CN105281549B - A kind of frequency converter cabinet body, frequency converter and frequency converter combining system - Google Patents

A kind of frequency converter cabinet body, frequency converter and frequency converter combining system Download PDF

Info

Publication number
CN105281549B
CN105281549B CN201510854399.4A CN201510854399A CN105281549B CN 105281549 B CN105281549 B CN 105281549B CN 201510854399 A CN201510854399 A CN 201510854399A CN 105281549 B CN105281549 B CN 105281549B
Authority
CN
China
Prior art keywords
frequency converter
cabinet
cabinet body
mounting layer
base assembly
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
CN201510854399.4A
Other languages
Chinese (zh)
Other versions
CN105281549A (en
Inventor
滕建新
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.)
Shenzhen Invt Electric Co Ltd
Original Assignee
Shenzhen Invt Electric 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 Shenzhen Invt Electric Co Ltd filed Critical Shenzhen Invt Electric Co Ltd
Priority to CN201510854399.4A priority Critical patent/CN105281549B/en
Publication of CN105281549A publication Critical patent/CN105281549A/en
Application granted granted Critical
Publication of CN105281549B publication Critical patent/CN105281549B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Inverter Devices (AREA)
  • Patch Boards (AREA)

Abstract

A kind of frequency converter cabinet body, frequency converter and frequency converter combining system, the cabinet include:Base assembly cabinet and the cabinet assembly cabinet being set to above base assembly cabinet;Cabinet assembly cabinet is followed successively by inner cavity and exocoel on the direction by backboard to door-plate, it is isolated by dismountable baffle between inner cavity and exocoel, outer intracavitary is provided with the driving plate on baffle, the first mounting layer, the second mounting layer and third mounting layer are divided into using isolation baffle plate from down to up in the vertical direction of inner cavity, it is provided with inlet conduits in first mounting layer, power cell in second mounting layer for installing frequency converter, third mounting layer are interior for radiator fan to be arranged;It is divided into the first installation cavity and the second installation cavity from down to up in base assembly cabinet vertical direction.Each structural unit in frequency converter is arranged by using the mode of layered arrangement in above-mentioned frequency converter cabinet body, so that the width dimensions of frequency converter cabinet body are smaller, occupied place is also just smaller, therefore improves space availability ratio.

Description

A kind of frequency converter cabinet body, frequency converter and frequency converter combining system
Technical field
The present invention relates to electrical equipment technical field, and in particular to a kind of frequency converter cabinet body, frequency converter and frequency converter and machine system System.
Background technology
In existing frequency converter main device design scheme, side in one line is usually taken with inverter module part in rectification module Formula is set in frequency-charger cabinet body, frequency converter made of being arranged in this way, and the whole width dimensions of single machine are larger, length and width High dimension scale is uncoordinated, and then causes the place shared by the frequency converter larger, causes the waste of space resources, when using existing When forming combining system by frequency converter traditional in technology, usually by required and machine frequency converter setting in one line, therefore meeting Cause the site area shared by combining system to further increase, causes the waste of space resources.
Invention content
In view of this, a kind of frequency converter cabinet body of offer of the embodiment of the present invention, frequency converter and frequency converter combining system, to realize Improve the space availability ratio of frequency converter.
To achieve the above object, the embodiment of the present invention provides the following technical solutions:
A kind of frequency converter cabinet body, including:
Base assembly cabinet and the cabinet assembly cabinet being set to above the base assembly cabinet;
The cabinet assembly cabinet is followed successively by inner cavity and exocoel on the direction by backboard to door-plate, the inner cavity and exocoel it Between be isolated by dismountable baffle, the outer intracavitary be used for be mounted on the baffle on driving plate, the inner cavity Vertical Square The first mounting layer, the second mounting layer and third mounting layer, first mounting layer are divided into using isolation baffle plate from down to up upwards Inlet conduits are inside provided with, is used to install the power cell of frequency converter in second mounting layer, is used in the third mounting layer In setting radiator fan;
It is divided into the first installation cavity and the second installation cavity in the base assembly cabinet vertical direction from down to up, described first For output reactance device to be arranged in installation cavity, in second installation cavity it is used to that input reactance device to be arranged.
Preferably, in above-mentioned frequency converter cabinet body, the base assembly cabinet and cabinet assembly cabinet pass through guide positioning pin Positioning, and be fixed by bolts.
Preferably, in above-mentioned frequency converter cabinet body, second mounting layer bottom is provided with walking track, the power cell Bottom be provided with it is described walking Orbit Matching ground-engaging element.
Preferably, in above-mentioned frequency converter cabinet body, the top plate of the cabinet assembly cabinet is detachable structure.
Preferably, in above-mentioned frequency converter cabinet body, further include:
Two mounting brackets being set to using removably at left and right sides of the bottom of the base assembly cabinet.
Preferably, in above-mentioned frequency converter cabinet body, further include:
It is set to two lifting cross beams of front and rear sides at the top of the cabinet assembly cabinet.
Preferably, in above-mentioned frequency converter cabinet body, the extending direction of the walking track is vertical with the door-plate.
A kind of frequency converter, using there is frequency converter cabinet body disclosed in above-mentioned any one.
Preferably, above-mentioned frequency converter further includes:
Control panel being set to the outer intracavitary, being installed on the baffle;
The display keyboard for being controlled the working condition of the frequency converter being set on the door-plate outer surface;
For be connected with the driving plate of this frequency converter and other frequency converters and machine driving plate, described and machine driving plate and institute Control panel is stated to be connected.
A kind of frequency converter combining system, including:
It is not small that N number of application, which has frequency converter cabinet body disclosed in above-mentioned any one, frequency converter as slave, the N, In 1 positive integer;
One application has frequency converter cabinet body, the frequency converter as host disclosed in above-mentioned any one;
Wherein, include as the frequency converter of host:Control being set to the outer intracavitary, being installed on the baffle Making sheet is set to control device on the control panel, being controlled for the power cell to the frequency converter;
The display keyboard for being controlled the working condition of the frequency converter being set on the door-plate outer surface;
For be connected with other frequency converters and machine driving plate;
As host the frequency converter by and between machine driving plate and the driving plate of the frequency converter for being used as slave Electrical connection.
Preferably, in above-mentioned frequency converter combining system, when being provided with mounting bracket in the frequency converter cabinet body and described hang When filling crossbeam, it is provided with the mounting hole being mutually matched on the mounting bracket and the lifting cross beam, so that adjacent two The mounting bracket connection can be used between the lifting cross beam of frequency converter.
Based on the above-mentioned technical proposal, frequency converter cabinet body provided in an embodiment of the present invention, by using the mode of layered arrangement Each structural unit in the frequency converter is set, so that the width dimensions of the frequency converter cabinet body are smaller, it is occupied Place is also just smaller, therefore improves space availability ratio.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram of frequency converter cabinet body disclosed in the embodiment of the present application;
Fig. 2 is a kind of structural schematic diagram of frequency converter cabinet body disclosed in the embodiment of the present application;
Fig. 3 is a kind of structural schematic diagram of power cell disclosed in the embodiment of the present application;
Fig. 4 is a kind of structural schematic diagram of frequency converter cabinet body disclosed in another embodiment of the application;
Fig. 5 is a kind of structural schematic diagram of frequency converter cabinet body disclosed in the another embodiment of the application;
Fig. 6 is the structural schematic diagram of mounting bracket and lifting cross beam disclosed in the embodiment of the present application;
Fig. 7 is the structural schematic diagram of frequency converter combining system disclosed in the embodiment of the present application;
Fig. 8 is the connection diagram between frequency converter combining system host, slave disclosed in the embodiment of the present application;
Fig. 9 is the vertical view of two adjacent frequency converters in frequency converter combining system disclosed in the embodiment of the present application.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
It is directed in the prior art in Design of Inverter, rectification module is usually taken in one line with inverter module part Mode be set in frequency-charger cabinet body, and the problem for causing the width dimensions of frequency converter larger, this application discloses a kind of new Frequency converter cabinet body, referring to Fig. 1 and Fig. 2, including:
Base assembly cabinet 100 and the cabinet assembly cabinet 200 for being set to 100 top of the base assembly cabinet;
The cabinet assembly cabinet 200 is described by being followed successively by inner cavity 210 and exocoel 220 on backboard to the direction of door-plate 201 It is isolated by dismountable baffle 202 between inner cavity 210 and exocoel 220, the power in the inner cavity 210 for frequency converter to be arranged Unit 204, the driving plate in the exocoel 220 for being mounted on the baffle 202, in 210 vertical direction of the inner cavity by Under to upper first mounting layer 211, the second mounting layer 212 and third mounting layer 213 are divided into using isolation baffle plate, first installation It is provided with inlet conduits 203 in layer 211, is used to install the power cell 204 of frequency converter in second mounting layer 212, it is described For radiator fan to be arranged in third mounting layer 213;
It is divided into the first installation cavity 110 and the second installation cavity from down to up in 100 vertical direction of base assembly cabinet 120, first installation cavity 110 is interior for output reactance device to be arranged, and in second installation cavity 220 is used to that input reactance to be arranged Device.
Referring to frequency converter cabinet body disclosed in the above embodiments of the present application as it can be seen that the application by using layered arrangement mode Each structural unit in the frequency converter is set, so that the width dimensions of the frequency converter cabinet body are smaller, it is occupied Place is also just smaller, therefore improves space availability ratio.
Preferably, stronger steady in order to ensure to have between the base assembly cabinet 100 and cabinet assembly cabinet 200 Qualitative, the base assembly cabinet 100 and cabinet assembly cabinet 200 in the above embodiments of the present application can pass through guide positioning pin 208 positioning, and be fixed by bolts.
It is understood that the maintenance of the power cell 204 for convenience, 212 bottom of the second mounting layer setting There are walking track 209,204 bottom of the power cell to be provided with ground-engaging element 205, the ground-engaging element 205 can be sliding rail Or traveling wheel etc. can walking mechanism, the power cell 204 can be gone out by the ground-engaging element 205 along the walking track 209 Enter the inner cavity 210, the power cell 204 can be made of rectification module, inverter module capacitance etc..Preferably, for side Just wiring, the leading-out terminal of the power cell 204 guide to side, door-plate described in the side face of the power cell 204 201.Certainly, the power cell 204 is moved out for convenience, in the above embodiments of the present application, the walking track 209 prolongs It is vertical with the door-plate 201 to stretch direction.When need repairing the power cell 204 when, after splitting out the baffle 202, you can edge The walking track 209 extracts the power cell 204 out.
It is understood that the radiator fan is safeguarded for convenience, the cabinet disclosed in the above embodiments of the present application The top plate of component cabinet 200 is detachable structure.
Preferably, the fixation of the frequency converter cabinet body for convenience, the bottom of the base assembly cabinet 100, which is provided with, adopts The mounting bracket 206 being arranged with removably, the mounting bracket 206 can be arranged at 100 bottom of base assembly cabinet The left and right sides (left and right sides is for the direction of door-plate) in portion.Of course for being moved easily, lift the frequency conversion The top of device, the cabinet assembly cabinet 200 disclosed in the above embodiments of the present application is additionally provided with lifting cross beam 207, described to hang Dress crossbeam 207 be the top that may be provided at the cabinet assembly cabinet 200 front and rear sides (front and rear sides again for For the direction of the door-plate), wherein referring to Fig. 6, it is provided with and matches in the mounting bracket 206 and lifting cross beam 207 Mounting hole, the mounting bracket 206 can be used between the lifting cross beam 207 of two neighboring frequency converter and be connected, the installation is propped up Frame 206 and lifting cross beam 207 are fixed together using bolt by the mounting hole.
By frequency converter cabinet body disclosed in the above embodiments of the present application as it can be seen that the change disclosed in the above embodiments of the present application Frequency device cabinet use layered arrangement mode so that the frequency converter cabinet body it is small, occupy little space, internal structure is compact, Space availability ratio is high, effectively increases space availability ratio;Meanwhile the design of the power cell 204 and walking track 209, greatly The maintenance efficiency for improving the transducer power component greatly is becoming since the frequency converter cabinet body is designed using layered mode In frequency device installation process can multinomial work carry out simultaneously, be greatly improved working efficiency.
It is understood that corresponding to above-mentioned frequency converter cabinet body, disclosed herein as well is using the above embodiments of the present application The frequency converter of any one disclosed frequency converter cabinet body.
Preferably, when needing to use multiple frequency converters and machine is to obtain larger power, one of frequency converter needs It is used as host, should also include as the frequency converter of host at this time:
Control panel being set to the outer intracavitary, being installed on the baffle;
The display keyboard for being controlled the working condition of the frequency converter being set on the door-plate outer surface;
For be connected with the driving plate of this frequency converter and other frequency converters and machine driving plate, described and machine driving plate and institute Control panel is stated to be connected.
It is understood that being reserved on the above-mentioned any one frequency converter of the application for installing the control panel, display The installation site of key and simultaneously machine driving plate, user can determine whether to install institute on these reserved locations according to their needs State control panel, display key and simultaneously machine driving plate.
In order to obtain larger power, it is directed to frequency converter disclosed in the above embodiments of the present application, the above-mentioned implementation of the application Example discloses a kind of frequency converter combining system, including:N number of application has any one frequency converter disclosed in the above embodiments of the present application Cabinet, frequency converter as slave, the N are the positive integer not less than 1;
One it is being used as host, using the change for having any one frequency converter cabinet body disclosed in the above embodiments of the present application Frequency device, the frequency converter used as host further include:
Control panel being set to the outer intracavitary, being installed on the baffle;
The display keyboard for being controlled the working condition of the frequency converter being set on the door-plate outer surface;
For being connected with the driving plate of this frequency converter and other frequency converters and machine driving plate A, described and machine driving plate A with The control panel a is connected.
Wherein, when frequency converter disclosed in by the embodiment of the present application forms frequency converter combining system, two kinds and machine can be used Scheme, one of which is direct and machine, at this point, being provided with without dismounting at left and right sides of the bottom of the base assembly cabinet 100 Two mounting brackets, maintain certain distance between two adjacent frequency converters at this time, referring to Fig. 9, another kind is closing-type And machine mode, at this point, the mounting bracket 206 of 100 bottom of base assembly cabinet is disassembled, by the installation branch under the dismounting Frame 206 is fixed on the lifting cross beam 207 of two adjacent frequency converters.The both ends of i.e. wherein one mounting bracket 206 are solid respectively On two lifting cross beams 207 on front side of the top of described two adjacent frequency converters, another mounting bracket 206 is solid for Dingan County Dingan County is on two lifting cross beams 207 of the top rear of described two adjacent frequency converters.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other The difference of embodiment, just to refer each other for identical similar portion between each embodiment.For frequency conversion disclosed in embodiment For device and frequency converter combining system, since it is corresponding with frequency converter cabinet body disclosed in embodiment, so the comparison of description is simple Single, related place illustrates referring to frequency-charger cabinet body portion.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one The widest range caused.

Claims (8)

1. a kind of frequency converter cabinet body, which is characterized in that including:
Base assembly cabinet and the cabinet assembly cabinet being set to above the base assembly cabinet;
The cabinet assembly cabinet is followed successively by inner cavity and exocoel on the direction by backboard to door-plate, leads between the inner cavity and exocoel Cross dismountable baffle isolation, the driving plate that the outer intracavitary is used to be arranged on the baffle, the inner cavity Vertical Square The first mounting layer, the second mounting layer and third mounting layer, first mounting layer are divided into using isolation baffle plate from down to up upwards Inlet conduits are inside provided with, is used to install the power cell of frequency converter in second mounting layer, is used in the third mounting layer In setting radiator fan;
It is divided into the first installation cavity and the second installation cavity, first installation in the base assembly cabinet vertical direction from down to up Intracavitary in second installation cavity is used to that input reactance device to be arranged for output reactance device to be arranged;
The base assembly cabinet and cabinet assembly cabinet are fixed by bolts by guide-localization finger setting;
Second mounting layer bottom is provided with walking track, and the bottom of the power cell is provided with and the walking track The ground-engaging element matched.
2. frequency converter cabinet body according to claim 1, which is characterized in that the top plate of the cabinet assembly cabinet is detachable Structure.
3. frequency converter cabinet body according to claim 1, which is characterized in that further include:
Two mounting brackets being set to using removably at left and right sides of the bottom of the base assembly cabinet.
4. frequency converter cabinet body according to claim 1, which is characterized in that further include:
It is set to two lifting cross beams of front and rear sides at the top of the cabinet assembly cabinet.
5. a kind of frequency converter, which is characterized in that include the frequency converter cabinet body described in claim 1-4 any one.
6. frequency converter according to claim 5, which is characterized in that further include:
Control panel being set to the outer intracavitary, being installed on the baffle;
The display keyboard for being controlled the working condition of the frequency converter being set on the door-plate outer surface;
For be connected with the driving plate of this frequency converter and other frequency converters and machine driving plate, described and machine driving plate and the control Making sheet is connected.
7. a kind of frequency converter combining system, which is characterized in that including:
Frequency converter described in N number of claim 5, as slave, the N are the positive integer not less than 1;
Frequency converter described in one claim 6, as host;
Wherein, as the frequency converter of host by and between machine driving plate and the driving plate of the frequency converter for being used as slave Electrical connection.
8. frequency converter combining system according to claim 7, which is characterized in that when being provided with peace in the frequency converter cabinet body When filling holder and the lifting cross beam, it is provided with the mounting hole being mutually matched on the mounting bracket and the lifting cross beam, with So that the mounting bracket connection can be used between the lifting cross beam of two adjacent frequency converters.
CN201510854399.4A 2015-11-30 2015-11-30 A kind of frequency converter cabinet body, frequency converter and frequency converter combining system Active CN105281549B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510854399.4A CN105281549B (en) 2015-11-30 2015-11-30 A kind of frequency converter cabinet body, frequency converter and frequency converter combining system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510854399.4A CN105281549B (en) 2015-11-30 2015-11-30 A kind of frequency converter cabinet body, frequency converter and frequency converter combining system

Publications (2)

Publication Number Publication Date
CN105281549A CN105281549A (en) 2016-01-27
CN105281549B true CN105281549B (en) 2018-10-23

Family

ID=55150039

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510854399.4A Active CN105281549B (en) 2015-11-30 2015-11-30 A kind of frequency converter cabinet body, frequency converter and frequency converter combining system

Country Status (1)

Country Link
CN (1) CN105281549B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106194686A (en) * 2016-08-01 2016-12-07 深圳市英威腾电气股份有限公司 The double Frequency Drive Control all-in-one of a kind of air compressor machine
CN107493008B (en) * 2017-09-06 2018-05-04 上海智驾汽车科技有限公司 The multi-angle mounting structure of network service frequency converter

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0263391B1 (en) * 1986-10-04 1993-05-05 Endress u. Hauser GmbH u. Co. Device for receiving, preparing, exploiting and transmitting electrical signals
CN201243256Y (en) * 2008-06-27 2009-05-20 宁波乐邦电气有限公司 Frequency converter cabinet
CN203522502U (en) * 2013-09-23 2014-04-02 希望森兰科技股份有限公司 Converter combined cabinet
CN203608072U (en) * 2013-12-03 2014-05-21 深圳市英威腾电气股份有限公司 High-power low voltage frequency converter and parallel operation frequency conversion system
CN104602466A (en) * 2015-01-15 2015-05-06 南车株洲电力机车研究所有限公司 Electrical cabinet for frequency converter
CN204442152U (en) * 2015-03-05 2015-07-01 深圳市英威腾电气股份有限公司 Outdoor frequency converter

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203883668U (en) * 2014-06-16 2014-10-15 中国石油化工股份有限公司 Self-cooling frequency conversion control cabinet

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0263391B1 (en) * 1986-10-04 1993-05-05 Endress u. Hauser GmbH u. Co. Device for receiving, preparing, exploiting and transmitting electrical signals
CN201243256Y (en) * 2008-06-27 2009-05-20 宁波乐邦电气有限公司 Frequency converter cabinet
CN203522502U (en) * 2013-09-23 2014-04-02 希望森兰科技股份有限公司 Converter combined cabinet
CN203608072U (en) * 2013-12-03 2014-05-21 深圳市英威腾电气股份有限公司 High-power low voltage frequency converter and parallel operation frequency conversion system
CN104602466A (en) * 2015-01-15 2015-05-06 南车株洲电力机车研究所有限公司 Electrical cabinet for frequency converter
CN204442152U (en) * 2015-03-05 2015-07-01 深圳市英威腾电气股份有限公司 Outdoor frequency converter

Also Published As

Publication number Publication date
CN105281549A (en) 2016-01-27

Similar Documents

Publication Publication Date Title
CN103138184A (en) Locomotive converter cabinet
CN105281549B (en) A kind of frequency converter cabinet body, frequency converter and frequency converter combining system
CN204030990U (en) Lamination spraying row mixes the new power converter unit using with composite bus bar
CN206302675U (en) A kind of mounting structure of charging module
CN203775051U (en) IGBT power module structure used for photovoltaic inversion
CN105332352A (en) On-site protection guardrail for repairing outdoor electrical equipment
CN103532030B (en) Distribution box with movable slide rail type installing plate
CN103236778B (en) Modularized combined power supply device
CN202840914U (en) Combined-type frequency converter
CN211785885U (en) Modularization operation panel and frequency conversion resonance high-voltage test device
CN108092526A (en) A kind of power module and the mounting structure and installation method of capacitance module cooperation
CN105379035A (en) Power cabinet for medium-high voltage inverters
CN207884117U (en) A kind of electrical equipment rack of front maintenance inverter module
CN207519043U (en) A kind of Simple machinery room capacitive
CN102082496A (en) Converter cabinet for wind power generation
CN206895074U (en) A kind of drawer type electric control cabinet
CN206099361U (en) Diesel generating set's parallel machine cabinet
CN204046442U (en) High-power narrow body structure frequency converter
CN202772808U (en) Photovoltaic inverter inversion module mounting structure
CN205544885U (en) Power unit of high pressure frequency converter
CN206322583U (en) A kind of capacitor installation structure
CN205828934U (en) A kind of combined metal armored withdraw type switch cubicle
CN204538963U (en) A kind of high power D C-DC conversion equipment
CN205377056U (en) Low -voltage switchgear's semi -open type lamina tecti
CN204614971U (en) A kind of modular fixture connecting for bus bar and fix

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant