CN110092314B - Hydraulic petroleum pipeline hoisting, carrying and installing equipment - Google Patents

Hydraulic petroleum pipeline hoisting, carrying and installing equipment Download PDF

Info

Publication number
CN110092314B
CN110092314B CN201910373371.7A CN201910373371A CN110092314B CN 110092314 B CN110092314 B CN 110092314B CN 201910373371 A CN201910373371 A CN 201910373371A CN 110092314 B CN110092314 B CN 110092314B
Authority
CN
China
Prior art keywords
frame
fixedly connected
petroleum pipeline
lifting
hydraulic
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
CN201910373371.7A
Other languages
Chinese (zh)
Other versions
CN110092314A (en
Inventor
黄鲁蒙
高照
张彦廷
王培旺
沈蓉
王静
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.)
China University of Petroleum East China
Original Assignee
China University of Petroleum East China
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 China University of Petroleum East China filed Critical China University of Petroleum East China
Priority to CN201910373371.7A priority Critical patent/CN110092314B/en
Publication of CN110092314A publication Critical patent/CN110092314A/en
Application granted granted Critical
Publication of CN110092314B publication Critical patent/CN110092314B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/42Gripping members engaging only the external or internal surfaces of the articles
    • B66C1/44Gripping members engaging only the external or internal surfaces of the articles and applying frictional forces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00Portable or mobile lifting or hauling appliances

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

The invention discloses hydraulic petroleum pipeline lifting, carrying and installing equipment, which relates to the technical field of petroleum pipeline installation and comprises a lifting frame, wherein an isolation frame is arranged inside the lifting frame, a fixed rod is fixedly connected between the isolation frame and the lifting frame, the top end of the lifting frame is fixedly connected with a top frame, a second hydraulic telescopic rod is fixedly connected on the top frame, the lifting frame comprises two support legs, one support leg is rotatably connected with a rotating support leg, one side of the rotating support leg, far away from the isolation frame, is slidably connected with a slide block, the slide block is rotatably connected with a first hydraulic telescopic rod, the first hydraulic telescopic rod is fixedly connected with the lifting frame, a placing device is arranged between the other support leg of the lifting frame and the isolation frame, the invention can clamp and lift a petroleum pipeline by arranging the second hydraulic telescopic rod and a clamping mechanism, the lifted petroleum pipeline can be placed by arranging the placing device, and a plurality of petroleum pipelines can be, thereby increasing the hoisting and conveying efficiency of the petroleum pipeline.

Description

Hydraulic petroleum pipeline hoisting, carrying and installing equipment
Technical Field
The invention relates to the technical field of petroleum pipeline installation, in particular to hydraulic petroleum pipeline hoisting, carrying and installing equipment.
Background
Petroleum, also known as crude oil, is a viscous, dark brown (sometimes somewhat green) liquid. The upper part of the crust has oil storage. The properties of petroleum vary with the production area, the viscosity range is wide, the solidifying point difference is large (30-60 ℃), the boiling point range is from normal temperature to more than 500 ℃, the petroleum can be dissolved in various organic solvents, the petroleum can not be dissolved in water, but can form emulsion with water, but the components and appearances of the petroleum of different oil fields can be greatly distinguished.
The oil relies on the petroleum pipeline to carry the oil, the petroleum pipeline is in the installation, often need hoisting accessory to hang the petroleum pipeline to the mounting height and install, traditional hoisting accessory is mostly operated on the petroleum pipeline with the rope cover, the petroleum pipeline is at the in-process of lifting by crane, take place easily and rock, unable accuracy is good with the petroleum pipeline installation, work efficiency has been reduced, or the manual one-section pipeline of lifting by oil construction workman is on the construction site, this again seriously increases workman's intensity of labour, the practicality is poor.
Chinese utility model patent document No. CN207551861U discloses a mechanical carrying and lifting device for petroleum pipeline installation. The device is through mutually supporting between two clamp rings, realizes lifting by crane to the petroleum pipeline of different diameters, has both effectively avoided the petroleum pipeline to rock about lifting by crane the in-process and producing for the petroleum pipeline can be prepared send to the mounted position, also reducing workman's intensity of labour simultaneously, but the device once only can carry a pipeline, and handling efficiency is low.
Disclosure of Invention
The invention aims to provide hydraulic petroleum pipeline hoisting, carrying and installing equipment to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a hydraulic petroleum pipeline lifting, carrying and installing device comprises a lifting frame, wherein an isolation frame is arranged inside the lifting frame, a fixed rod is fixedly connected between the isolation frame and the lifting frame, the top end of the lifting frame is fixedly connected with a top frame, a second hydraulic telescopic rod is fixedly connected to the top frame, the lifting frame comprises two support legs, one support leg is rotatably connected with a rotating support leg, one side, away from the isolation frame, of the rotating support leg is slidably connected with a sliding block, the sliding block is rotatably connected with a first hydraulic telescopic rod, the first hydraulic telescopic rod is fixedly connected with the lifting frame, a placing device is arranged between the other support leg of the lifting frame and the isolation frame, the lifting frame and the isolation frame are respectively provided with a clamping groove corresponding to the placing device, the telescopic end of the second hydraulic telescopic rod is fixedly connected with a lifting rod, the lifting rod penetrates through the lifting frame and is fixedly connected with a connecting seat, a clamping mechanism is fixedly arranged at the bottom, the bottom both sides of sill bar all rotate the connection clamping jaw, are equipped with stop device between the top of clamping jaw and the connecting seat, be equipped with baffle mechanism between the top of isolation frame and the hoist and mount frame.
As a further scheme of the invention: the limiting device comprises an outer sleeve, a bottom end fixed connection pressing spring in the outer sleeve, a top end fixed connection telescopic column of the pressing spring, the outer sleeve is fixedly connected with the clamping jaw, and the bottom end fixed connection of the connecting seat is provided with a limiting cap corresponding to the telescopic column.
As a further scheme of the invention: the baffle mechanism comprises a first rotating plate and a second rotating plate, and the first rotating plate and the second rotating plate are respectively connected with the isolating frame and the hoisting frame in a rotating mode.
As a further scheme of the invention: a first inner cavity corresponding to the first rotating plate is formed in the isolating frame, one end of the first rotating plate is arranged in the first inner cavity and fixedly connected with a first return spring, and one end, far away from the first rotating plate, of the first return spring is fixedly connected with the isolating frame.
As a further scheme of the invention: and a second inner cavity corresponding to the second rotating plate is formed in the hoisting frame, one end of the second rotating plate is arranged in the second inner cavity and is fixedly connected with a second return spring, and one end, far away from the second rotating plate, of the second return spring is fixedly connected with the hoisting frame.
As a further scheme of the invention: the placing device comprises a supporting plate, the top end of the supporting plate is fixedly connected with a placing seat, and a placing groove is formed in the top end of the placing seat.
As a further scheme of the invention: the section of the placing groove is semicircular
Compared with the prior art, the invention has the beneficial effects that: the second hydraulic telescopic rod and the clamping mechanism are arranged to clamp and hoist the petroleum pipeline, the hoisting device is arranged to place the hoisted petroleum pipeline, and a plurality of petroleum pipelines can be placed, so that the hoisting and conveying efficiency of the petroleum pipeline is improved.
Drawings
Fig. 1 is a schematic structural diagram of a hydraulic petroleum pipeline hoisting, carrying and installing device.
Fig. 2 is a schematic structural diagram of a clamping mechanism in a hydraulic petroleum pipeline hoisting, carrying and installing device.
Fig. 3 is a schematic structural diagram of a limiting device in a hydraulic petroleum pipeline hoisting, carrying and installing device.
FIG. 4 is a schematic structural diagram of a baffle mechanism in a hydraulic petroleum pipeline hoisting, carrying and installing device.
FIG. 5 is a schematic structural diagram of a placing device in a hydraulic petroleum pipeline hoisting, carrying and installing device.
In the figure: 1-hoisting frame, 2-isolation frame, 3-fixed rod, 4-rotating support leg, 5-sliding block, 6-first hydraulic telescopic rod, 7-baffle mechanism, 8-top frame, 9-second hydraulic telescopic rod, 10-lifting rod, 11-connecting seat, 12-clamping mechanism, 13-clamping groove, 14-placing device, 15-bottom rod, 16-limiting device, 17-clamping jaw, 18-limiting cap, 19-telescopic column, 20-outer sleeve, 21-pressing spring, 22-first inner cavity, 23-second inner cavity, 24-first rotating plate, 25-second rotating plate, 26-first reset spring, 27-second reset spring, 28-moving wheel, 29-supporting plate, 30-placing seat, 31-placing the trough.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Referring to fig. 1-5, a hydraulic petroleum pipeline lifting, carrying and installing device comprises a lifting frame 1, an isolation frame 2 is arranged inside the lifting frame 1, a fixed rod 3 is fixedly connected between the isolation frame 2 and the lifting frame 1, a top frame 8 is fixedly connected to the top end of the lifting frame 1, a second hydraulic telescopic rod 9 is fixedly connected to the top frame 8, the lifting frame 1 comprises two support legs, one support leg is rotatably connected with a rotating support leg 4, a sliding block 5 is slidably connected to one side of the rotating support leg 4 away from the isolation frame 2, the sliding block 5 is rotatably connected with a first hydraulic telescopic rod 6, the first hydraulic telescopic rod 6 is fixedly connected with the lifting frame 1, a placing device 14 is arranged between the other support leg of the lifting frame 1 and the isolation frame 2, clamping grooves 13 corresponding to the placing device 14 are formed in the lifting frame 1 and the isolation frame 2, and a lifting rod 10 is fixedly connected to the telescopic end of the second hydraulic telescopic rod 9, the lifting rod 10 penetrates through the hoisting frame 1 and is fixedly connected with the connecting seat 11, the bottom fixing of the connecting seat 11 is provided with a clamping mechanism 12, the clamping mechanism 12 comprises a bottom rod 15 fixedly connected with the bottom end of the connecting seat 11, two sides of the bottom end of the bottom rod 15 are respectively rotatably connected with a clamping jaw 17, a limiting device 16 is arranged between the top end of the clamping jaw 17 and the connecting seat 11, and a baffle mechanism 7 is arranged between the top end of the isolation frame 2 and the hoisting frame 1.
The limiting device 16 comprises an outer sleeve 20, a bottom end in the outer sleeve 20 is fixedly connected with a compression spring 21, the top end of the compression spring 21 is fixedly connected with a telescopic column 19, the outer sleeve 20 is fixedly connected with a clamping jaw 17, and a limiting cap 18 corresponding to the telescopic column 19 is fixedly connected with the bottom end of the connecting seat 11.
The baffle mechanism 7 comprises a first rotating plate 24 and a second rotating plate 25, and the first rotating plate 24 and the second rotating plate 25 are respectively connected with the isolation frame 2 and the hoisting frame 1 in a rotating mode.
A first inner cavity 22 corresponding to the first rotating plate 24 is formed in the isolation frame 2, one end of the first rotating plate 24 is placed in the first inner cavity 22 and fixedly connected with a first return spring 26, and one end, far away from the first rotating plate 24, of the first return spring 26 is fixedly connected with the isolation frame 2.
A second inner cavity 23 corresponding to the second rotating plate 25 is formed in the hoisting frame 1, one end of the second rotating plate 25 is arranged in the second inner cavity 23 and is fixedly connected with a second return spring 27, and one end, far away from the second rotating plate 25, of the second return spring 27 is fixedly connected with the hoisting frame 1.
The placing device 14 comprises a supporting plate 29, a placing seat 30 is fixedly connected to the top end of the supporting plate 29, and a placing groove 31 is formed in the top end of the placing seat 30.
Example 2
Referring to fig. 1 to 5, the other contents of the present embodiment are the same as embodiment 1, except that: the cross-section of the placing groove 31 is semicircular, and the bottom ends of the hoisting frame 1 and the isolation frame 2 are provided with moving wheels 28.
In the implementation process of the invention, the first hydraulic telescopic rod 6 is started to rotate the rotating support leg 4, so that the petroleum pipeline is arranged at one side of the isolation frame 2, then the second hydraulic telescopic rod 9 is started to extend to enable the clamping mechanism 12 to descend, then the two clamping jaws 17 are placed on two sides of the petroleum pipeline, the telescopic column 19 is inserted into the limiting cap 18 to achieve fixing of the clamping jaws 17, the second hydraulic telescopic rod 9 is started to contract to lift the petroleum pipeline, the petroleum pipeline pushes the first rotating plate 24 and the second rotating plate 25 to rotate in the ascending process until the petroleum pipeline is located at the top end of the lifting frame 1, at the moment, the first rotating plate 24 and the second rotating plate 25 reset, the telescopic column 19 is pressed downwards to enable the telescopic column to be separated from the limiting cap 18, and the petroleum pipeline falls onto the first rotating plate 24 and the second rotating plate 25 and slides into the placing groove 31 in the placing base 30 to achieve placing of the petroleum pipeline.
According to the invention, the petroleum pipeline can be clamped and hoisted by arranging the second hydraulic telescopic rod 9 and the clamping mechanism 12, the hoisted petroleum pipeline can be placed by arranging the placing device 14, and a plurality of petroleum pipelines can be placed, so that the hoisting and conveying efficiency of the petroleum pipeline is increased.

Claims (8)

1. A hydraulic petroleum pipeline lifting, carrying and installing device comprises a lifting frame (1), an isolation frame (2) is arranged inside the lifting frame (1), a fixed rod (3) is fixedly connected between the isolation frame (2) and the lifting frame (1), a top frame (8) is fixedly connected to the top end of the lifting frame (1), and a second hydraulic telescopic rod (9) is fixedly connected to the top frame (8), the hydraulic petroleum pipeline lifting device is characterized in that the lifting frame (1) comprises two support legs, one support leg is rotatably connected with a rotating support leg (4), a sliding block (5) is slidably connected to one side, far away from the isolation frame (2), of the rotating support leg (4), the sliding block (5) is rotatably connected with a first hydraulic telescopic rod (6), the first hydraulic telescopic rod (6) is fixedly connected with the lifting frame (1), a placing device (14) is arranged between the other support leg of the lifting frame (1) and the isolation frame (2), and clamping grooves (13) corresponding to the placing device (14) are formed in the lifting frame (1) and the isolation, the telescopic end of second hydraulic stretching pole (9) is fixed connection lifter (10), lifter (10) pass hoist and mount frame (1) and fixed connection connecting seat (11), and the bottom mounting of connecting seat (11) is equipped with fixture (12), and fixture (12) are including bottom bar (15) of fixed connection in connecting seat (11) bottom, and the bottom both sides of bottom bar (15) are all rotated and are connected clamping jaw (17), are equipped with stop device (16) between the top of clamping jaw (17) and connecting seat (11), be equipped with baffle mechanism (7) between the top of isolation frame (2) and hoist and mount frame (1).
2. The hydraulic petroleum pipeline hoisting, carrying and installing equipment as recited in claim 1, wherein the limiting device (16) comprises an outer sleeve (20), a bottom end inside the outer sleeve (20) is fixedly connected with a compression spring (21), a top end of the compression spring (21) is fixedly connected with a telescopic column (19), the outer sleeve (20) is fixedly connected with the clamping jaw (17), and a bottom end of the connecting seat (11) is fixedly connected with a limiting cap (18) corresponding to the telescopic column (19).
3. The hydraulic petroleum pipeline hoisting, carrying and installing equipment as recited in claim 1, wherein the baffle mechanism (7) comprises a first rotating plate (24) and a second rotating plate (25), and the first rotating plate (24) and the second rotating plate (25) are respectively connected with the isolation frame (2) and the hoisting frame (1) in a rotating way.
4. The hydraulic petroleum pipeline hoisting, carrying and installing equipment according to claim 3, wherein the isolation frame (2) is internally provided with a first inner cavity (22) corresponding to the first rotating plate (24), one end of the first rotating plate (24) is arranged in the first inner cavity (22) and is fixedly connected with a first return spring (26), and one end of the first return spring (26) far away from the first rotating plate (24) is fixedly connected with the isolation frame (2).
5. The hydraulic petroleum pipeline hoisting, carrying and installing equipment as recited in claim 4, wherein the hoisting frame (1) is internally provided with a second inner cavity (23) corresponding to the second rotating plate (25), one end of the second rotating plate (25) is arranged in the second inner cavity (23) and is fixedly connected with a second return spring (27), and one end of the second return spring (27) far away from the second rotating plate (25) is fixedly connected with the hoisting frame (1).
6. The hydraulic petroleum pipeline hoisting, carrying and installing equipment as recited in claim 1, wherein the placing device (14) comprises a support plate (29), the top end of the support plate (29) is fixedly connected with a placing seat (30), and the top end of the placing seat (30) is provided with a placing groove (31).
7. The hydraulic petroleum pipeline lifting, carrying and installing equipment as recited in claim 6, wherein the cross section of the placing groove (31) is semicircular.
8. A hydraulic petroleum pipeline lifting, carrying and installing equipment as claimed in claim 5 or 7, wherein the bottom ends of the lifting frame (1) and the isolation frame (2) are provided with moving wheels (28).
CN201910373371.7A 2019-05-07 2019-05-07 Hydraulic petroleum pipeline hoisting, carrying and installing equipment Active CN110092314B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910373371.7A CN110092314B (en) 2019-05-07 2019-05-07 Hydraulic petroleum pipeline hoisting, carrying and installing equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910373371.7A CN110092314B (en) 2019-05-07 2019-05-07 Hydraulic petroleum pipeline hoisting, carrying and installing equipment

Publications (2)

Publication Number Publication Date
CN110092314A CN110092314A (en) 2019-08-06
CN110092314B true CN110092314B (en) 2020-11-10

Family

ID=67447100

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910373371.7A Active CN110092314B (en) 2019-05-07 2019-05-07 Hydraulic petroleum pipeline hoisting, carrying and installing equipment

Country Status (1)

Country Link
CN (1) CN110092314B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112174008A (en) * 2020-09-27 2021-01-05 湖南楚怀建材有限公司 Hoisting machine for manufacturing large-caliber reinforced concrete drain pipe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202518968U (en) * 2012-02-24 2012-11-07 佛山市海天(高明)调味食品有限公司 Hose moving device
KR20140006180U (en) * 2013-05-30 2014-12-10 현대중공업 주식회사 Apparatus for supporting a joint pipe
CN204805729U (en) * 2015-07-14 2015-11-25 姜勇 Petrochemical transports pipeline bracket
CN107830251A (en) * 2017-12-07 2018-03-23 王红军 A kind of petroleum pipeline erecting device of convenient use
CN108100911A (en) * 2017-12-14 2018-06-01 李奇宏 A kind of petroleum pipeline suitable for different-diameter is laid with installation boom hoisting

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160069477A1 (en) * 2014-09-08 2016-03-10 Kenneth Tabor Pipe Installation Device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202518968U (en) * 2012-02-24 2012-11-07 佛山市海天(高明)调味食品有限公司 Hose moving device
KR20140006180U (en) * 2013-05-30 2014-12-10 현대중공업 주식회사 Apparatus for supporting a joint pipe
CN204805729U (en) * 2015-07-14 2015-11-25 姜勇 Petrochemical transports pipeline bracket
CN107830251A (en) * 2017-12-07 2018-03-23 王红军 A kind of petroleum pipeline erecting device of convenient use
CN108100911A (en) * 2017-12-14 2018-06-01 李奇宏 A kind of petroleum pipeline suitable for different-diameter is laid with installation boom hoisting

Also Published As

Publication number Publication date
CN110092314A (en) 2019-08-06

Similar Documents

Publication Publication Date Title
CN202098976U (en) Device capable of freely adjusting sling length and overhead transverse posture of part
CN102386588B (en) Lifting device for live installation of equipment on power supply line column
CN206901722U (en) One kind steps up fixed hydraulic jack
CN110092314B (en) Hydraulic petroleum pipeline hoisting, carrying and installing equipment
CN212503731U (en) Boiler installation overhead hoist
CN202340093U (en) Equipment live mounting hoist device on power supply circuit post
CN216957646U (en) Pole-mounted transformer mounting device
CN203238967U (en) Large steel structure frame whole lifting device
CN103950872A (en) Upright tube hoisting multifunctional tool of substation altitude plant
CN205766057U (en) A kind of circular magnesium alloy die casting hitch
CN212839809U (en) Prefabricated pipeline lifting device
CN211813094U (en) Mechanical carrying and hoisting device for petroleum pipeline installation
CN210127053U (en) Concrete lifting device for building construction
CN203833575U (en) Vertical rod hoisting multifunctional tool of substation high-altitude device
CN209533205U (en) A kind of assembly device of jack
CN209193414U (en) Integrated pump station hanging device
CN102199996B (en) Stand connection method and device thereof
CN213138853U (en) Aerated concrete block handling device
CN202440281U (en) Mounting bracket of movable elevator
CN210396203U (en) Safety support for high-altitude operation
CN218909693U (en) Spliced balancing weight of tower crane
CN217498484U (en) Small-size diversified portable portal frame
CN212639663U (en) Power transmission engineering hoisting device with good protection performance
CN217201670U (en) Hoisting device for high-altitude equipment in place
CN216893413U (en) Industry platform for concrete cylinder construction

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