CN217220635U - Environment-friendly light oxygen exhaust-gas treatment equipment - Google Patents

Environment-friendly light oxygen exhaust-gas treatment equipment Download PDF

Info

Publication number
CN217220635U
CN217220635U CN202123409441.1U CN202123409441U CN217220635U CN 217220635 U CN217220635 U CN 217220635U CN 202123409441 U CN202123409441 U CN 202123409441U CN 217220635 U CN217220635 U CN 217220635U
Authority
CN
China
Prior art keywords
filter screen
gas treatment
treatment equipment
installation
environment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202123409441.1U
Other languages
Chinese (zh)
Inventor
杭从强
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.)
Jiangsu Yichi Environmental Protection Equipment Co ltd
Original Assignee
Jiangsu Yichi Environmental Protection Equipment 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 Jiangsu Yichi Environmental Protection Equipment Co ltd filed Critical Jiangsu Yichi Environmental Protection Equipment Co ltd
Priority to CN202123409441.1U priority Critical patent/CN217220635U/en
Application granted granted Critical
Publication of CN217220635U publication Critical patent/CN217220635U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

The utility model discloses an environment-friendly light oxygen exhaust-gas treatment equipment relates to exhaust-gas treatment equipment field, including the installation storehouse, the one end in installation storehouse is provided with the air inlet, and the one end that the air inlet was kept away from in the installation storehouse is provided with the gas outlet, the inside both sides in installation storehouse all are provided with the slide rail, and the inside of slide rail is provided with the installing frame, the both sides of installing frame all are provided with the slider, and the inside of installing frame is provided with first filter screen, the motor is installed to one side on installation storehouse top, and the output of motor is connected with the action wheel. The utility model discloses a when the inside filter screen in installation storehouse used a period to need take out to wash and change, can the starter motor for the motor drives the threaded rod and rotates, thereby drives the movable block and the connecting block rises, and it rises with this drive installing frame and filter screen, open the top lid take out it can, convenient operation, unnecessary staff gets into inside and takes out labour saving and time saving.

Description

Environment-friendly light oxygen exhaust-gas treatment equipment
Technical Field
The utility model relates to a waste gas treatment equipment field specifically is an environment-friendly light oxygen waste gas treatment equipment.
Background
The treatment of exhaust gas is also called exhaust gas purification. The waste gas treatment refers to the work of pretreating waste gas generated in industrial places and factory workshops before the waste gas is discharged to the outside so as to reach the national standard of the external discharge of the waste gas, and the general waste gas treatment comprises the aspects of organic waste gas treatment, dust waste gas treatment, acid-base waste gas treatment, peculiar smell waste gas treatment, air sterilization, disinfection and purification and the like.
The inside filter screen that often sets up of current light oxygen exhaust-gas treatment equipment, the filter screen uses a period and need change, current mode of taking out is artifical and extracts the filter screen, probably need the inside dismantlement of access arrangement in order to take out the filter screen, the operation is inconvenient, and the long outside of current light oxygen exhaust-gas treatment equipment internally mounted's ultraviolet lamp live time can be stained with and attach the dust, can influence the later stage and shine the effect, need for an environment-friendly light oxygen exhaust-gas treatment equipment for this reason urgently.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model aims at providing an environment-friendly light oxygen exhaust-gas treatment equipment to solve the inside filter screen that often sets up of current light oxygen exhaust-gas treatment equipment, the filter screen uses a period to need change, current mode of taking out is artifical and extracts out the filter screen, probably need the inside dismantlement of access arrangement in order to take out the filter screen, the operation is inconvenient, and the long outside of current light oxygen exhaust-gas treatment equipment internally mounted's photodissociation lamp live time can be stained with attaches the dust, can influence the technical problem of later stage irradiation effect.
In order to achieve the above object, the utility model provides a following technical scheme: an environment-friendly photo-oxidation waste gas treatment device comprises an installation bin, wherein an air inlet is formed in one end of the installation bin, an air outlet is formed in one end, far away from the air inlet, of the installation bin, slide rails are arranged on two sides of the interior of the installation bin, an installation frame is arranged inside the slide rails, slide blocks are arranged on two sides of the installation frame, a first filter screen is arranged inside the installation frame, a motor is installed on one side of the top end of the installation bin, the output end of the motor is connected with a driving wheel, the bottom end of the driving wheel is connected with a threaded rod, a sleeve rod is arranged on one side of the threaded rod, movable blocks are arranged on the outer sides of the threaded rod and the sleeve rod, a connecting block is connected to one side of each movable block, a second filter screen is arranged on the rear side of the first filter screen, a third filter screen is arranged on the rear side of the second filter screen, a fourth filter screen is arranged on the rear side of the third filter screen, and a UV photolysis lamp is arranged between the third filter screen and the fourth filter screen, and the outside of UV photodissociation lamp is connected with clean cover, one side of clean cover is connected with the connecting rod, and the telescopic link is installed to one side of connecting rod.
Preferably, the interior of air inlet has the suction fan, and air inlet and gas outlet all pass through the bolt and can dismantle with the installation storehouse and be connected.
Preferably, slider and slide rail phase-match, and the installing frame passes through slider and slide rail and installation storehouse sliding connection, the inside of installing frame is provided with the mounting groove, and first filter screen is located the inside of mounting groove, first filter screen passes through the bolt with the installing frame and can dismantle and be connected.
Preferably, one side of action wheel is provided with from the driving wheel, and the quantity from the driving wheel is the multiunit, the action wheel all is provided with the belt with the outside from the driving wheel, and the action wheel is provided with the install bin with the outside that is located the belt from the driving wheel, the action wheel all rotates with the install bin with from the driving wheel and is connected.
Preferably, the inside of the moving block is provided with a threaded hole matched with the threaded rod, one side of the threaded hole is provided with a through hole matched with the sleeve rod, the moving block is movably connected with the threaded rod and the sleeve rod, and the connecting block is fixedly connected with the mounting frame.
Preferably, the quantity of UV photodissociation lamp and clean cover all is the multiunit, multiunit clean cover all with UV photodissociation lamp swing joint.
Preferably, the bottom inside the installation bin is provided with a drawer, the drawer is movably connected with the installation bin, and a sealing gasket is arranged at the joint of the drawer and the installation bin.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses an installation storehouse, the air inlet, the gas outlet, a slide rail, the installing frame, the slider, first filter screen, a motor, the action wheel, the threaded rod, the loop bar, the movable block, the connecting block, the second filter screen, the third filter screen, the fourth filter screen that set up, when the filter screen needs to take out to wash and change when using for a period of time in the installation storehouse, can start the motor, make the motor drive the threaded rod and rotate, thereby drive movable block and connecting block to rise, drive installing frame and filter screen to rise with this, open the top lid and take out it can, convenient operation, needn't the staff get into inside and take out, labour saving and time saving;
2. the utility model discloses a UV photodissociation lamp, clean cover, connecting rod, telescopic link that set up have realized using after a period at UV photodissociation lamp, can start the telescopic link for the telescopic link drives clean cover and removes in the outside of UV photodissociation lamp, piles up the dust that is stained with the adhesion with the UV photodissociation lamp outside and strikes off, thereby makes later stage UV photodissociation lamp shine the effect equally good, and exhaust-gas treatment is effectual.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a cross-sectional view of the present invention.
Fig. 3 is a side view of the present invention.
Fig. 4 is a schematic structural diagram of the mounting frame of the present invention.
Fig. 5 is a schematic view of the connection structure of the UV photolysis lamp of the present invention.
In the figure: 1. installing a bin; 2. an air inlet; 3. an air outlet; 4. a slide rail; 5. installing a frame; 6. a slider; 7. a first filter screen; 8. a motor; 9. a driving wheel; 10. a threaded rod; 11. a loop bar; 12. a moving block; 13. connecting blocks; 14. a second filter screen; 15. a third filter screen; 16. a UV photolysis lamp; 17. cleaning the sleeve; 18. a connecting rod; 19. a telescopic rod; 20. and a fourth filter screen.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
Next, an embodiment of the present invention will be described with reference to the overall structure thereof.
Referring to fig. 1-5, an environment-friendly photo-oxidation waste gas treatment device comprises an installation bin 1, an air inlet 2 is arranged at one end of the installation bin 1, an air outlet 3 is arranged at one end of the installation bin 1 far away from the air inlet 2, a suction fan is arranged inside the air inlet 2, the air inlet 2 and the air outlet 3 are detachably connected with the installation bin 1 through bolts, the air inlet 2 is connected with a waste gas outlet, the treated waste gas is discharged through the air outlet 3, slide rails 4 are arranged on two sides inside the installation bin 1, an installation frame 5 is arranged inside the slide rails 4, slide blocks 6 are arranged on two sides of the installation frame 5, a first filter screen 7 is arranged inside the installation frame 5, the slide blocks 6 are matched with the slide rails 4, the installation frame 5 is slidably connected with the installation bin 1 through the slide blocks 6 and the slide rails 4, an installation groove is arranged inside the installation frame 5, and the first filter screen 7 is positioned inside the installation groove, the first filter screen 7 is detachably connected with the mounting frame 5 through bolts, the mounting frame 5 can be moved more conveniently through the matching of the slide rails 4 and the slide blocks 6, the ascending process is smoother, after the mounting frame 5 ascends, the bolt connecting the mounting frame 5 with the filter screens is detached from the top end, then the filter screens are taken out, the filter screens are replaced with new filter screens, after the mounting frame 5 is put back to the original position, one side of the top end of the mounting bin 1 is provided with a motor 8, the output end of the motor 8 is connected with a driving wheel 9, one side of the driving wheel 9 is provided with driven wheels, the number of the driven wheels is multiple, the outer sides of the driving wheel 9 and the driven wheels are both provided with belts, the outer sides of the driving wheel 9 and the driven wheels are positioned on the outer sides of the belts, the mounting bin is provided with a mounting box, the driving wheel 9 and the driven wheels are both rotatably connected with the mounting box, one side, positioned on the mounting box, at the top end of the mounting bin 1 is provided with a cover, and a sealing gasket is arranged between the cover and the mounting bin 1, the bottom end of the driving wheel 9 is connected with a threaded rod 10, one side of the threaded rod 10 is provided with a loop bar 11, the outer sides of the threaded rod 10 and the loop bar 11 are provided with moving blocks 12, one side of each moving block 12 is connected with a connecting block 13, the inside of each moving block 12 is provided with a threaded hole matched with the threaded rod 10, one side of each threaded hole is provided with a through hole matched with the loop bar 11, each moving block 12 is movably connected with the threaded rod 10 and the loop bar 11, each connecting block 13 is fixedly connected with the mounting frame 5, the rear side of the first filter screen 7 is provided with a second filter screen 14, the rear side of the second filter screen 14 is provided with a third filter screen 15, the rear side of the third filter screen 15 is provided with a fourth filter screen 20, and the mounting bin 1, the air inlet 2, the air outlet 3, the slide rail 4, the mounting frame 5, the slide block 6, the first filter screen 7, the motor 8, the driving wheel 9, the threaded rod 10, the loop bar 11, the moving blocks 12, The connecting block 13, the second filter screen 14, the third filter screen 15 and the fourth filter screen 20 can be started when the filter screen in the installation bin 1 needs to be taken out, cleaned and replaced after being used for a period of time, the motor 8 is enabled to drive the threaded rod 10 to rotate, the moving block 12 and the connecting block 13 are driven to ascend, the installation frame 5 and the filter screens are driven to ascend by opening a top cover, the top cover is opened to take out the filter screen, the operation is convenient, workers do not need to enter the interior to take out the filter screen, time and labor are saved, the first filter screen 7 is a front filter screen and can filter large-particle impurities, the second filter screen 14 is an activated carbon filter screen and can filter water vapor, dust and the like in waste gas, the third filter screen 15 is a photocatalyst carrier filter screen and can be matched with a UV photolysis lamp to decompose malodorous compound molecules in organic waste gas to achieve the purification purpose, the fourth filter screen 20 is a HEPA filter screen and can finally filter the micro molecules in the air, the filter can achieve better filtering and purifying effects by matching use.
Referring to fig. 1-5, an environment-friendly photo-oxidation waste gas treatment apparatus is provided, wherein a UV photolysis lamp 16 is disposed between a third filter screen 15 and a fourth filter screen 20, a cleaning sleeve 17 is connected to an outer side of the UV photolysis lamp 16, the number of the UV photolysis lamps 16 and the cleaning sleeve 17 is multiple, the multiple cleaning sleeves 17 are movably connected to the UV photolysis lamp 16, the cleaning sleeve 17 can be a cleaning scraper or a sponge material with a soft texture, so as to conveniently scrape off and clean dust on an outer side of the cleaning sleeve, a connecting rod 18 is connected to one side of the cleaning sleeve 17, a telescopic rod 19 is installed to one side of the connecting rod 18, a drawer is disposed at a bottom end inside the installation bin 1 and is movably connected to the installation bin 1, a sealing pad is disposed at a connection position of the drawer and the installation bin 1, and after the UV photolysis lamp 16, the cleaning sleeve 17, the connecting rod 18 and the telescopic rod 19 are disposed, the UV photolysis lamp 16 is used for a period of time, can start telescopic link 19, make telescopic link 19 drive clean cover 17 remove in the outside of UV photodissociation lamp 16, pile up the dust that is stained with and strike off UV photodissociation lamp 16 outside, thereby make later stage UV photodissociation lamp 16 shine the effect equally good, exhaust-gas treatment is effectual, telescopic link 19 is electric telescopic handle, drive the clean cover 17 removal at connecting rod 18 and both ends in the time of the start, thereby strike off the lamp body outside cleanly, impurity drops and is collected in the drawer.
The working principle is as follows: when the device is used, an external power supply is required to be connected and supplies electric energy to the device, so that the device can normally run, firstly, the suction fan in the air inlet 2 is started to be connected with the exhaust gas outlet, then, exhaust gas is sucked into the installation bin 1, in the installation bin 1, the exhaust gas is required to be filtered and adsorbed by the first filter screen 7, the second filter screen 14 and the third filter screen 15, then, the exhaust gas is subjected to photolysis treatment by the opened UV photolysis lamp 16, finally, the exhaust gas is subjected to the last filtering by the fourth filter screen 20, and after the four times of filtering, most impurities in the exhaust gas are removed after the photolysis treatment, and then, the exhaust gas is discharged through the air outlet 3, after the device is used for a period of time, the first filter screen 7, the second filter screen 14, the third filter screen 15 and the fourth filter screen 20 are adhered with impurities and are required to be taken out, then, the cleaning and replacing treatment is carried out, and the cover at the top end of the installation bin 1 is opened, then the motor 8 is started, so that the motor 8 drives the driving wheel 9 to rotate, the driving wheel 9 drives a plurality of groups of driven wheels to rotate through a belt, the driving wheel 9 and the driven wheels can both drive the threaded rod 10 at the bottom end to rotate, the threaded rod 10 can drive the moving block 12 to ascend in cooperation with the loop bar 11 and drive the mounting frame 5 to ascend through the connecting block 13, the mounting frame 5 drives the filter screen mounted inside to ascend together under the cooperation of the sliding rail 4 and the sliding block 6, the filter screen comes out from the top end and is convenient for workers to take out and replace, after the UV photolysis lamp 16 is used for a long time, a layer of impurities can be adhered to the outer side of the UV photolysis lamp 16, the UV photolysis lamp needs to be cleaned, the telescopic rod 19 is started, the telescopic rod 19 drives the connecting rod 18 and the cleaning sleeve 17 to move, the cleaning sleeve 17 is accordingly moved to move on the outer side of the UV photolysis lamp 16, the adhered impurities fall into a drawer at the bottom and are collected, the details not described in detail in this description are well known to the person skilled in the art as long as they are left out for cleaning by the staff.
The terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the scope of the invention.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (7)

1. The utility model provides an environment-friendly light oxygen exhaust-gas treatment equipment, includes installation storehouse (1), its characterized in that: an air inlet (2) is formed in one end of the installation bin (1), an air outlet (3) is formed in one end, far away from the air inlet (2), of the installation bin (1), slide rails (4) are arranged on two sides of the interior of the installation bin (1), an installation frame (5) is arranged inside the slide rails (4), sliders (6) are arranged on two sides of the installation frame (5), a first filter screen (7) is arranged inside the installation frame (5), a motor (8) is installed on one side of the top end of the installation bin (1), the output end of the motor (8) is connected with a driving wheel (9), a threaded rod (10) is connected to the bottom end of the driving wheel (9), a sleeve rod (11) is arranged on one side of the threaded rod (10), moving blocks (12) are arranged on the outer sides of the threaded rod (10) and the sleeve rod (11), and a connecting block (13) is connected to one side of the moving block (12), the rear side of first filter screen (7) is provided with second filter screen (14), and the rear side of second filter screen (14) is provided with third filter screen (15), the rear side of third filter screen (15) is provided with fourth filter screen (20), be provided with UV photodissociation lamp (16) between third filter screen (15) and fourth filter screen (20), and the outside of UV photodissociation lamp (16) is connected with clean cover (17), one side of clean cover (17) is connected with connecting rod (18), and one side of connecting rod (18) installs telescopic link (19).
2. The environment-friendly photo-oxygen waste gas treatment equipment as claimed in claim 1, wherein: the suction fan is installed inside the air inlet (2), and the air inlet (2) and the air outlet (3) are detachably connected with the installation bin (1) through bolts.
3. The environment-friendly photo-oxygen waste gas treatment equipment as claimed in claim 1, wherein: slider (6) and slide rail (4) phase-match, and installing frame (5) pass through slider (6) and slide rail (4) and installing bin (1) sliding connection, the inside of installing frame (5) is provided with the mounting groove, and first filter screen (7) are located the inside of mounting groove, first filter screen (7) can be dismantled through the bolt with installing frame (5) and be connected.
4. The environment-friendly photo-oxygen waste gas treatment equipment as claimed in claim 1, wherein: one side of action wheel (9) is provided with from the driving wheel, and the quantity from the driving wheel is the multiunit, action wheel (9) all are provided with the belt with the outside from the driving wheel, and action wheel (9) and the outside that is located the belt from the driving wheel are provided with the install bin, action wheel (9) all rotate with the install bin with from the driving wheel and be connected.
5. The environment-friendly photo-oxygen waste gas treatment equipment as claimed in claim 1, wherein: the movable block (12) is internally provided with a threaded hole matched with the threaded rod (10), one side of the threaded hole is provided with a through hole matched with the sleeve rod (11), the movable block (12) is movably connected with the threaded rod (10) and the sleeve rod (11), and the connecting block (13) is fixedly connected with the mounting frame (5).
6. The environment-friendly photo-oxygen waste gas treatment equipment as claimed in claim 1, wherein: UV photodissociation lamp (16) and the quantity of clean cover (17) all are the multiunit, multiunit clean cover (17) all with UV photodissociation lamp (16) swing joint.
7. The environment-friendly photo-oxygen waste gas treatment equipment as claimed in claim 1, wherein: the bottom of the interior of the installation bin (1) is provided with a drawer, the drawer is movably connected with the installation bin (1), and a sealing gasket is arranged at the joint of the drawer and the installation bin (1).
CN202123409441.1U 2021-12-31 2021-12-31 Environment-friendly light oxygen exhaust-gas treatment equipment Active CN217220635U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202123409441.1U CN217220635U (en) 2021-12-31 2021-12-31 Environment-friendly light oxygen exhaust-gas treatment equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202123409441.1U CN217220635U (en) 2021-12-31 2021-12-31 Environment-friendly light oxygen exhaust-gas treatment equipment

Publications (1)

Publication Number Publication Date
CN217220635U true CN217220635U (en) 2022-08-19

Family

ID=82827693

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202123409441.1U Active CN217220635U (en) 2021-12-31 2021-12-31 Environment-friendly light oxygen exhaust-gas treatment equipment

Country Status (1)

Country Link
CN (1) CN217220635U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117138479A (en) * 2023-10-31 2023-12-01 江苏新聚环保科技有限公司 Waste gas catalytic oxidation equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117138479A (en) * 2023-10-31 2023-12-01 江苏新聚环保科技有限公司 Waste gas catalytic oxidation equipment

Similar Documents

Publication Publication Date Title
CN210255603U (en) Steel sheet surface rust cleaning device for machining
CN217220635U (en) Environment-friendly light oxygen exhaust-gas treatment equipment
CN113623811B (en) Air purification filter core convenient to clean dust
CN212731503U (en) Novel harmful gas treatment for environmental protection engineering device
CN211840588U (en) Air draft dust removal mechanism of laser engraving cutting machine
CN215863949U (en) Mobilizable air purifier
CN216986958U (en) High conversion dust waste gas integrated processing equipment
CN215085767U (en) Dust collector for environmental protection engineering
CN211635790U (en) Efficient dust removal environmental protection equipment
KR20080004493U (en) Dust collector
CN209715968U (en) A kind of storage vat cleaning device
CN216259766U (en) Air purification device for printing workshop
CN213730088U (en) Multi-station welding device for welding mechanical arm
CN219399395U (en) Novel semiconductor equipment exhaust-gas treatment environmental protection device
CN219149561U (en) Smoke dust degradation treatment device
CN219168047U (en) Printing exhaust gas treatment ware convenient to retrieve waste residue
CN218130695U (en) Dust collecting equipment that makes an uproar falls of ceramic material production usefulness
CN210229524U (en) Workshop dust disposal environmental protection system
CN217698382U (en) Dust extraction is used to interior decoration fitment
CN220736744U (en) Gas separation system applied to continuous treatment process of thermal cracking of medical waste
CN218687446U (en) Oil mist purifying equipment with peculiar smell removing function for processing water-soluble cutting fluid
CN215062279U (en) Oil smoke clarifier convenient to wash
CN212881677U (en) Aluminum veneer workshop dust collector
CN220829083U (en) Graphitizing furnace cover with flue gas collection function
CN212790497U (en) Photocatalysis environmental protection equipment convenient to maintain

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant