CN104607472B - Emulsion injection beam device - Google Patents
Emulsion injection beam device Download PDFInfo
- Publication number
- CN104607472B CN104607472B CN201410759533.8A CN201410759533A CN104607472B CN 104607472 B CN104607472 B CN 104607472B CN 201410759533 A CN201410759533 A CN 201410759533A CN 104607472 B CN104607472 B CN 104607472B
- Authority
- CN
- China
- Prior art keywords
- emulsion
- cavity
- compressed
- fixed
- spray beam
- 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
Landscapes
- Nozzles (AREA)
Abstract
The present invention relates to a kind of emulsion injection beam device, it is all provided with inside spray beam including emulsion cavity and compressed air cavity, two emulsifying sap cavity piston rods are respectively arranged on the two ends of emulsion cavity, two air chamber piston rods are respectively arranged on the two ends of compressed air cavity, the emulsifying sap cavity piston rod and the air chamber piston rod that are positioned at the same side are fixed in a fixed plate, fixed plate is connected with self locking hydraulic cylinder, and self locking hydraulic cylinder is fixed on spray beam side；Spray beam is provided with the service duct connected with emulsion cavity and compressed air cavity；The lower surface of spray beam is provided with Emulsified liquid nozzle and compressed-air atomizer, and Emulsified liquid nozzle connects with emulsion cavity, and compressed-air atomizer connects with compressed air cavity, and the winding-up angle of two kinds of nozzles can be adjusted flexibly according to practical situation.Emulsion injection beam device not only improves the uneven situation of emulsion injection by said structure, and well solves the problem that emulsion purging is undesirable.
Description
Technical field
The present invention relates to a kind of emulsion injection beam device, apply and in steel rolling field.
Background technology
For belt steel rolling, emulsion has extremely important effect.First emulsion plays lubrication in the operation of rolling, which reduces the coefficient of friction between roll and strip steel, reduces roll wear, extends roll campaign, and reduces roll-force；Secondly, due to the friction of roll Yu strip steel in the operation of rolling, roller temperature is made to raise, owing to temperature rise is uneven and occur roller heat convex degree learning to deform, cause belt plate shape bad, by the jet-action of emulsion, temperature is effectively inhibited to raise, hence it is evident that to improve belt plate shape；Finally, by the jet-action of emulsion, the impurity foreign body on strip steel or roll can be removed, play cleaning action.Although emulsion has above advantage, if but it is unfavorable to emulsion remained purging, it is made to bond to belt steel surface, Emulsion spot will be formed, affect strip surface quality, serious also results in strip steel corrosion, especially the techniques such as follow-up coating is brought very burden, so wanting the emulsion remained purging problem of enough attention.
For reversable cold-rolling machine, owing to mill housing internal unit is various, narrow space, and emulsion injection and blow device are arranged in inlet of rolling mill and outlet simultaneously, it appears equipment is the most crowded, the plant maintenance maintenance extremely inconvenience of milling train body interior；Additionally, owing to rolled strip width is different, emulsion injection water curtain and coolant emulsion liquid blowing remover must be able to meet the change of strip width, and in prior art designs, although emulsion injection width of water curtain is adjustable, but sectional-regulated relatively fixing inflexible, or water curtain is wide causes emulsion to waste, or water curtain is narrow and can not cover strip width, the control of nozzle is the most relatively complicated；Simultaneously, the purging width of coolant emulsion liquid blowing remover can not accurately adapt to strip width, when strip steel is become ribbon steel by broadband, compressed air is caused to waste in a large number, and strip steel is when being become broadband by arrowband, purging width is inadequate again, causes at the roll gap channelling can not be fully erased to the emulsion of milling train other side, do not have effectively to realize emulsion purging function, cause emulsion residue；Finally, when strip steel reversely rolls, the emulsion injection beam of band steel exports quits work, but remains in the emulsion in spray beam and can drop onto belt steel surface at nozzle, and blow device cannot effectively be removed, cause emulsion residue.
It is therefore desirable to design a kind of new emulsion injection beam device, to overcome the problems referred to above.
Summary of the invention
It is an object of the invention to overcome the defect of prior art, provide a kind of emulsion injection beam device, its injection width of water curtain and purging width can change with strip width change, and nozzle spray deflection angle can be adjusted according to practical situation, not only improve the uneven situation of emulsion injection, and well solve the problem that emulsion purging is undesirable.
The present invention is achieved in that
The present invention provides a kind of emulsion injection beam device, including spray beam, an emulsion cavity, a compressed air cavity, two emulsifying sap cavity piston rods and two air chamber piston rods；Described emulsion cavity and described compressed air cavity are all provided with inside described spray beam, and be arranged in parallel, two emulsifying sap cavity piston rods are respectively arranged on the two ends of described emulsion cavity, two air chamber piston rods are respectively arranged on the two ends of described compressed air cavity, wherein, the described emulsifying sap cavity piston rod and the described air chamber piston rod that are positioned at the same side are fixed in a fixed plate, described fixed plate is connected by earrings and a self locking hydraulic cylinder, and described self locking hydraulic cylinder is fixed on the side of described spray beam by base；Described spray beam is provided with the service duct connected with described emulsion cavity and described compressed air cavity, and the end of described service duct is provided with flange；The lower surface of described spray beam is provided with installation Emulsified liquid nozzle and the screw thread of compressed-air atomizer, described Emulsified liquid nozzle is fixed on screw thread, and connect with described emulsion cavity, described compressed-air atomizer is fixed on screw thread, and connects with described compressed air cavity.
Further, described spray beam is processed by steel plate.
Further, the position that described emulsifying sap cavity piston rod is connected with described emulsion cavity is provided with sealing ring, and the position that described air chamber piston rod is connected with described compressed air cavity is provided with sealing ring.
Further, described emulsifying sap cavity piston rod is also cross with the fairlead of sealing ring and the end cap that is fixed in described spray beam, and is fixed in described fixed plate by nut.
Further, described air chamber piston rod is also cross with the fairlead of sealing ring and the end cap that is fixed in described spray beam, and is fixed in described fixed plate by nut.
Further, the more described compressed-air atomizer of described Emulsified liquid nozzle is near the roll rolling strip steel.
Further, described compressed-air atomizer is that toed-out is arranged relative to strip width direction.
Further, lining and compression spring it are equipped with between described Emulsified liquid nozzle and described compressed-air atomizer and described spray beam.
Further, it is provided with sealing device between described lining and described spray beam.
The method have the advantages that
Stretching by self locking hydraulic cylinder, the emulsifying sap cavity piston rod linked together with fixed plate and air chamber piston rod is driven to move relative to spray beam, thus change the internal emulsion cavity of spray beam and the size of compressed air cavity, the state that final control Emulsified liquid nozzle and compressed-air atomizer open or close, reach to change emulsion injection width of water curtain and compressed air purging width to adapt to the purpose of strip width change, also achieve the linkage of emulsion water curtain and compressed air purging width, more effectively remove the emulsion remained of belt steel surface, well solve the problem that existing emulsion purging is undesirable.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the emulsion injection beam device that Fig. 1 provides for the embodiment of the present invention；
Fig. 2 is the A-A sectional view in Fig. 1；
Fig. 3 is the C direction view in Fig. 1；
Fig. 4 is the B-B sectional view in Fig. 1.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, all other embodiments that those of ordinary skill in the art are obtained on the premise of not making creative work, broadly fall into the scope of protection of the invention.
As shown in Figure 1 to Figure 4, the embodiment of the present invention provides a kind of emulsion injection beam device, including spray beam 1, one 17, two emulsifying sap cavity piston rods 4 of emulsion cavity 16, compressed air cavity and two air chamber piston rods 5.
As shown in Figure 1 to Figure 4, described spray beam 1 is processed by steel plate, it is internal that described emulsion cavity 16 and described compressed air cavity 17 are all located at described spray beam 1, and be arranged in parallel, two emulsifying sap cavity piston rods 4 are respectively arranged on the two ends of described emulsion cavity 16, two air chamber piston rods 5 are respectively arranged on the two ends of described compressed air cavity 17, and wherein, the described emulsifying sap cavity piston rod 4 and the described air chamber piston rod 5 that are positioned at the same side are fixed in a fixed plate 3.In this preferred embodiment, in order to prevent compressed air and emulsion leakage, the position that described emulsifying sap cavity piston rod 4 is connected with described emulsion cavity 16 is provided with sealing ring 6, and the position that described air chamber piston rod 5 is connected with described compressed air cavity 17 is provided with sealing ring 6.Described emulsifying sap cavity piston rod 4 is also cross with the fairlead of sealing ring and the end cap that is fixed in described spray beam 1, and is fixed in described fixed plate 3 by nut；Described air chamber piston rod 5 is also cross with the fairlead 15 of sealing ring and the end cap 7 that is fixed in described spray beam 1, and is fixed in described fixed plate 3 by nut.For preventing the fluid leakage between end cap 7 and spray beam 1, the position of both contacts carries out sealing setting.
As shown in Figure 1 to Figure 4, described fixed plate 3 is connected with a self locking hydraulic cylinder 9 by earrings 8, and described self locking hydraulic cylinder 9 is fixed on the side of described spray beam 1 by base 10.Described spray beam 1 is provided with the service duct connected with described emulsion cavity 16 and described compressed air cavity 17, and the end of described service duct is provided with flange 2, and described flange 2 is for being connected with supply emulsion and compressed-air actuated pipeline.Emulsifying sap cavity piston rod 4 and air chamber piston rod 5 are when being pulled out by self locking hydraulic cylinder 9, it sometimes appear that crooked situation, two kinds of piston rods can be made to haul out from the cavity of spray beam 1 smoothly by fairlead 15, when after fairlead 15 serious wear, can open end cap 7 and be replaced maintenance, attended operation is simple and convenient.
As shown in Figure 1 to Figure 4, the lower surface of described spray beam 1 is provided with installation Emulsified liquid nozzle 12 and the screw thread of compressed-air atomizer 13, described Emulsified liquid nozzle 12 is fixed on screw thread, and connect with described emulsion cavity 16, described compressed-air atomizer 13 is fixed on screw thread, and connects with described compressed air cavity 17.The described more described compressed-air atomizer of Emulsified liquid nozzle 12 13 is near the roll rolling strip steel, and when being so conducive to reversely rolling, described compressed-air atomizer 13 purging removes the emulsion of drippage in spray beam 1.Described compressed-air atomizer 13 is that toed-out is arranged relative to strip width direction, is conducive to the emulsion on strip steel to blow off from steel edge portion.The intermediate noxzzle of Emulsified liquid nozzle 12 and compressed-air atomizer 13 belongs to normal spraying nozzle, and two side nozzles can carry out on-off control according to strip width, has not only saved fluid resources, also provide enhanced emulsion injection and air purges effect.Two kinds of nozzles are connected with spray beam 1 by screw thread, lining 11 and compression spring 14 it is equipped with between described Emulsified liquid nozzle 12 and described compressed-air atomizer 13 and described spray beam 1, being provided with sealing device between described lining 11 and described spray beam 1, when preventing nozzle operation, emulsion or compressed air are revealed.
nullAs shown in Figure 1 to Figure 4，During the work of described emulsion injection beam device，Reversable mill is before forward rolls，Entrance side needs to spray emulsion lubrication roll gap，The piston rod of self locking hydraulic cylinder 9 stretches out，Fixed plate 3 is driven to move，Move together with the emulsifying sap cavity piston rod 4 linked together with fixed plate 3 therewith and air chamber piston rod 5，At this moment the cavity volume within spray beam 1 increases，Emulsified liquid nozzle 12 and compressed-air atomizer 13 are opened one by one，After Emulsified liquid nozzle 12 water curtain be enough to cover strip width，Self locking hydraulic cylinder 9 is locked，Its piston rod also stops stretching out，Emulsion cavity 16 within spray beam 1 and the constancy of volume of compressed air cavity 17，Pressure is in steady state，Ensure that pressure during nozzle operation，Air feed passage is cut off in the process，So compressed-air atomizer 13 does not works，It is closed.The self locking hydraulic cylinder 9 of milling train outlet side also by piston rod stretch out regulate purging air curtain width, its process is identical with the operating process of entrance side spray beam 1, except for the difference that opening compressed-air atomizer 13, cut off emulsion service duct, Emulsified liquid nozzle 12 is closed.Thus can block the emulsion sprayed strip steel both sides from roll gap channelling to milling train outlet side, it is ensured that the cleaning of belt steel surface after rolling.When milling train reversely rolls, open Emulsified liquid nozzle 12 at strip steel entrance side, close compressed-air atomizer 13；Opening compressed-air atomizer 13 at milling train outlet side, close Emulsified liquid nozzle 12, its method opening and closing nozzle is to control exterior line switch valve.When emulsion injection and compressed air purge, if effect is undesirable, more preferably effect can be reached by its scope covered of Angulation changes of regulation compressed-air atomizer 13 and Emulsified liquid nozzle 12.Specific implementation process is described as a example by the operating process of Emulsified liquid nozzle 12, and the operation of compressed-air atomizer 13 is same.Emulsified liquid nozzle 12 is twisted with spanner, at this moment Emulsified liquid nozzle 12 is screwed into screwed hole further, malleation lining 11 bottom Emulsified liquid nozzle 12, lining 11 extrudes compression spring 14, thus have adjusted the injection direction of Emulsified liquid nozzle 12, and ensure that the threaded of Emulsified liquid nozzle has certain pretightning force, will not be freely rotatable.
Stretching by self locking hydraulic cylinder, the emulsifying sap cavity piston rod linked together with fixed plate and air chamber piston rod is driven to move relative to spray beam, thus change the internal emulsion cavity of spray beam and the size of compressed air cavity, the state that final control Emulsified liquid nozzle and compressed-air atomizer open or close, reach to change emulsion injection width of water curtain and compressed air purging width to adapt to the purpose of strip width change, also achieve the linkage of emulsion water curtain and compressed air purging width, more effectively remove the emulsion remained of belt steel surface, well solve the problem that existing emulsion purging is undesirable.Wherein, there are compression spring, the deflection angle of conveniently adjusted nozzle injection bottom when two kinds of nozzles are installed.The self locking hydraulic cylinder of spray beam both sides can move simultaneously, it is possible to individually moves, and it depends on the strip steel position relative to spray beam.This emulsion injection beam device is the most convenient for the on-off control of each nozzle, and compact overall structure, easy to adjust flexibly, economical and practical.
Described emulsion injection beam device has the advantages that 1. linkages achieving emulsion injection water curtain and compressed air purging width, the change of strip width can be adapted to simultaneously, solve because strip width change that the emulsion remained purging that causes is unfavorable or the problem of the wasting of resources, improve the surface quality of rolled band steel.
2. emulsified liquid injection gear and coolant emulsion liquid blowing remover are integrated on an equipment, decrease equipment, also make equipment the compactest, save much room for mill housing inside, facilitate the installation of remaining equipment to safeguard.
3. Emulsified liquid nozzle and compressed-air atomizer injection adjustable deflection angle, preferably adapted to different rolling operating modes, and the replacing of two kinds of nozzles is safeguarded the most very convenient.
4. solve spray beam internal residual emulsion at nozzle, drop onto the emulsion residue problem caused on strip steel.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (9)
1. an emulsion injection beam device, it is characterised in that include spray beam, an emulsion cavity, a compressed air cavity, two emulsifying sap cavity piston rods and two air chamber piston rods；
Described emulsion cavity and described compressed air cavity are all provided with inside described spray beam, and be arranged in parallel, two emulsifying sap cavity piston rods are respectively arranged on the two ends of described emulsion cavity, two air chamber piston rods are respectively arranged on the two ends of described compressed air cavity, wherein, the described emulsifying sap cavity piston rod and the described air chamber piston rod that are positioned at the same side are fixed in a fixed plate, described fixed plate is connected by earrings and a self locking hydraulic cylinder, and described self locking hydraulic cylinder is fixed on the side of described spray beam by base；
Described spray beam is provided with the service duct connected with described emulsion cavity and described compressed air cavity, and the end of described service duct is provided with flange；
The lower surface of described spray beam is provided with installation Emulsified liquid nozzle and the screw thread of compressed-air atomizer, described Emulsified liquid nozzle is fixed on screw thread, and connect with described emulsion cavity, described compressed-air atomizer is fixed on screw thread, and connects with described compressed air cavity.
2. emulsion injection beam device as claimed in claim 1, it is characterised in that: described spray beam is processed by steel plate.
3. emulsion injection beam device as claimed in claim 1, it is characterised in that: the position that described emulsifying sap cavity piston rod is connected with described emulsion cavity is provided with sealing ring, and the position that described air chamber piston rod is connected with described compressed air cavity is provided with sealing ring.
4. emulsion injection beam device as claimed in claim 1, it is characterised in that: described emulsifying sap cavity piston rod is also cross with the fairlead of sealing ring and the end cap that is fixed in described spray beam, and is fixed in described fixed plate by nut.
5. emulsion injection beam device as claimed in claim 1, it is characterised in that: described air chamber piston rod is also cross with the fairlead of sealing ring and the end cap that is fixed in described spray beam, and is fixed in described fixed plate by nut.
6. emulsion injection beam device as claimed in claim 1, it is characterised in that: the more described compressed-air atomizer of described Emulsified liquid nozzle is near the roll rolling strip steel.
7. the emulsion injection beam device as described in claim 1 or 6, it is characterised in that: described compressed-air atomizer is that toed-out is arranged relative to strip width direction.
8. emulsion injection beam device as claimed in claim 1, it is characterised in that: it is equipped with lining and compression spring between described Emulsified liquid nozzle and described compressed-air atomizer and described spray beam.
9. emulsion injection beam device as claimed in claim 8, it is characterised in that: it is provided with sealing device between described lining and described spray beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410759533.8A CN104607472B (en) | 2014-12-12 | 2014-12-12 | Emulsion injection beam device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410759533.8A CN104607472B (en) | 2014-12-12 | 2014-12-12 | Emulsion injection beam device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104607472A CN104607472A (en) | 2015-05-13 |
| CN104607472B true CN104607472B (en) | 2016-08-17 |
Family
ID=53142267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410759533.8A Active CN104607472B (en) | 2014-12-12 | 2014-12-12 | Emulsion injection beam device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104607472B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105363786A (en) * | 2015-12-07 | 2016-03-02 | 天津市新宇彩板有限公司 | Roller emulsion ejecting beam |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1210903A2 (en) * | 1984-06-07 | 1986-02-15 | Институт черной металлургии | Injector for atomizing lubricant |
| KR20090071136A (en) * | 2007-12-27 | 2009-07-01 | 주식회사 포스코 | Apparatus for cooling hot wire |
| CN201702187U (en) * | 2010-07-12 | 2011-01-12 | 新疆八一钢铁股份有限公司 | Compressed air purging device |
| CN102078884A (en) * | 2010-11-12 | 2011-06-01 | 北京工业大学 | High-pressure water jet steel strip cleaning device |
| CN202290807U (en) * | 2011-09-30 | 2012-07-04 | 鞍钢股份有限公司 | Adjustable high-pressure water descaling device |
| CN204396486U (en) * | 2014-12-12 | 2015-06-17 | 中冶南方工程技术有限公司 | Emulsion injection beam device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009041946A1 (en) * | 2007-09-27 | 2009-04-02 | Waterbury Farrel, A Division Of Magnum Integrated Technologies Inc. | Backing assembly for use in z-mill type rolling mills |
-
2014
- 2014-12-12 CN CN201410759533.8A patent/CN104607472B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1210903A2 (en) * | 1984-06-07 | 1986-02-15 | Институт черной металлургии | Injector for atomizing lubricant |
| KR20090071136A (en) * | 2007-12-27 | 2009-07-01 | 주식회사 포스코 | Apparatus for cooling hot wire |
| CN201702187U (en) * | 2010-07-12 | 2011-01-12 | 新疆八一钢铁股份有限公司 | Compressed air purging device |
| CN102078884A (en) * | 2010-11-12 | 2011-06-01 | 北京工业大学 | High-pressure water jet steel strip cleaning device |
| CN202290807U (en) * | 2011-09-30 | 2012-07-04 | 鞍钢股份有限公司 | Adjustable high-pressure water descaling device |
| CN204396486U (en) * | 2014-12-12 | 2015-06-17 | 中冶南方工程技术有限公司 | Emulsion injection beam device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104607472A (en) | 2015-05-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2403663B2 (en) | Method and cooling device for cooling the rollers of a roll stand | |
| US7654509B2 (en) | Desuperheater spray nozzle | |
| JP6828152B2 (en) | Cooling of rolling stand rolls | |
| EP2882542A1 (en) | Method for cleaning and/or descaling a slab or a preliminary strip by means of a descaling device, and descaling device | |
| CN103264054B (en) | Steel tube even cooling device | |
| CN103834780B (en) | A kind of horizontal liquid nitrogen direct injection forging steel cold roll deep cold treatment apparatus | |
| CN104607472B (en) | Emulsion injection beam device | |
| CN203170732U (en) | Strip steel tempering lubricant purging device | |
| CN204396486U (en) | Emulsion injection beam device | |
| CN204769410U (en) | Malt germinating box, punching screen plate for drying oven | |
| CN108906357A (en) | A kind of method of coal mining machine roller pressure stabilizing nozzle and pressure stabilizing water spray | |
| CN112317542B (en) | Atomizing and oil spraying device for roller | |
| CN201676846U (en) | Steel band surface blowing and cleaning apparatus and equipment to reel steel band | |
| CN208853046U (en) | Coal mining machine roller pressure stabilizing nozzle | |
| WO2012171514A1 (en) | Method and device for cooling a working roll | |
| CN204769913U (en) | A device for driving remaining cooling water in thermal rolling steel plate surface | |
| CN102671968A (en) | Active flow field controlling type five-machine-frame cold-rolling continuous-rolling board surface cleaning method | |
| CN211780105U (en) | Briquetting machine oil mist sprinkling system | |
| CN201308915Y (en) | Cleaning device of aluminum foil plate surface | |
| CN204276207U (en) | A kind of graphitic lubricant nozzle | |
| CN100503064C (en) | Cold continuous rolling mill outlet emulsion purging system | |
| CN211437493U (en) | Cold rolling mill roll gap purging device | |
| CN207735182U (en) | A kind of automobile door frame rolling production line automatic fuel spray device | |
| CN103111473A (en) | Six-roll cold mill ultra-wide aluminum strip surface on-line degreasing device | |
| CN110369527A (en) | A kind of cold rolling emulsified liquid jetting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |