CN102734245B - Preferential-type variable steering control valve - Google Patents
Preferential-type variable steering control valve Download PDFInfo
- Publication number
- CN102734245B CN102734245B CN201210232636.XA CN201210232636A CN102734245B CN 102734245 B CN102734245 B CN 102734245B CN 201210232636 A CN201210232636 A CN 201210232636A CN 102734245 B CN102734245 B CN 102734245B
- Authority
- CN
- China
- Prior art keywords
- oil duct
- valve
- spool
- steering
- mouth
- 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.)
- Active
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
- Servomotors (AREA)
- Power Steering Mechanism (AREA)
Abstract
The invention relates to a preferential-type variable steering control valve, belonging to the technical field of hydraulic steering systems of engineering machinery; the preferential-type variable steering control valve comprises a valve body, a small end cover arranged on the valve body and the like, wherein a preferential valve core hole is provided with an oil channel L1 and the like; an amplifying valve core hole is provided with an oil channel a2 and the like; a selecting valve core, a diverter control port a joint and a diverter control port b joint are arranged in a large end cover; an oil channel A is provided with a steering A port overloading valve; and a steering A port one-way vale and a steering B port one-way valve are arranged between the oil channel A and the oil channel a2, and between an oil channel B and an oil channel b2. According to the invention, the preferential-type variable steering control valve, a small-emission load sensing diverter and a variable pump compose a pump-controlled load sensing variable steering hydraulic system which can be used for a double-variable converging system so as to select large pressure signals of the diverter or a multipath valve to be acted on the variable pump, thereby providing necessary flow and pressure needed by the system, solving an effciency best matching problem of the steering hydraulic system of a loader under any working condition, reducing unnecessary energy loss of the system, and achieving effect of energy saving.
Description
Technical field
The invention belongs to the hydraulic steering system technical field of engineering machinery, the type of priority variable being specifically related to a kind of pump control Load Sensing Steering Hydraulic System turns control valve.
Background technique
Domestic current engineering machinery is as loader, the development experience of its hydraulic steering system servo steering system, load sensing all hydraulic pressure steering-gear, Steering system with flow amplification, although through improving several times, energy-saving effect is more and more obvious, but what generally adopt is quantitative system, because steering pump is metering pump, discharge capacity is immutable, and loader work working conditions change is comparatively large, the unnecessary flow of steering pump certainly exists high pressure or low pressure spill, there is larger energy loss.And adopting variable system on a small quantity, it is the hydraulic element adopting external import substantially, the cost of loader is improved.Pump control Load Sensing Steering Hydraulic System because of its superior energy-saving effect application on loader be development trend, also be the domestic demand place to the modern project such as the loader machinery green revolution at present, but domestic at present also do not have more energy-conservation, to be applied to pump control Load Sensing Steering Hydraulic System more reliably variable to turn control valve, and especially type of priority variable turns control valve.
Summary of the invention
For the above-mentioned problems in the prior art, a kind of type of priority variable of pump control Load Sensing Steering Hydraulic System is the object of the present invention is to provide to turn control valve.
Described a kind of type of priority variable turns control valve, comprise valve body, be arranged on the small end cover on valve body, amplify spool, priority spool, Ls controls mouth plug screw and large end cap, described pressure-gradient control valve core bore is provided with oil duct L1, oil duct EF, oil duct P, oil duct P1 and oil duct L2, described amplifying valve core bore is provided with oil duct a2, back oil road T1, oil duct A, oil duct P1, oil duct B, back oil road T2 and oil duct b2, it is characterized in that described Ls controls mouth plug screw arranges orifice plug I, described priority spool two ends are equipped with orifice plug II and orifice plug III respectively, in described large end cap, selection spool is set, commutator controls mouth a joint, commutator controls mouth b joint, on described oil duct A, setting turns to A mouth overload valve, arrange between oil duct A and oil duct a2 and turn to A mouth one-way valve, arrange between oil duct B and oil duct b2 and turn to B mouth one-way valve, on oil duct B, setting turns to B mouth overload valve, oil duct L1 is arranged Ls safety valve.
Described a kind of type of priority variable turns control valve, it is characterized in that described selector valve core bore arranges hydraulic fluid port a, oil duct a1, oil duct a4, oil duct b4, oil duct b, hydraulic fluid port b, and oil duct a4 communicates with oil duct a2, and oil duct b2 communicates with oil duct b4.
Described a kind of type of priority variable turns control valve, and it is characterized in that described commutator controls mouth a joint and is arranged between hydraulic fluid port a and oil duct a1, control port a is communicated with oil duct a1, oil duct a3.
Described a kind of type of priority variable turns control valve, and it is characterized in that described commutator controls mouth b joint and is arranged between hydraulic fluid port b and oil duct b1, control port b is communicated with oil duct b1, oil duct b3.
Described a kind of type of priority variable turns control valve, it is characterized in that described oil duct EF is connected with work system multi-way valve filler opening.
Described a kind of type of priority variable turns control valve, it is characterized in that described oil duct P1 is connected with amplifying valve core bore.
Described a kind of type of priority variable turns control valve, and it is characterized in that described oil duct P is steering pump filler opening oil duct, described oil duct A, oil duct B are and turn to a mouthful oil duct, described oil duct P1 filler opening oil duct.
The type of priority variable that the present invention is obtained by the above-mentioned technology of employing turns control valve, its structure is simple, compact, with the commutator of small displacement load sensing, variable displacement pump forms pump control load sensing variable steering hydraulic system together, bivariate converging system can be directly used in, select from the large pressure signal of both the commutator of small displacement load sensing or multi-way valve by shuttle valve, and act on variable displacement pump, pump is made to do corresponding adjustment to output flow, the flow of system requirements necessity is provided, solve the efficiency optimum matching problem of the steering hydraulic system of loader under any operating mode, reduce the unnecessary energy loss of system to greatest extent, reduce oil temperature, effectively play energy-conserving action.
Accompanying drawing explanation
Fig. 1 is plan view structural representation of the present invention;
Fig. 2 is that the vertical of Fig. 1 looks sectional view structural representation;
Fig. 3 is the A-A sectional view structural representation of Fig. 2;
Fig. 4 is the B-B sectional view structural representation of Fig. 3;
Fig. 5 is the C-C sectional view structural representation of Fig. 3;
Fig. 6 is hydraulic system principle figure of the present invention.
In figure: 1-valve body, 2-small end cover, 3-amplifies spool, 4-priority spool, 5-Ls controls mouth plug screw, 6-orifice plug I, 7-orifice plug II, 8-orifice plug III, the large end cap of 9-, 10-turns to A mouth one-way valve, and 11-turns to B mouth one-way valve, 12-selects spool, 13-commutator controls mouth a joint, and 14-commutator controls mouth b joint, and 15-turns to A mouth overload valve, 16-turns to B mouth overload valve, 17-Ls safety valve, 18-type of priority variable turns control valve, the commutator of 19-small displacement load sensing, 20-variable displacement pump, 21-multi-way valve.
Embodiment
Below in conjunction with Figure of description, the present invention is further illustrated:
As shown in figures 1 to 6, a kind of type of priority variable turns control valve, comprise valve body 1, small end cover 2, amplify spool 3, priority spool 4, Ls controls mouth plug screw 5, large end cap 9, turn to A mouth one-way valve 10, turn to B mouth one-way valve 11, select spool 12, commutator controls mouth a joint 13, commutator controls mouth b joint 14, turn to A mouth overload valve 15, turn to B mouth overload valve 16, Ls safety valve 17, priority spool 4 hole is provided with 5 oil ducts: be from left to right followed successively by oil duct L1, the oil duct EF be connected with work system multi-way valve filler opening, steering pump filler opening oil duct P, the oil duct P1 be connected with amplification spool 3 hole, oil duct L2, amplify spool 3 hole and be provided with 7 oil ducts: be from left to right followed successively by oil duct a2, back oil road T1, turn to a mouthful oil duct A, filler opening oil duct P1, turn to a mouthful oil duct B, back oil road T2, oil duct b2, described Ls controls mouth plug screw 5 is equipped with orifice plug I 6, orifice plug II 7 is respectively equipped with at described priority spool 4 two ends, orifice plug III 8, described large end cap 9 li is equipped with selects spool 12, commutator control mouth a joint 13, commutator control mouth b joint 14, commutator controls mouth a joint 13 and is arranged between hydraulic fluid port a and oil duct a1, control port a is communicated with oil duct a1, oil duct a3, commutator controls mouth b joint 14 and is arranged between hydraulic fluid port b and oil duct b1, and control port b is communicated with oil duct b1, oil duct b3, described turn to A mouth one-way valve 10 to be contained in turn to mouthful between oil duct A and oil duct a2, turn to B mouth one-way valve 11 to be contained in turn to mouthful between oil duct B and oil duct b2, oil duct a2 communicates with oil duct a4, oil duct b2 communicates with oil duct b4, the described mouthful oil duct A setting that turns to turns to A mouth overload valve 15, and turn to mouthful oil duct B to arrange and turn to B mouth overload valve 16, described Ls safety valve 17 is arranged on oil duct L1.
The present invention operationally has following several operating mode:
When 1, not turning to
As shown in figures 1 to 6, when commutator does not work, steering wheel is placed in the middle, LS mouth is zero by commutator and oil return cut-in pressure, amplify spool 3, spool 12 is selected to be in central position, P1 oil duct with turn to A mouth, turn between B mouth and be in closed state, this variations per hour steering pump P carrys out the oily orifice plug 7 by priority spool 4 two ends, orifice plug 8 oil-feed, action of hydraulic force is at priority spool 4 right-hand member, overcome the precompression of priority spool 4 spring, priority spool is moved to the left, the oil duct EF that now steering pump filler opening oil duct P is connected with work system multi-way valve filler opening is communicated with, steering pump oil all collaborates in work system, thus realize Dual-pump flow-converging, variable displacement pump does corresponding adjustment according to the pressure signal of multi-way valve to output flow, the flow of work system demand necessity is provided.
2, only turn to when not working
As shown in figures 1 to 6, when steering wheel turns left (right-hand rotation), variable displacement pump carrys out oil content two-way: lead up to commutator out pilot control oil with joint 13(14) control mouth a(b) connect, the LS control signal oil shunting out by commutator controls mouth plug screw 5 connect with variable displacement pump, Ls, another road through priority spool 4, amplification spool 3 all to steering cylinder.
When steering wheel turns left (right-hand rotation), the commutator joint 13 (14) of pilot control oil on large end cap 9 out controls mouth a (b) and is communicated with oil duct a1 (b1), act on the end selecting spool 12, promote to select spool 12 downward (upwards) mobile, oil duct b2(a2) by oil duct b4 (a4), oil duct b1 (a1) and oil duct b3 (a3) connect, select spool 12 the other end hydraulic oil by the joint 14(13 on large end cap 9) control mouth b(a) connect with commutator oil return, pilot control oil is through oil duct a1 (b1), oil duct a3 (b3) acts on the end of amplifying spool 3, promotion amplification spool 3 left (to the right) is mobile, simultaneously push open turn to B (A) mouth one-way valve 11 (12) to turning to a mouthful oil duct B (A) through amplifying aperture on spool 3 to oil duct b2 (a2), the oil that amplification spool 2 the other end oil duct b3 (a3) is extruded simultaneously is pushed open by oil duct b2 (a2) and is turned to B (A) mouth one-way valve
11 (12) also to turning to a mouthful oil duct B (A), now amplify the control of amount of movement by steering wheel rotating speed of spool 3, steering wheel rotating speed is faster, enter the pilot control flow amplifying certain end of spool 3 larger, the amount of movement amplifying spool is larger, then opening amount is larger, requirement enters steering cylinder fluid, and more multi-steering is faster, and act on variable displacement pump by the LS control signal that commutator shunts out, Displacement Regulation, make it to adapt with the demand of steering cylinder, the LS control signal that commutator simultaneously shunts out acts on the left end of priority spool 4 by throttling pore on orifice plug 6, due to the effect of the pressure reduction △ P between oil duct L1 chamber, priority spool about 4 two ends and oil duct L2 chamber and control spring power, priority spool is moved right, filler opening oil duct P1 opening increases, the oil duct EF opening be connected with work system multi-way valve filler opening is gradually reduced to closedown, priority spool is in right position, steering pump filler opening oil duct P, the oil duct P1 UNICOM be connected with amplification valve opening, variable steering pump comes oily all through filler opening oil duct P, the oil duct P1 be connected with amplification valve opening, the throttling groove amplified on spool 3 enters steering cylinder B (A) together with a (b) mouth pilot control oil, the hydraulic oil of steering cylinder A (B) is through turning to a mouthful oil duct A (B), amplify the throttling groove on spool 3, back oil road T2 oil return, realize a vehicle left side (right side) to turn to.Now variable displacement pump is according to the pressure signal of load sensing commutator, does corresponding adjustment to output flow, provides the flow of steering system demand necessity.
3, turn to while when working
As shown in figures 1 to 6, turn to while when working, the LS control signal that commutator shunts out acts on the left end of priority spool 4 by throttling pore on orifice plug 6, the fluid of filler opening oil duct P1 moves to steering cylinder with amplification spool 3, fluid produces pressure reduction △ P between oil duct L1 chamber and oil duct L2 chamber, the spring force of this pressure reduction and pressure-gradient control valve balances each other, when pressure reduction is less than the spring force of pressure-gradient control valve, priority spool 4 is in right position, the fluid of steering pump all supplies steering system, when pressure reduction is greater than pressure-gradient control valve spring force, promote priority spool 4 to move to left, the oil duct EF opening that filler opening oil duct P is connected with work system multi-way valve filler opening increases gradually, the unnecessary fluid of variable steering pump proceeds to the oil duct EF be connected with work system multi-way valve filler opening, thus preferentially ensure steering system, unnecessary fluid collaborates hydraulic system of working, now select from the large pressure signal of both commutator or multi-way valve by shuttle valve, act on variable displacement pump, pump is made to do corresponding adjustment to output flow, there is provided and turn to, the flow of work system demand necessity, reduce the unnecessary energy loss of system to greatest extent.
When steering-load is more than Ls safety valve 17 rating value, safety valve is opened, the release of LS mouth, the damage that protective system causes because of overpressure.
When steering cylinder to turn to A mouth overload valve 15 because external intervention reason causes load to exceed or turn to the setting pressure of B mouth overload valve 16, now off-load opened by overload valve, and protection steering cylinder goes out the damage caused from pressure.
Type of priority variable of the present invention turns control valve 18, with small displacement load sensing commutator 19, variable displacement pump 20 forms pump control load sensing variable steering hydraulic system together, bivariate converging system can be directly used in, select from the large pressure signal of both small displacement load sensing commutator 19 or multi-way valve 21 by shuttle valve, and act on variable displacement pump 20, pump is made to do corresponding adjustment to output flow, the flow of system requirements necessity is provided, solve the efficiency optimum matching problem of the steering hydraulic system of loader under any operating mode, reduce the unnecessary energy loss of system to greatest extent, reduce oil temperature, effectively play energy-conserving action.
Claims (4)
1. type of priority variable turns a control valve, comprises valve body (1), be arranged on the small end cover (2) on valve body (1), amplify spool (3), priority spool (4), Ls controls mouth plug screw (5) and large end cap (9), and described priority spool (4) hole is provided with oil duct L1, oil duct EF, oil duct P, oil duct P1 and oil duct L2, described amplification spool (3) hole is provided with oil duct a2, back oil road T1, oil duct A, oil duct P1, oil duct B, back oil road T2 and oil duct b2, it is characterized in that described Ls controls mouth plug screw (5) arranges orifice plug I (6), described priority spool (4) two ends are equipped with orifice plug II (7) and orifice plug III (8) respectively, arrange and select spool (12) in described large end cap (9), commutator controls mouth a joint (13), commutator controls mouth b joint (14), and on described oil duct A, setting turns to A mouth overload valve (15), arranges and turn to A mouth one-way valve (10) between oil duct A and oil duct a2, arrange between oil duct B and oil duct b2 and turn to B mouth one-way valve (11), on oil duct B, setting turns to B mouth overload valve (16), oil duct L1 is arranged Ls safety valve (17), and described selection spool (12) hole arranges hydraulic fluid port a, oil duct a1, oil duct a4, oil duct b4, oil duct b1, hydraulic fluid port b, oil duct a4 communicates with oil duct a2, and oil duct b2 communicates with oil duct b4, and described commutator controls mouth a joint (13) and is arranged between hydraulic fluid port a and oil duct a1, control port a and oil duct a1, oil duct a3 is communicated with, and commutator controls mouth b joint (14) and is arranged between hydraulic fluid port b and oil duct b1, control port b and oil duct b1, oil duct b3 is communicated with.
2. a kind of type of priority variable according to claim 1 turns control valve, it is characterized in that described oil duct EF is connected with work system multi-way valve filler opening.
3. a kind of type of priority variable according to claim 1 turns control valve, it is characterized in that described oil duct P1 is connected with amplification spool (3) hole.
4. a kind of type of priority variable according to claim 1 turns control valve, and it is characterized in that described oil duct P is steering pump filler opening oil duct, described oil duct A, oil duct B are and turn to a mouthful oil duct, and described oil duct P1 is filler opening oil duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210232636.XA CN102734245B (en) | 2012-07-06 | 2012-07-06 | Preferential-type variable steering control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210232636.XA CN102734245B (en) | 2012-07-06 | 2012-07-06 | Preferential-type variable steering control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102734245A CN102734245A (en) | 2012-10-17 |
| CN102734245B true CN102734245B (en) | 2015-05-27 |
Family
ID=46990328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210232636.XA Active CN102734245B (en) | 2012-07-06 | 2012-07-06 | Preferential-type variable steering control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102734245B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109185249A (en) * | 2018-09-28 | 2019-01-11 | 广东机电职业技术学院 | A kind of car hydrostatic steering system automatic control flow valve |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4716933A (en) * | 1986-10-16 | 1988-01-05 | J. I. Case Company | Valve unit |
| US5852935A (en) * | 1996-09-28 | 1998-12-29 | Danfoss A/S | Control valve |
| CN1361362A (en) * | 2000-12-28 | 2002-07-31 | 浙江临海海宏集团有限公司 | Priority-type flow rate enlarging and merging valve |
| JP2003130012A (en) * | 2001-10-26 | 2003-05-08 | Shimadzu Corp | Liquid pressure controlling device |
| KR20050064833A (en) * | 2003-12-24 | 2005-06-29 | 두산인프라코어 주식회사 | Hydraulic system in forklift truck |
| CN101255879A (en) * | 2007-12-10 | 2008-09-03 | 兰州理工大学 | Steering preference type flux amplification valve |
| CN201962040U (en) * | 2011-02-21 | 2011-09-07 | 安徽合力股份有限公司 | Forklift hydraulic system with functions of priority and unloading |
| CN102518170A (en) * | 2011-12-27 | 2012-06-27 | 四川大学 | Hydraulic system of loading machine working device |
| JP4969347B2 (en) * | 2007-07-10 | 2012-07-04 | 株式会社小松製作所 | Flow control device |
| CN202703681U (en) * | 2012-07-06 | 2013-01-30 | 浙江海克力液压有限公司 | Preferential variable steering control valve |
-
2012
- 2012-07-06 CN CN201210232636.XA patent/CN102734245B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4716933A (en) * | 1986-10-16 | 1988-01-05 | J. I. Case Company | Valve unit |
| US5852935A (en) * | 1996-09-28 | 1998-12-29 | Danfoss A/S | Control valve |
| CN1361362A (en) * | 2000-12-28 | 2002-07-31 | 浙江临海海宏集团有限公司 | Priority-type flow rate enlarging and merging valve |
| JP2003130012A (en) * | 2001-10-26 | 2003-05-08 | Shimadzu Corp | Liquid pressure controlling device |
| KR20050064833A (en) * | 2003-12-24 | 2005-06-29 | 두산인프라코어 주식회사 | Hydraulic system in forklift truck |
| JP4969347B2 (en) * | 2007-07-10 | 2012-07-04 | 株式会社小松製作所 | Flow control device |
| CN101255879A (en) * | 2007-12-10 | 2008-09-03 | 兰州理工大学 | Steering preference type flux amplification valve |
| CN201962040U (en) * | 2011-02-21 | 2011-09-07 | 安徽合力股份有限公司 | Forklift hydraulic system with functions of priority and unloading |
| CN102518170A (en) * | 2011-12-27 | 2012-06-27 | 四川大学 | Hydraulic system of loading machine working device |
| CN202703681U (en) * | 2012-07-06 | 2013-01-30 | 浙江海克力液压有限公司 | Preferential variable steering control valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102734245A (en) | 2012-10-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106759621B (en) | Load-sensitive formula loading machine determines variable delivery hydraulic system | |
| CN102229328B (en) | Vehicle mechanical energy-saving hydraulic system with multi-pump confluence | |
| CN201962040U (en) | Forklift hydraulic system with functions of priority and unloading | |
| CN201187492Y (en) | Anti-flow saturation combined proportional operating valve | |
| CN103062148B (en) | A kind of energy-saving priority unloading valve | |
| CN201180705Y (en) | High-pressure high-volume hydraulic loop device | |
| CN201896802U (en) | Unidirectional differential speed-regulation hydraulic control device | |
| CN103089729B (en) | Quantitative system load-sensitive multiple directional control valve | |
| CN104879336A (en) | Valve back compensation type load-sensitive multitandem valve with bidirectional confluence function | |
| CN102865387B (en) | Electric proportional multi-way valve | |
| CN104863914A (en) | Electrohydraulic joint control flow collecting valve | |
| CN202703681U (en) | Preferential variable steering control valve | |
| CN203098442U (en) | Energy-saving type priority unloading valve | |
| CN104989690A (en) | Overload relief valve | |
| CN105402182A (en) | Load sensing multi-way directional valve and hydraulic control system of loader | |
| CN106224306B (en) | Hydraulic system with flow-compensated function | |
| CN202851491U (en) | Load-sensitive multi-way valve used in loader variable system | |
| CN102734245B (en) | Preferential-type variable steering control valve | |
| CN202790680U (en) | Electronic controlled proportional multi-way valve | |
| CN109306976B (en) | Load sensitive control system | |
| CN109538556B (en) | System for controlling double-pump confluence and engineering machinery | |
| CN203770276U (en) | Double-way oil supply priority valve | |
| CN101737369B (en) | Dynamic load sensing priority and shunt type multiple-way directional valve | |
| CN205154780U (en) | Oil pump constant speed control system | |
| CN204704187U (en) | Overload unloading valve |
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 | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Preferential-type variable steering control valve Effective date of registration: 20191211 Granted publication date: 20150527 Pledgee: Zhejiang Rural Commercial Bank of China branch of Limited by Share Ltd Pledgor: Zhejiang Hercules Hydraulic Co., Ltd. Registration number: Y2019330000295 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20200804 Granted publication date: 20150527 Pledgee: Zhejiang Rural Commercial Bank of China branch of Limited by Share Ltd. Pledgor: ZHEJIANG HERCULES HYDRAULIC Co.,Ltd. Registration number: Y2019330000295 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201113 Address after: The coastal city of Taizhou city streets Jinling Road 317000 No. 199 in Zhejiang Province Patentee after: ZHEJIANG HAIHONG HYDRAULIC TECHNOLOGY Co.,Ltd. Address before: Boye road Taizhou city Zhejiang Province coastal city 317000 No. 99 (Luohe) Patentee before: ZHEJIANG HERCULES HYDRAULIC Co.,Ltd. |
|
| TR01 | Transfer of patent right |