CN218046859U - An oil filter element with a sealing structure - Google Patents

An oil filter element with a sealing structure Download PDF

Info

Publication number
CN218046859U
CN218046859U CN202220855413.8U CN202220855413U CN218046859U CN 218046859 U CN218046859 U CN 218046859U CN 202220855413 U CN202220855413 U CN 202220855413U CN 218046859 U CN218046859 U CN 218046859U
Authority
CN
China
Prior art keywords
filter element
oil
fixed
filter core
end cover
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 - Fee Related
Application number
CN202220855413.8U
Other languages
Chinese (zh)
Inventor
魏传亮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tianjin Dingxin Hengxin Technology Co ltd
Original Assignee
Tianjin Dingxin Hengxin Technology Co ltd
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
Publication date
Application filed by Tianjin Dingxin Hengxin Technology Co ltd filed Critical Tianjin Dingxin Hengxin Technology Co ltd
Priority to CN202220855413.8U priority Critical patent/CN218046859U/en
Application granted granted Critical
Publication of CN218046859U publication Critical patent/CN218046859U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Abstract

本实用新型公开了一种设有密封结构的油滤芯,包括滤芯外壳,所述滤芯外壳的顶部连接有进油接头,且滤芯外壳的底部连接有出油接头,所述滤芯外壳的顶部螺纹连接有上盖板,且滤芯外壳的外表面套设有防松动机构,所述上盖板与滤芯外壳之间连接有密封垫,所述滤芯外壳的内部靠近顶部位置设置有上端盖,且滤芯外壳的内部靠近底部位置设置有下端盖,所述上端盖与下端盖之间连接有中心管,所述中心管的外侧套设有滤纸套,所述滤芯外壳与上端盖之间连接有抖动机构;本实用新型所述的一种设有密封结构的油滤芯,能够防止油滤芯安装后出现松动的情况,且能够在油滤芯过滤时进行抖动,从而能够提高油滤芯过滤的工作效率。

Figure 202220855413

The utility model discloses an oil filter element with a sealing structure, which comprises a filter element shell, the top of the filter element shell is connected with an oil inlet joint, and the bottom of the filter element shell is connected with an oil outlet joint, and the top of the filter element shell is threaded. There is an upper cover plate, and the outer surface of the filter element shell is provided with an anti-loosening mechanism, a sealing gasket is connected between the upper cover plate and the filter element shell, and an upper end cover is provided near the top of the filter element shell, and the filter element shell A lower end cover is provided near the bottom of the inside of the filter, a central tube is connected between the upper end cover and the lower end cover, a filter paper sleeve is set on the outer side of the central tube, and a shaking mechanism is connected between the filter element shell and the upper end cover; The oil filter element with a sealing structure described in the utility model can prevent the oil filter element from loosening after installation, and can shake when the oil filter element is filtering, thereby improving the working efficiency of the oil filter element.

Figure 202220855413

Description

一种设有密封结构的油滤芯An oil filter element with a sealing structure

技术领域technical field

本实用新型涉及油滤芯领域,特别涉及一种设有密封结构的油滤芯。The utility model relates to the field of oil filter elements, in particular to an oil filter element with a sealing structure.

背景技术Background technique

油滤芯主要用于液压系统中油品的过滤,安装在液压系统中的过滤器及滤油机中,在液压系统的油路中用于清除液压系统中各元件磨损的金属粉末及其它机械杂质使油路保持清洁,可延长液压系统寿命,低压系列滤芯还设有旁通阀,当滤芯未及时更换时,旁通阀能自动打开,保证系统正常运转,设有密封结构的油滤芯是一种密封效果好的油滤芯,本方案具体涉及一种设有密封结构的油滤芯;但是现有的油滤芯在使用时存在着一定的不足之处有待改善,首先,油滤芯安装后容易出现松动的情况,油滤芯安装后的相对稳定性较差,其次,不能够在油滤芯过滤时进行抖动,油滤芯过滤的工作效率较差。The oil filter element is mainly used for filtering oil in the hydraulic system. It is installed in the filter and oil filter unit in the hydraulic system. It is used in the oil circuit of the hydraulic system to remove metal powder and other mechanical impurities worn by various components in the hydraulic system. Keeping the oil circuit clean can prolong the life of the hydraulic system. The low-pressure series filter element is also equipped with a bypass valve. When the filter element is not replaced in time, the bypass valve can be opened automatically to ensure the normal operation of the system. The oil filter element with a sealing structure is a Oil filter element with good sealing effect. This proposal specifically relates to an oil filter element with a sealing structure; In some cases, the relative stability of the oil filter element after installation is poor. Secondly, it cannot shake when the oil filter element is filtered, and the working efficiency of the oil filter element is poor.

实用新型内容Utility model content

本实用新型的主要目的在于提供一种设有密封结构的油滤芯,可以有效解决背景技术提出的技术问题。The main purpose of the utility model is to provide an oil filter element with a sealing structure, which can effectively solve the technical problems raised by the background technology.

为实现上述目的,本实用新型采取的技术方案为:In order to achieve the above object, the technical scheme that the utility model takes is:

一种设有密封结构的油滤芯,包括滤芯外壳,所述滤芯外壳的顶部连接有进油接头,且滤芯外壳的底部连接有出油接头,所述滤芯外壳的顶部螺纹连接有上盖板,且滤芯外壳的外表面套设有防松动机构,所述上盖板与滤芯外壳之间连接有密封垫,所述滤芯外壳的内部靠近顶部位置设置有上端盖,且滤芯外壳的内部靠近底部位置设置有下端盖,所述上端盖与下端盖之间连接有中心管,所述中心管的外侧套设有滤纸套,所述滤芯外壳与上端盖之间连接有抖动机构。An oil filter element with a sealing structure, comprising a filter element housing, the top of the filter element housing is connected with an oil inlet joint, and the bottom of the filter element housing is connected with an oil outlet joint, and the top of the filter element housing is threadedly connected with an upper cover plate, And the outer surface of the filter element shell is covered with an anti-loosening mechanism, a sealing gasket is connected between the upper cover plate and the filter element shell, the inside of the filter element shell is provided with an upper end cover near the top, and the inside of the filter element shell is close to the bottom position A lower end cover is provided, a central tube is connected between the upper end cover and the lower end cover, a filter paper sleeve is set on the outer side of the central tube, and a shaking mechanism is connected between the filter element shell and the upper end cover.

作为本实用新型的进一步方案,所述防松动机构包括限位座、角型座、固定销、限位挡块和限位槽,所述限位座套设在滤芯外壳的外表面,所述角型座固定于限位座的外表面,所述固定销贯穿于角型座的内部,所述限位挡块固定于滤芯外壳的外表面,所述限位槽开设在限位座的内部。As a further solution of the present utility model, the anti-loosening mechanism includes a limit seat, an angle seat, a fixed pin, a limit block and a limit groove, and the limit seat is sleeved on the outer surface of the filter element shell, and the The angle seat is fixed on the outer surface of the limit seat, the fixed pin penetrates the inside of the angle seat, the limit block is fixed on the outer surface of the filter element shell, and the limit groove is set inside the limit seat .

作为本实用新型的进一步方案,所述限位座通过限位挡块卡入限位槽与滤芯外壳卡合连接。As a further solution of the present invention, the limit seat is snapped into the limit slot by the limit block and connected with the filter element shell.

作为本实用新型的进一步方案,所述抖动机构包括承托板、连接柱、升降柱、衔接头和伸缩弹簧,所述承托板固定于滤芯外壳的内表面,所述连接柱固定于承托板的上表面,所述升降柱的底端延伸至连接柱的内部,且升降柱的顶端固定于上端盖的外表面,所述衔接头固定于升降柱的底端,所述伸缩弹簧的一端固定于衔接头的外表面,且伸缩弹簧的另一端固定于连接柱的内表面。As a further solution of the present utility model, the shaking mechanism includes a supporting plate, a connecting column, a lifting column, an adapter and a telescopic spring, the supporting plate is fixed on the inner surface of the filter element shell, and the connecting column is fixed on the supporting The upper surface of the plate, the bottom end of the lifting column extends to the inside of the connecting column, and the top end of the lifting column is fixed on the outer surface of the upper end cover, the joint is fixed on the bottom end of the lifting column, and one end of the telescopic spring It is fixed on the outer surface of the connector, and the other end of the telescopic spring is fixed on the inner surface of the connecting column.

作为本实用新型的进一步方案,所述升降柱通过衔接头和伸缩弹簧与连接柱活动连接。As a further solution of the present utility model, the lifting column is movably connected with the connecting column through an adapter and a telescopic spring.

作为本实用新型的进一步方案,所述上端盖和下端盖的外表面均连接有油路通道。As a further solution of the present utility model, the outer surfaces of the upper end cover and the lower end cover are connected with oil passages.

与现有技术相比,本实用新型具有如下有益效果:通过设置的防松动机构,能够防止油滤芯安装后出现松动的情况,从而能够提高油滤芯安装后的相对稳定性,通过设置的抖动机构,能够在油滤芯过滤时进行抖动,从而能够提高油滤芯过滤的工作效率。Compared with the prior art, the utility model has the following beneficial effects: the installed anti-loosening mechanism can prevent the oil filter element from loosening after installation, thereby improving the relative stability of the oil filter element after installation; , can shake when the oil filter element is filtered, thereby improving the working efficiency of the oil filter element.

附图说明Description of drawings

图1为本实用新型一种设有密封结构的油滤芯的整体结构示意图;Figure 1 is a schematic diagram of the overall structure of an oil filter element provided with a sealing structure of the present invention;

图2为本实用新型一种设有密封结构的油滤芯的滤芯外壳的内部结构示意图;Fig. 2 is a schematic diagram of the internal structure of a filter housing of an oil filter with a sealing structure according to the present invention;

图3为本实用新型一种设有密封结构的油滤芯的防松动机构的结构示意图;Fig. 3 is a structural schematic diagram of an anti-loosening mechanism of an oil filter element provided with a sealing structure in the present invention;

图4为本实用新型一种设有密封结构的油滤芯的抖动机构的结构示意图。Fig. 4 is a structural schematic diagram of a shaking mechanism of an oil filter element provided with a sealing structure according to the present invention.

图中:1、滤芯外壳;2、进油接头;3、出油接头;4、上盖板;5、防松动机构;501、限位座;502、角型座;503、固定销;504、限位挡块;505、限位槽;6、密封垫;7、上端盖;8、下端盖;9、中心管;10、滤纸套;11、抖动机构;1101、承托板;1102、连接柱;1103、升降柱;1104、衔接头;1105、伸缩弹簧。In the figure: 1. Filter element housing; 2. Oil inlet joint; 3. Oil outlet joint; 4. Upper cover plate; 5. Anti-loosening mechanism; 501. Limit seat; 502. Angle seat; , limit block; 505, limit groove; 6, gasket; 7, upper end cover; 8, lower end cover; 9, center tube; 10, filter paper sleeve; 11, shaking mechanism; Connecting column; 1103, lifting column; 1104, connecting head; 1105, telescopic spring.

具体实施方式detailed description

为使本实用新型实现的技术手段、创作特征、达成目的与功效易于明白了解,下面结合具体实施方式,进一步阐述本实用新型。In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific embodiments.

如图1-4所示,一种设有密封结构的油滤芯,包括滤芯外壳1,滤芯外壳1的顶部连接有进油接头2,且滤芯外壳1的底部连接有出油接头3,滤芯外壳1的顶部螺纹连接有上盖板4,且滤芯外壳1的外表面套设有防松动机构5,上盖板4与滤芯外壳1之间连接有密封垫6,滤芯外壳1的内部靠近顶部位置设置有上端盖7,且滤芯外壳1的内部靠近底部位置设置有下端盖8,上端盖7与下端盖8之间连接有中心管9,中心管9的外侧套设有滤纸套10,滤芯外壳1与上端盖7之间连接有抖动机构11;As shown in Figure 1-4, an oil filter element with a sealing structure includes a filter element housing 1, an oil inlet joint 2 is connected to the top of the filter element housing 1, and an oil outlet joint 3 is connected to the bottom of the filter element housing 1. The top of 1 is threadedly connected with an upper cover plate 4, and the outer surface of the filter element shell 1 is provided with an anti-loosening mechanism 5, and a gasket 6 is connected between the upper cover plate 4 and the filter element shell 1, and the inside of the filter element shell 1 is close to the top position An upper end cover 7 is provided, and a lower end cover 8 is provided inside the filter element shell 1 near the bottom, a central tube 9 is connected between the upper end cover 7 and the lower end cover 8, and a filter paper sleeve 10 is set on the outer side of the central tube 9, and the filter element shell A shaking mechanism 11 is connected between 1 and the upper end cover 7;

在本实施例中,为了能够防止油滤芯安装后出现松动的情况设置了防松动机构5,防松动机构5包括限位座501、角型座502、固定销503、限位挡块504和限位槽505,限位座501套设在滤芯外壳1的外表面,角型座502固定于限位座501的外表面,固定销503贯穿于角型座502的内部,限位挡块504固定于滤芯外壳1的外表面,限位槽505开设在限位座501的内部,防松动机构5能够防止油滤芯安装后出现松动的情况,从而能够提高油滤芯安装后的相对稳定性。In this embodiment, an anti-loosening mechanism 5 is provided in order to prevent the oil filter element from loosening after installation. The position groove 505, the limit seat 501 is set on the outer surface of the filter element housing 1, the angle seat 502 is fixed on the outer surface of the limit seat 501, the fixing pin 503 penetrates the inside of the angle seat 502, and the limit block 504 is fixed On the outer surface of the filter element housing 1, the limit groove 505 is set inside the limit seat 501, and the anti-loosening mechanism 5 can prevent the oil filter element from loosening after installation, thereby improving the relative stability of the oil filter element after installation.

在本实施例中,为了实现限位座501对滤芯外壳1进行限位,限位座501通过限位挡块504卡入限位槽505与滤芯外壳1卡合连接。In this embodiment, in order to realize the limit seat 501 to limit the filter element housing 1 , the limit seat 501 snaps into the limit groove 505 through the limit block 504 and is engaged with the filter element shell 1 .

在本实施例中,为了能够在油滤芯过滤时进行抖动设置了抖动机构11,抖动机构11包括承托板1101、连接柱1102、升降柱1103、衔接头1104和伸缩弹簧1105,承托板1101固定于滤芯外壳1的内表面,连接柱1102固定于承托板1101的上表面,升降柱1103的底端延伸至连接柱1102的内部,且升降柱1103的顶端固定于上端盖7的外表面,衔接头1104固定于升降柱1103的底端,伸缩弹簧1105的一端固定于衔接头1104的外表面,且伸缩弹簧1105的另一端固定于连接柱1102的内表面,抖动机构11能够在油滤芯过滤时进行抖动,从而能够提高油滤芯过滤的工作效率。In this embodiment, in order to be able to vibrate when the oil filter element is filtered, a shaking mechanism 11 is provided. The shaking mechanism 11 includes a supporting plate 1101, a connecting column 1102, a lifting column 1103, an adapter 1104 and a telescopic spring 1105. The supporting plate 1101 Fixed on the inner surface of the filter housing 1, the connecting column 1102 is fixed on the upper surface of the supporting plate 1101, the bottom end of the lifting column 1103 extends to the inside of the connecting column 1102, and the top end of the lifting column 1103 is fixed on the outer surface of the upper end cover 7 , the adapter 1104 is fixed on the bottom of the lifting column 1103, one end of the telescopic spring 1105 is fixed on the outer surface of the adapter 1104, and the other end of the telescopic spring 1105 is fixed on the inner surface of the connecting column 1102, the shaking mechanism 11 can Vibration is performed during filtering, which can improve the working efficiency of oil filter element filtration.

在本实施例中,为了实现升降柱1103在垂直方向进行抖动,升降柱1103通过衔接头1104和伸缩弹簧1105与连接柱1102活动连接,升降柱1103在垂直方向进行抖动能够带动过滤组件进行抖动。In this embodiment, in order to shake the lifting column 1103 in the vertical direction, the lifting column 1103 is movably connected to the connecting column 1102 through the joint 1104 and the telescopic spring 1105, and the shaking of the lifting column 1103 in the vertical direction can drive the filter assembly to shake.

在本实施例中,上端盖7和下端盖8的外表面均连接有油路通道,油路通道能够方便进油和出油。In this embodiment, the outer surfaces of the upper end cover 7 and the lower end cover 8 are connected with oil passages, and the oil passages can facilitate oil inlet and outlet.

需要说明的是,本实用新型为一种设有密封结构的油滤芯,在使用时,滤芯外壳1构成了整个设有密封结构的油滤芯的主体部分,进油接头2和出油接头3用于油滤芯进行进油和出油,通过角型座502和固定销503对限位座501进行固定,限位座501通过限位挡块504卡入限位槽505与滤芯外壳1进行卡合,能够防止油滤芯安装后出现松动的情况,从而能够提高油滤芯安装后的相对稳定性,油品从进油接头2进入到滤芯外壳1内部的中心管9内,再从中心管9表面的过滤孔进入到滤纸套10内,经过过滤后从出油接头3排出,升降柱1103通过衔接头1104和伸缩弹簧1105与连接柱1102相对活动,升降柱1103在垂直方向进行抖动能够带动过滤组件进行抖动,能够在油滤芯过滤时进行抖动,从而能够提高油滤芯过滤的工作效率。It should be noted that the utility model is an oil filter element with a sealing structure. When in use, the filter element housing 1 constitutes the main part of the entire oil filter element with a sealing structure, and the oil inlet joint 2 and the oil outlet joint 3 are used. The oil filter element is used for oil inlet and outlet, and the limit seat 501 is fixed by the angle seat 502 and the fixed pin 503, and the limit seat 501 is snapped into the limit groove 505 through the limit block 504 to engage with the filter element housing 1 , can prevent the loosening of the oil filter element after installation, thereby improving the relative stability of the oil filter element after installation. The filter hole enters the filter paper sleeve 10 and is discharged from the oil outlet joint 3 after being filtered. The lifting column 1103 moves relative to the connecting column 1102 through the joint 1104 and the telescopic spring 1105, and the vertical vibration of the lifting column 1103 can drive the filter assembly to carry out Vibration can be performed when the oil filter element is filtered, so that the working efficiency of the oil filter element can be improved.

以上显示和描述了本实用新型的基本原理和主要特征和本实用新型的优点。本行业的技术人员应该了解,本实用新型不受上述实施例的限制,上述实施例和说明书中描述的只是说明本实用新型的原理,在不脱离本实用新型精神和范围的前提下,本实用新型还会有各种变化和改进,这些变化和改进都落入要求保护的本实用新型范围内。本实用新型要求保护范围由所附的权利要求书及其等效物界定。The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (6)

1. The utility model provides an oil filter core with seal structure which characterized in that: including filter core shell (1), the top of filter core shell (1) is connected with oil feed joint (2), and the bottom of filter core shell (1) is connected with out oil joint (3), the top threaded connection of filter core shell (1) has upper cover plate (4), and the surface cover of filter core shell (1) is equipped with locking mechanism (5), be connected with sealed pad (6) between upper cover plate (4) and filter core shell (1), the inside of filter core shell (1) is close to the top position and is provided with upper end cover (7), and the inside of filter core shell (1) is close to the bottom position and is provided with lower end cover (8), be connected with center tube (9) between upper end cover (7) and lower end cover (8), the outside cover of center tube (9) is equipped with filter paper cover (10), be connected with shake mechanism (11) between filter core shell (1) and upper end cover (7).
2. An oil filter cartridge provided with a sealing structure according to claim 1, wherein: locking mechanism (5) of moving includes spacing seat (501), angle type seat (502), fixed pin (503), limit stop (504) and spacing groove (505), the surface at filter core shell (1) is established in spacing seat (501) cover, the surface at spacing seat (501) is fixed in angle type seat (502), fixed pin (503) run through in the inside of angle type seat (502), limit stop (504) are fixed in the surface of filter core shell (1), the inside at spacing seat (501) is seted up in spacing groove (505).
3. An oil filter cartridge provided with a sealing structure according to claim 2, wherein: the limiting seat (501) is clamped into the limiting groove (505) through a limiting stop (504) and is connected with the filter element shell (1) in a clamping manner.
4. An oil filter cartridge provided with a sealing structure according to claim 1, wherein: the shake mechanism (11) comprises a supporting plate (1101), a connecting column (1102), a lifting column (1103), an adapter head (1104) and a telescopic spring (1105), wherein the supporting plate (1101) is fixed on the inner surface of the filter element shell (1), the connecting column (1102) is fixed on the upper surface of the supporting plate (1101), the bottom end of the lifting column (1103) extends to the inside of the connecting column (1102), the top end of the lifting column (1103) is fixed on the outer surface of the upper end cover (7), the adapter head (1104) is fixed on the bottom end of the lifting column (1103), one end of the telescopic spring (1105) is fixed on the outer surface of the adapter head (1104), and the other end of the telescopic spring (1105) is fixed on the inner surface of the connecting column (1102).
5. An oil filter cartridge provided with a sealing structure according to claim 4, wherein: the lifting column (1103) is movably connected with the connecting column (1102) through a connecting head (1104) and a telescopic spring (1105).
6. An oil filter cartridge provided with a seal structure according to claim 1, wherein: the outer surfaces of the upper end cover (7) and the lower end cover (8) are connected with oil channels.
CN202220855413.8U 2022-04-12 2022-04-12 An oil filter element with a sealing structure Expired - Fee Related CN218046859U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202220855413.8U CN218046859U (en) 2022-04-12 2022-04-12 An oil filter element with a sealing structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220855413.8U CN218046859U (en) 2022-04-12 2022-04-12 An oil filter element with a sealing structure

Publications (1)

Publication Number Publication Date
CN218046859U true CN218046859U (en) 2022-12-16

Family

ID=84416886

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202220855413.8U Expired - Fee Related CN218046859U (en) 2022-04-12 2022-04-12 An oil filter element with a sealing structure

Country Status (1)

Country Link
CN (1) CN218046859U (en)

Similar Documents

Publication Publication Date Title
CN202700217U (en) Filter for purified water cooling system
CN211058928U (en) a filter
CN209324466U (en) A kind of oil filter
CN208732800U (en) A kind of filter device
CN214303996U (en) Filter core and machine oil filter group with bypass valve
CN215213640U (en) Oil filter of excavator
CN220646365U (en) Oil guide connecting seat structure of oil filter
CN211462282U (en) Large-flux single-core precision filter
CN102784505B (en) Filter for pure water cooling system
CN213063703U (en) Oil filter
CN213743771U (en) Combined gasoline filter element convenient to clean
CN210699022U (en) Filter suitable for online analytical instrument
CN223215342U (en) Combined filter cartridge
CN210049943U (en) Oil filter
CN216259453U (en) Efficient optical photoelectric material cleaning agent filtering device
CN218653260U (en) An oil suction filter device
CN216366800U (en) Filter element mounting mechanism of ink filter
CN222716966U (en) Oil filter with built-in magnetic attraction structure
CN219492363U (en) Oil filter with multi-layer filtering mechanism
CN210033673U (en) An air filter for improving the sealing performance of filter element and outer protective shell
CN210949374U (en) Novel oil filter
CN222173384U (en) Straight cylinder filter
CN221896718U (en) An electric integrated filter assembly
CN224150660U (en) An oil can with a built-in straight-through spin-on oil filter
CN221637521U (en) Filter for multi-channel water outlet

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20221216