CN201255257Y - Power constant control valve - Google Patents

Power constant control valve Download PDF

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Publication number
CN201255257Y
CN201255257Y CNU200820164315XU CN200820164315U CN201255257Y CN 201255257 Y CN201255257 Y CN 201255257Y CN U200820164315X U CNU200820164315X U CN U200820164315XU CN 200820164315 U CN200820164315 U CN 200820164315U CN 201255257 Y CN201255257 Y CN 201255257Y
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CN
China
Prior art keywords
die cavity
spring
cavity
valve
pressure
Prior art date
Application number
CNU200820164315XU
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Chinese (zh)
Inventor
高志明
章建衡
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高志明
Priority date (The priority date 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 date listed.)
Filing date
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Priority to CNU200820164315XU priority Critical patent/CN201255257Y/en
Application granted granted Critical
Publication of CN201255257Y publication Critical patent/CN201255257Y/en

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Abstract

The utility model relates to a novel constant-power control valve, comprising a valve body, wherein, the valve body is provided with a first slide cavity and a second slide cavity which are parallel. A first control cavity is arranged at one end of the first slide cavity. A second control cavity is arranged at one end of the second slide cavity. The valve body is provided with a die cavity P which is communicated with an exterior high-pressure oil inlet path. The die cavity P is communicated with the first slide cavity and the second cavity. The valve body is provided with a die cavity A which is communicated with the first slide cavity. The valve body is also provided with a die cavity A1 and a die cavity A2, and the die cavity A1 is communicated with the first slide cavity and the second slide cavity. The die cavity A2 is communicated with the die cavity A by a first damping screw, and communicated with the die cavity A1 by a second damping screw. An adjusting assembly controlled by the spring is abutted and pressed on the top of the first valve core, so the adjustability of the pressure of the oil inlet path is realized. The input power and the output power are constant by sampling and comparing the pressures of the die cavity A1 and the die cavity P of the system main oil path.

Description

Constant power control valve

Technical field

The utility model relates to the technical field of hydrovalve in the hydraulic element, particularly a kind of constant power control valve.

Background technique

Its design principle of control valve of permanent power mostly is forms such as proportional control, pressure difference compensation, machine feedback, and the machine feedback form such as the patent No. are that the Chinese utility model patent " self-operated fluid pressure controlled valve " (notification number is CN200949692Y) of ZL200620110900.2 is exactly this type of design; It mainly is made up of valve body and cylinder body two big parts, described valve body two ends are provided with import, outlet, the centre is provided with medium control mouth and valve seat and main pipe, spool links into an integrated entity by valve gap and valve rod and piston, between valve gap and piston, be provided with lower chambers, communicate with passage, passage links to each other with main pipe in valve body, and communicates with upper chamber in the cylinder body by needle-valve; Be provided with spring seat in the cylinder body, and constitute one with the conduit on cylinder body top, adjusting screw is housed in the conduit, the spring in the spring seat is located at the top of piston.This design is by the pressure ratio between filler opening and the oil outlet, reach the balance of output incoming pressure by the piston of machinery control, promptly realize the constant setting of power, but do not have on the main valve plug in this design and be provided with pressure controlled adjusting part, the i.e. adjusting of uncontrollable output power value and qualification; And with sample tap that delivery outlet communicates on do not have the relief valve of being provided with yet, it does not have the secondary Safety performance.

Summary of the invention

Technical problem to be solved in the utility model is the present situation at prior art, and a kind of rational in infrastructure, making is convenient, workable and hydraulic system is safe constant power control valve is provided.

The utility model solves the problems of the technologies described above the technological scheme that is adopted: constant power control valve, comprise valve body, this valve body is shaped on two the first sliding chambeies that parallel and the second sliding chamber, the first sliding chamber, one end is shaped on first control chamber, the second sliding chamber, one end also is shaped on second control chamber, valve body is shaped on the P die cavity that can be connected with the external high pressure in-line, and this P die cavity is connected with the first sliding chamber, the second sliding chamber; Valve body is shaped on the A die cavity that can be connected with the external high pressure vent line, and this A die cavity is connected with the first sliding chamber; Valve body also is shaped on the A2 die cavity of end opening sealing and the A1 die cavity that can be connected with the external high pressure vent line, and the A1 die cavity is connected with the first sliding chamber, the second sliding chamber; The A2 die cavity is connected with the A die cavity through the first damping screw, and the A2 die cavity is connected with the first sliding chamber, the second sliding chamber, and this A2 die cavity also is connected with the A1 die cavity through the second damping screw; Be sliding combined with first spool in the first sliding chamber, an end roof pressure of this first spool has first adjusting part, and this first adjusting part is fitted in first control chamber; Be sliding combined with second spool in the second sliding chamber, an end roof pressure of this second spool has second adjusting part, and this second adjusting part is fitted in second control chamber.

The measure of taking also comprises:

The second above-mentioned control chamber is connected with the A1 die cavity, and is fitted with the 3rd damping screw between this second control chamber and the A1 die cavity.

The second above-mentioned adjusting part includes second pedestal, and this second pedestal seals equipped the connection mutually with second control chamber; Be shaped on second inner cavity in the middle of the second above-mentioned pedestal, be embedded with the 3rd spring part in this second inner cavity, the front end of the 3rd spring part is fitted with second top-pressure part, and this second top-pressure part is touched connection mutually with the termination of second spool; The rear end roof pressure of the 3rd spring part has second spring seat.

The second above-mentioned spring seat and the second inner cavity internal face sealed sliding are mutually joined; The second spring seat rear end is equipped with can control second adjustable lever that this second spring seat slides, and this second adjustable lever and second pedestal screw thread mutually spin.

The second above-mentioned top-pressure part rear end is fitted with the 4th spring, and the 4th spring is nested in the 3rd spring part; Be connected with second and cap on the second above-mentioned adjustable lever.

The second above-mentioned adjustable lever tail end also is connected with second adjusting nut; The 4th above-mentioned spring is opposite with the thread rotary orientation of the 3rd spring part.

The first above-mentioned adjusting part includes first pedestal, and this first pedestal seals equipped the connection mutually with first control chamber; Be shaped on first inner cavity in the middle of first pedestal, be embedded with first spring part in this first inner cavity, the front end of this first spring part is fitted with first top-pressure part, and this first top-pressure part is touched connection mutually with the termination of first spool; The rear end roof pressure of first spring part has first spring seat.

The first above-mentioned spring seat and the first inner cavity internal face sealed sliding are mutually joined; The first above-mentioned spring seat rear end is equipped with can control first adjustable lever that this first spring seat slides, and this first adjustable lever and first pedestal screw thread mutually spin.

The first above-mentioned top-pressure part rear end is fitted with second spring, and this second spring is nested in first spring part; Be connected with first and cap on the first above-mentioned adjustable lever.

The first above-mentioned adjustable lever tail end also is connected with first adjusting nut; The second above-mentioned spring is opposite with the thread rotary orientation of first spring part; The first above-mentioned control chamber is connected with the A1 die cavity.

Compared with prior art, the utility model comprises valve body, this valve body is shaped on two the first sliding chambeies that parallel and the second sliding chamber, the first sliding chamber, one end is shaped on first control chamber, the second sliding chamber, one end also is shaped on second control chamber, valve body is shaped on the P die cavity that can be connected with the external high pressure in-line, and this P die cavity is connected with the first sliding chamber, the second sliding chamber; Valve body is shaped on the A die cavity that can be connected with the external high pressure vent line, and this A die cavity is connected with the first sliding chamber; Valve body also is shaped on the A2 die cavity of end opening sealing and the A1 die cavity that can be connected with the external high pressure vent line, and the A1 die cavity is connected with the first sliding chamber, the second sliding chamber; The A2 die cavity is connected with the A die cavity through the first damping screw, and the A2 die cavity is connected with the first sliding chamber, the second sliding chamber, and this A2 die cavity also is connected with the A1 die cavity through the second damping screw; Be sliding combined with first spool in the first sliding chamber, an end roof pressure of this first spool has first adjusting part, and this first adjusting part is fitted in first control chamber; Be sliding combined with second spool in the second sliding chamber, an end roof pressure of this second spool has second adjusting part, and this second adjusting part is fitted in second control chamber.Advantage of the present utility model is: the A die cavity of the P die cavity of high pressure oil and system working connection moves the break-make that realizes two oil circuits by the commutation of first spool and is connected, and it opens and closes flexible, has may command performance preferably; The termination roof pressure of this first spool has been realized the adjustability of the inlet and outlet of fuel channel pressure difference value between P die cavity and the A die cavity by spring controlled adjusting part, has stronger actual operation; The auxiliary A1 die cavity that communicates with the system working connection is set in valve body, and this A1 die cavity is communicated with second adjusting part that is positioned at valve body top through damping hole, has realized the secondary security settings of system's working connection; In the middle of valve body, be shaped on the A2 type that can communicate with A die cavity, A1 die cavity respectively, and this A2 die cavity is connected with the P die cavity by second spool, reach the direct comparison of taking a sample in the pressure of the A1 of system's working connection die cavity and P die cavity, and then reach the P die cavity and equate, and the constancy of output power with the pressure of A die cavity; The hydraulic control circuit that adopts damping hole to gang up, simple in structure, it is convenient to make.

Description of drawings

Fig. 1 is vertical cross-sectional schematic of the utility model embodiment;

Fig. 2 is the dextrad schematic representation of Fig. 1.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

To shown in Figure 2, figure grade is described as follows as Fig. 1: valve body 1, the first sliding chamber 11, second sliding chamber 12, the first control chambers, 13, the second control chambers 14, the first damping screw, 21, the second damping screws, 22, the three damping screws 23, first spool, 31, the second spools, 32, the first adjusting parts 4, first pedestal, 41, the first inner cavity 41a, first spring part 42, first top-pressure part, 43, the first spring seats, 44, the first adjustable levers 45, second spring 46, the first and cap 47, the first adjusting nuts 48, second adjusting part, 5, the second pedestals, 51, the second inner cavity 51a, the 3rd spring part 52, the second top-pressure parts 53, the second spring seats 54, second adjustable lever, 55, the four spring 56, the second and caps 57, second adjusting nut 58, P die cavity, A die cavity, the A1 die cavity, the A2 die cavity.

The utility model embodiment, constant power control valve, comprise valve body 1, this valve body 1 is shaped on two the first sliding chambeies 11 that parallel and the second sliding chamber 12, the first sliding chamber, 11 1 ends are shaped on first control chamber 13, the second sliding chamber, 12 1 ends also are shaped on second control chamber 14, and valve body 1 is shaped on the P die cavity that can be connected with the external high pressure in-line, and this P die cavity is connected with 11, the second sliding chamber 12, the first sliding chamber; Valve body 1 is shaped on the A die cavity that can be connected with the external high pressure vent line, and this A die cavity is connected with the first sliding chamber 11; Valve body 1 also is shaped on the A2 die cavity of end opening sealing and the A1 die cavity that can be connected with the external high pressure vent line, and the A1 die cavity is connected with 11, the second sliding chamber 12, the first sliding chamber; The A2 die cavity is connected with the A die cavity through the first damping screw 21, and the A2 die cavity is connected with 11, the second sliding chamber 12, the first sliding chamber, and this A2 die cavity also is connected with the A1 die cavity through the second damping screw 22; Be sliding combined with first spool 31 in the first sliding chamber 11, an end roof pressure of this first spool 31 has first adjusting part 4, and this first adjusting part 4 is fitted in first control chamber 13; Be sliding combined with second spool 32 in the second sliding chamber 12, an end roof pressure of this second spool 32 has second adjusting part 5, and this second adjusting part 5 is fitted in second control chamber 14.

Second control chamber 14 is connected with the A1 die cavity, and is fitted with the 3rd damping screw 23 between this second control chamber 14 and the A1 die cavity.

Second adjusting part 5 includes second pedestal 51, and this second pedestal 51 seals equipped the connection mutually with second control chamber 14; Be shaped on the second inner cavity 51a in the middle of second pedestal 51, the front end that is embedded with the 3rd spring part 52, the three spring parts 52 in this second inner cavity 51a is fitted with second top-pressure part 53, and this second top-pressure part 53 is touched connection mutually with the termination of second spool 32; The rear end roof pressure of the 3rd spring part 52 has second spring seat 54.Second spring seat 54 and the second inner cavity 51a internal face sealed sliding are mutually joined; Second spring seat, 54 rear ends be equipped with can control second adjustable lever, 55, the second adjustable levers 55 that this second spring seat 54 slides and second pedestal 51 mutually screw thread spin.Second top-pressure part, 53 rear ends are fitted with the 4th spring 56, and the 4th spring 56 is nested in the 3rd spring part 52; Be connected with second and cap 57 on second adjustable lever 55.Second adjustable lever, 55 tail ends also are connected with second adjusting nut 58; The 4th spring 56 is opposite with the thread rotary orientation of the 3rd spring part 52.

First adjusting part 4 includes first pedestal 41, and this first pedestal 41 seals equipped the connection mutually with first control chamber 13; Be shaped on the first inner cavity 41a in the middle of first pedestal 41, be embedded with first spring part 42 in this first inner cavity 41a, the front end of this first spring part 42 is fitted with first top-pressure part 43, and this first top-pressure part 43 is touched connection mutually with the termination of first spool 31; The rear end roof pressure of first spring part 42 has first spring seat 44.First spring seat 44 and the first inner cavity 41a internal face sealed sliding are mutually joined; First spring seat, 44 rear ends be equipped with can control first adjustable lever, 45, the first adjustable levers 45 that this first spring seat 44 slides and first pedestal 41 mutually screw thread spin.First top-pressure part, 43 rear ends are fitted with second spring 46, and this second spring 46 is nested in first spring part 42; Be connected with first and cap 47 on first adjustable lever 45.First adjustable lever, 45 tail ends also are connected with first adjusting nut 48; Second spring 46 is opposite with the thread rotary orientation of first spring part 42; First control chamber 13 is connected with the A1 die cavity.

Working principle of the present utility model is as follows:

High pressure oil on system's working connection enters in the valve body 1 through the P die cavity, promotes first spool 31 and moves right, and uses the P die cavity to communicate with the A die cavity, the flow of the high pressure oil control system working connection that comes out with the A die cavity.In order to reach energy-conservation effect, communicate with the A1 chamber by throttle valve from working connection, the comparison of the pressure by P die cavity and A1 die cavity, whether with A die cavity identical, thereby realized the control of power if controlling the P die cavity, reach energy-conservation effect.Because the rated power of system input is fixed, the safety pressure by the 3rd spring part 52, the 4th spring 56 initialization systems, come the safety of protective system.

Advantage of the present utility model is: the A die cavity of the P die cavity of high pressure oil and system working connection moves the break-make that realizes two oil circuits by the commutation of first spool and is connected, and it opens and closes flexible, has may command performance preferably; The termination roof pressure of this first spool has been realized the adjustability of the inlet and outlet of fuel channel pressure difference value between P die cavity and the A die cavity by spring controlled adjusting part, has stronger actual operation; The auxiliary A1 die cavity that communicates with the system working connection is set in valve body, and this A1 die cavity is communicated with second adjusting part that is positioned at valve body top through damping hole, has realized the secondary security settings of system's working connection; In the middle of valve body, be shaped on the A2 type that can communicate with A die cavity, A1 die cavity respectively, and this A2 die cavity is connected with the P die cavity by second spool, reach the direct comparison of taking a sample in the pressure of the A1 of system's working connection die cavity and P die cavity, and then reach the P die cavity and equate, and the constancy of output power with the pressure of A die cavity; The hydraulic control circuit that adopts damping hole to gang up, simple in structure, it is convenient to make.

Most preferred embodiment of the present utility model is illustrated, and various variations or the remodeling made by those of ordinary skills can not break away from scope of the present utility model.

Claims (10)

1, constant power control valve, comprise valve body (1), described valve body (1) is shaped on two the first sliding chambeies (11) that parallel and the second sliding chamber (12), the described first sliding chamber (11) one ends are shaped on first control chamber (13), the described second sliding chamber (12) one ends also are shaped on second control chamber (14), it is characterized in that: described valve body (1) is shaped on the P die cavity that can be connected with the external high pressure in-line, and this P die cavity is connected with the first sliding chamber (11), the second sliding chamber (12); Described valve body (1) is shaped on the A die cavity that can be connected with the external high pressure vent line, and this A die cavity is connected with the first sliding chamber (11); Described valve body (1) also is shaped on the A2 die cavity of end opening sealing and the A1 die cavity that can be connected with the external high pressure vent line, and described A1 die cavity is connected with the first sliding chamber (11), the second sliding chamber (12); Described A2 die cavity is connected with the A die cavity through the first damping screw (21), and described A2 die cavity is connected with the first sliding chamber (11), the second sliding chamber (12), and this A2 die cavity also is connected with the A1 die cavity through the second damping screw (22);
Be sliding combined with first spool (31) in the described first sliding chamber (11), an end roof pressure of this first spool (31) has first adjusting part (4), and this first adjusting part (4) is fitted in first control chamber (13);
Be sliding combined with second spool (32) in the described second sliding chamber (12), an end roof pressure of this second spool (32) has second adjusting part (5), and this second adjusting part (5) is fitted in second control chamber (14).
2, constant power control valve according to claim 1 is characterized in that: described second control chamber (14) is connected with the A1 die cavity, and is fitted with the 3rd damping screw (23) between this second control chamber (14) and the A1 die cavity.
3, constant power control valve according to claim 2 is characterized in that: described second adjusting part (5) includes second pedestal (51), and this second pedestal (51) seals equipped the connection mutually with second control chamber (14); Be shaped on second inner cavity (51a) in the middle of described second pedestal (51), be embedded with the 3rd spring part (52) in this second inner cavity (51a), the front end of the 3rd spring part (52) is fitted with second top-pressure part (53), and this second top-pressure part (53) is touched connection mutually with the termination of second spool (32); The rear end roof pressure of described the 3rd spring part (52) has second spring seat (54).
4, constant power control valve according to claim 3 is characterized in that: described second spring seat (54) and second inner cavity (51a) internal face sealed sliding are mutually joined; Described second spring seat (54) rear end is equipped with can control second adjustable lever (55) that this second spring seat (54) slides, and described second adjustable lever (55) and second pedestal (51) screw thread mutually spin.
5, constant power control valve according to claim 4 is characterized in that: described second top-pressure part (53) rear end is fitted with the 4th spring (56), and the 4th spring (56) is nested in the 3rd spring part (52); Be connected with second and cap (57) on described second adjustable lever (55).
6, constant power control valve according to claim 5 is characterized in that: described second adjustable lever (55) tail end also is connected with second adjusting nut (58); Described the 4th spring (56) is opposite with the thread rotary orientation of the 3rd spring part (52).
7, constant power control valve according to claim 2 is characterized in that: described first adjusting part (4) includes first pedestal (41), and this first pedestal (41) seals equipped the connection mutually with first control chamber (13); Be shaped on first inner cavity (41a) in the middle of described first pedestal (41), be embedded with first spring part (42) in this first inner cavity (41a), the front end of this first spring part (42) is fitted with first top-pressure part (43), and this first top-pressure part (43) is touched connection mutually with the termination of first spool (31); The rear end roof pressure of described first spring part (42) has first spring seat (44).
8, constant power control valve according to claim 7 is characterized in that: described first spring seat (44) and first inner cavity (41a) internal face sealed sliding are mutually joined; Described first spring seat (44) rear end is equipped with can control first adjustable lever (45) that this first spring seat (44) slides, and described first adjustable lever (45) and first pedestal (41) screw thread mutually spin.
9, constant power control valve according to claim 8 is characterized in that: described first top-pressure part (43) rear end is fitted with second spring (46), and this second spring (46) is nested in first spring part (42); Be connected with first and cap (47) on described first adjustable lever (45).
10, constant power control valve according to claim 9 is characterized in that: described first adjustable lever (45) tail end also is connected with first adjusting nut (48); Described second spring (46) is opposite with the thread rotary orientation of first spring part (42); Described first control chamber (13) is connected with the A1 die cavity.
CNU200820164315XU 2008-09-18 2008-09-18 Power constant control valve CN201255257Y (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CNU200820164315XU CN201255257Y (en) 2008-09-18 2008-09-18 Power constant control valve

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CN201255257Y true CN201255257Y (en) 2009-06-10

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101865143A (en) * 2010-07-08 2010-10-20 中国航天科技集团公司第六研究院第十一研究所 Device for automatically adjusting power of turbine pump
CN101922445A (en) * 2010-07-29 2010-12-22 杭州力龙液压有限公司 Constant power control valve
CN102102690A (en) * 2011-04-01 2011-06-22 马鞍山科瑞达机械制造有限公司 Wet solenoid directional valve capable of relieving hydraulic directional impact
CN102996697A (en) * 2012-12-10 2013-03-27 河海大学常州校区 Hydraulic rotary damper
CN104234992A (en) * 2013-11-20 2014-12-24 江苏恒立液压有限公司 Plunger pump power control device and control method thereof
CN104358678A (en) * 2014-10-23 2015-02-18 浙江赛克思液压有限公司 Leak-proof power matching control valve for hydraulic pump
CN104565471A (en) * 2015-01-21 2015-04-29 苏州市内田液压机械设备贸易有限公司 Constant power control valve element
CN105065360A (en) * 2015-08-31 2015-11-18 苏州萨伯工业设计有限公司 Constant-power control device and pressure variable control method thereof
CN105114665A (en) * 2015-08-31 2015-12-02 苏州萨伯工业设计有限公司 Flow and pressure control valve
CN105156378A (en) * 2015-08-31 2015-12-16 苏州萨伯工业设计有限公司 Variable control device of hydraulic pump and control method thereof
CN105156377A (en) * 2015-08-31 2015-12-16 苏州萨伯工业设计有限公司 Output flow controlling device with hydraulic pump

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101865143A (en) * 2010-07-08 2010-10-20 中国航天科技集团公司第六研究院第十一研究所 Device for automatically adjusting power of turbine pump
CN101922445B (en) * 2010-07-29 2013-08-21 杭州力龙液压有限公司 Constant power control valve
CN101922445A (en) * 2010-07-29 2010-12-22 杭州力龙液压有限公司 Constant power control valve
CN102102690A (en) * 2011-04-01 2011-06-22 马鞍山科瑞达机械制造有限公司 Wet solenoid directional valve capable of relieving hydraulic directional impact
CN102996697A (en) * 2012-12-10 2013-03-27 河海大学常州校区 Hydraulic rotary damper
CN102996697B (en) * 2012-12-10 2014-08-27 河海大学常州校区 Hydraulic rotary damper
CN104234992B (en) * 2013-11-20 2016-08-17 江苏恒立液压有限公司 A kind of power of plunger pump controls device and control method thereof
CN104234992A (en) * 2013-11-20 2014-12-24 江苏恒立液压有限公司 Plunger pump power control device and control method thereof
CN104358678A (en) * 2014-10-23 2015-02-18 浙江赛克思液压有限公司 Leak-proof power matching control valve for hydraulic pump
CN104565471A (en) * 2015-01-21 2015-04-29 苏州市内田液压机械设备贸易有限公司 Constant power control valve element
CN105065360A (en) * 2015-08-31 2015-11-18 苏州萨伯工业设计有限公司 Constant-power control device and pressure variable control method thereof
CN105114665A (en) * 2015-08-31 2015-12-02 苏州萨伯工业设计有限公司 Flow and pressure control valve
CN105156378A (en) * 2015-08-31 2015-12-16 苏州萨伯工业设计有限公司 Variable control device of hydraulic pump and control method thereof
CN105156377A (en) * 2015-08-31 2015-12-16 苏州萨伯工业设计有限公司 Output flow controlling device with hydraulic pump
CN105156377B (en) * 2015-08-31 2018-01-05 苏州萨伯工业设计有限公司 A kind of output flow control device of hydraulic pump

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C14 Grant of patent or utility model
GR01 Patent grant
TR01 Transfer of patent right

Effective date of registration: 20110124

Address after: Jiangbei District, Zhejiang city of Ningbo Province China 315021 Street No. 195 Ningbo gontin sks Hydraulic Co. Ltd.

Patentee after: Ningbo Wide Sky SKS Hydraulic Co., Ltd.

Address before: Jiangbei District, Zhejiang city of Ningbo Province China 315021 Street No. 195 Ningbo gontin sks Hydraulic Co. Ltd.

Patentee before: Gao Zhiming

ASS Succession or assignment of patent right

Owner name: NINGBO WIDE SKY SKS HYDRAULIC CO., LTD.

Free format text: FORMER OWNER: GAO ZHIMING

Effective date: 20110124

C41 Transfer of patent application or patent right or utility model
EXPY Termination of patent right or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20090610

Termination date: 20150918