CN201934236U - Fuel filter base and fuel filter comprising same - Google Patents
Fuel filter base and fuel filter comprising same Download PDFInfo
- Publication number
- CN201934236U CN201934236U CN2010206608287U CN201020660828U CN201934236U CN 201934236 U CN201934236 U CN 201934236U CN 2010206608287 U CN2010206608287 U CN 2010206608287U CN 201020660828 U CN201020660828 U CN 201020660828U CN 201934236 U CN201934236 U CN 201934236U
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- China
- Prior art keywords
- fuel
- filter
- fuel filter
- seat
- oil
- 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 - Lifetime
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 72
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000012530 fluid Substances 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 43
- 239000000295 fuel oil Substances 0.000 claims description 34
- 230000008878 coupling Effects 0.000 claims description 26
- 238000010168 coupling process Methods 0.000 claims description 26
- 238000005859 coupling reaction Methods 0.000 claims description 26
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 19
- 239000000945 filler Substances 0.000 claims description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 6
- 238000004140 cleaning Methods 0.000 abstract 1
- 210000004907 gland Anatomy 0.000 description 8
- 238000007599 discharging Methods 0.000 description 7
- 238000001914 filtration Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 239000002828 fuel tank Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000994 depressogenic effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 244000273618 Sphenoclea zeylanica Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Landscapes
- Filtration Of Liquid (AREA)
Abstract
The utility model provides a fuel filter seat and a fuel filter comprising the same. The fuel filter seat comprises a seat body, a manual pump and a main one-way valve; the seat body is provided with a fuel inlet and a fuel outlet; the manual pump is arranged on a cleaning side of the seat body for fuel flow which is filtered by a filter element component to flow through, and is provided with a fuel inlet one-way valve and a fuel outlet one-way valve; the main one-way valve is arranged in the seat body; the filter seat also comprises a hollow connecting shaft which is detachably connected with the seat body in a sealing way; one end of the connecting shaft compresses the main one-way valve; and the connecting shaft forms a fuel inlet channel for the fuel to enter the seat body from the filter element inner cavity of the filter element component and at least one hole which is arranged on a side wall and is communicated with the fluid of the fuel inlet one-way valve. The fuel filter also comprises a heater and/or a water level alarm.
Description
Technical field
The utility model relates to a kind of automobile fuel oil filter cleaner seat and comprises the fuel filter of this fuel filter seat, and more specifically, this fuel filter seat comprises the hand pump that is used for discharging the fuel oil air.
Background technique
The clean degree of fuel oil has a significant impact vehicle fuel system works reliability and working life.The function of fuel filter is exactly the impurity of removing in the fuel oil, perhaps impurity and moisture.Traditional fuel filter comprises that inside comprises the filter case and the strainer cover of filter core.Can also discharging valve be set in the filter case bottom.During work, enter space between filter case and the filter core from the fuel oil of fuel tank from the filler opening on the strainer cover, pass through then after the filter element filtering, flow out via the oil outlet on the strainer cover, thereby realize filtering purpose by hollow stem with the filter core internal fluid communication.
Yet for traditional fuel filter, when the filter core that more renews, whole filter cleaner inner product has a large amount of gas.If gas is not discharged outside the filter cleaner, this part gas will enter in fuel pipe and the engine igniting system, and motor can't normally be started., traditional fuel filter is improved, i.e. integrated hand pump on strainer cover for this reason.The workflow of hand pump is as follows: when hand pump gland and diaphragm lifted by pressure spring, fuel oil entered the hand pump pump chamber through the filler opening on oil pipe, the strainer cover, the in line check valve of hand pump earlier; When the hand pump gland was depressed by external force, the fuel oil in the pump chamber was pressed in the filter cleaner by the fuel-displaced one-way valve of hand pump.Repeated presses hand pump gland like this, the air in the new filter cleaner will be squeezed filter cleaner by fuel oil, and fuel oil filters back arrival oil outlet through filter cleaner simultaneously.At manual air pump inoperative and during the diesel engine proper functioning, fuel oil through filler opening, main one-way valve, filter cleaner to oil outlet.
From above process as can be known, the fuel oil that hand pump work the time enters the hand pump pump chamber is that the filtered device filters, and promptly enters in the fuel oil of pump chamber to have impurity, and this makes the pump oil efficient of hand pump reduce, and shorten working life.China utility model patent CN 201339524Y discloses a kind of fuel filter seat, wherein hand pump is arranged on the clean side of this fuel filter seat, the fuel filter seat is threaded with fuel oil fitering element by integrally formed with it coupling shaft, make when hand pump is worked, clean fuel oil after the filtration enters pump chamber, thereby can not cause the oil-feed and the fuel-displaced one-way valve premature failure of hand pump; Manually when air pump inoperative and diesel engine proper functioning fuel oil through filler opening, filter core, main one-way valve to oil outlet.
Yet, in above-mentioned model utility, because coupling shaft and filter cleaner seat are integrally formed, so the installation of main one-way valve in the filter cleaner seat is inconvenient and fixing insecure.
In addition, above-mentioned model utility also discloses a kind of fuel filter, and it comprises above-mentioned fuel filter seat and the element kit that is connected with described filter cleaner seat.Yet the filter core of this element kit is supported by helical spring in the bottom, therefore exists to locate shortcoming unreliable and assembling inconvenience.
In addition, the fuel filter of prior art is provided with discharging valve in the element kit bottom, emits for the water that the operator will amass in element kit.Yet the operator can not see the water level the element kit from the outside, and filter cleaner often can not get in time discharging water in therefore actual the use, thereby influence enters the fuel oil quality of motor.
The model utility content
On the one hand, the utility model provides a kind of production technology simple fuel filter seat.This fuel filter seat comprises: pedestal, and it is provided with filler opening and oil outlet; Hand pump, it is arranged on the clean side that the fuel oil after the filtering for element kit of described pedestal is flowed through, and is provided with in line check valve and fuel-displaced one-way valve; Main one-way valve, it is installed in the described pedestal, it is characterized in that, described filter cleaner seat also comprises the hollow coupling shaft that removably is tightly connected with described pedestal, and described coupling shaft at one end compresses described main one-way valve and this coupling shaft and forms fuel oil and enter the oil inlet passage of pedestal and be provided with at least one hole that is communicated with the in line check valve fluid at sidewall from the filter core inner chamber of described element kit.By removably connecting of coupling shaft and pedestal, realize the simple and reliable installation of main one-way valve.
Preferably, described oil-feed and fuel-displaced one-way valve are realized hand pump pump functional oil by a check valve assembly by the different installation direction on pedestal respectively, this check valve assembly by valve seat, seal valve block, provide the spring of valve block pre-pressing force and the supporting frame of supported spring to form.Valve block is close on the valve seat under the effect of spring force, guarantees the one-way valve reliable sealing, and the assembling up-to-standard rate improves more than 5%.
Preferably, on described main one-way valve, also be provided with seal ring, make to form reliable sealing with pedestal.
Preferably, described coupling shaft is provided with four described holes on sidewall, guarantees that fuel oil enters the low flow resistance of pump chamber.
Preferably, described filler opening and oil outlet are provided with copper sheathing, have higher turbidity test and lower granularity with the fuel oil that guarantees turnover filter cleaner seat.
On the other hand, the utility model provides a kind of production simple fuel filter.This fuel filter comprises above-mentioned fuel filter seat and element kit.
Preferably, the filter core of described filter element part is supported by the turriform spring in the bottom, and the assurance filter core can reliably be located in element kit, is convenient to the filter core assembling simultaneously.
In addition, in order to solve motor starts difficulty under low temperature condition problem, fuel filter of the present utility model also comprises heater, it is installed between filter cleaner seat and the element kit hermetically, and this heater has the device that is communicated with the cavity fluid of the oil inlet passage of coupling shaft and element kit.
Preferably, described heater comprises heater housing, heater band, heat conduction board, elastic pressuring plate, Cock screw, hollow stud and terminal, and described heater is connected in the coupling shaft and the described element kit of described filter cleaner seat by described hollow stud.
In addition, in time filter cleaner is discharged water in order to remind the operator, fuel filter of the present utility model also comprises the water-level alarm device of being located at the element kit bottom, and it comprises level sensor and the alarm unit that is connected with described level sensor operability.
Preferably, described level sensor comprises sensor body and float, and described sensor body is threaded with the element kit lower end, and described float attaches to the top of described sensor body.
Description of drawings
Of the present utility model above-mentioned with and other objects and advantages by with reference to the following drawings and can be more obvious, in the accompanying drawings in embodiment's mode:
Fig. 1 is the structural representation of the fuel filter of an embodiment of the present utility model.
Fig. 2 is the plan view of Fig. 1.
Fig. 3 is the structural representation of oil-feed of the present utility model and fuel-displaced one-way valve.
Fig. 4 is the structural representation of the fuel filter of another embodiment of the present utility model.
Embodiment
Fuel filter seat of the present utility model and the fuel filter that comprises this fuel filter seat are described hereinafter with reference to the accompanying drawings by way of example.However, it should be understood that following embodiment and accompanying drawing only are illustrative, do not limit the scope of the invention.In addition, for clarity sake, the accompanying drawing not drawn on scale.
As shown in Figure 1, fuel filter comprises fuel filter seat and element kit.The oil outlet of fuel filter seat (oil road) 1, filler opening (oil input channel) 12 lay respectively at the top that pedestal 13 tops and oil outlet 1 are positioned at oil-feed 12.Described filter cleaner seat also is provided with hand pump, and wherein fuel-displaced one-way valve 3, in line check valve 10 are threaded onto pedestal 13 for fuel oil turnover pump chamber 21.As shown in Figure 2, stainless steel cover 4 is fixed in pedestal by fastening screw trip bolt 2 with outer gland 5, internal gland 6, diaphragm 7, pressure spring 8.Main one-way valve 11, seal ring 9 are pressed in by screw thread by coupling shaft 14 and form reliable sealing in the pedestal.Establish hollow oil duct 15 in the coupling shaft 14, coupling shaft 14 is threadedly connected on the internal thread at element kit 16 middle parts by coupling shaft, guarantees that the clean oil through filter element filtering enters oil outlet 1 by hollow oil duct 15, main one-way valve 11 when engine operation.4 side direction oil channel holes 20 are set, the pump oil oil duct when realizing hand pump pump oil in the coupling shaft side.The connecting thread of element kit 16 is threaded onto on the coupling shaft, and the inside filter core of element kit is supported on the filter tank by turriform spring 18.
As shown in Figure 2, the oil inlet and outlet of pedestal 13 is provided with copper sheathing 19 at port, has lower turbidity test and granularity to guarantee the filter cleaner hand pump, and oil inlet and outlet has higher join strength.
Fig. 3 shows a preferred embodiment of oil-feed and fuel-displaced one-way valve, described oil-feed realizes hand pump pump functional oil by a check valve assembly by the different installation direction on pedestal with fuel-displaced one-way valve 3 respectively with 10, and this check valve assembly is made up of the supporting frame 25 of valve seat 22, sealing valve block 23, the spring 24 that the valve block pre-pressing force is provided and supported spring.Valve block is close on the valve seat under the effect of spring force, guarantees the one-way valve reliable sealing.
Fuel filter seat of the present utility model and fuel filter working principle are as follows:
When gland outside the hand pump 5 and diaphragm 7 lift under the effect of pressure spring 8 elastic force, make volume expansion formation vacuum in the pump chamber, fuel-displaced one-way valve 3 is closed, under the atmospheric pressure effect, in line check valve 10 is opened, main one-way valve 11 is closed, air in the element kit 16 when filter cleaner (new) or filtered clean fuel oil are by the filler opening (oil input channel) 12 in the pump housing 13, enter in the pump chamber 21 by the in line check valve of opening 10, simultaneously the fuel oil in the fuel tank is in filler opening 12 replenishes into element kit 16 again; When gland outside the hand pump 5 and diaphragm 7 were depressed, in line check valve 10 was closed, and fuel-displaced one-way valve 3 is opened, and main one-way valve 11 is closed, and the fuel oils in the hand pump chamber 21 are pressed into filler opening 12 to oil outlet by the fuel-displaced one-way valve of opening 3; Repeat like this to press by outer gland 5, the air in the element kit 16 will be squeezed by fuel oil and discharge element kit, and the clean fuel oil behind filter element filtering arrives oil outlet 1 simultaneously.
During hand pump work, fuel flow direction: filler opening 12 → element kit 16 → filter core center tube inner chamber 17 → coupling shaft central oil passage 15 → coupling shaft side 4 oil channel hole 20 → in line check valves, 10 → pump chamber, 21 → fuel-displaced one-way valve 3 → oil outlet 1.
When the filter cleaner of new clothes has been finished exhaust steam turbine and has been in normal working, because motor is to the burning of fuel oil, need constantly there be fuel oil to replenish, this moment fuel oil under the effect of oil transfer pump from fuel tank, oil pipe through filler opening 12 to element kit 16, clean fuel oil after element kit 16 filters arrives main one-way valve 11 through the hand pump filler opening, main one-way valve 11 is under the suction of oil transfer pump, open main one-way valve 11, the main one-way valve 11 of fuel oil process is to oil outlet 1, form continuous oil transportation, continue fuel feeding to motor.
When the motor proper functioning, fuel flow direction: filler opening 12 → element kit 16 → filter core center tube inner chamber 17 → coupling shaft central oil passage 15 → main one-way valve 11 → oil outlet 1.
Fig. 4 shows the fuel filter of another embodiment.This fuel filter comprises fuel filter seat and element kit, and their structure as shown in Figure 1.Though as shown in the figure, fuel filter also comprises heater and level sensor, and the two can not occur simultaneously.
As shown in Figure 4, described heater comprises heater housing 32, heater band 26, heat conduction board 27, and they are compressed by elastic pressuring plate 28, and fastening by Cock screw 29, hollow stud 31 is connected in heater on the coupling shaft 14 of filter cleaner seat and is fixing, and terminal 33 is used to connect socket connector plug.The working principle of heater is as follows: fuel oil arrives heater via filler opening 12, heats the back in heater inside by heater band 26 and heat conduction board 27 and flows out heater, enters element kit.
As shown in Figure 4, described level sensor is connected in the element kit bottom, it is made up of sensor body 34 and float 35, level sensor is connected with element kit lower end internal thread by sensor body 34 outside threads, sensor body top is connected with float, and the water level of being separated by filter core of filter core accumulated inside is monitored.When water level arrives certain position, float is connected sensor body 34 internal magnetization switches under the water level buoyancy function, startup voice guard, optics alarm or the two combination begin to report to the police and discharge water with the notifying operation personnel, discharging valve 36 is threaded onto in sensor body 34 lower internal thread by its external screw-thread, and operation is used for discharging water.In other embodiments, discharging valve can directly be located at the filter tank bottom.
Claims (10)
1. fuel filter seat comprises:
Pedestal, it is provided with filler opening and oil outlet;
Hand pump, the clean side that the fuel oil after its confession that is arranged on described pedestal is filtered via element kit is flowed through, and be provided with in line check valve and fuel-displaced one-way valve;
Main one-way valve, it is installed in the described pedestal,
It is characterized in that, described fuel filter seat also comprises the hollow coupling shaft that removably is tightly connected with described pedestal, described coupling shaft at one end compresses described main one-way valve, and the inside of this coupling shaft forms fuel oil and enters the oil inlet passage of pedestal and be provided with at least one hole that is communicated with the in line check valve fluid at sidewall from the filter core inner chamber of described element kit.
2. fuel filter seat according to claim 1 is characterized in that, described oil-feed and fuel-displaced one-way valve comprise valve seat, seal valve block, the spring of valve block pre-pressing force and the supporting frame of supported spring are provided.
3. fuel filter seat according to claim 1 and 2 is characterized in that, described coupling shaft is provided with four described holes on sidewall.
4. fuel filter seat according to claim 1 and 2 is characterized in that described filler opening and oil outlet are provided with copper sheathing.
5. a fuel filter comprises each described fuel filter seat among element kit and the claim 1-4, and the coupling shaft of described fuel filter seat is threaded with element kit.
6. fuel filter according to claim 5 is characterized in that, the filter core of described filter element part is supported by the turriform spring in the bottom.
7. according to claim 5 or 6 described fuel filters, it is characterized in that, described fuel filter also comprises heater, it is installed between filter cleaner seat and the element kit hermetically, and this heater has the passage that is communicated with the filter core cavity fluid of the oil inlet passage of described coupling shaft and described element kit.
8. fuel filter according to claim 7 is characterized in that, described heater is connected in the coupling shaft and the described element kit of described fuel filter seat by hollow stud.
9. according to claim 5 or 6 described fuel filters, it is characterized in that described fuel filter also comprises the water-level alarm device, it comprises the level sensor of being located at the element kit bottom and the alarm unit that is connected with described level sensor operability.
10. fuel filter according to claim 9 is characterized in that described level sensor comprises sensor body and float, and described sensor body is threaded with the element kit lower end, and described float attaches to the top of described sensor body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206608287U CN201934236U (en) | 2010-12-15 | 2010-12-15 | Fuel filter base and fuel filter comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206608287U CN201934236U (en) | 2010-12-15 | 2010-12-15 | Fuel filter base and fuel filter comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201934236U true CN201934236U (en) | 2011-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206608287U Expired - Lifetime CN201934236U (en) | 2010-12-15 | 2010-12-15 | Fuel filter base and fuel filter comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201934236U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105056618A (en) * | 2015-08-12 | 2015-11-18 | 九江新恒机械制造有限公司 | Oil-water separator |
| CN105317603A (en) * | 2014-07-24 | 2016-02-10 | 上海渝癸德信息技术服务中心 | Fuel oil pump assembly structure |
| CN105736203A (en) * | 2016-04-18 | 2016-07-06 | 临海市江南内燃机附件厂 | Fuel filter assembly for fuel and water separation |
| CN107559115A (en) * | 2017-09-26 | 2018-01-09 | 安徽凤凰滤清器股份有限公司 | Fuel filter and combinations thereof sensor |
| CN107882668A (en) * | 2017-12-28 | 2018-04-06 | 潍柴动力股份有限公司 | A kind of fuel filter seat |
| CN107905929A (en) * | 2017-12-31 | 2018-04-13 | 无锡威孚高科技集团股份有限公司 | A kind of fuel filter of filtration package |
| CN109653919A (en) * | 2018-12-28 | 2019-04-19 | 平原滤清器有限公司 | Non-return thermostat valve and the modularization environment protection-type fuel filter for using non-return thermostat valve |
| CN111075622A (en) * | 2019-12-31 | 2020-04-28 | 汉格斯特滤清系统(昆山)有限公司 | A fuel filter with memory spring |
| CN111997801A (en) * | 2020-08-27 | 2020-11-27 | 蚌埠市万达电子有限公司 | Diesel oil filter water level alarm convenient to installation |
| CN114060189A (en) * | 2021-12-27 | 2022-02-18 | 无锡亿利环保科技有限公司 | Fuel prefilter assembly |
-
2010
- 2010-12-15 CN CN2010206608287U patent/CN201934236U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317603A (en) * | 2014-07-24 | 2016-02-10 | 上海渝癸德信息技术服务中心 | Fuel oil pump assembly structure |
| CN105056618A (en) * | 2015-08-12 | 2015-11-18 | 九江新恒机械制造有限公司 | Oil-water separator |
| CN105736203A (en) * | 2016-04-18 | 2016-07-06 | 临海市江南内燃机附件厂 | Fuel filter assembly for fuel and water separation |
| CN107559115A (en) * | 2017-09-26 | 2018-01-09 | 安徽凤凰滤清器股份有限公司 | Fuel filter and combinations thereof sensor |
| CN107559115B (en) * | 2017-09-26 | 2023-12-26 | 安徽凤凰滤清器股份有限公司 | Fuel filter and combined sensor thereof |
| CN107882668B (en) * | 2017-12-28 | 2023-12-19 | 潍柴动力股份有限公司 | A fuel filter seat |
| CN107882668A (en) * | 2017-12-28 | 2018-04-06 | 潍柴动力股份有限公司 | A kind of fuel filter seat |
| CN107905929A (en) * | 2017-12-31 | 2018-04-13 | 无锡威孚高科技集团股份有限公司 | A kind of fuel filter of filtration package |
| CN109653919A (en) * | 2018-12-28 | 2019-04-19 | 平原滤清器有限公司 | Non-return thermostat valve and the modularization environment protection-type fuel filter for using non-return thermostat valve |
| CN109653919B (en) * | 2018-12-28 | 2024-01-19 | 平原滤清器有限公司 | Check temperature control valve and modularized environment-friendly fuel filter using same |
| CN111075622A (en) * | 2019-12-31 | 2020-04-28 | 汉格斯特滤清系统(昆山)有限公司 | A fuel filter with memory spring |
| CN111997801A (en) * | 2020-08-27 | 2020-11-27 | 蚌埠市万达电子有限公司 | Diesel oil filter water level alarm convenient to installation |
| CN114060189A (en) * | 2021-12-27 | 2022-02-18 | 无锡亿利环保科技有限公司 | Fuel prefilter assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HEFEI WAL FUEL SYSTEM CO., LTD. Free format text: FORMER NAME: WAL FUEL SYETEMS (HEFEI) LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 230601 No. 59 Buddha Road, Hefei economic and Technological Development Zone, Anhui, China Patentee after: Hefei Weir oil-fired system limited company Address before: 230601 No. 59 Buddha Road, Hefei economic and Technological Development Zone, Anhui, China Patentee before: WAL Fuel Syetems (Hefei) Ltd. |
|
| CP03 | Change of name, title or address |
Address after: 230000 No. 59 Buddha Road, Hefei economic and Technological Development Zone, Anhui Patentee after: Anhui Weil Low Carbon Technology Co., Ltd Address before: 230601 No. 59 Buddha Road, Hefei economic and Technological Development Zone, Anhui, China Patentee before: Hefei Weir oil-fired system limited company |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110817 |
|
| CX01 | Expiry of patent term |