar pump hydraulic system is characterized in that, comprises the first oil pump (1), solenoid directional control valve (2), hydraulic jack (3), the first pressure inductor (4), the second pressure inductor (5) and controller, wherein:
The filler opening of the first oil pump (1) is connected with fuel tank by oil circuit, and the oil outlet of the first oil pump (1) is connected with solenoid directional control valve (2) by oil circuit;
Solenoid directional control valve (2) is connected with the rod chamber of hydraulic jack (3), rodless cavity and the fuel tank of hydraulic jack (3) by corresponding oil circuit respectively, and solenoid directional control valve (2) is electrically connected with described controller;
The first pressure inductor (4) is connected with the rod chamber of hydraulic jack (3), and the second pressure inductor (5) is connected with the rodless cavity of hydraulic jack (3), and the first pressure inductor (4) is electrically connected with described controller respectively with the second pressure inductor (5).
2. mortar pump hydraulic system as claimed in claim 1 is characterized in that, also is provided with electric proportional flow control valve (6) between the first oil pump (1) and the solenoid directional control valve (2), wherein:
The filler opening of electricity proportional flow control valve (6) is connected by the oil outlet of oil circuit with the first oil pump (1), and the oil outlet of electric proportional flow control valve (6) is connected with solenoid directional control valve (2) filler opening by oil circuit;
Electricity proportional flow control valve (6) is electrically connected with described controller.
3. mortar pump hydraulic system as claimed in claim 2 is characterized in that, and also is provided with the first pressure gauge (7) on the oil circuit that electric proportional flow control valve (6) filler opening is connected.
4. mortar pump hydraulic system as claimed in claim 2 is characterized in that, also comprises the first relief valve (8), wherein:
The filler opening of the first relief valve (8) is connected by the oil outlet of oil circuit with the first oil pump (1), and the oil outlet of the first relief valve (8) is connected with fuel tank by oil circuit.
5. mortar pump hydraulic system as claimed in claim 2, it is characterized in that, also comprise filter (9) wherein, the filler opening of filter (9) is connected by the oil outlet of oil circuit with the first oil pump (1), and the oil outlet of filter (9) is connected by the filler opening of oil circuit with electric proportional flow control valve (6).
6. mortar pump hydraulic system as claimed in claim 1, it is characterized in that, also comprise the second oil pump (10) and stirring motor (11), wherein, the filler opening of stirring motor (11) is connected by the oil outlet of oil circuit with the second oil pump (10), and the oil outlet of stirring motor (11) is connected with fuel tank by oil circuit.
7. mortar pump hydraulic system as claimed in claim 6 is characterized in that, also comprises ball valve (12), wherein:
The filler opening of ball valve (12) is connected by the oil outlet of oil circuit with the second oil pump (10), and the oil outlet of ball valve (12) is connected by the filler opening of oil circuit with stirring motor (11);
Ball valve (12) is electrically connected with described controller.
8. mortar pump hydraulic system as claimed in claim 6 is characterized in that, and also is provided with the second pressure gauge (13) on the oil circuit that stirring motor (11) filler opening is connected.
9. mortar pump hydraulic system as claimed in claim 6 is characterized in that, also comprises the second relief valve (14), wherein:
The filler opening of the second relief valve (14) is connected by the oil outlet of oil circuit with the second oil pump (10), and the oil outlet of the second relief valve (14) is connected with fuel tank by oil circuit.
10. a mortar pump is characterized in that, comprises such as each described mortar pump hydraulic system among the claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220558844 CN202833367U (en) | 2012-10-29 | 2012-10-29 | Mortar pump hydraulic system and mortar pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220558844 CN202833367U (en) | 2012-10-29 | 2012-10-29 | Mortar pump hydraulic system and mortar pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202833367U true CN202833367U (en) | 2013-03-27 |
Family
ID=47945082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220558844 Expired - Lifetime CN202833367U (en) | 2012-10-29 | 2012-10-29 | Mortar pump hydraulic system and mortar pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202833367U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832412A (en) * | 2014-12-19 | 2015-08-12 | 北汽福田汽车股份有限公司 | Pumping displacement control method, apparatus and system |
| CN112081784A (en) * | 2020-09-30 | 2020-12-15 | 高阳 | Piston-free hydraulic grouting pump unit |
| CN113217320A (en) * | 2021-05-12 | 2021-08-06 | 陈志昌 | Hydraulic-electric intelligent numerical control crankshaft wheel plunger pump |
| CN114633255A (en) * | 2022-03-03 | 2022-06-17 | 广东博智林机器人有限公司 | Mortar spraying and scraping control method and device, computer equipment and storage medium |
-
2012
- 2012-10-29 CN CN 201220558844 patent/CN202833367U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832412A (en) * | 2014-12-19 | 2015-08-12 | 北汽福田汽车股份有限公司 | Pumping displacement control method, apparatus and system |
| CN112081784A (en) * | 2020-09-30 | 2020-12-15 | 高阳 | Piston-free hydraulic grouting pump unit |
| CN113217320A (en) * | 2021-05-12 | 2021-08-06 | 陈志昌 | Hydraulic-electric intelligent numerical control crankshaft wheel plunger pump |
| CN114633255A (en) * | 2022-03-03 | 2022-06-17 | 广东博智林机器人有限公司 | Mortar spraying and scraping control method and device, computer equipment and storage medium |
| CN114633255B (en) * | 2022-03-03 | 2024-01-16 | 广东博智林机器人有限公司 | Mortar spraying and scraping control method and device, computer equipment and storage medium |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SANY AUTOMOBILE MANUFACTURING CO., LTD. Free format text: FORMER OWNER: SANYI HEAVY INDUSTRY CO LTD Effective date: 20130502 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130502 Address after: 410100 Changsha economic and Technological Development Zone, Hunan City, the 31 industrial city Patentee after: Sany Automobile Manufacturing Co.,Ltd. Address before: 410100 31 industrial city, Changsha economic and Technological Development Zone, Hunan, Changsha Patentee before: SANY HEAVY INDUSTRY Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20130327 |
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| CX01 | Expiry of patent term |