CN209942982U - Hand pump fuel prefilter main shell assembly - Google Patents
Hand pump fuel prefilter main shell assembly Download PDFInfo
- Publication number
- CN209942982U CN209942982U CN201920120814.7U CN201920120814U CN209942982U CN 209942982 U CN209942982 U CN 209942982U CN 201920120814 U CN201920120814 U CN 201920120814U CN 209942982 U CN209942982 U CN 209942982U
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- China
- Prior art keywords
- oil outlet
- oil
- main shell
- way valve
- check valve
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- Expired - Fee Related
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 15
- 238000011045 prefiltration Methods 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 97
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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Abstract
The utility model relates to a main shell assembly of a hand pump fuel prefilter, which comprises a main shell, a vertical pipe, an oil inlet arranged in the main shell, an oil outlet system, a check valve group and a pressing device arranged on the side surface of the main shell; the oil outlet system comprises a first oil outlet, a second oil duct, a second oil outlet and a first oil duct which are correspondingly arranged; the pressing device comprises a handle, a diaphragm and an inner lining cover which are sequentially arranged on the main shell from outside to inside; a guide pipe is arranged in the lining cover; the check valve group comprises a first check valve positioned between the second oil duct and the first oil outlet, a second check valve positioned between the diaphragm and the first oil outlet, and a third check valve positioned between the diaphragm and the second oil outlet; an exhaust hole, an exhaust screw and a sealing gasket which are matched with the exhaust hole are arranged on the main shell between the first oil outlet and the second one-way valve. The utility model discloses compact structure guarantees the high-efficient reliability of oil feeding system work, and the maintenance is with low costs simultaneously.
Description
Technical Field
The invention belongs to the technical field of automobile engine prefilters, and particularly relates to a main shell assembly of a hand pump fuel prefilter.
Background
In recent years, due to the stricter emission regulations of vehicle engines, further improvement and improvement of the pre-filter must be caused. The high efficiency and reliability of the oil supply system play an important role in the performance of the engine. Therefore, in order to ensure efficient and reliable operation of the fuel supply system, the structure and function of the fuel prefilter must be more perfected.
Disclosure of Invention
The invention aims to provide a main shell assembly of a hand pump fuel prefilter, which has the advantages of compact structure, high-efficiency and reliability of the work of an oil supply system, simple and convenient operation and low maintenance cost.
In order to achieve the purpose, the technical scheme of the invention comprises a main shell, a vertical pipe vertically arranged in the main shell, an oil inlet arranged in the main shell, an oil outlet system, a check valve group and a pressing device arranged on the side surface of the main shell, wherein the oil inlet is communicated with the oil outlet system;
the oil inlet is positioned above the oil outlet system and the check valve group;
the oil outlet system comprises a first oil outlet and a second oil duct which are positioned on one side of the vertical pipe, and a second oil outlet and a first oil duct which are correspondingly arranged on the other side of the vertical pipe; the oil inlet, the first oil outlet and the second oil outlet are arranged in parallel, and the oil inlet is respectively and vertically arranged with the first oil duct and the second oil duct;
the pressing device comprises a handle, a diaphragm and an inner lining cover which are sequentially arranged on the main shell from outside to inside; a guide pipe is arranged in the lining cover, and the inner wall of the guide pipe is in sliding connection with a guide column on the outer wall of the main shell; springs are sleeved on the peripheries of the guide columns and the guide pipes;
the check valve group comprises a first check valve positioned between the second oil duct and the first oil outlet, a second check valve positioned between the diaphragm and the first oil outlet, and a third check valve positioned between the diaphragm and the second oil outlet;
an exhaust hole, an exhaust screw and a sealing gasket which are matched with the exhaust hole are arranged on the main shell between the first oil outlet and the second one-way valve.
Further, the vertical pipe comprises a connecting pipe and a conduit arranged below the connecting pipe, and the conduit comprises a first channel connected to the bottom of the connecting pipe and a second channel connected to one side of the connecting pipe; the lower part of the first channel is provided with a balance hole which is positioned below the second channel.
Further, a pump chamber is formed between the diaphragm and the main shell;
the first check valve is located between the second oil passage and the second check valve,
the second one-way valve is arranged between the pump cavity and the first oil outlet, the third one-way valve is arranged between the pump cavity and the second oil outlet, and the second oil outlet is positioned between the third one-way valve and the first oil duct;
the second one-way valve and the first one-way valve are arranged in opposite directions, the opening directions of the second one-way valve and the first one-way valve are opposite, and the opening direction of the third one-way valve and the opening direction of the first one-way valve are in the same direction.
Further, the inside below of main casing is provided with the occupy-place box, occupy-place box is located the standpipe below.
Furthermore, the occupation box is a closed shell, two or more bosses are arranged on the periphery of the occupation box, and the occupation box is installed in a matched mode with the inner cavity of the main shell through the bosses.
Further, one side of the first channel and one side of the second channel are arranged in a wall.
Further, a pressure plate is arranged outside the handle, a circle of boss is arranged on the periphery of the end portion of the diaphragm, and the boss is assembled in a sealing groove in the main shell.
Furthermore, the first oil outlet and the second oil outlet are coaxially and symmetrically distributed, and the first oil outlet and the second oil outlet are arranged at intervals.
The invention has the following positive effects:
when the exhaust valve is used, the exhaust screw is opened, the handle is repeatedly pressed, so that gas in the filter sequentially passes through the guide pipe, the first oil duct, the third one-way valve and the second one-way valve to reach the exhaust hole, and then is exhausted out of the filter. When the handle is pressed down, the first one-way valve is closed, the second one-way valve is opened, the third one-way valve is closed, and the gas in the pump cavity is discharged; when the handle is reset by the spring, the first one-way valve and the second one-way valve are closed, the third one-way valve is opened, and air is sucked into the pump cavity, so that the manual oil pumping and exhausting process is realized. When oil in the exhaust hole overflows outwards, the exhaust hole is blocked by using the exhaust screw and the sealing gasket, then the engine is started, after the engine works, the oil delivery pump works to form negative pressure for pumping oil to the first oil outlet, at the moment, the first check valve is opened, gas at the upper end of the filter enters the second oil duct through the connecting pipe, the first channel and the balance hole and then is discharged out of the filter, the pressure in the filter is balanced in real time in the running process of the vehicle, and the vehicle runs more stably and reliably.
Drawings
FIG. 1 is a schematic longitudinal cross-sectional view of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 1 according to the present invention;
FIG. 4 is an enlarged view of portion B of FIG. 1 according to the present invention;
fig. 5 is a schematic view of a placeholder box according to the present invention.
In the attached drawing, a main shell 1, a first oil outlet 1-2, a second oil outlet 1-3, a first oil passage 1-4, a second oil passage 1-5, a guide post 1-6, a seal groove 1-7, a pit 1-8, a shoulder 1-9, an exhaust hole 1-10, a connecting pipe 2, a guide pipe 3, a first passage 3-1, a second passage 3-2, a limiting plate 3-3, a balance hole 3-4, a space occupying box 4, a limiting boss 4-1, a first check valve 5, a second check valve 6, a third check valve 7, a spring 8, a lining cover 9, a guide pipe 9-1, a diaphragm 10, a sealing boss 10-1, a handle 11, a pressure plate 12, a pump cavity 13, an exhaust screw 14 and a sealing gasket 15 are arranged.
Detailed Description
The solution according to the invention will be further elucidated and explained with reference to the drawings.
As shown in fig. 1-5, the present invention includes a main housing 1, a vertical tube vertically disposed in the main housing 1, an oil inlet 1-1 disposed in the main housing 1, an oil outlet system, a check valve set, and a pressing device disposed on a side surface of the main housing 1;
the oil inlet 1-1 is positioned above the oil outlet system and the check valve bank;
the oil outlet system comprises a first oil outlet 1-2 and a second oil channel 1-5 which are positioned on one side of the vertical pipe, and a second oil outlet 1-3 and a first oil channel 1-4 which are correspondingly arranged on the other side of the vertical pipe; the oil inlet 1-1, the first oil outlet 1-2 and the second oil outlet 1-3 are all arranged in parallel, and the oil inlet 1-1 is respectively and vertically arranged with the first oil channel 1-4 and the second oil channel 1-5; the first oil outlet 1-2 and the second oil outlet 1-3 are symmetrically arranged;
the first oil outlet 1-2 and the second oil channel 1-5 are arranged at intervals;
the first oil duct 1-4 and the second oil duct 1-5 are communicated with the vertical pipe;
the pressing device comprises a handle 11, a diaphragm 10 and an inner lining cover 9 which are vertically arranged on the main shell 1 from outside to inside in sequence; the handle 11 is movably arranged on the main shell 1, and the membrane 10 plays a role of sealing.
A guide pipe 9-1 is arranged in the inner liner cover 9, the guide pipe 9-1 is vertically arranged at the center of the inner wall of the inner liner cover 9, the inner wall of the guide pipe 9-1 is in sliding connection with a guide column 1-6 on the outer wall of the main shell 1, the guide pipe 9-1 is sleeved on the outer side of the guide column 1-6, and the guide pipe 9-1 is matched with the guide column 1-6; a spring 8 is sleeved on the peripheries of the guide post 1-6 and the guide pipe 9-1, one end of the spring 8 is connected with the main shell 1, and the other end of the spring 8 is connected with the lining cover 9;
the inner wall of the guide pipe 9-1 is in clearance fit with the guide column 1-6.
The check valve group comprises a first check valve 5 positioned between an outlet of the second oil duct 1-5 and the first oil outlet 1-2, a second check valve 6 positioned between the diaphragm 10 and the first oil outlet 1-2, and a third check valve 7 positioned between the diaphragm 10 and the second oil outlet 1-3; the second one-way valve 6 is located between the diaphragm 10 and the first one-way valve 5;
the first check valve 5, the second check valve 6 and the third check valve 7 are vertically arranged in the main shell 1;
the main shell 1 between the first oil outlet 1-2 and the second one-way valve 6 is provided with exhaust holes 1-10, exhaust screws 14 and sealing gaskets 15, the exhaust holes 1-10 are matched with the exhaust holes 1-10, the exhaust screws 14 are used for blocking the exhaust holes 1-10, and the sealing gaskets 15 are arranged between the exhaust screws 14 and the exhaust holes 1-10 to play a role in sealing.
Further, the vertical pipe comprises a connecting pipe 2 and a conduit 3 arranged below the connecting pipe 2, and a clamping groove used for being connected with the conduit 3 is arranged in the lower end of the connecting pipe 2. The connecting pipe 2 is connected with the conduit 3 in a buckling mode, and the conduit 3 comprises a first channel 3-1 connected to the bottom of the connecting pipe 2 and a second channel 3-2 connected to one side of the connecting pipe 2; the lower part of the first channel 3-1 is provided with a balancing hole 3-4, and the balancing hole 3-4 is positioned below the second channel 3-2. One side of the balance hole 3-4 is arranged in the first channel 3-1, and the other side of the balance hole 3-4 is communicated with the second channel 3-2, the first oil channel 1-4 and the second oil channel 1-5 through the main shell 1.
The second channel 3-2 is communicated with the first oil channel 1-4 and the second oil channel 1-5 through the main shell 1;
the bottom of the second channel 3-2 is provided with a limiting piece 3-3, and the limiting piece 3-3 can enable the guide pipe 3 to be matched with the shoulder 1-9 to carry out axial limiting when the guide pipe is installed downwards.
The connection pipe 2 is an upward extending pipe of the first passage 3-1, and the connection pipe 2 is vertically disposed at a central position of the main casing 1.
The bottom of the first channel 3-1 is fixed with the concave pits 1-8 on the main shell 1 in an interference fit manner, and further, a pump cavity 13 is formed between the diaphragm 10 and the main shell 1;
the first check valve 5 is located between the second oil passage 1-5 and the second check valve 6,
the second one-way valve 6 is arranged between the pump cavity 13 and the first oil outlet 1-2, the third one-way valve 7 is arranged between the pump cavity 13 and the second oil outlet 1-3, and the second oil outlet 1-3 is positioned between the third one-way valve 7 and the first oil passage 1-4;
the second one-way valve 6 and the first one-way valve 5 are arranged in opposite directions, the opening directions of the second one-way valve and the first one-way valve are opposite, and the opening direction of the third one-way valve 7 is the same as that of the first one-way valve 5.
The first one-way valve 5 is opened towards the handle 11 and is cut off towards the direction of the guide pipe 3; further, a space occupying box 4 is arranged in the main shell 1 at the lower part, and the space occupying box 4 is positioned below the vertical pipe.
Furthermore, occupy-place box 4 is for the confined casing, and occupy-place box 4 periphery is provided with two or more than two spacing bosss 4-1, occupy-place box 4 passes through spacing boss 4-1 and the cooperation installation of main casing body 1 inner chamber, make occupy-place box 4 form the axial spacing. The occupying box 4 can play the occupying role, thereby reducing the internal volume of the filter, reducing the exhaust volume and reducing the exhaust times. The space occupying box is used for reducing the volume of the lower part of the main shell, so that the gas to be discharged is reduced, the gas discharge amount can be reduced, the gas discharge frequency is reduced, the volume in the main shell is small, the contained gas is reduced, the gas to be discharged is further reduced, and the gas discharge frequency is reduced.
Further, the first channel 3-1 and the second channel 3-2 are eccentrically arranged, and one side of the first channel 3-1 and one side of the second channel 3-2 are arranged in a same wall.
Further, a pressure plate 12 is arranged outside the handle 11, and after the lining cover 9, the diaphragm 10, the handle 11 and the pressure plate 12 are sequentially assembled, the main shell 1 is fixedly connected with three or more bolts.
The periphery of the end part of the diaphragm 10 is provided with a circle of sealing bosses 10-1, the sealing bosses 10-1 are assembled in sealing grooves 1-7 on the main shell 1 and are compressed by a pressure plate 12 to form pressure sealing.
The compression of the pressure plate 12 is achieved by means of two or more bolts.
Further, the first oil outlet 1-2 and the second oil outlet 1-3 are coaxially and symmetrically distributed, and the first oil outlet 1-2 and the second oil outlet 1-3 are arranged at intervals.
Before the new filter is used, part of internal gas needs to be removed, the gas is discharged, meanwhile, fuel oil is pumped into the filter, negative pressure is generated inside the filter after the gas flows out, the suction force acts on the oil inlet after passing through the filter element, the oil inlet can suck the oil through an oil pipe connected with an oil tank to reach the filter, and the air in the filter can be effectively discharged by using the invention. When the air-exhausting valve is used, the air-exhausting screw 14 is firstly opened to enable the first oil outlet 1-2 to be communicated with the atmosphere, then the handle 11 is repeatedly pressed to exhaust air, specifically, when the handle 11 is pressed, the first one-way valve 5 is closed, the second one-way valve 6 is opened, the third one-way valve 7 is closed, the handle 11 moves inwards under the pressure action of hands to enable the volume of the pump cavity 13 to be reduced, and air in the pump cavity 13 is exhausted from the air exhaust holes 1-10 sequentially through the second one-way valve 6; when the handle 11 is reset by the spring 8, negative pressure suction force is formed on the three single valves at the same time, the opening and closing states of the three single valves are adjusted, the opening of the single valves is determined to be opened or closed according to the thrust or suction force borne by the single valves, specifically, the first one-way valve 5 is closed, the second one-way valve 6 is closed, the third one-way valve 7 is opened, and air is sucked into the pump cavity 13 from the second channel 3-2, the first oil channel 1-4 and the third one-way valve 7, so that the manual oil pumping and exhausting process is realized. Whether the first channel 3-1 has gas or oil coming through the balancing hole 3-4 depends on the suction force to which the balancing hole 3-4 is subjected, if the second channel 3-2 of the duct 3 can completely compensate the spring 8 reset or the suction force to the filter outlet when the vehicle is working, no gas is left in the balancing hole, otherwise gas flows out. When oil overflows from the exhaust holes 1-10, the exhaust holes 1-10 are plugged by using the exhaust screws 14 and the sealing gaskets 15, then the engine is started, after the engine works, the oil delivery pump works to form negative pressure for pumping oil to the first oil outlet 1-2, at the moment, the first one-way valve 5 is opened, gas at the upper end of the filter enters the second oil duct 1-5 through the connecting pipe 2, the first channel 3-1 and the balance holes 3-4 and then is discharged out of the filter, and the pressure in the filter is balanced in real time in the running process of the vehicle, so that the vehicle runs more stably and reliably.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A hand pump fuel prefilter main housing assembly characterized by: the oil outlet device comprises a main shell (1), a vertical pipe vertically arranged in the main shell (1), an oil inlet (1-1) arranged in the main shell (1), an oil outlet system, a check valve group and a pressing device arranged on the side surface of the main shell (1);
the oil inlet (1-1) is positioned above the oil outlet system and the check valve bank;
the oil outlet system comprises a first oil outlet (1-2) and a second oil channel (1-5) which are positioned on one side of the vertical pipe, and a second oil outlet (1-3) and a first oil channel (1-4) which are correspondingly arranged on the other side of the vertical pipe; the oil inlet (1-1), the first oil outlet (1-2) and the second oil outlet (1-3) are all arranged in parallel, and the oil inlet (1-1) is respectively and vertically arranged with the first oil duct (1-4) and the second oil duct (1-5);
the pressing device comprises a handle (11), a diaphragm (10) and an inner lining cover (9) which are sequentially arranged on the main shell (1) from outside to inside; a guide pipe (9-1) is arranged in the lining cover (9), and the inner wall of the guide pipe (9-1) is in sliding connection with a guide column (1-6) on the outer wall of the main shell (1); springs (8) are sleeved on the peripheries of the guide columns (1-6) and the guide pipes (9-1);
the check valve group comprises a first check valve (5) positioned between the second oil duct (1-5) and the first oil outlet (1-2), a second check valve (6) positioned between the diaphragm (10) and the first oil outlet (1-2), and a third check valve (7) positioned between the diaphragm (10) and the second oil outlet (1-3);
the main shell (1) between the first oil outlet (1-2) and the second one-way valve (6) is provided with exhaust holes (1-10), exhaust screws (14) matched with the exhaust holes (1-10) and a sealing gasket (15).
2. A hand pump fuel pre-filter main housing assembly as claimed in claim 1, wherein: the vertical pipe comprises a connecting pipe (2) and a conduit (3) arranged below the connecting pipe (2), the conduit (3) comprises a first channel (3-1) connected to the bottom of the connecting pipe (2) and a second channel (3-2) connected to one side of the connecting pipe (2); the lower part of the first channel (3-1) is provided with a balance hole (3-4), and the balance hole (3-4) is positioned below the second channel (3-2).
3. A hand pump fuel pre-filter main housing assembly as claimed in claim 1, wherein: a pump cavity (13) is formed between the diaphragm (10) and the main shell (1);
the first check valve (5) is positioned between the second oil duct (1-5) and the second check valve (6),
the second one-way valve (6) is arranged between the pump cavity (13) and the first oil outlet (1-2), the third one-way valve (7) is arranged between the pump cavity (13) and the second oil outlet (1-3), and the second oil outlet (1-3) is positioned between the third one-way valve (7) and the first oil duct (1-4);
the second one-way valve (6) and the first one-way valve (5) are arranged in opposite directions, the opening directions of the second one-way valve and the first one-way valve are opposite, and the opening direction of the third one-way valve (7) and the opening direction of the first one-way valve (5) are the same.
4. A hand pump fuel pre-filter main housing assembly as claimed in claim 1, wherein: main casing body (1) inside below is provided with occupy-place box (4), occupy-place box (4) are located the standpipe below.
5. A hand pump fuel pre-filter main housing assembly as claimed in claim 4, wherein: the occupying box (4) is a closed shell, two or more bosses (4-1) are arranged on the periphery of the occupying box (4), and the occupying box (4) is installed in a matched mode with the inner cavity of the main shell (1) through the bosses (4-1).
6. A hand pump fuel pre-filter main housing assembly as claimed in claim 2, wherein: one side of the first channel (3-1) and one side of the second channel (3-2) are arranged in a wall-sharing way.
7. A hand pump fuel pre-filter main housing assembly as claimed in claim 1, wherein: a pressure plate (12) is arranged outside the handle (11), a circle of boss (10-1) is arranged on the periphery of the end part of the diaphragm (10), and the boss (10-1) is assembled in a sealing groove (1-7) on the main shell (1).
8. A hand pump fuel pre-filter main housing assembly as claimed in claim 1, wherein: the first oil outlet (1-2) and the second oil outlet (1-3) are coaxially and symmetrically distributed, and the first oil outlet (1-2) and the second oil outlet (1-3) are arranged at intervals.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921657320.9U CN210977727U (en) | 2019-01-24 | 2019-01-24 | Standpipe for fuel prefilter |
| CN201920120814.7U CN209942982U (en) | 2019-01-24 | 2019-01-24 | Hand pump fuel prefilter main shell assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920120814.7U CN209942982U (en) | 2019-01-24 | 2019-01-24 | Hand pump fuel prefilter main shell assembly |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921657320.9U Division CN210977727U (en) | 2019-01-24 | 2019-01-24 | Standpipe for fuel prefilter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209942982U true CN209942982U (en) | 2020-01-14 |
Family
ID=69121609
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920120814.7U Expired - Fee Related CN209942982U (en) | 2019-01-24 | 2019-01-24 | Hand pump fuel prefilter main shell assembly |
| CN201921657320.9U Expired - Fee Related CN210977727U (en) | 2019-01-24 | 2019-01-24 | Standpipe for fuel prefilter |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921657320.9U Expired - Fee Related CN210977727U (en) | 2019-01-24 | 2019-01-24 | Standpipe for fuel prefilter |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN209942982U (en) |
-
2019
- 2019-01-24 CN CN201920120814.7U patent/CN209942982U/en not_active Expired - Fee Related
- 2019-01-24 CN CN201921657320.9U patent/CN210977727U/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN210977727U (en) | 2020-07-10 |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 054801 north of Zhigong Avenue and west of Jiuhuashan Road, Qinghe County, Xingtai City, Hebei Province Patentee after: Hebei Yili Technology Co.,Ltd. Address before: 054800 Hebei hundred million sharp rubber and plastic Group Co., Ltd of No. 27, new century street, Xingtai City Qinghe County, Hebei province Patentee before: HEBEI YILI GROUP Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200114 |
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| CF01 | Termination of patent right due to non-payment of annual fee |