CN106974559A - Panel box wiring fixing structure and oven - Google Patents

Panel box wiring fixing structure and oven Download PDF

Info

Publication number
CN106974559A
CN106974559A CN201710339003.1A CN201710339003A CN106974559A CN 106974559 A CN106974559 A CN 106974559A CN 201710339003 A CN201710339003 A CN 201710339003A CN 106974559 A CN106974559 A CN 106974559A
Authority
CN
China
Prior art keywords
cabling channel
panel box
fixed structure
trunking
rotating shaft
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
CN201710339003.1A
Other languages
Chinese (zh)
Other versions
CN106974559B (en
Inventor
尤艳
陈兴强
丁泺火
梁少棠
冷芬勇
肖冰海
冯圆通
张成玉
周荣
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.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
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 Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN201710339003.1A priority Critical patent/CN106974559B/en
Publication of CN106974559A publication Critical patent/CN106974559A/en
Application granted granted Critical
Publication of CN106974559B publication Critical patent/CN106974559B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J37/00Baking; Roasting; Grilling; Frying
    • A47J37/06Roasters; Grills; Sandwich grills
    • A47J37/0623Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity
    • A47J37/0664Accessories
    • 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)
  • Food Science & Technology (AREA)
  • Cookers (AREA)
  • Casings For Electric Apparatus (AREA)

Abstract

The invention relates to the technical field of ovens, in particular to a panel box wiring fixing structure and an oven, wherein the panel box wiring fixing structure comprises a first wiring groove and a second wiring groove which are communicated with each other; one end of the first wiring groove is connected with the panel box, the other end of the first wiring groove is rotatably connected with the second wiring groove, and a rotating assembly is arranged at one end, far away from the first wiring groove, of the second wiring groove. According to the panel box wiring fixing structure provided by the invention, the first wiring groove and the second wiring groove drive the circuit to move regularly, and disordered movement of the circuit is avoided, so that the conditions of wire pulling, wire clamping and the like are avoided, the circuit is effectively protected, and the service life is longer.

Description

A kind of panel box fixed structure of routing and baking box
Technical field
The present invention relates to oven technology field, more particularly to a kind of panel box fixed structure of routing and baking box.
Background technology
Baking box is a kind of common household electrical appliance, as the continuous progress of oven designs, and the continuous of people's requirement are carried Height, at present, oven product develop to multi-functional direction, and some baking boxs not only have roasting function, while also having steaming, microwave Etc. function.
Baking box with steam function, needs to set water tank, generally, water tank is arranged on the top of baking box on baking box Portion, and being capable of draw operation.When needing moisturizing, water tank is extracted out, original position is back into after the completion of moisturizing again.And before baking box End face is provided with display panel, to coordinate the pull of water tank, and display panel needs that operation may be reversed, that is, extracted out before water tank, first will Display panel is flipped up, and display panel extends forward a segment distance, and is horizontal by plumbness upset, exposes pull The passage of water tank, completes water tank moisturizing, and after after water tank reset, display panel resets again.
Display panel is by devices such as line connecting controllers, using aforesaid way, and display panel needs frequently to overturn Operation, can now drive circuit together to move;According to conventional connection mode, in the motion process of display panel, circuit The motion of rule is unable to, the phenomenons such as bracing wire, clamp easily occurs, the life-span of circuit is influenceed, so that baking box can not be used normally.
The content of the invention
It is an object of the invention to propose a kind of panel box fixed structure of routing and baking box, to solve to exist in the prior art Display panel when rotating, the irregular motion of circuit, easy bracing wire, clamp, influence circuit life-span and the technology that uses of baking box are asked Topic.
For up to this purpose, the present invention uses following technical scheme:
A kind of panel box fixed structure of routing, including the first cabling channel and the second cabling channel, first cabling channel and institute The second cabling channel is stated to be mutually communicated;
One end of first cabling channel is connected with panel box, and the other end is rotated with second cabling channel and is connected, described The one end of second cabling channel away from first cabling channel is provided with runner assembly.
Further, the side wall of first cabling channel and/or second cabling channel is provided with for block circuit Projection.
Further, the projection is the baffle plate extended internally by sidewall horizontal.
Further, first cabling channel includes the first trunking and the second trunking interpenetrated, described first Trunking is rotated with second cabling channel and is connected, the one end of first trunking away from the second cabling channel and second line Groove portion bending connection, first cabling channel connects the panel box by second trunking.
Further, second trunking is provided with the card adapter plate for being used for connecting the panel box.
Further, connected between first cabling channel and second cabling channel by first rotating shaft.
Further, first cabling channel is provided with beam barrel, and second cabling channel is provided with otic placode, the otic placode position In the two ends of the beam barrel, the first rotating shaft passes through the beam barrel and the otic placode.
Further, the runner assembly includes being equipped with the second rotating shaft on beam barrel, the beam barrel.
Further, it is connected with back-up ring in the first rotating shaft and second rotating shaft.
The present invention also provides a kind of baking box, including above-mentioned panel box fixed structure of routing.
A kind of panel box fixed structure of routing that the present invention is provided, in use, circuit is arranged on into the first cabling channel and In two cabling channels, panel box is driven by drive device and overturn, and final rotated by plumbness of panel box is horizontality, and first walks Wire casing and the second cabling channel also complete corresponding rotational action under the drive of panel box and/or drive device, specifically, first The junction of cabling channel and the second cabling channel is rotated, and the lower rotation of the second cabling channel, the first cabling channel and the second cabling channel exist The motion of rule is realized in panel box rotation process, so as to drive the circuit rule connected thereon to move.
The panel box fixed structure of routing, the motion of circuit rule is driven by the first cabling channel and the second cabling channel, it is to avoid The unordered motion of circuit, so as to avoid the occurrence of the situations such as bracing wire, clamp, plays to circuit and is effectively protected, service life is longer.
The present invention also provides a kind of baking box, by using above-mentioned panel box fixed structure of routing, it is possible to decrease circuit breakage Probability, improves circuit use time, it is ensured that baking box is normally used.
Brief description of the drawings
Fig. 1 is the structural representation for the panel box fixed structure of routing that the present invention is provided;
Fig. 2 is the structural representation of the first cabling channel of the panel box fixed structure of routing that the present invention is provided;
Fig. 3 is the structural representation of the second cabling channel of the panel box fixed structure of routing that the present invention is provided;
Fig. 4 is the structural representation of the rotating shaft for the panel box fixed structure of routing that the present invention is provided;
Fig. 5 is that the structure at the panel box fixed structure of routing of the display panel plumbness for the baking box that the present invention is provided is shown It is intended to;
Fig. 6 is that the structure at the panel box fixed structure of routing of the display panel horizontality for the baking box that the present invention is provided is shown Meaning.
In figure:
1st, the first cabling channel;2nd, the second cabling channel;3rd, panel box;4th, projection;5th, the second rotating shaft;6th, card adapter plate;7th, first Rotating shaft;8th, beam barrel;9th, otic placode;10th, back-up ring;11st, drive device;12nd, the first trunking;13rd, the second trunking.
Embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by embodiment.
As Figure 1-4, a kind of panel box fixed structure of routing, including the first cabling channel 1 and the second cabling channel 2, first The cabling channel 2 of cabling channel 1 and second is mutually communicated;
One end of first cabling channel 1 is connected with panel box 3, and the other end is rotated with the second cabling channel 2 and is connected, the second cabling channel 2 one end away from the first cabling channel 1 are provided with runner assembly.
Runner assembly on second cabling channel 2 is arranged in the other positions of drive device 11 or baking box, runner assembly Position is fixed, rotatably, exemplified by setting on the drive means, and drive device 11 (hinge arrangement such as double leval jib) drives panel box 3 movements, the position of the second cabling channel 2 on the drive means is motionless, only realizes and rotates.Wherein, the first cabling channel 1 and the second cabling Junction between groove 2 connects to rotate, and because panel box 3 is when rotating, first forward extends out a segment distance, then by vertically switching to Level, during this, the junction of the first cabling channel 1 and the second cabling channel 2 is not only rotated, and can also produce the position of certain stroke Move, therefore, drive device 11 can be connected with the junction of the first cabling channel 1 and the second cabling channel 2, while driving the part to transport It is dynamic.
The side wall of first cabling channel 1 and/or the second cabling channel 2 is provided with the projection 4 for block circuit.It is preferred that, Projection 4 is the baffle plate extended internally by sidewall horizontal.The level of projection 4, which extends internally, reduces the first cabling channel 1 and the second cabling channel 2 Notch width, but do not influence the normal placement of circuit.Projection 4 can be in the first cabling channel 1 and the notch of the second cabling channel 2 Place is oppositely arranged, and unilateral can also be set.Wherein, it is preferred that the material of the first cabling channel 1 and the second cabling channel 2 be plastic parts, if Putting projection 4 makes in the case that the width of rebate of the first cabling channel 1 and the second cabling channel 2 diminishes, and its own can produce deformation, not shadow Ring and facilitate the placement of wire rod.
Projection 4 causes in the first cabling channel 1 and the motion process of the second cabling channel 2, circuit can be avoided to come off, it is ensured that circuit It is synchronized with the movement with the first cabling channel 1 and the second cabling channel 2, it is to avoid bracing wire, clamp.
First cabling channel 1 includes the first trunking 12 and the second trunking 13 that interpenetrate, the first trunking 12 and the Two cabling channels 2 rotate connection, and the one end of the first trunking 12 away from the second cabling channel 2 is connected with the bending of the second trunking 13, the One cabling channel 1 connects panel box 3 by the second trunking 13.
It is mutually perpendicular between first trunking 12 and panel box 3, by setting the second trunking 13, it is preferred that the second line In 90 ° of settings between the trunking 12 of groove portion 13 and first, L-shaped structure is mutually put down between the second trunking 13 and panel box 3 OK, it is preferred that the second trunking 13 is provided with the card adapter plate 6 for being used for connecting panel box 3.By card adapter plate 6 by the second trunking 13 are connected with panel box 3, e.g., and card adapter plate 6 is provided with bayonet socket, set neck on panel box 3 accordingly, and bayonet socket coordinates with neck Connection, realizes the assembling between the first trunking 12 and panel box 3.
Connected between first cabling channel 1 and the second cabling channel 2 by first rotating shaft 7.First trunking of the first cabling channel 1 12 are provided with beam barrel 8, and the second cabling channel 2 is provided with otic placode 9, and otic placode 9 is located at the two ends of beam barrel 8, and first rotating shaft 7 passes through beam barrel 8 With otic placode 9.
Realized between first cabling channel 1 and the second cabling channel 2 by first rotating shaft 7 and rotate connection, wherein, second can be walked The width of wire casing 2 is set to the width of the first trunking 12 slightly larger than the first cabling channel 1, and two otic placodes 9 are in the outer of beam barrel 8 Side;Likewise, runner assembly includes beam barrel 8, beam barrel 8 is connected with the second rotating shaft 5.
Back-up ring 10 is connected with the rotating shaft 5 of first rotating shaft 7 and second.When first rotating shaft 7 and the second rotating shaft 5 are installed, rotating cylinder Outside sets back-up ring 10, and back-up ring 10 plays a part of block, it is to avoid come off.
As shown in Figure 5 and Figure 6, the present invention also provides a kind of baking box, including above-mentioned panel box fixed structure of routing.
When specifically used, circuit is placed in the first cabling channel 1 and the wire casing of the second cabling channel 2, the drive that panel box 3 is connected Dynamic device 11 is quadric chain, and during use, the second rotating shaft 5 of the bottom of the second cabling channel 2, which is only rotated, does not produce displacement;And The first rotating shaft 7 of first cabling channel 1 and the junction of the second cabling channel 2 can be rotated, and can produce corresponding displacement, wherein it is preferred that , the rotating shaft on quadric chain shares same rotating shaft with first rotating shaft 7, and the rotating shaft of quadric chain produces displacement, can band The dynamic joint displacement of first rotating shaft 7, so as to realize being synchronized with the movement for fixed structure of routing and panel box, farthest avoids drawing The generation of line, clamp.
As shown in figure 5, initial state panel box 3 is in vertical state, with the first cabling channel 1 and the second cabling channel 2 is coplanar is Example, now, the first cabling channel 1 is horizontal perpendicular to panel box 3, and the second cabling channel 5 is connected with panel box 3.
With the motion of the drive device 11 (quadric chain) of panel box, drive device 11 first promotes panel box 3 forward A mobile segment distance, afterwards, then it is horizontal that panel box 3 is rotated by vertical configuration, as shown in fig. 6, now, the first cabling channel 1 It is plumbness to be rotated by horizontality, and its corresponding panel box 3 connected switchs to horizontal.During this, the second cabling channel 2 Second rotating shaft 5 of bottom rotates down 7 turns of the first rotating shaft of certain angle, the first cabling channel 1 and the junction of the second cabling channel 2 It is dynamic, and the displacement of certain distance is produced downwards.
During this, circuit is with the movement of panel box fixed structure of routing rule, and panel box fixed structure of routing is not only Circuit can be driven together to move, and have certain protective effect to circuit, be not in the situations such as clamp, bracing wire, it is ensured that Circuit is without damage, and service life is longer, and panel box 3 and baking box can be used normally.
The technical principle of the present invention is described above in association with specific embodiment.These descriptions are intended merely to explain the present invention's Principle, and limiting the scope of the invention can not be construed in any way.Based on explanation herein, the technology of this area Personnel, which would not require any inventive effort, can associate other embodiments of the present invention, and these modes are fallen within Within protection scope of the present invention.

Claims (10)

1. a kind of panel box fixed structure of routing, it is characterised in that described including the first cabling channel (1) and the second cabling channel (2) First cabling channel (1) and second cabling channel (2) are mutually communicated;
One end of first cabling channel (1) is connected with panel box (3), and the other end is rotated with second cabling channel (2) and is connected, The one end of second cabling channel (2) away from first cabling channel (1) is provided with runner assembly.
2. panel box fixed structure of routing according to claim 1, it is characterised in that first cabling channel (1) and/or The side wall of second cabling channel (2) is provided with the projection (4) for block circuit.
3. panel box fixed structure of routing according to claim 2, it is characterised in that the projection (4) is by side wall water The flat baffle plate extended internally.
4. panel box fixed structure of routing according to claim 1, it is characterised in that first cabling channel (1) includes The first trunking (12) and the second trunking (13) interpenetrated, first trunking (12) and second cabling channel (2) connection is rotated, the one end of first trunking (12) away from the second cabling channel (2) is bent with second trunking (13) Connection, first cabling channel (1) connects the panel box (3) by second trunking (13).
5. panel box fixed structure of routing according to claim 4, it is characterised in that set on second trunking (13) There is the card adapter plate (6) for connecting the panel box (3).
6. panel box fixed structure of routing according to claim 1, it is characterised in that first cabling channel (1) and institute State between the second cabling channel (2) and to be connected by first rotating shaft (7).
7. panel box fixed structure of routing according to claim 6, it is characterised in that set on first cabling channel (1) There is beam barrel (8), second cabling channel (2) is provided with otic placode (9), and the otic placode (9) is located at the two ends of the beam barrel (8), institute First rotating shaft (7) is stated through the beam barrel (8) and the otic placode (9).
8. panel box fixed structure of routing according to claim 7, it is characterised in that the runner assembly includes beam barrel (8), it is equipped with the second rotating shaft (5) on the beam barrel (8).
9. panel box fixed structure of routing according to claim 8, it is characterised in that the first rotating shaft (7) and second Back-up ring (10) is all connected with rotating shaft (5).
10. a kind of baking box, it is characterised in that including the panel box fixed structure of routing described in claim any one of 1-9.
CN201710339003.1A 2017-05-15 2017-05-15 Panel box wiring fixed knot constructs and oven Active CN106974559B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710339003.1A CN106974559B (en) 2017-05-15 2017-05-15 Panel box wiring fixed knot constructs and oven

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710339003.1A CN106974559B (en) 2017-05-15 2017-05-15 Panel box wiring fixed knot constructs and oven

Publications (2)

Publication Number Publication Date
CN106974559A true CN106974559A (en) 2017-07-25
CN106974559B CN106974559B (en) 2023-07-18

Family

ID=59342442

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710339003.1A Active CN106974559B (en) 2017-05-15 2017-05-15 Panel box wiring fixed knot constructs and oven

Country Status (1)

Country Link
CN (1) CN106974559B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109805780A (en) * 2019-03-13 2019-05-28 青岛海尔智慧厨房电器有限公司 Domestic oven
CN109846377A (en) * 2019-03-13 2019-06-07 青岛海尔智慧厨房电器有限公司 Control panel motion
CN111053451A (en) * 2019-12-30 2020-04-24 珠海格力电器股份有限公司 Push rod device and household appliance

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0632180A1 (en) * 1993-07-02 1995-01-04 NUOVA STAR S.r.l. A hinge for constraining a door to a support structure of the door
CN2814487Y (en) * 2005-04-05 2006-09-06 深圳市勤安科技有限公司 Keyboard-display-mouse integrated device for controlling machine group
JP2008290542A (en) * 2007-05-23 2008-12-04 Inoac Corp Opening/closing structure of console lid
CN201896856U (en) * 2010-11-09 2011-07-13 杭州安费诺飞凤通信部品有限公司 Slide type notebook computer and hinge mechanism therein
CN201947107U (en) * 2011-04-08 2011-08-24 湖州越球电机有限公司 Motor terminal box convenient for arrangement of wires
CN204718263U (en) * 2015-05-28 2015-10-21 宁波奥克斯空调有限公司 A kind of air-conditioner cabling insulation foam plate
CN204965292U (en) * 2015-09-01 2016-01-13 中兴通讯股份有限公司 Flexible trough and hard disk array subrack
CN205053739U (en) * 2015-08-10 2016-03-02 东莞市天倬电器有限公司 Slide rail mechanism and use type of scorching electrical apparatus of this slide rail mechanism
CN105442278A (en) * 2015-12-23 2016-03-30 惠而浦(中国)股份有限公司 Single-rotary-shaft wiring hinge assembly and washing machine door cover with same
CN206080120U (en) * 2016-06-12 2017-04-12 娄莹 Electric steaming furnace
CN207575042U (en) * 2017-05-15 2018-07-06 珠海格力电器股份有限公司 Panel box wiring fixing structure and oven

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0632180A1 (en) * 1993-07-02 1995-01-04 NUOVA STAR S.r.l. A hinge for constraining a door to a support structure of the door
CN2814487Y (en) * 2005-04-05 2006-09-06 深圳市勤安科技有限公司 Keyboard-display-mouse integrated device for controlling machine group
JP2008290542A (en) * 2007-05-23 2008-12-04 Inoac Corp Opening/closing structure of console lid
CN201896856U (en) * 2010-11-09 2011-07-13 杭州安费诺飞凤通信部品有限公司 Slide type notebook computer and hinge mechanism therein
CN201947107U (en) * 2011-04-08 2011-08-24 湖州越球电机有限公司 Motor terminal box convenient for arrangement of wires
CN204718263U (en) * 2015-05-28 2015-10-21 宁波奥克斯空调有限公司 A kind of air-conditioner cabling insulation foam plate
CN205053739U (en) * 2015-08-10 2016-03-02 东莞市天倬电器有限公司 Slide rail mechanism and use type of scorching electrical apparatus of this slide rail mechanism
CN204965292U (en) * 2015-09-01 2016-01-13 中兴通讯股份有限公司 Flexible trough and hard disk array subrack
CN105442278A (en) * 2015-12-23 2016-03-30 惠而浦(中国)股份有限公司 Single-rotary-shaft wiring hinge assembly and washing machine door cover with same
CN206080120U (en) * 2016-06-12 2017-04-12 娄莹 Electric steaming furnace
CN207575042U (en) * 2017-05-15 2018-07-06 珠海格力电器股份有限公司 Panel box wiring fixing structure and oven

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109805780A (en) * 2019-03-13 2019-05-28 青岛海尔智慧厨房电器有限公司 Domestic oven
CN109846377A (en) * 2019-03-13 2019-06-07 青岛海尔智慧厨房电器有限公司 Control panel motion
CN111053451A (en) * 2019-12-30 2020-04-24 珠海格力电器股份有限公司 Push rod device and household appliance

Also Published As

Publication number Publication date
CN106974559B (en) 2023-07-18

Similar Documents

Publication Publication Date Title
CN106974559A (en) Panel box wiring fixing structure and oven
MX2016000117A (en) Display structure of mobile terminal and mobile terminal.
CN206993267U (en) A kind of rotary type supervising device based on computer control
CN207575042U (en) Panel box wiring fixing structure and oven
CN105187576B (en) Mobile device
CN104503047B (en) Optical cable fiber-dividing box
CN105107661A (en) Aluminum alloy profile spraying device provided with charge coupled device (CCD) spraying gun
CN209762578U (en) Liquid crystal display lifting all-in-one machine
CN103813143A (en) Digital visual intercom system
CN208100695U (en) A kind of novel multiinjector glaze spraying robot
CN206833833U (en) A kind of two point is away from display screen
CN205128273U (en) Aluminium alloy ex -trusions spraying device with CCD spray gun
CN213513095U (en) Classroom management system based on Internet of things
CN211232106U (en) Domestic portable intelligent surveillance camera head
CN207909189U (en) A kind of shared cabinet adapted for storing books of secret protection
CN203747920U (en) Digital video talkback system
CN207582350U (en) A kind of municipal works Equipment Foundations module
CN210526652U (en) Robot chassis and robot
CN104030175A (en) Connection apparatus for rear-oblique pull rod of miniature tower-type hoisting machinery
CN218935938U (en) Mosaic type integrated panel display screen
CN206950129U (en) A kind of high-altitude glass-cleaning device
CN206023990U (en) A kind of accessible video wireless transmission device of full angle rotation
CN210574423U (en) Portable multi-functional teaching rack
CN205034978U (en) A movie & TV device of 360 operation visual angles in crane is provided
CN205301781U (en) Video camera cloud platform

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