CN114873531A - Electric power overhaul device - Google Patents

Electric power overhaul device Download PDF

Info

Publication number
CN114873531A
CN114873531A CN202210538937.9A CN202210538937A CN114873531A CN 114873531 A CN114873531 A CN 114873531A CN 202210538937 A CN202210538937 A CN 202210538937A CN 114873531 A CN114873531 A CN 114873531A
Authority
CN
China
Prior art keywords
adjusting unit
unit
lifting
electric power
maintenance platform
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.)
Granted
Application number
CN202210538937.9A
Other languages
Chinese (zh)
Other versions
CN114873531B (en
Inventor
袁鹏
赵洪丹
郑宇�
高峰
李卓
王阔
李国波
王玉
唐健翔
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.)
Liaoyuan Power Supply Co Of State Grid Jilinsheng Electric Power Supply Co
State Grid Corp of China SGCC
Original Assignee
Liaoyuan Power Supply Co Of State Grid Jilinsheng Electric Power Supply Co
State Grid Corp of China SGCC
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 Liaoyuan Power Supply Co Of State Grid Jilinsheng Electric Power Supply Co, State Grid Corp of China SGCC filed Critical Liaoyuan Power Supply Co Of State Grid Jilinsheng Electric Power Supply Co
Priority to CN202210538937.9A priority Critical patent/CN114873531B/en
Publication of CN114873531A publication Critical patent/CN114873531A/en
Application granted granted Critical
Publication of CN114873531B publication Critical patent/CN114873531B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/042Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations actuated by lazy-tongs mechanisms or articulated levers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F13/00Common constructional features or accessories
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F17/00Safety devices, e.g. for limiting or indicating lifting force
    • B66F17/006Safety devices, e.g. for limiting or indicating lifting force for working platforms
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B3/00Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)

Abstract

Electric power is with overhauing device belongs to electric power and overhauls technical field, and aim at solves the bearing capacity that prior art exists poor and the problem of empting appears. The electric power overhaul device of the present invention includes: the traveling unit is a motor vehicle; an overhaul stand; the angle adjusting unit is arranged at the lower end of the maintenance platform, and the inclination angle of the maintenance platform is adjusted through the angle adjusting unit; the lifting adjusting unit is arranged at the lower end of the angle adjusting unit and drives the angle adjusting unit and the maintenance platform to integrally ascend or descend; and a position adjusting unit provided on a rear panel of a body of the motor vehicle; the lifting adjusting unit, the angle adjusting unit and the maintenance platform are adjusted to be deep in the traveling direction of the vehicle and supported with the ground through the position adjusting unit.

Description

Electric power overhaul device
Technical Field
The invention belongs to the technical field of electric power overhaul, and particularly relates to an overhaul device for electric power.
Background
The electric power system is an electric energy production and consumption system which consists of links such as a power plant, a power transmission and transformation line, a power supply and distribution station, power utilization and the like. The function of the device is to convert the primary energy of the nature into electric energy through a power generation device, and then supply the electric energy to each user through power transmission, power transformation and power distribution. In order to realize the function, the power system is also provided with corresponding information and control systems at each link and different levels, and the production process of the electric energy is measured, regulated, controlled, protected, communicated and scheduled so as to ensure that users obtain safe and high-quality electric energy.
For guaranteeing electric power system's normal operating, generally need overhaul whole, electric power overhauls mainly to divide into following several maintenance parts: the power generation system comprises a power generation part, a power supply part, a power transformation part and a power distribution part, wherein each part is responsible for special personnel. The equipment for maintenance is also different, and corresponding devices, elevators or lifting tables need to be matched for maintenance at high positions. Chinese patent publication No. CN107416739A discloses a technical scheme of an electric power overhaul platform and an electric power overhaul vehicle, where the overhaul platform includes a base, a turntable, a vertical telescopic unit, a horizontal telescopic unit, and an operation table; the carousel sets up on the base, and can both be at the base horizontal rotation, and vertical flexible unit is fixed to be set up on the carousel, and can follow vertical direction and stretch out and draw back, and horizontal flexible unit is fixed to be set up on vertical flexible unit top, and can follow the horizontal direction and stretch out and draw back, and the fixed free end that sets up at horizontal flexible unit of operation panel. The operation belt is driven to move along the horizontal direction through the horizontal telescopic unit, but the problem of poor bearing capacity and toppling over can be caused due to the fact that the gravity center of the maintenance platform deviates.
Disclosure of Invention
The invention aims to provide an electric power overhaul device, which solves the problems of poor bearing capacity and toppling in the prior art.
In order to achieve the above object, an electric power inspection apparatus according to the present invention includes:
the traveling unit is a motor vehicle;
an overhaul stand;
the angle adjusting unit is arranged at the lower end of the maintenance platform, and the inclination angle of the maintenance platform is adjusted through the angle adjusting unit;
the lifting adjusting unit is arranged at the lower end of the angle adjusting unit and drives the angle adjusting unit and the maintenance platform to integrally ascend or descend;
and a position adjusting unit provided on a rear panel of a body of the motor vehicle; the lifting adjusting unit, the angle adjusting unit and the maintenance platform are adjusted to be deep in the traveling direction of the vehicle and supported with the ground through the position adjusting unit.
The service rack includes:
a table body;
and the fences are uniformly distributed on the periphery of the upper surface of the table body.
The maintenance platform is characterized by further comprising a protective cover arranged on the periphery of the platform body.
The angle adjusting unit includes:
the maintenance platform is arranged on one side edge of the front end of the advancing unit in the advancing direction and is in running fit with the adjusting box;
and the third pushing cylinder is arranged in the adjusting box along the vertical direction, one end of the third pushing cylinder is connected with the bottom surface in the adjusting box, the other end of the third pushing cylinder is hinged with the lower end surface of the maintenance platform, and the hinged position is located at the tail end position of the maintenance platform along the advancing direction of the advancing unit.
The lift adjustment unit includes:
a lifting base;
and an X-bar mechanism arranged between the lifting base and the angle adjusting unit.
The position adjustment unit includes:
a lifting structure which drives the lifting adjusting unit, the angle adjusting unit and the whole maintenance platform to lift up or descend along the front end of the advancing direction of the advancing unit;
and a pushing structure for pushing the lifting adjusting unit, the angle adjusting unit and the maintenance platform to slide out along the rear part of the advancing direction of the advancing unit.
The lifting structure comprises:
the tail end of the adjusting seat in the advancing direction is matched with the tail end of a rear plate of the vehicle body of the advancing unit in a rotating mode through a hinge shaft, and the lifting adjusting unit, the angle adjusting unit and the overhaul platform are integrally positioned on the adjusting seat;
and the first pushing cylinder is arranged between the adjusting seat and the rear vehicle plate, and the adjusting seat is pushed to rotate around the hinge shaft by the stretching of the pushing cylinder.
The pushing structure includes:
the sliding rail is arranged on the upper end surface of the adjusting seat of the lifting structure and is arranged along the advancing direction of the advancing unit;
the sliding strip is in sliding fit with the sliding rail and arranged on the lower end face of the lifting base of the lifting adjusting unit;
and the second pushing cylinder is arranged on the adjusting seat along the advancing direction, one end of the second pushing cylinder is fixed on the adjusting seat, and the other end of the second pushing cylinder is connected with the side wall of the lifting base of the lifting adjusting unit.
The quantity of slide rail and draw runner is two.
The invention has the beneficial effects that: the integral structural design of the electric power overhaul device can realize that the overhaul action table slides out relative to the vehicle body, so that the working range of the overhaul device can be indirectly enlarged, and meanwhile, the support action position of the overhaul table and the overhaul table are positioned on the same vertical line after the overhaul table slides out, so that the problems of unstable center of gravity and poor bearing capacity caused by axis shift are avoided; in addition, in the process of sliding the maintenance platform out of the vehicle body, the maintenance platform of the maintenance device can be always kept in a horizontal state through the cooperation of the first pushing cylinder and the third pushing cylinder, and the problem that the human body safety is damaged due to the inclination of the maintenance platform is avoided.
Drawings
FIG. 1 is a schematic view of the overall structure of an electric power overhaul device according to the present invention;
FIG. 2 is a schematic diagram of a lifting structure of the electric power overhaul device of the present invention in a lifted state;
FIG. 3 is a schematic structural view of a part of a pushing structure pushing out an inspection table of the electric power inspection device of the present invention;
wherein: 1. the device comprises a traveling unit, 101, a vehicle body, 102, a rear vehicle plate, 2, a position adjusting unit, 201, an adjusting seat, 202, a hinge shaft, 203, a first pushing cylinder, 204, a slide bar, 205, a second pushing cylinder, 3, a lifting adjusting unit, 301, a lifting base, 302, an X rod mechanism, 4, an angle adjusting unit, 401, an adjusting box, 402, a third pushing cylinder, 5, an overhaul table, 501, a table body, 502 and a fence.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
Referring to fig. 1 to 3, an electric power overhaul apparatus of the present invention includes:
the traveling unit 1 is a motor vehicle;
an overhaul stand 5;
the angle adjusting unit 4 is arranged at the lower end of the maintenance platform 5, and the inclination angle of the maintenance platform 5 is adjusted through the angle adjusting unit 4;
the lifting adjusting unit 3 is arranged at the lower end of the angle adjusting unit 4, and the angle adjusting unit 4 and the maintenance platform 5 are driven to integrally lift or descend by the lifting adjusting unit 3;
and a position adjusting unit 2 provided on a rear panel 102 of a body 101 of the motor vehicle; the lifting adjusting unit 3, the angle adjusting unit 4 and the maintenance platform 5 are adjusted by the position adjusting unit 2 to be deep in the traveling direction of the vehicle and supported with the ground.
The service desk 5 includes:
a table body 501;
and fences 502 uniformly distributed around the upper surface of the table body 501.
The maintenance platform 5 further comprises a protective cover arranged on the periphery of the platform body 501, and the protective cover plays a role in protection in the maintenance process.
The angle adjusting unit 4 includes:
the maintenance platform 5 is positioned on one side edge of the front end of the advancing unit 1 in the advancing direction and is in running fit with the adjusting box 401;
and the third pushing cylinder 402 is arranged inside the adjusting box 401 and is arranged along the vertical direction, one end of the third pushing cylinder 402 is connected with the bottom surface inside the adjusting box 401, the other end of the third pushing cylinder 402 is hinged with the lower end surface of the maintenance platform 5, and the hinged position is located at the tail end position of the maintenance platform 5 along the advancing direction of the advancing unit 1.
The lift adjustment unit 3 includes:
a lifting base 301;
and an X-bar mechanism 302 provided between the elevating base 301 and the angle adjusting unit 4.
The position adjustment unit 2 includes:
a lifting structure which drives the lifting adjusting unit 3, the angle adjusting unit 4 and the maintenance platform 5 to integrally lift or descend along the front end of the advancing direction of the advancing unit 1;
and a pushing structure for pushing the lifting adjusting unit 3, the angle adjusting unit 4 and the maintenance platform 5 to slide out along the rear part of the advancing direction of the advancing unit 1.
The lifting structure comprises:
an adjusting seat 201, wherein the tail end of the adjusting seat 201 in the traveling direction is rotatably matched with the tail end of the rear plate 102 of the vehicle body 101 of the traveling unit 1 through a hinge shaft 202, and the lifting adjusting unit 3, the angle adjusting unit 4 and the maintenance platform 5 are integrally positioned on the adjusting seat 201;
and a first pushing cylinder 203 arranged between the adjusting seat 201 and the rear vehicle plate 102, wherein the adjusting seat 201 is pushed to rotate around the hinge shaft 202 by the stretching of the pushing cylinder, so that the front end of the adjusting seat 201 is lifted.
The pushing structure includes:
the sliding rail is arranged on the upper end surface of the adjusting seat 201 of the lifting structure and is arranged along the advancing direction of the advancing unit 1;
the sliding strip 204 is in sliding fit with the sliding rail, and the sliding strip 204 is arranged on the lower end face of the lifting base 301 of the lifting adjusting unit 3;
and a second pushing cylinder 205 arranged on the adjusting seat 201 along the traveling direction, wherein one end of the second pushing cylinder 205 is fixed on the adjusting seat 201, and the other end is connected with the side wall of the lifting base 301 of the lifting adjusting unit 3. The lifting adjusting unit 3, the angle adjusting unit 4 and the maintenance platform 5 are driven to slide out or in relative to the adjusting seat 201 of the lifting structure by the extension and retraction of the second pushing cylinder 205.
The number of the sliding rails and the sliding strips 204 is two. And the sliding fit is realized in a one-to-one correspondence manner.
The traveling unit 1 of the present invention may be any motor vehicle with a rear deck 102 for gravity bearing; the lifting adjusting unit 3 of the invention adopts the X-rod mechanism 302, so that the structure is more stable.

Claims (9)

1. Electric power is with overhauing device, its characterized in that includes:
a travel unit (1), the travel unit (1) being a motor vehicle;
an inspection platform (5);
the angle adjusting unit (4) is arranged at the lower end of the maintenance platform (5), and the inclination angle of the maintenance platform (5) is adjusted through the angle adjusting unit (4);
the lifting adjusting unit (3) is arranged at the lower end of the angle adjusting unit (4), and the angle adjusting unit (4) and the maintenance platform (5) are driven to integrally ascend or descend by the lifting adjusting unit (3);
and a position adjustment unit (2) provided on a rear panel (102) of a body (101) of the motor vehicle; through the position adjusting unit (2) adjusts the lifting adjusting unit (3), the angle adjusting unit (4) and the maintenance platform (5) to the back depth along the vehicle traveling direction and support with the ground.
2. The electric power service device according to claim 1, wherein the service desk (5) includes:
a table body (501);
and the fences (502) are uniformly distributed on the periphery of the upper surface of the table body (501).
3. The electric power service inspection device according to claim 2, wherein the inspection table (5) further includes a protective cover provided around the table body (501).
4. The electric power service inspection device according to claim 1, wherein the angle adjusting unit (4) includes:
the maintenance platform (5) is positioned on one side edge of the front end of the advancing unit (1) in the advancing direction and is in running fit with the adjusting box (401);
and the third pushing cylinder (402) is arranged inside the adjusting box (401) and arranged along the vertical direction, one end of the third pushing cylinder (402) is connected with the bottom surface inside the adjusting box (401), the other end of the third pushing cylinder is hinged with the lower end surface of the maintenance platform (5), and the hinged position is located at the tail end position of the maintenance platform (5) along the advancing direction of the advancing unit (1).
5. The electric power service inspection device according to claim 1, wherein the elevation adjusting unit (3) includes:
a lifting base (301);
and an X-bar mechanism (302) arranged between the lifting base (301) and the angle adjusting unit (4).
6. The electric power service inspection apparatus according to any one of claims 1 to 5, wherein the position adjusting unit (2) includes:
a lifting structure which drives the lifting adjusting unit (3), the angle adjusting unit (4) and the maintenance platform (5) to lift up or descend along the front end of the advancing direction of the advancing unit (1);
and a pushing structure for pushing the lifting adjusting unit (3), the angle adjusting unit (4) and the maintenance platform (5) to slide out integrally along the rear part of the advancing direction of the advancing unit (1).
7. The electric power service inspection device according to claim 6, wherein the lifting structure includes:
the tail end of the adjusting seat (201) in the traveling direction is rotationally matched with the tail end of a rear plate (102) of a vehicle body (101) of the traveling unit (1) through a hinge shaft (202), and the lifting adjusting unit (3), the angle adjusting unit (4) and the overhaul platform (5) are integrally positioned on the adjusting seat (201);
and a first pushing cylinder (203) arranged between the adjusting seat (201) and the rear vehicle plate (102), and the adjusting seat (201) is pushed to rotate around the hinge shaft (202) through the extension and contraction of the pushing cylinder.
8. The electric power service inspection device according to claim 7, wherein the pushing structure includes:
the sliding rail is arranged on the upper end face of the adjusting seat (201) of the lifting structure and is arranged along the advancing direction of the advancing unit (1);
the sliding strip (204) is in sliding fit with the sliding rail, and the sliding strip (204) is arranged on the lower end face of a lifting base (301) of the lifting adjusting unit (3);
and the second pushing cylinder (205) is arranged on the adjusting seat (201) along the advancing direction, one end of the second pushing cylinder (205) is fixed on the adjusting seat (201), and the other end of the second pushing cylinder is connected with the side wall of the lifting base (301) of the lifting adjusting unit (3).
9. The electric power service inspection device according to claim 8, wherein the number of the slide rails and the slide bars (204) is two.
CN202210538937.9A 2022-05-18 2022-05-18 Electric power overhauling device Active CN114873531B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210538937.9A CN114873531B (en) 2022-05-18 2022-05-18 Electric power overhauling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210538937.9A CN114873531B (en) 2022-05-18 2022-05-18 Electric power overhauling device

Publications (2)

Publication Number Publication Date
CN114873531A true CN114873531A (en) 2022-08-09
CN114873531B CN114873531B (en) 2024-06-21

Family

ID=82675073

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210538937.9A Active CN114873531B (en) 2022-05-18 2022-05-18 Electric power overhauling device

Country Status (1)

Country Link
CN (1) CN114873531B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009269719A (en) * 2008-05-08 2009-11-19 Aichi Corp Vehicle for high lift work
KR20100048536A (en) * 2008-10-31 2010-05-11 한아에쎄스 주식회사 High place working vehicle with a dump function for agriculture
CN105692513A (en) * 2016-04-12 2016-06-22 国网江苏省电力公司扬州供电公司 Shear-fork type insulation overhead work platform car
CN210393625U (en) * 2019-07-11 2020-04-24 李军 Remove portable lift high altitude construction car
CN213796365U (en) * 2020-12-07 2021-07-27 安徽工程大学 Power battery overhaul platform
CN214611401U (en) * 2021-02-24 2021-11-05 巴彦淖尔市力诺太阳能电力有限公司 A full way segmentation lift truck for photovoltaic module maintenance

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009269719A (en) * 2008-05-08 2009-11-19 Aichi Corp Vehicle for high lift work
KR20100048536A (en) * 2008-10-31 2010-05-11 한아에쎄스 주식회사 High place working vehicle with a dump function for agriculture
CN105692513A (en) * 2016-04-12 2016-06-22 国网江苏省电力公司扬州供电公司 Shear-fork type insulation overhead work platform car
CN210393625U (en) * 2019-07-11 2020-04-24 李军 Remove portable lift high altitude construction car
CN213796365U (en) * 2020-12-07 2021-07-27 安徽工程大学 Power battery overhaul platform
CN214611401U (en) * 2021-02-24 2021-11-05 巴彦淖尔市力诺太阳能电力有限公司 A full way segmentation lift truck for photovoltaic module maintenance

Also Published As

Publication number Publication date
CN114873531B (en) 2024-06-21

Similar Documents

Publication Publication Date Title
CN212533819U (en) Power equipment warning device
CN210655986U (en) Liftable and levelled triaxial lead screw
CN110788100B (en) Lifting device of transformer substation porcelain insulator electrified automatic cleaning robot
CN205385235U (en) Distribution switch cabinet in -position mounting platform
CN114873531A (en) Electric power overhaul device
CN220915210U (en) New forms of energy photovoltaic board protective structure
CN211352111U (en) Adjustable solar photovoltaic panel
CN116553424B (en) Lifting platform and method for intelligent aircraft part overhaul
CN207934799U (en) Electric power Multifunctional stairs
CN213037381U (en) Power equipment mounting rack with automatic lifting function
CN106219117B (en) The layer of full-automatic compact shelving repository moves car body
CN205381914U (en) Conveying device
CN218893438U (en) Lifting device for be used for steam turbine maintenance
CN211952127U (en) A display device for cosmetic rehabilitation study
CN211095421U (en) Surgical nursing bed convenient to adjust and promote to use
CN210885009U (en) Equipment hoisting alignment device for wind power generation
CN221917328U (en) Portable electric power overhauls and uses supporting platform with raising and lowering functions
CN221680689U (en) Safety device is used in installation of power supply facility construction
CN215626632U (en) Remove over-and-under type pier device of going on board
CN219428343U (en) Ship maintenance device convenient to lift
CN118254308B (en) Wind-powered electricity generation blade mould tipping arrangement
CN116374913A (en) Portable comprehensive power maintenance detection device
CN221940057U (en) Lifting platform for aircraft maintenance
CN215566400U (en) Quick lifting formula wind-powered electricity generation maintenance platform
CN112366579B (en) Novel anti-falling device for overhaul operation of top of high-voltage switch cabinet

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