CN210964789U - Automatic adding device for medicament - Google Patents

Automatic adding device for medicament Download PDF

Info

Publication number
CN210964789U
CN210964789U CN201921729448.1U CN201921729448U CN210964789U CN 210964789 U CN210964789 U CN 210964789U CN 201921729448 U CN201921729448 U CN 201921729448U CN 210964789 U CN210964789 U CN 210964789U
Authority
CN
China
Prior art keywords
medicament
motor
box
mixing
material conveying
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
CN201921729448.1U
Other languages
Chinese (zh)
Inventor
沈国早
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.)
Fujian Jieda Environmental Protection Co ltd
Original Assignee
Fujian Jieda Environmental Protection 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 Fujian Jieda Environmental Protection Co ltd filed Critical Fujian Jieda Environmental Protection Co ltd
Priority to CN201921729448.1U priority Critical patent/CN210964789U/en
Application granted granted Critical
Publication of CN210964789U publication Critical patent/CN210964789U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Mixers Of The Rotary Stirring Type (AREA)
  • Accessories For Mixers (AREA)

Abstract

The utility model discloses an automatic medicament feeding device, the structure of which comprises a mixing and milling device, in order to solve the problem that the solid medicament contains larger particles, which causes the solid medicament to be mixed and dissolved with liquid for a long time, and the efficiency is low, the medicament is sequentially fed into a hopper by arranging the mixing and milling device on the top of the hopper, the medicament in the hopper sequentially falls to the inner side of a mixing bin, a button on the inner side of a control box is pressed to start a second motor, the second motor drives a stirring shaft through an output shaft to mix and stir the medicament, then the mixed and stirred medicament slides down through a traction plate, the downward impact force of the medicament causes a rotary disc to relatively rotate through a rotating shaft to mill the gliding medicament, the medicament on the milling rear side falls into a material conveying plate, the vibration motor is started by pressing the control box to cause the medicament to slide down to an electric control valve along the material conveying plate in an inclined way, the, the beneficial effects of facilitating the contact between the medicine and the liquid for quick dissolution and improving the preparation efficiency of the medicament are achieved.

Description

Automatic adding device for medicament
Technical Field
The utility model relates to a sewage treatment technical field, concretely relates to automatic feeder apparatus of throwing of medicament.
Background
Can produce certain dirty waste water in industrial production, in order to reach the environmental protection requirement, need handle dirty waste water, need add the medicament for equipment when dirty waste water treatment, adopt artifical manual reinforced at the very beginning, this kind of mode can not satisfy the actual production requirement, has just appeared the medicament after that and has added the device from throwing in, the automatic of the medicament of being convenient for is put in.
The existing medicament self-adding device is used in the medicament mixing preparation process, generally, solid medicaments are directly added into liquid, stirring is carried out by a motor through stirring blades so that the solid medicaments and the liquid are mixed to prepare the medicament, the medicament is conveyed into sewage equipment through a water pumping pipe, and in the solid medicament and liquid mixing and dissolving process, the solid medicaments contain larger granular medicaments, so that the solid medicaments and the liquid are mixed and dissolved for a long time, and the efficiency is low.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In order to overcome the defects of the prior art, the automatic medicament feeding device is provided, the problems that solid medicaments and liquid are mixed and dissolved for a long time and the efficiency is low due to the fact that the solid medicaments contain larger particles are solved, and the beneficial effects that the medicaments are contacted with the liquid to be quickly dissolved and the preparation efficiency of the medicaments is improved are achieved.
(II) technical scheme
The utility model discloses a following technical scheme realizes: the utility model provides a device for automatically adding medicament, which comprises a box body,
a partition for separating the medicine from the liquid;
the mixing and milling device is used for grinding the medicines into powder;
the metering pump is used for carrying out limited and timed delivery on the medicament;
furthermore, a liquid level sensor is arranged on the left side of the bottom of the metering pump.
Further, box top right side is pegged graft with the hopper, box top rear side is provided with sealed lid, box top left side is pegged graft with first motor, box top left end and control box bolt fastening, the bottom half right side is pegged graft with the conveyer pipe, bottom half four corners and universal wheel bolt fastening, box middle part inboard and baffle welding, baffle right side top is provided with mixed milling device, it is provided with the measuring pump to mix milling device bottom, measuring pump bottom water inlet is pegged graft with the medicament storehouse through taking out the pipe, measuring pump top delivery port is pegged graft with the box through the conveyer pipe, output shaft and stirring leaf normal running fit are passed through to first motor bottom, first motor and measuring pump are connected with the control box electricity, the control box is connected with the power cord electricity.
Further, the mixing and milling device comprises a frame, a mixing bin, a second motor, a stirring shaft, a traction plate, a milling disc, a material conveying plate, a vibrating motor, an electric control valve and an anti-sticking pad, wherein the mixing bin is arranged on the inner side of the top of the frame, the left side of the mixing bin is connected with the second motor in an inserting mode, the right side of the second motor is in running fit with the stirring shaft through an output shaft, the traction plate is arranged on the inner side of the bottom of the mixing bin, the milling discs are arranged on the left side and the right side of the bottom of the traction plate, the material conveying plate is arranged on the bottom of the frame, the bottom of the material conveying plate is fixed with the vibrating motor through bolts, the left side of the top of the frame is embedded with the electric control valve, the inner side of the material conveying plate is bonded with the anti-sticking pad, the top end of, the rotary table is connected with the rotary shaft in a rotating mode, the middle of the rotary table is connected with the inner wall of the mixing bin in an inserting mode through the rotary shaft, and the second motor, the vibrating motor and the electric control valve are electrically connected with the control box.
Further, the mixing bin is funnel-shaped, and the top hopper of the mixing bin is vertically aligned with the hopper.
Furthermore, striker plates are arranged on the left side and the right side of the bottom of the traction plate, and the distance between each striker plate and the grinding disc is 3 mm.
Further, the number of the grinding discs is 2, and the sizes of the grinding discs are all consistent.
Furthermore, the material conveying plates are placed in an inclined angle of 45 degrees, and the top of each material conveying plate is aligned with the feed opening of the mixing bin.
Furthermore, the inner diameter of the abrasive belt is consistent with the outer diameter of the rotary table, and fine particles are arranged on the surface of the abrasive belt.
Further, the first motor and the second motor are AKM series, and the specific models are designed or customized according to actual use conditions.
Furthermore, the rotating shaft is made of No. 45 steel, so that the rotating shaft is high in hardness and strong in corrosion resistance.
(III) advantageous effects
Compared with the prior art, the utility model, following beneficial effect has:
in order to solve the problems that the solid medicine contains larger-particle medicine, which causes long time consumption and low efficiency in the mixing and dissolving of the solid medicine and liquid, a mixing and milling device is arranged at the top of a hopper, the medicine is sequentially put into the hopper, the medicine in the hopper sequentially falls to the inner side of a mixing bin, a button on the inner side of a control box is pressed to start a second motor, the second motor drives a stirring shaft through an output shaft to mix, stir and crush the medicine, the mixed and crushed medicine slides downwards through a traction plate, the downward impact force of the medicine causes a rotary disc to relatively rotate through a rotating shaft to mill the medicine sliding downwards, the medicine on the side after being milled falls into a material conveying plate, a vibration motor is started by pressing the control box to cause the medicine to slide downwards along the material conveying plate to an electric control valve, the electric control valve is pressed to expand to facilitate the medicine to enter a medicine, the beneficial effect of improving the preparation efficiency of the medicament is achieved.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the cross-sectional structure of the case of the present invention;
FIG. 3 is a schematic structural view of the mixing and milling device of the present invention;
FIG. 4 is a schematic view of a material conveying plate structure of the present invention;
fig. 5 is a schematic structural view of the milling disc of the present invention.
In the figure: the device comprises a box body-1, a hopper-2, a sealing cover-3, a first motor-4, a control box-5, a conveying pipe-6, a universal wheel-7, a partition plate-8, a mixing and grinding device-9, a metering pump-10, a pumping pipe-11, a medicament bin-12, a stirring blade-13, a power wire-14, a frame-91, a mixing bin-92, a second motor-93, a stirring shaft-94, a traction plate-95, a grinding disc-96, a conveying plate-97, a vibrating motor-98, an electric control valve-99, an anti-sticking pad-910, a rotary disc-961, an abrasive belt-962 and a rotating shaft-963.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the present invention provides an automatic drug adding device: comprises a box body 1 and a plurality of connecting rods,
a partition 8 for separating the medicine from the liquid;
a mixing and milling device 9 for milling the medicine into powder;
the metering pump 10 is used for carrying out limited quantity and timed delivery on the medicament;
wherein, the left side of the bottom of the metering pump 10 is provided with a liquid level sensor.
Wherein the right side of the top end of the box body 1 is spliced with a hopper 2, the rear side of the top of the box body 1 is provided with a sealing cover 3, the left side of the top of the box body 1 is spliced with a first motor 4, the left end of the top end of the box body 1 is fixed with a control box 5 through a bolt, the right side of the bottom of the box body 1 is spliced with a conveying pipe 6, four corners of the bottom of the box body 1 are fixed with universal wheels 7 through bolts, the inner side of the middle part of the box body 1 is welded with a baffle plate 8, the top of the right side of the baffle plate 8 is provided with a mixing and grinding device 9, the bottom of the mixing and grinding device 9 is provided with a metering pump 10, a water inlet at the bottom of the metering pump 10 is spliced with a medicament bin 12 through a pumping pipe 11, a water outlet at the top of, the control box 5 is electrically connected with a power line 14.
Wherein, the mixing and milling device 9 comprises a frame 91, a mixing bin 92, a second motor 93, a stirring shaft 94, a traction plate 95, a milling disc 96, a material conveying plate 97, a vibration motor 98, an electric control valve 99 and an anti-sticking pad 910, the inner side of the top of the frame 91 is provided with the mixing bin 92, the left side of the mixing bin 92 is connected with the second motor 93 in an inserting way, the right side of the second motor 93 is in running fit with the stirring shaft 94 through an output shaft, the inner side of the bottom of the mixing bin 92 is provided with the traction plate 95, the left side and the right side of the bottom of the traction plate 95 are provided with the milling disc 96, the bottom of the frame 91 is provided with the material conveying plate 97, the bottom of the material conveying plate 97 is fixed with the vibration motor 98 through bolts, the left side of the top of the frame 91 is embedded with the electric control valve 99, the inner side of the material, the grinding disc 96 comprises a rotary disc 961, a grinding belt 962 and a rotating shaft 963, the outer diameter of the rotary disc 961 is bonded with the grinding belt 962, the middle part of the rotary disc 961 is rotatably connected with the rotating shaft 963, the middle part of the rotary disc 961 is inserted into the inner wall of the mixing bin 92 through the rotating shaft 963, and the second motor 93, the vibration motor 98 and the electric control valve 99 are electrically connected with the control box 5.
Wherein, mixing chamber 92 is funnel-shaped, and the hopper at the top of mixing chamber 92 is vertically aligned with hopper 2, is favorable to the mixing of medicine and grinds.
Wherein, the left and right sides of the bottom of the traction plate 95 is provided with a baffle plate, and the baffle plate is 3mm away from the grinding disc 96, which is beneficial to guiding the material to fall.
Wherein, mill 96 is provided with 2, and mill 96 all is unanimous in size, is favorable to milling great granule in the medicine.
The material conveying plate 97 is arranged at an inclined angle of 45 degrees, and the top of the material conveying plate 97 is aligned with the feed opening of the mixing bin 92, so that the medicine can enter the medicine bin 12.
The inner diameter of the abrasive belt 962 is consistent with the outer diameter of the rotary disc 961, and fine particles are arranged on the surface of the abrasive belt 962, so that the grinding of the medicament is facilitated.
The first motor 4 and the second motor 93 are AKM series, and the specific models are designed or customized according to actual use conditions.
The rotating shaft 963 is made of No. 45 steel, and is high in hardness and strong in corrosion resistance.
Figure BDA0002234483690000061
According to the table, the rotating shaft 963 is made of No. 45 steel, so that the strength, the wear resistance and the corrosion resistance of the rotating shaft are greatly enhanced, and the service life of the rotating shaft is prolonged.
The metering pump 10 described in this patent is also called quantitative pump or proportional pump, the metering pump can meet the requirements of various strict technological processes, the flow rate can be steplessly regulated within the range of 0-100%, and is used for conveying liquid (especially corrosive liquid), and is a special volumetric pump, and the metering pump is a fluid conveying machine, and its outstanding characteristics are that it can retain constant flow rate irrelevant to discharge pressure, and can simultaneously implement the functions of conveying, metering and regulating, so that it can simplify production technological process, and can use several metering pumps, and can input several media into the technological process according to accurate proportion to mix them, and due to its self-salient, the metering pump can be extensively used in various industrial fields of petrochemical industry, pharmacy and food, etc..
The working principle is as follows: before use, firstly, a pushing medicament automatic adding device is moved to a proper position through a universal wheel 7, a power line 14 is connected with an external power supply to provide sufficient kinetic energy for the operation of equipment, a conveying pipe 6 is butted with a sewage treatment device, when medicaments are required to be mixed and milled, a mixing and milling device 9 is arranged at the top of a hopper 2, the medicaments are sequentially added into the hopper 2, the medicaments in the hopper 2 sequentially fall to the inner side of a mixing bin 92, a key on the inner side of a control box 5 is pressed to start a second motor 93, the second motor 93 drives a stirring shaft 94 through an output shaft to mix, stir and crush the medicaments, then the mixed and crushed medicaments slide down through a traction plate 95, the downward impact force of the medicaments causes a rotary disc 961 and a rotary shaft 963 to be matched and relatively rotate to mill the medicaments sliding down through an abrasive belt 962, the medicaments on the grinding side fall into a conveying plate 97, and an anti-sticking pad 910 on the surface of the, the vibration motor 98 is started by pressing the control box 5, the vibration motor 98 generates a sloshing force through the inner eccentric block to knock the material conveying plate 97, so that the medicine slides down to the electric control valve 99 along the material conveying plate 97 in an inclined way, the electric control valve 99 is unfolded by pressing the control box 5, the medicine can conveniently enter the medicine bin 12, when the medicine completely enters the medicine bin 12, the electric control valve 99 is closed, the sealing cover 3 is opened, and a proper amount of liquid is added, then, a key on the inner side of the control box 5 is pressed to start the first motor 4, the first motor 4 drives the stirring blade 13 through the output shaft to enable the medicine powder and the liquid to be rapidly mixed and dissolved to prepare a medicine, finally, the conveying time and the conveying amount are set through the control box 5, the medicine in the medicine cabin 12 is pumped through the pumping pipe 11 on the inner side of the water inlet of the metering pump 10 and is conveyed into sewage treatment equipment through the conveying pipe 6 on the water outlet of the metering pump 10, the beneficial effects of facilitating the contact between the medicine and the liquid for quick dissolution and improving the preparation efficiency of the medicament are achieved.
The basic principle and the main characteristics of the utility model and the advantages of the utility model have been shown and described above, and the utility model discloses the standard part that uses all can purchase from the market, and dysmorphism piece all can be customized according to the record of the description with the drawing, and the concrete connection mode of each part all adopts conventional means such as ripe bolt rivet among the prior art, welding, and machinery, part and equipment all adopt prior art, conventional model, and conventional connection mode in the prior art is adopted in addition to circuit connection, and the details are not repeated here.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (8)

1. The utility model provides an automatic feeder apparatus of throwing of medicament, includes box (1), its characterized in that still includes:
a separator (8) for separating the drug from the liquid;
a mixing and milling device (9) for milling the medicine into powder;
the metering pump (10) is used for carrying out limited and timed delivery on the medicament;
wherein, a liquid level sensor is arranged on the left side of the bottom of the metering pump (10).
2. The automatic dosing device of a medicament as claimed in claim 1, wherein: the utility model discloses a chemical agent mixing and grinding device, including box (1), hopper (2), sealing cover (3), box (1) top right side, box (1) top left side and first motor (4) are pegged graft, box (1) top left end and control box (5) bolt fastening, box (1) bottom right side and conveyer pipe (6) are pegged graft, box (1) bottom four corners and universal wheel (7) bolt fastening, box (1) middle part inboard and baffle (8) welding, baffle (8) right side top is provided with mixed grinding device (9), mixed grinding device (9) bottom is provided with measuring pump (10), measuring pump (10) bottom water inlet is pegged graft through pumping pipe (11) and medicament storehouse (12), measuring pump (10) top delivery port is pegged graft through conveyer pipe (6) and box (1), the bottom of the first motor (4) is in running fit with the stirring blade (13) through an output shaft, the first motor (4) and the metering pump (10) are electrically connected with the control box (5), and the control box (5) is electrically connected with the power line (14).
3. The automatic dosing device of a medicament as claimed in claim 1, wherein: the mixing and milling device (9) comprises a frame (91), a mixing bin (92), a second motor (93), a stirring shaft (94), a traction plate (95), a milling disc (96), a material conveying plate (97), a vibration motor (98), an electric control valve (99) and an anti-sticking pad (910), wherein the mixing bin (92) is arranged on the inner side of the top of the frame (91), the left side of the mixing bin (92) is connected with the second motor (93) in an inserting mode, the right side of the second motor (93) is in running fit with the stirring shaft (94) through an output shaft, the traction plate (95) is arranged on the inner side of the bottom of the mixing bin (92), the milling discs (96) are arranged on the left side and the right side of the bottom of the traction plate (95), a material conveying plate (97) is arranged on the bottom of the frame (91), the bottom of the material conveying plate (97) is fixed with the vibration motor (98), the inner side of the material conveying plate (97) is bonded with an anti-sticking pad (910), the top end of the frame (91) is vertically inserted into the hopper (2), the outer side of the electric control valve (99) is embedded and matched with the inner wall of the partition plate (8), the grinding disc (96) comprises a rotary disc (961), an abrasive belt (962) and a rotary shaft (963), the outer diameter of the rotary disc (961) is bonded with the abrasive belt (962), the middle part of the rotary disc (961) is rotatably connected with the rotary shaft (963), the middle part of the rotary disc (961) is inserted into the inner wall of the mixing bin (92) through the rotary shaft (963), and the second motor (93), the vibrating motor (98) and the electric control valve (99) are electrically connected with the control box (.
4. The automatic dosing device of a medicament as claimed in claim 3, wherein: the mixing bin (92) is funnel-shaped, and the hopper at the top of the mixing bin (92) is vertically aligned with the hopper (2).
5. The automatic dosing device of a medicament as claimed in claim 3, wherein: the left side and the right side of the bottom of the traction plate (95) are provided with material baffle plates, and the distance between the material baffle plates and the grinding disc (96) is 3 mm.
6. The automatic dosing device of a medicament as claimed in claim 3, wherein: the number of the grinding discs (96) is 2, and the sizes of the grinding discs (96) are all consistent.
7. The automatic dosing device of a medicament as claimed in claim 3, wherein: the material conveying plate (97) is placed in an inclined 45-degree mode, and the top of the material conveying plate (97) is aligned to the feed opening of the mixing bin (92).
8. The automatic dosing device of a medicament as claimed in claim 3, wherein: the inner diameter of the abrasive belt (962) is consistent with the outer diameter of the rotary disc (961), and fine particles are arranged on the surface of the abrasive belt (962).
CN201921729448.1U 2019-10-15 2019-10-15 Automatic adding device for medicament Active CN210964789U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921729448.1U CN210964789U (en) 2019-10-15 2019-10-15 Automatic adding device for medicament

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921729448.1U CN210964789U (en) 2019-10-15 2019-10-15 Automatic adding device for medicament

Publications (1)

Publication Number Publication Date
CN210964789U true CN210964789U (en) 2020-07-10

Family

ID=71440557

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921729448.1U Active CN210964789U (en) 2019-10-15 2019-10-15 Automatic adding device for medicament

Country Status (1)

Country Link
CN (1) CN210964789U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022036805A1 (en) * 2020-08-19 2022-02-24 广东美景环境科技有限公司 Efficient mixing device for sewage treatment chemicals
CN114259751A (en) * 2021-11-20 2022-04-01 安徽华智生物制药有限公司 Purification device and purification method for bilirubin production
CN116351296A (en) * 2023-02-14 2023-06-30 江苏矽研半导体科技有限公司 A step by step stirring device that adds for derusting activator production

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022036805A1 (en) * 2020-08-19 2022-02-24 广东美景环境科技有限公司 Efficient mixing device for sewage treatment chemicals
CN114259751A (en) * 2021-11-20 2022-04-01 安徽华智生物制药有限公司 Purification device and purification method for bilirubin production
CN116351296A (en) * 2023-02-14 2023-06-30 江苏矽研半导体科技有限公司 A step by step stirring device that adds for derusting activator production
CN116351296B (en) * 2023-02-14 2024-01-05 江苏矽研半导体科技有限公司 A step by step stirring device that adds for derusting activator production

Similar Documents

Publication Publication Date Title
CN210964789U (en) Automatic adding device for medicament
CN111871319A (en) High-efficient mixing arrangement of sewage treatment medicine
CN209476047U (en) A kind of fast dissolving device in the production of konjaku rose dietary fiber
KR101473867B1 (en) manufacture machine for powdered red pepper
CN214681211U (en) Liquid food stirring device for food detection
CN218608973U (en) Stirring device capable of automatically feeding medicine along with water inflow change
CN210787736U (en) Magnetic separator
CN212142568U (en) High-efficient reation kettle
CN214687209U (en) Slurry mixing device for steam-pressurized concrete block production
CN209576630U (en) A kind of reaction kettle feeding system
CN213222034U (en) High-efficient mixing arrangement of sewage treatment medicine
CN211337627U (en) Anti-caking feeding screw machine
CN205340623U (en) Take loading attachment's food processing mixer
CN212882640U (en) High-efficient grinder of ceramic pigment
CN211487224U (en) Feed additive production is with high-efficient compounding equipment
CN2910937Y (en) Full automatic flow-line honeycomb briquette production machine
CN208912277U (en) A kind of nylon complex class packaging bag processing Solid state fermentation device
CN208054495U (en) A kind of feeding machine of feed mixing device
CN213700248U (en) Vertical powder mill for powder coating
CN206751882U (en) A kind of metal pit wood raw material briquetting machine
CN219849924U (en) Batching device for stirring ore mill
CN216727088U (en) Composite environment-friendly material raw material mixing device
CN216093161U (en) Agitating unit for pharmaceutical chemistry is synthetic
CN219328509U (en) Novel bin cube weighing device
CN208771574U (en) A kind of paint mill device

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant