CN113829213B - Surface cleaning equipment for steel structure manufacturing and processing - Google Patents
Surface cleaning equipment for steel structure manufacturing and processing Download PDFInfo
- Publication number
- CN113829213B CN113829213B CN202111133259.XA CN202111133259A CN113829213B CN 113829213 B CN113829213 B CN 113829213B CN 202111133259 A CN202111133259 A CN 202111133259A CN 113829213 B CN113829213 B CN 113829213B
- Authority
- CN
- China
- Prior art keywords
- bolts
- fixed
- workbench
- mounting plate
- steel structure
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 45
- 239000010959 steel Substances 0.000 title claims abstract description 45
- 238000004140 cleaning Methods 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000005498 polishing Methods 0.000 claims abstract description 21
- 230000000149 penetrating effect Effects 0.000 claims description 11
- 230000000712 assembly Effects 0.000 abstract description 8
- 238000000429 assembly Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000002444 silanisation Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B27/00—Other grinding machines or devices
- B24B27/033—Other grinding machines or devices for grinding a surface for cleaning purposes, e.g. for descaling or for grinding off flaws in the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/008—Machines comprising two or more tools or having several working posts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/18—Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/20—Drives or gearings; Equipment therefor relating to feed movement
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses surface cleaning equipment for manufacturing and processing a steel structure, which comprises a workbench, wherein mounting columns are integrally formed on two side edges of the front surface of the workbench, square frames are fixed between the mounting columns through bolts, movable assemblies are arranged on the four sides of the outer sides of the square frames, telescopic polishing assemblies are arranged on the movable assemblies, which penetrate through the other ends of the square frames, grooves are formed in the upper ends of the two side surfaces of the workbench, pushing assemblies are arranged in the grooves, and a pushing plate is fixed on one end, extending out of the upper surface of the workbench, of each pushing assembly through bolts. The invention has the advantages that: the four sides of the steel structure can be polished simultaneously, so that the surface cleaning effect is high, and time and labor are saved; and through pushing the subassembly, can promote whole steel construction, can carry out automatic complete clearance operation to a steel construction.
Description
Technical Field
The invention relates to the technical field of steel structure manufacturing, in particular to surface cleaning equipment for steel structure manufacturing and processing.
Background
Steel structures are structures composed of steel materials, and are one of the main types of building structures. The structure mainly comprises steel beams, steel columns, steel trusses and other components made of section steel, steel plates and the like, and rust removal and prevention processes such as silanization, pure manganese phosphating, washing, drying, galvanization and the like are adopted. The components or parts are typically joined by welds, bolts or rivets. Because the self weight is lighter, and the construction is simple and convenient, the method is widely applied to the fields of large-scale factory buildings, venues, super high-rise buildings and the like. Steel structures are prone to rust, and generally steel structures are subject to rust removal, galvanization or paint and periodic maintenance.
After the steel structure is processed, burrs or parts of the steel structure rust on the outer surface of the steel structure, and related cleaning operations are needed to be carried out on the surface of the steel structure. The existing mode is that the iron brush is used for brushing the outer surface of the iron brush at most manually, so that the working efficiency is low and the labor cost is increased.
Disclosure of Invention
The invention aims to solve the problems, and provides surface cleaning equipment for manufacturing and processing a steel structure, which can polish four sides of the steel structure simultaneously, has a high surface cleaning effect, and is time-saving and labor-saving; and through pushing the subassembly, can promote whole steel construction, can carry out automatic complete clearance operation to a steel construction.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: the surface cleaning equipment for manufacturing and processing the steel structure comprises a workbench, wherein mounting columns are integrally formed on two side edges of the front surface of the workbench, square frames are fixed between the mounting columns through bolts, movable assemblies are arranged on four sides of the outer sides of the square frames, telescopic polishing assemblies are arranged on the movable assemblies, which penetrate through the other ends of the square frames, grooves are formed in the upper ends of the two side surfaces of the workbench, pushing assemblies are arranged in the grooves, and a pushing plate is fixed on one end, extending out of the upper surface of the workbench, of each pushing assembly through bolts;
The telescopic polishing assembly comprises a damper fixed on the extending end of the moving assembly through bolts, a mounting plate is fixed at the other end of the damper through bolts, a motor mounting plate is fixed on one face of the mounting plate through bolts, a motor is fixed on the motor mounting plate through bolts, a short shaft penetrating through the mounting plate is connected to one end of the motor mounting plate, which penetrates through the motor mounting plate, of the motor output end, a rotary drum is sleeved on the short shaft, a second short shaft is rotated on the other face of the mounting plate, a second rotary drum is sleeved on the second short shaft, and a polishing belt is sleeved between the rotary drum and the second rotary drum.
Preferably, the moving assembly comprises electric push rods fixed at two ends of each outer side face of the square frame through bolts, through holes are formed in the middle of four sides of the square frame, a mounting rod penetrating through the through holes is fixed between the extending ends of the electric push rods on the same face through bolts, and the damper is fixed at the other end of the mounting rod through bolts.
Preferably, the pushing assembly comprises a second motor fixed on two side edges of the back of the workbench through bolts, a screw rod is connected to one end of the second motor extending into the groove, the other end of the screw rod is rotationally connected with the front of the groove, strip-shaped through holes communicated with the groove are formed in the two side edges of the top of the workbench, a sliding plate penetrating through the strip-shaped through holes is connected to the screw rod in a threaded manner, a second mounting plate is integrally formed at the upper end of the sliding plate, and the second mounting plate is fixed on the second mounting plate through bolts.
Preferably, a supporting frame is fixed between two sides of the rear surface of the square frame and the workbench through bolts.
Preferably, the front and rear surfaces of the mounting rod are integrally formed with sliding strips, and sliding grooves matched with the sliding strips to slide are formed in the through holes.
Compared with the prior art, the invention has the advantages that: when the telescopic polishing assembly is used, the telescopic polishing assembly is arranged, so that polishing and cleaning operations can be carried out on all the four sides of the steel structure, the steel structure does not need to be overturned, and the cleaning is comprehensive; the movable assembly is arranged, so that the movable assembly can be suitable for polishing steel structures with different cross section sizes, and has a wide application range; the pushing component is arranged, and the steel structure can be pushed by polishing edges through the pushing plate, so that the cleaning and polishing of the whole surface of the steel structure are completed, the automation degree is high, time and labor are saved, and the labor cost is saved; the sliding strip and the sliding groove are arranged, so that the movement of the moving assembly is more stable and reliable when the moving assembly moves; the arrangement of the supporting frame can enable the installation of the square frame to be more stable and reliable.
Drawings
Fig. 1 is a schematic diagram of a front view of a surface cleaning apparatus for steel structure fabrication and processing according to the present invention.
Fig. 2 is a schematic left-view structure of a surface cleaning apparatus for steel structure fabrication and processing according to the present invention.
Fig. 3 is a schematic left-view structural diagram of a telescopic polishing assembly of a surface cleaning device for steel structure manufacturing and processing according to the present invention.
As shown in the figure: 1. a work table; 2. a mounting column; 3. a square frame; 4. a groove; 5. a push plate; 6. a damper; 7. a mounting plate; 8. a motor mounting plate; 9. a motor; 10. a short shaft; 11. a rotating drum; 12. a second rotary drum; 13. polishing the belt; 14. an electric push rod; 15. a through hole; 16. a mounting rod; 17. a second motor; 18. a screw; 19. a strip-shaped through hole; 20. a slide plate; 21. a support frame; 22. a slide bar; 23. and a sliding groove.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, a surface cleaning device for manufacturing and processing a steel structure comprises a workbench 1, wherein mounting columns 2 are integrally formed on two side edges of the front surface of the workbench 1, a square frame 3 is fixed between the mounting columns 2 through bolts, movable components are arranged on four sides of the outer side of the square frame 3, the movable components penetrate through the other end of the square frame 3 and are provided with telescopic polishing components, grooves 4 are formed in the upper ends of the two side surfaces of the workbench 1, pushing components are arranged in the grooves 4, and a push plate 5 is fixed on one end of each pushing component extending out of the upper surface of the workbench 1 through bolts;
Referring to fig. 3, the telescopic polishing assembly comprises a damper 6 fixed on the extending end of the moving assembly through bolts, a mounting plate 7 is fixed on the other end of the damper 6 through bolts, a motor mounting plate 8 is fixed on one surface of the mounting plate 7 through bolts, a motor 9 is fixed on the motor mounting plate 8 through bolts, a short shaft 10 penetrating through the mounting plate 7 is connected to one end of the motor mounting plate 8, a rotary drum 11 is sleeved on the short shaft 10, a second short shaft 12 is sleeved on the other surface of the mounting plate 7, and a polishing belt 13 is sleeved between the rotary drum 11 and the second rotary drum 12.
The mounting plate 7 is in an inverted L shape, and the motor mounting plate 8 is in a shape of a Chinese character 'ji'.
Referring to fig. 1, the moving assembly includes electric push rods 14 fixed at two ends of each outer side surface of the square frame 3 by bolts, through holes 15 are formed in the middle of four sides of the square frame 3, a mounting rod 16 penetrating through the through holes 15 is fixed between the extending ends of the two electric push rods 14 on the same side by bolts, and the damper 6 is fixed at the other end of the mounting rod 16 by bolts.
Referring to fig. 2, the pushing assembly includes a second motor 17 fixed on two sides of the back of the workbench 1 by bolts, a screw 18 is connected to one end of the second motor 17 extending into the groove 4, the other end of the screw 18 is rotationally connected with the front of the groove 4, two strip through holes 19 communicated with the groove 4 are formed on two sides of the upper surface of the workbench 1, a sliding plate 20 penetrating through the strip through holes 19 is connected to the screw 18 by threads, a second mounting plate is integrally formed at the upper end of the sliding plate 20, and the pushing plate 5 is fixed on the second mounting plate by bolts.
A supporting frame 21 is fixed between the two sides of the rear surface of the square frame 3 and the workbench 1 through bolts.
The front and rear surfaces of the mounting rod 16 are integrally formed with sliding strips 22, and a sliding chute 23 matched with the sliding strips 22 to slide is formed in the through hole 15.
Specific embodiments of the invention: when the invention is used, firstly, a steel structure is placed on the workbench 1, then the motor 9 is started to rotate to drive the rotary drum 11 to rotate, so that the polishing belt 13 is driven to rotate at a high speed, then the steel structure can be plugged into the space between the four polishing belts 13, then the motor II 17 is started to rotate to drive the screw 18 to rotate, so that the slide plate 20 drives the push plate 5 to move, and then the steel structure is pushed, so that the whole body of the steel structure is polished; if the steel structure is large in cross section, the electric push rod 14 can be started to reciprocate, so that the telescopic polishing assembly is driven to polish in a reciprocating manner, and the surface of the steel structure with a large size is cleaned conveniently.
The invention and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the invention as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present invention.
Claims (4)
1. The surface cleaning equipment for manufacturing and processing the steel structure comprises a workbench (1), wherein mounting columns (2) are integrally formed on two side edges of the front surface of the workbench (1), the surface cleaning equipment is characterized in that square frames (3) are fixed between the mounting columns (2) through bolts, movable components are arranged on the four sides of the outer sides of the square frames (3), telescopic polishing components are arranged at the other ends of the movable components, penetrating through the square frames (3), grooves (4) are formed in the upper ends of the two side surfaces of the workbench (1), pushing components are arranged in the grooves (4), and pushing plates (5) are fixed on one ends, extending out of the upper surface of the workbench (1), of the pushing components through bolts;
The telescopic polishing assembly comprises a damper (6) fixed on the extending end of the moving assembly through bolts, a mounting plate (7) is fixed on the other end of the damper (6) through bolts, a motor mounting plate (8) is fixed on one surface of the mounting plate (7) through bolts, a motor (9) is fixed on the motor mounting plate (8) through bolts, a short shaft (10) penetrating through the mounting plate (7) is connected to one end of the motor mounting plate (8) penetrating through the output end of the motor (9), a rotary drum (11) is sleeved on the short shaft (10), a second short shaft (12) is rotated on the other surface of the mounting plate (7), and a polishing belt (13) is sleeved between the rotary drum (11) and the second rotary drum (12);
The movable assembly comprises electric push rods (14) which are fixed at two ends of each outer side face of the square frame (3) through bolts, through holes (15) are formed in the middle of four sides of the square frame (3), mounting rods (16) penetrating through the through holes (15) are fixed between the extending ends of the electric push rods (14) on the same face through bolts, and the damper (6) is fixed at the other end of each mounting rod (16) through bolts.
2. The surface cleaning apparatus for steel structure manufacturing and processing as claimed in claim 1, wherein: the pushing assembly comprises a second motor (17) fixed on two side edges of the back of the workbench (1) through bolts, a screw rod (18) is connected to one end of the second motor (17) extending into the groove (4), the other end of the screw rod (18) is rotationally connected with the front of the groove (4), strip-shaped through holes (19) communicated with the groove (4) are formed in the two side edges of the top of the workbench (1), a sliding plate (20) penetrating through the strip-shaped through holes (19) is connected to the screw rod (18) in a threaded mode, a second mounting plate is integrally formed at the upper end of the sliding plate (20), and the pushing plate (5) is fixed on the second mounting plate through bolts.
3. The surface cleaning apparatus for steel structure manufacturing and processing as claimed in claim 1, wherein: a supporting frame (21) is fixed between the two sides of the rear surface of the square frame (3) and the workbench (1) through bolts.
4. The surface cleaning apparatus for steel structure manufacturing and processing as claimed in claim 1, wherein: the front and rear surfaces of the mounting rod (16) are integrally formed with sliding strips (22), and sliding grooves (23) matched with the sliding strips (22) to slide are formed in the through holes (15).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111133259.XA CN113829213B (en) | 2021-09-27 | 2021-09-27 | Surface cleaning equipment for steel structure manufacturing and processing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111133259.XA CN113829213B (en) | 2021-09-27 | 2021-09-27 | Surface cleaning equipment for steel structure manufacturing and processing |
Publications (2)
Publication Number | Publication Date |
---|---|
CN113829213A CN113829213A (en) | 2021-12-24 |
CN113829213B true CN113829213B (en) | 2024-04-19 |
Family
ID=78970537
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202111133259.XA Active CN113829213B (en) | 2021-09-27 | 2021-09-27 | Surface cleaning equipment for steel structure manufacturing and processing |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN113829213B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114643522B (en) * | 2022-03-03 | 2023-02-28 | 扬州市华光双瑞实业有限公司 | Automatic clearance collet mechanism |
CN116276522A (en) * | 2023-05-16 | 2023-06-23 | 江油星联电子科技有限公司 | Burr removing device for printed circuit board production |
CN116852222B (en) * | 2023-09-04 | 2023-12-12 | 河南金溢绿色建筑科技有限公司 | Fire window processing equipment |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1026020C2 (en) * | 2004-04-23 | 2005-10-25 | Bosch Gmbh Robert | Belt sander with sanding depth reference device. |
CN111438601A (en) * | 2020-05-19 | 2020-07-24 | 新疆八一钢铁股份有限公司 | Steel grinding device |
CN211890326U (en) * | 2020-01-15 | 2020-11-10 | 盛方勇 | Pipeline surface rust cleaning device for water conservancy construction |
CN211940252U (en) * | 2020-01-14 | 2020-11-17 | 天津国溢石油装备有限公司 | Reversing equipment for machining automobile parts |
CN212145700U (en) * | 2020-04-29 | 2020-12-15 | 张吉元 | Rectangular square tube polishing equipment |
CN212735465U (en) * | 2020-05-29 | 2021-03-19 | 江苏省沙钢钢铁研究院有限公司 | Sample grinding device for abrasive belt machine |
WO2021051374A1 (en) * | 2019-09-20 | 2021-03-25 | 大连理工大学 | Coupling beam shear displacement amplification-type eddy current damper |
CN112847089A (en) * | 2021-01-08 | 2021-05-28 | 陈宏� | A rust cleaning device for sheet metal |
CN113182993A (en) * | 2021-05-18 | 2021-07-30 | 温州市聚盛丰达轻工设备有限公司 | Five metals rigging processing is with lathe of polishing |
CN113352163A (en) * | 2021-07-15 | 2021-09-07 | 灵璧县德军家具制造有限公司 | Furniture manufacturing wood board cutting surface polishing device and method |
-
2021
- 2021-09-27 CN CN202111133259.XA patent/CN113829213B/en active Active
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1026020C2 (en) * | 2004-04-23 | 2005-10-25 | Bosch Gmbh Robert | Belt sander with sanding depth reference device. |
WO2021051374A1 (en) * | 2019-09-20 | 2021-03-25 | 大连理工大学 | Coupling beam shear displacement amplification-type eddy current damper |
CN211940252U (en) * | 2020-01-14 | 2020-11-17 | 天津国溢石油装备有限公司 | Reversing equipment for machining automobile parts |
CN211890326U (en) * | 2020-01-15 | 2020-11-10 | 盛方勇 | Pipeline surface rust cleaning device for water conservancy construction |
CN212145700U (en) * | 2020-04-29 | 2020-12-15 | 张吉元 | Rectangular square tube polishing equipment |
CN111438601A (en) * | 2020-05-19 | 2020-07-24 | 新疆八一钢铁股份有限公司 | Steel grinding device |
CN212735465U (en) * | 2020-05-29 | 2021-03-19 | 江苏省沙钢钢铁研究院有限公司 | Sample grinding device for abrasive belt machine |
CN112847089A (en) * | 2021-01-08 | 2021-05-28 | 陈宏� | A rust cleaning device for sheet metal |
CN113182993A (en) * | 2021-05-18 | 2021-07-30 | 温州市聚盛丰达轻工设备有限公司 | Five metals rigging processing is with lathe of polishing |
CN113352163A (en) * | 2021-07-15 | 2021-09-07 | 灵璧县德军家具制造有限公司 | Furniture manufacturing wood board cutting surface polishing device and method |
Also Published As
Publication number | Publication date |
---|---|
CN113829213A (en) | 2021-12-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN113829213B (en) | Surface cleaning equipment for steel structure manufacturing and processing | |
CN107029960A (en) | A kind of timber auto spray painting device | |
CN111496603A (en) | Automatic grinding machanism of horizontal roof beam of surface fabric support frame | |
CN112571247B (en) | Construction steel bar processing apparatus | |
CN114571309A (en) | Door and window frame deburring device and processing method | |
CN204504961U (en) | A kind of steel tube derusting machine | |
CN211029303U (en) | Timber grinding device | |
CN116766028A (en) | Bamboo article polishing processingequipment | |
CN208854594U (en) | A kind of workbench for machinery production processing | |
CN218252043U (en) | A fortune dimension cleans machine people for photovoltaic board | |
CN214108069U (en) | Novel cleaning equipment of hardware production and processing usefulness | |
CN213196628U (en) | Drilling device for steel structural member | |
CN210909391U (en) | Wooden model grinding device | |
CN210230374U (en) | Automatic door plate paint spraying production line | |
CN208729405U (en) | A kind of automatic edging film removing device of glass | |
CN107351155B (en) | Novel abrasive paper slabbing machine | |
CN221270046U (en) | Automobile part positioning device for laser tool | |
CN219767728U (en) | Assembled steel construction grinding device | |
CN220029574U (en) | Steel construction processing cutting device | |
CN217291846U (en) | Reinforcing bar surface rust cleaning device with adjustable building field is used | |
CN219197129U (en) | Wooden door convenient to installation | |
CN221232223U (en) | Integrated wallboard production deburring device | |
CN218110359U (en) | Polishing machine with workpiece rotation supporting device | |
CN219293607U (en) | Rust removal mechanism for columnar steel structural member | |
CN219561515U (en) | Scraper conveyor chain rod drilling device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |