CN217929160U - Detachable fan blade assembly and purifier - Google Patents
Detachable fan blade assembly and purifier Download PDFInfo
- Publication number
- CN217929160U CN217929160U CN202222126335.0U CN202222126335U CN217929160U CN 217929160 U CN217929160 U CN 217929160U CN 202222126335 U CN202222126335 U CN 202222126335U CN 217929160 U CN217929160 U CN 217929160U
- Authority
- CN
- China
- Prior art keywords
- fan blade
- detachable
- purifier
- butt joint
- rod
- 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
Links
- 210000001503 joint Anatomy 0.000 claims abstract description 39
- 238000003032 molecular docking Methods 0.000 claims abstract description 13
- 241000883990 Flabellum Species 0.000 abstract description 24
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 239000013566 allergen Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a detachable fan blade component and a purifier, wherein the detachable fan blade component comprises a fan blade and a motor which are coaxially connected, the detachable fan blade component is arranged in a shell, and the detachable fan blade component also comprises a detachable connecting structure connected with the shell; the detachable connection structure comprises a plurality of extension bars extending in a horizontal direction and corresponding docking bars, wherein: the extension bar is connected to the outer surface of the detachable fan blade assembly, the butt joint bar is connected to the inner wall of the shell, and the extension bar is detachably connected with the butt joint bar. The utility model discloses can realize that air-out grid, wind channel inner wall and flabellum subassembly clean the clearance conveniently.
Description
Technical Field
The utility model relates to a can dismantle flabellum subassembly and clarifier.
Background
The air purifier (hereinafter referred to as "purifier") can adsorb, decompose or convert various air pollutants (generally including PM2.5, dust, pollen, peculiar smell, decoration pollution such as formaldehyde, bacteria, allergen and the like), and effectively improve the air cleanliness. Air purifier is inside to have wind channel and flabellum subassembly, and the flabellum subassembly is connected by motor and flabellum and is constituteed, and the ash that falls in the wind channel leads to wind channel and flabellum to be dirty, and the flabellum of current clarifier and flabellum below wind channel are difficult for clearing up.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a can dismantle clarifier of flabellum helps solving the technical problem of the difficult clearance in flabellum and the flabellum below wind channel among the current air purifier.
The utility model adopts the following technical scheme: a detachable fan blade assembly comprises a fan blade and a motor which are coaxially connected, the detachable fan blade assembly is arranged in a shell, and the detachable fan blade assembly further comprises a detachable connecting structure connected with the shell; the detachable connection structure comprises a plurality of extension bars extending in a horizontal direction and corresponding docking bars, wherein: the extension connection is arranged on the outer surface of the detachable fan blade assembly, the butt joint rod is connected to the inner wall of the shell, and the extension rod and the butt joint rod are detachably connected.
Optionally, a plurality of the extension bars are uniformly distributed along the circumference of the detachable fan blade assembly and each extension bar extends along the radial direction of the detachable fan blade assembly; a plurality of the docking levers are uniformly distributed along a circumferential direction of the housing and extend in a radial direction of the housing.
Optionally, the ends of the projecting bar and the docking bar each have stepped surfaces, where the projecting bar and the docking bar abut each other and are screwed together.
A purifier with detachable fan blades comprises a shell, wherein the purifier is provided with the detachable fan blade assembly; the purifier also comprises an electric connecting device, and the electric connecting device is used for communicating a power supply circuit of a motor with a detachable fan blade component when the extension rod is connected with the butt joint rod.
Optionally, the extension bar comprises a buckle cover and a connecting rod, and the buckle cover is positioned on the connecting rod; the electric connecting device is a pogo pin connector arranged on the connecting rod and the butt rod; the spring needle of the spring needle connector is positioned at the end part of the connecting rod, and the corresponding concave surface is positioned at the end part of the butt joint rod; or the spring needle of the spring needle connector is positioned at the end part of the butt joint rod, and the corresponding concave surface is positioned at the end part of the connecting rod; and under the connection state of the extension bar and the butt-joint bar, the spring needle is contacted with the concave surface so as to communicate with a power supply circuit of a motor of the detachable fan blade assembly.
Optionally, the end of the connecting rod is step-shaped, and a notch is formed in the bottom of the connecting rod; a bottom support is arranged at the end part of the butt joint rod and is positioned in the gap; the spring pin connector is arranged between the end part of the connecting rod and the bottom support.
Optionally, the electrical connection means is a plug terminal; the male head of the plug terminal is arranged on the extension rod, and the female head of the plug terminal is arranged on the butt joint rod; or the male head is arranged on the butt joint rod, and the female head is arranged on the extension rod; under the connection state of the extension rod and the butt rod, the male head and the female head are connected in an inserting mode so as to be communicated with a power supply circuit of a motor with a detachable fan blade assembly.
Optionally, the inner wall of clarifier is equipped with a plurality of air-out grid slides that circumference distributes, and the air-out grid of clarifier is located the air-out grid slide, can dismantle between air-out grid and the air-out grid slide and be connected.
Optionally, the bottom of the inclined plane at the periphery of the air outlet grille is provided with a plurality of convex columns extending to the outer side of the inclined plane, the air outlet grille slide way is provided with clamping grooves corresponding to the convex columns, and the convex columns can be clamped into the clamping grooves; the air outlet grid slideway is provided with a radially arranged fixing screw, the fixing screw is positioned near one end of the air outlet grid slideway, which is close to the clamping groove, and the fixing screw is screwed in from the outer side of the shell.
Optionally, the fan blade of the detachable fan blade assembly is located below the motor.
According to the technical scheme of the utility model, can dismantle flabellum subassembly and be used for setting up in the casing, can dismantle flabellum subassembly still includes the detachable connection structure who is connected with the casing, can dismantle connection structure and include a plurality of extension bars and corresponding butt joint pole that extend at the horizontal direction, wherein: the extension bar is connected at the surface that can dismantle flabellum subassembly, and the butt joint pole is connected at shells inner wall to can dismantle between extension bar and the butt joint pole and be connected. The utility model discloses flabellum subassembly can be dismantled by on the casing, conveniently cleans flabellum subassembly, also cleans the clearance for other parts such as wind channel and brings the convenience.
Drawings
For purposes of illustration and not limitation, the present invention will now be described in accordance with its preferred embodiments, particularly with reference to the accompanying drawings, in which:
FIG. 1 is an external structural view of a purifier with detachable fan blades according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a purifier (with an air outlet grille removed) with detachable fan blades according to an embodiment of the present invention;
fig. 3 is a schematic structural view of an air outlet grille according to an embodiment of the present invention;
FIG. 4A is a perspective view of the upper portion of the purifier with detachable fan blades according to the embodiment of the present invention;
FIG. 4B is a partial enlarged view of FIG. 4A;
FIG. 5 is a perspective view of the upper housing of the purifier with detachable fan blades according to the embodiment of the present invention;
FIG. 6 is a perspective view of a blade assembly of a purifier with detachable blades according to an embodiment of the present invention;
FIG. 7 is a schematic view of the upper part of the purifier (with the fastening cover removed from the extension bar) with detachable fan blades according to the embodiment of the present invention;
fig. 8 is a partially enlarged view of fig. 7.
In the figure, 1-air outlet grille, 11-convex column, 12-inclined plane, 2-air outlet grille slideway, 21-clamping groove, 22-fixing screw, 23-baffle angle, 3-locking screw, 4-fan blade, 5-motor, 6-butt joint rod, 61-bottom support, 62-step surface, 7-extension rod, 71-buckle cover, 711-through hole, 72-connecting rod, 721-notch, 8-screw hole, 9-spring needle connector, 10-shell and 30-air channel.
Detailed Description
The utility model discloses among the embodiment, air-out grid and flabellum all can be dismantled, make things convenient for the clearance of flabellum wind channel etc. and specifically explain below.
Fig. 1 shows the external structure of the purifier with detachable fan blades according to the embodiment of the present invention, and an air outlet grid 1 is disposed at the top of the casing 10 of the purifier.
As shown in fig. 2, an air duct 30 is disposed between the inner side of the casing 10 and the fan blade assembly, and a plurality of air outlet grille slideways 2 are circumferentially distributed on the inner wall of the purifier.
Fig. 3 shows the air outlet grille 1 of the embodiment of the present invention, the bottom of the inclined plane 12 at the periphery of the air outlet grille 1 is provided with a plurality of convex columns 11 extending to the outside of the inclined plane 12.
Referring to fig. 4A and 4B, fig. 4A is a perspective view of a detachable fan blade assembly mounted on a purifier housing according to an embodiment of the present invention, and fig. 4B is a partially enlarged view of fig. 4A; details of the air outlet grille slide way 2 can be better seen in fig. 4A and 4B, and a clamping groove 21 corresponding to the convex column 11 is arranged on the air outlet grille slide way 2; one end of the air outlet grille slide way 2, which is far away from the clamping groove 21, is provided with a baffle angle 23, and the baffle angle 23 prevents the air outlet grille 1 from sliding out of the air outlet grille slide way 2; the air outlet grille 1 is placed on the air outlet grille slide 2, the position of the air outlet grille 1 is adjusted, and the convex columns 11 are clamped into the clamping grooves 21 through slight elastic deformation; the air outlet grille slide way 2 is provided with a fixing screw 22 which is arranged along the radial direction of the shell 10, the fixing screw 22 is positioned near one end of the air outlet grille slide way 2 which is close to the clamping groove 21, the fixing screw 22 is screwed in from the outer side of the shell 10, the fixing screw 22 is screwed, the convex column 11 is limited, and therefore the air outlet grille 1 is fixed. The utility model discloses in the embodiment, the length of air-out grid slide 2 is 30mm, and the length of projection 11 is 4mm.
The utility model discloses embodiment's air-out grid 1 can be dismantled, conveniently cleans the inner wall of air-out grid 1, fan blade subassembly and wind channel 30.
As shown in fig. 4A, the outer surface of the fan blade assembly is connected with a plurality of horizontally extending extension rods 7, and the inner wall of the housing 10 is correspondingly provided with a plurality of horizontally extending docking rods 6; the extension bar 7 is detachably connected with the butt joint bar 6; the connection structure of the two can be that the end of the extension bar 7 is positioned above the end of the butt joint bar 6, or the end of the extension bar 7 is positioned below the end of the butt joint bar 6; one end part can be inserted through a gap of the other end part; the two can be detachably connected through relative rotation and alignment, a screw tightening structure and the like.
A plurality of protruding rods 7 are distributed along the circumferential direction of the fan blade assembly and extend along the radial direction of the fan blade assembly; a plurality of docking rods 6 are distributed along the circumferential direction of the housing 10 and extend in the radial direction of the housing 10; the extension bars 7 and the abutment bars 6 are preferably evenly distributed in the circumferential direction.
The end parts of the extension bar 7 and the butt joint bar 6 are provided with step-shaped surfaces, the extension bar 7 and the butt joint bar 6 are attached to each other at the step-shaped surfaces at the end parts, in the figure 4A, the end part of the extension bar 7 is arranged above, the end parts of the extension bar 7 and the butt joint bar 6 are connected through screws, and the screws are connected through locking screws 3. The locking screws 3 are loosened, the fan blade assembly is detached from the air duct 30, and therefore the fan blade assembly can be detached, and the fan blade assembly and the inner wall of the air duct 30 can be conveniently cleaned.
In the embodiment of the utility model, the length of the extension bar 7 and the butt-joint bar 6 is 40mm, the width is 16mm, the height is 20mm, the locking screw adopts a 4 x 8 mechanism screw, the screw diameter is 4mm, and the length is 8mm; the material of the extension rod 7 and the butt joint rod 6 is ABS engineering plastic.
As shown in fig. 5, a screw hole 8 into which the locking screw 3 is inserted is provided on a stepped surface 62 below the docking rod 6.
As shown in fig. 6, the extension bar 7 includes a cover 71 and a link 72, the cover 71 is located above the link 72, and the cover 71 may be a metal groove shape and is fastened to the link 72. The end of the buckle cover 71 is provided with a through hole 711, and the locking screw 3 is connected in the screw hole 8 (see fig. 5) through the through hole 711. The buckle cover 71 made of metal is more stably connected with the butt joint rod 6, the connecting rod 72 is provided with a power supply circuit, and the buckle cover 71 can protect the power supply circuit and is convenient for arrangement of the power supply circuit.
Referring to fig. 6, flabellum subassembly includes flabellum 4 and with flabellum 4 coaxial coupling's motor 5, the utility model discloses embodiment flabellum 4 is in the below of motor 5 for filter core through connection of flabellum 4 and flabellum subassembly below makes and admits air and does not hinder, makes the air quantity performance such as the machine accomplish better level.
As shown in fig. 7, the purifier includes an electrical connection which communicates with the power supply line of the motor 5 of the fan assembly when the connecting rod 72 is connected to the docking rod 6.
The electric connecting device is a contact element arranged on the connecting rod 72 and the butt joint rod 6, the contact element can adopt a pogo pin connector 9 connected in series in a power supply circuit of the motor, the pogo pin connector 9 comprises a pogo pin and a corresponding concave surface, the pogo pin connector 9 is respectively arranged on the connecting rod 72 and the butt joint rod 6, or the connecting rod 72 and the butt joint rod 6 are respectively provided with a corresponding concave surface and a pogo pin at the end part; after the connecting rod 72 is connected with the butt-joint rod 6 in a contraposition way, the spring needle is contacted with the concave surface to form a passage; the spring needle has elasticity, can satisfy the tolerance that produces in the manufacturing process for the installation is more convenient. The pogo pins and the concave surface of the pogo pin connector may each be one or more.
Referring to fig. 6, the end of the connecting rod 72 is stepped, and the bottom is provided with a gap 721; referring to fig. 8, the end of the docking rod 6 is provided with a bottom bracket 61, and the bottom bracket 61 is located in the gap 721 (see fig. 6); a group of spring pins of the spring pin connector 9 are positioned at the end part of the connecting rod 72, a group of corresponding concave surfaces of the spring pin connector 9 are positioned on the bottom support 61, the end part of the connecting rod 72 is lapped on the bottom support 61, and the spring pins of the spring pin connector 9 are inserted into the concave surfaces by the self weight of the fan blade assembly, so that a power supply circuit is conducted. Pogo pin connectors 9 may be pogo pin connectors.
The power supply is connected with the motor 5 through the spring pin connector 9 to supply power to the motor 5, and the blade assembly is taken down to automatically cut off the power supply, so that the blade assembly and the inner wall of the air duct 30 are more convenient to clean. The power supply circuit is directly connected with the fan blade assembly, and the fan blade assembly is not influenced by complex connecting wires when being detached from the air duct 30, so that the convenient detachment of the fan blade assembly is realized.
The utility model discloses in the embodiment, the power of motor 5 is 50W, and the motor is connected to power supply line one side, and one side connects spring needle connector 9.
The electric connection device can also adopt a plug-in terminal which is connected in series in a power supply circuit of the motor, a male head of the plug-in terminal is arranged on the extension bar 7, and a female head is arranged on the butt-joint bar 6, or the male head is arranged on the butt-joint bar 6 and the female head is arranged on the extension bar 7; under the connection state of the extension bar 7 and the butt joint bar 6, the male head and the female head are connected in an inserted mode so as to be communicated with a power supply circuit of the motor 5 of the fan blade assembly.
According to the embodiment of the utility model, the outer surface of the fan blade component of the purifier with detachable fan blades is connected with a plurality of extension rods 7 extending in the horizontal direction, and the inner wall of the shell 10 is correspondingly provided with a plurality of butt-joint rods 6 extending in the horizontal direction; the extension bar 7 is positioned on the butt joint bar 6 and is detachably connected with the butt joint bar. The projecting bar 7 and the abutment bar 6 abut each other at the end stepped surfaces and are connected with locking screws. And the locking screws are loosened, the fan blade assembly is detached from the air duct 30, and the fan blade assembly and the inner wall of the air duct can be conveniently cleaned.
The above detailed description does not limit the scope of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions can occur, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A detachable fan blade assembly comprises a fan blade (4) and a motor (5) which are coaxially connected, and the detachable fan blade assembly is arranged in a shell (10), and is characterized by further comprising a detachable connecting structure connected with the shell (10);
the detachable connection structure comprises a plurality of extension bars (7) extending in a horizontal direction and corresponding docking bars (6), wherein:
the extension bar (7) is connected to the outer surface of the detachable fan blade assembly, the butt joint bar (6) is connected to the inner wall of the shell (10), and the extension bar (7) and the butt joint bar (6) are detachably connected.
2. The removable fan blade assembly of claim 1,
the plurality of the extension rods (7) are uniformly distributed along the circumferential direction of the detachable fan blade assembly, and each extension rod (7) extends along the radial direction of the detachable fan blade assembly;
the butt rods (6) are uniformly distributed along the circumferential direction of the housing (10) and extend along the radial direction of the housing (10).
3. The detachable fan blade assembly of claim 1 or 2, wherein the ends of the protruding bar (7) and the docking bar (6) each have a stepped surface, and the protruding bar (7) and the docking bar (6) fit against each other at the stepped surfaces of the ends and are screwed together.
4. A detachable-vane purifier comprising a housing (10), characterized in that the purifier has a detachable-vane assembly according to any one of claims 1 to 3;
the purifier also comprises an electric connecting device which is used for communicating a power supply circuit of a motor (5) of the detachable fan blade assembly when the extension rod (7) is connected with the butt joint rod (6).
5. The purifier with detachable fan blades according to claim 4, wherein the extension bar (7) comprises a cover (71) and a connecting rod (72), the cover (71) is located on the connecting rod (72);
the electric connecting device is a spring pin connector (9) arranged on the connecting rod (72) and the butt joint rod (6);
the spring needle of the spring needle connector (9) is positioned at the end part of the connecting rod (72), and the corresponding concave surface is positioned at the end part of the butt joint rod (6); or the spring pin of the spring pin connector (9) is positioned at the end part of the butt joint rod (6), and the corresponding concave surface is positioned at the end part of the connecting rod (72);
under the connection state of the extension rod (7) and the butt joint rod (6), the spring needle is contacted with the concave surface so as to communicate with a power supply circuit of a motor (5) of the detachable fan blade assembly.
6. The purifier with detachable fan blades as claimed in claim 5, wherein the end of the connecting rod (72) is stepped, and the bottom of the connecting rod is provided with a notch (721);
a bottom support (61) is arranged at the end part of the butt joint rod (6), and the bottom support (61) is positioned in the gap (721);
the spring pin connector (9) is arranged between the end part of the connecting rod (72) and the bottom support (61).
7. The removable leaf purifier of claim 4, wherein the electrical connection means are plug terminals;
the male head of the plug terminal is arranged on the extension rod (7), and the female head of the plug terminal is arranged on the butt joint rod (6); or the male head is arranged on the butt joint rod (6), and the female head is arranged on the extension rod (7);
under the connection state of the extension rod (7) and the butt joint rod (6), the male head and the female head are connected in an inserted mode to be communicated with a power supply circuit of a motor (5) of the detachable fan blade assembly.
8. The purifier with detachable fan blades according to claim 4, wherein the inner wall of the purifier is provided with a plurality of circumferentially distributed air outlet grille slideways (2), the air outlet grille (1) of the purifier is located on the air outlet grille slideways (2), and the air outlet grille (1) and the air outlet grille slideways (2) are detachably connected.
9. The purifier with detachable fan blades according to claim 8, wherein the bottom of the inclined plane (12) at the periphery of the air outlet grille (1) is provided with a plurality of convex columns (11) extending to the outer side of the inclined plane (12), the air outlet grille slide way (2) is provided with clamping grooves (21) corresponding to the convex columns (11), and the convex columns (11) can be clamped in the clamping grooves (21);
be equipped with radially set up fixed screw (22) on air-out grid slide (2), fixed screw (22) are located near one end of air-out grid slide (2) that is close to draw-in groove (21), and fixed screw (22) are by casing (10) outside screw in.
10. Purifier with detachable fan blades according to claim 4, characterized in that the fan blades (4) of the detachable fan assembly are located below the motor (5).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202222126335.0U CN217929160U (en) | 2022-08-12 | 2022-08-12 | Detachable fan blade assembly and purifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202222126335.0U CN217929160U (en) | 2022-08-12 | 2022-08-12 | Detachable fan blade assembly and purifier |
Publications (1)
Publication Number | Publication Date |
---|---|
CN217929160U true CN217929160U (en) | 2022-11-29 |
Family
ID=84154236
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202222126335.0U Active CN217929160U (en) | 2022-08-12 | 2022-08-12 | Detachable fan blade assembly and purifier |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN217929160U (en) |
-
2022
- 2022-08-12 CN CN202222126335.0U patent/CN217929160U/en active Active
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN1312829C (en) | Motor and electric brush holder | |
CA2277238C (en) | Electric adapter | |
CN217929160U (en) | Detachable fan blade assembly and purifier | |
CN220151454U (en) | Air cleaner of easy dismouting change | |
CN212851608U (en) | Machine tool control cabinet radiator convenient to disassemble and maintain | |
CN117628632A (en) | Detachable fan blade assembly and purifier | |
CN216981686U (en) | Fan housing structure of direct current motor | |
CN217659528U (en) | Conductive connection mechanism of toilet bowl and intelligent toilet bowl | |
CN114587059A (en) | Drying mechanism and shaver cleaning device | |
CN221081026U (en) | Assembled motor end cover | |
CN218385613U (en) | Formaldehyde removal odor purifier and battery pack thereof | |
CN111482008A (en) | Air filter for civil air defense | |
CN219462678U (en) | Filter screen assembly and evaporative humidifier | |
CN210859002U (en) | Motorcycle oil pump flange with built-in filter | |
CN217182651U (en) | Dust protected low-voltage switchgear | |
CN219283565U (en) | Purifying dust collector and air purifier | |
CN214092098U (en) | Detachable fine filter fuel pump assembly with hook type metal base | |
CN204410731U (en) | The fast assembling-disassembling device of vertical type dust collector sea handkerchief filter cartridge | |
CN216304534U (en) | Hair drier | |
CN219979868U (en) | Charging gun with replaceable terminal | |
CN219894231U (en) | Internal air duct structure for hair collector | |
CN216219595U (en) | Fish tank structure with heating function | |
CN210769528U (en) | Fan shell convenient to it is manual clean | |
CN219550578U (en) | Fracture-resistant protective ceramic ignition needle | |
CN219779573U (en) | Heat dissipation regulator cubicle |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant |