CN212458722U - Lockable and cleanable heat energy meter - Google Patents

Lockable and cleanable heat energy meter Download PDF

Info

Publication number
CN212458722U
CN212458722U CN202020862514.9U CN202020862514U CN212458722U CN 212458722 U CN212458722 U CN 212458722U CN 202020862514 U CN202020862514 U CN 202020862514U CN 212458722 U CN212458722 U CN 212458722U
Authority
CN
China
Prior art keywords
flow lumen
valve
liquid
energy meter
flow
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
CN202020862514.9U
Other languages
Chinese (zh)
Inventor
刘焕保
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.)
Baotou Huameng Environmental Protection Energy Saving Technology Development Co ltd
Original Assignee
Baotou Huameng Environmental Protection Energy Saving Technology Development Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baotou Huameng Environmental Protection Energy Saving Technology Development Co ltd filed Critical Baotou Huameng Environmental Protection Energy Saving Technology Development Co ltd
Priority to CN202020862514.9U priority Critical patent/CN212458722U/en
Application granted granted Critical
Publication of CN212458722U publication Critical patent/CN212458722U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Taps Or Cocks (AREA)

Abstract

The utility model discloses a can lock and control washable formula heat energy meter, including lock valve, flow lumen, lock valve and the rotatable positioning sealing connection of flow lumen, the heat energy meter is installed to the inside and upper end of flow lumen, flow lumen outlet end is equipped with the control valve of switching flow lumen outlet end, the liquid reserve tank with flow lumen intercommunication is installed to the flow lumen, wherein, flow lumen and liquid reserve tank even a position be equipped with relative rotation and be equipped with the rolling disc and the ampere disk of big liquid through holes such as correspondence respectively, the rolling disc is 1 through the drive ratio: 1, a bevel gear transmission mechanism is connected with a control valve, and the liquid storage tank is provided with a sealable liquid adding hole; this neotype effect does: the control valve can lock and monitor the heating pipeline, and meanwhile, the meter can be cleaned without detaching the meter, so that the work of detaching the meter, cleaning, checking and re-installing every year in a heating enterprise is omitted.

Description

Lockable and cleanable heat energy meter
Technical Field
The utility model relates to a can lock and wash formula heat energy meter belongs to heat energy meter technical field.
Background
The heat energy meter is an instrument for measuring and displaying the heat released or absorbed by water flowing through the heat exchange system, and is also called an energy meter or a heat meter, and is an intelligent heat meter which is installed at an inlet or an outlet of a heat exchange loop and used for accurately measuring and controlling the heat consumption in heating facilities in a charging way.
The heat energy meter consists of a heat energy meter body and a flow pipe cavity fixed with a shell of the heat energy meter body, wherein the flow pipe cavity is provided with a flow signal reflection column, and the lower part of the heat energy meter body is provided with an energy converter corresponding to the flow signal reflection column. When the heat energy meter works, the flow signal reflection column and the transducer are both soaked in the heating hot water and are in direct contact with the hot water.
After a heating season is finished, the flow tube cavity, the flow signal reflection column and the transducer are scaled in different degrees, so that the accuracy of heat energy meter measurement is affected, therefore, after each heating season is finished, a heat supply enterprise needs to detach each heat energy meter for cleaning, verify the meter again, and then install and use the meter again, the meter with serious scaling needs to be scrapped, the work of detaching, cleaning, verifying and reinstalling the meter every year, and a large number of reported and abandoned meters cause great loss to the heat supply enterprise; in addition, because the existing heat meter can only calculate the used heat and cannot effectively manage heating management, after the user maliciously arrears, the heating pipeline of the arrearage user cannot be thoroughly cut off, and the phenomenon of embezzlement exists.
Disclosure of Invention
The utility model aims to provide a lockable and cleanable heat energy meter, which solves the problem that the flow signal reflecting column and the transducer of the heat energy meter are inconvenient to clean after scaling; the problem of the heat energy meter can't manage locking heating pipeline is solved.
The utility model adopts the technical scheme as follows: a lockable and washable heat meter comprises a locking valve and a flow tube cavity, wherein the locking valve is connected with the water inlet end of the flow tube cavity in a rotatable and positioned and sealed manner, the heat meter is fixed inside and at the upper end of the flow tube cavity, the water outlet end of the flow tube cavity is fixed with a control valve for controlling the opening and closing of the flow tube cavity, the control valve comprises a cylinder body, the cylinder body is fixedly installed at the water outlet end of the flow tube cavity in a sealing manner from right to bottom and is communicated with the inside of the flow tube cavity and blocks the water outlet of the flow tube cavity, the cylinder body is provided with a water outlet communicated with the water outlet end of the flow tube cavity, a rotatable valve core is detachably fixed in the cylinder body in a sealing manner, the upper end of the valve core is of an open cavity structure, the valve core is provided with a water inlet communicated with a water outlet hole, so that the water outlet of the flow tube cavity is communicated, the flow tube cavity and the liquid storage tank are fixedly provided with mounting discs in a connecting cylinder position, the upper end of each mounting disc is fixedly provided with a rotating disc attached to the corresponding mounting disc, the mounting discs and the rotating discs are respectively provided with corresponding equal-size liquid through holes, the liquid storage tank is communicated with the flow tube cavity when the mounting discs are communicated with the liquid through holes of the rotating discs, the rotating discs are connected with the valve cores through bevel gear transmission mechanisms, and the transmission ratio of the bevel gear transmission mechanisms is 1: 1, when the valve core thoroughly blocks the leakage fluid dram, the mounting disc is in concentric relation with the liquid through hole of rolling disc, the liquid reserve tank is opened there is the liquid feeding hole, the liquid feeding hole dismantled and assembled sealed being fixed with the liquid feeding lid, the volume of liquid reserve tank is greater than the volume of the flow lumen between lock valve and the control valve.
Further, the locking valve passes through the rotatable sealing connection of sealed bearing with the flow lumen, wherein, sealed bearing's outer lane and the sealed fixed of locking valve, sealed bearing's the sealed fixed connection cover of inner circle, the one end and the sealed fixed of flow lumen of adapter sleeve, the other end of flow lumen extend to in the locking valve, and open and have the draw-in groove, the mounting hole that corresponds with the draw-in groove has been opened to the locking valve inner wall, slide about being fixed with through the spring in the mounting hole and the fastener of draw-in groove adaptation, the fastener is the spheroid structure, and the fastener is located the draw-in groove and realizes the location.
Further, the locking valve is a mechanical locking valve.
Furthermore, a scale filter screen is fixed on the liquid through hole of the rotating disc.
Furthermore, a driven bevel gear which is horizontally installed is fixed at the upper end of the rotating disc, a driving bevel gear which is concentric with the valve core is meshed with the driven bevel gear, and the driving bevel gear is fixedly connected with the valve core through a connecting rod.
Further, the opening end of the cylinder body is detachably sleeved with a mounting cylinder in a sealing mode, the mounting cylinder is rotatably and hermetically connected with the valve core, and the valve core extends out of the cylinder body and is fixedly provided with a hand wheel.
The beneficial effects of the utility model reside in that:
the utility model is provided with the locking valve, can effectively manage the lock control heating pipeline, and can effectively avoid the phenomenon that the user with malicious arrearage can continue heating after arrearage; in addition, because the heating point is different to every user's pipeline distance or the heating pipeline is located the floor height of difference, it is also different to lead to required warm water flow, consequently adopts the warm water flow that mechanical locking valve can artificial control heating pipeline, reduces the waste of heat energy and electric energy, also makes the pressure that the heating pipeline bore simultaneously can regulate and control, reduces the probability that the damage appears in the heating pipeline.
The utility model discloses lock valve and flow lumen rotatable coupling, and the play water end position of flow lumen is equipped with the control valve, can block the delivery port of flow lumen, rotate the flow lumen and make the liquid reserve tank be located the top when, then lock valve and control valve block flow lumen both ends when, make the flow lumen form airtight cavity, simultaneously when the control valve blocks the flow lumen, just liquid reserve tank and the airtight cavity intercommunication of flow lumen, descaling liquid does not cut off and goes into the flow body, until being full of the airtight cavity of the flow jar body, rotate the liquid reserve tank and be located the below when, descaling liquid in the flow lumen flows into the liquid reserve tank, after descaling liquid all flows into the liquid reserve tank from the flow lumen, thoroughly open the control valve, flow lumen and liquid reserve tank block this moment, control lock valve can heat, and then make and need not to carry out the dismouting washing to the heat energy meter, the heat supply enterprise tears the table to wash every year, The work of check-up, reinstallation has not only practiced thrift a large amount of expenses for the heat supply enterprise, has prolonged the life of heat energy meter moreover, and descaling liquid can also recycle simultaneously, reduces the cost of heat supply enterprise.
The utility model is provided with the detachable valve core which is inclined, can collect scale residue in the flow tube cavity, and prevent the residue from flowing along with warm water and even blocking a heating pipeline to influence the heating effect; in addition, when the pipeline appears leaking in user's house, the accessible is rotated the case and is in time closed the heating pipeline, reduces user and heating enterprise's economic loss.
Drawings
Fig. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a schematic view of the novel front view cross-section structure.
Fig. 3 is a schematic view of the novel front view partial section structure.
In the figure: the device comprises a locking valve 1, a sealing bearing 2, a connecting sleeve 3, a clamping groove 4, a clamping piece 5, a mounting hole 6, a spring 7, a flow tube cavity 8, a water inlet end 8-1 of the flow tube cavity, a water outlet end 8-2 of the flow tube cavity, a heat meter 9, a control valve 10, a cylinder body 10-1, a valve core 10-2, a water inlet hole 10-3, a mounting cylinder 10-4, a driven bevel gear 10-5, a driving bevel gear 10-6, a connecting rod 10-7, a water outlet 10-8, a liquid storage tank 11, a liquid adding hole 11-1, a liquid adding cover 11-2, a mounting disc 12, a rotating disc 13, a liquid through hole 14 and a hand wheel 15.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings, which are only used for illustrating the technical solutions of the present invention and are not limited.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
As shown in fig. 1, 2 and 3, a lockable and washable heat meter 9 comprises a locking valve 1 and a flow tube cavity 8, wherein the locking valve 1 (the locking valve 1 is not described in detail in the prior art) is connected with a water inlet end 8-1 of the flow tube cavity in a rotatable, positioned and sealed manner, the heat meter 9 is fixed in the flow tube cavity 8 and at the upper end thereof through fastening screws (the working principle of the heat meter 9 and the components thereof are not described in detail in the prior art), a control valve 10 for controlling the opening and closing of the flow tube cavity 8 is fixed at a water outlet end of the flow tube cavity 10, the control valve 10 comprises a cylinder 10-1, the cylinder 10-1 is fixedly installed at the water outlet end 8-2 of the flow tube cavity in a manner of right-oblique downward sealing welding and is communicated with the interior of the flow tube cavity and blocks a water outlet of the flow tube cavity 8, the cylinder 10-1 is provided with a water outlet 10-8 communicated with the water outlet, a rotatable valve core 10-2 is detachably and hermetically fixed in the cylinder body 10-1, wherein the upper end of the valve core 10-2 is of an open cavity structure, the valve core 10-2 is provided with a water inlet hole 10-3 communicated with a water drain hole so that a water outlet of a flow tube cavity 8 is communicated with or blocked from the inside of the flow tube cavity 8, the flow tube cavity 8 right below the heat meter 9 is fixedly welded with a liquid storage box 11 communicated with the flow tube cavity 8, wherein a mounting plate 12 is fixedly welded at the connecting cylinder position of the flow tube cavity 8 and the liquid storage box 11, the upper end of the mounting plate 12 is fixedly provided with a rotating plate 13 attached to the mounting plate 12 through a pin shaft, the mounting plate 12 and the rotating plate 13 are respectively provided with corresponding liquid through holes 14 with equal size, the liquid storage box 11 is communicated with the flow tube cavity 8 when the mounting plate 12 is communicated with the liquid through holes 14 of the rotating plate 13, the rotating plate 13 is connected with the valve core 10, wherein the transmission ratio of the bevel gear transmission mechanism is 1: 1, when the valve core 10-2 completely blocks a liquid discharge port, a mounting disc 12 and a liquid through hole 14 of a rotating disc 13 are in a concentric relation, a liquid adding hole 11-1 is formed in a liquid storage box 11, a liquid adding cover 11-2 is detachably, hermetically and fixedly arranged on the liquid adding hole 11-1 through threaded engagement, and the volume of the liquid storage box 11 is larger than that of a flow pipe cavity 8 between a locking valve 1 and a control valve 10.
In this embodiment, the rotatable sealing connection of lock valve 1 and flow lumen 8 is through sealed bearing 2, wherein, sealed bearing 2's outer lane and the sealed welded fastening of lock valve 1, sealed bearing 2's inner circle sealed welded fastening adapter sleeve 3, the one end and the sealed welded fastening of flow lumen 8 of adapter sleeve 3, the other end of flow lumen 8 extends to in the lock valve 1, and opens and have draw-in groove 4, the mounting hole 6 that corresponds with draw-in groove 4 is opened to lock valve 1 inner wall, slide and the fastener 5 of draw-in groove 4 adaptation about being fixed with through spring 7 in the mounting hole 6, wherein, the both ends of spring 7 are respectively in fastener 5 and 6 welded fastening of mounting hole and are connected, fastener 5 is the sphere structure, and fastener 5 is located and realizes the location in draw-in groove 4.
In this embodiment, the lock valve 1 is a mechanical lock valve 1.
In this embodiment, a scale filter (not shown) is fixed to the water outlet by a fastening screw.
In this embodiment, a scale filter (not shown) is fixed to the liquid passage hole 14 of the rotary disk 13 by a fastening screw.
In this embodiment, the left upper end of the valve core 10-2 and the bottom of the flow tube cavity 8 are located on the same horizontal plane, so as to ensure that scale residues in the flow tube cavity 8 can enter the cavity of the valve core 10-2 along with water flow.
In the embodiment, a driven bevel gear 10-5 which is horizontally installed is welded and fixed at the upper end of the rotating disc 13, a driving bevel gear 10-6 which is concentric with the valve core 10-2 is meshed with the driven bevel gear 10-5, and the driving bevel gear 10-6 is fixedly connected with the valve core 10-2 through a connecting rod 10-7 in a welding manner.
In the embodiment, the open end of the cylinder body 10-1 is detachably sleeved and hermetically fixed with an installation cylinder 10-4 through threaded engagement, the installation cylinder 10-4 and the valve core 10-2 are rotatably and hermetically connected through a sealing bearing, and the valve core 10-2 extends out of the cylinder body 10-1 and is welded with a fixed hand wheel 15.
The utility model discloses a theory of operation and application method:
when the lock valve is used, the lock valve is connected to a household pipeline of residents, and the lock valve 1 can be used for lock control supervision of the heating pipelines of the residents.
When a heating season is over, water in a heating pipeline is discharged, at the moment, the liquid adding cover 11-2 is unscrewed, a certain amount of descaling liquid is added into the liquid storage tank 11, the flow pipe cavity 8 is rotated to be matched with the clamping groove 4 through the clamping piece 5 for positioning, when the liquid storage tank 11 is positioned right above, the locking valve 1 and the control valve 10 simultaneously block two ends of the flow pipe cavity 8, so that the flow pipe cavity 8 forms a closed cavity, meanwhile, when the hand wheel 15 is rotated to drive the valve core 10-2 to rotate ninety degrees, and the valve core 10-2 blocks the flow pipe cavity 8, the rotating disc 13 is just driven to rotate through the bevel gear transmission mechanism, the liquid through hole 14 of the rotating disc 13 simultaneously rotates ninety degrees and is concentric with the liquid through hole 14 of the fixed disc, the liquid storage tank 11 is communicated with the closed cavity of the flow pipe cavity 8, and the descaling liquid flows into the flow pipe body without breaking until the flow; waiting until next heating season comes, begin to fill water in the heat supply pipeline, when being located under with liquid reserve tank 11 rotation, the descaling liquid of flow lumen 8 flows into liquid reserve tank 11, after descaling liquid all flowed into liquid reserve tank 11 from flow lumen 8, thoroughly rotate case 10-2 ninety degrees through hand wheel 15, flow lumen 8 blocks with liquid reserve tank 11 this moment, open lock valve 1, the heating pipeline intercommunication can heat, the incrustation scale residue in flow lumen 8 subsides inside case 10-2 cavity along with rivers, it can to unpack case 10-2 clearance regularly. Because the flow tube cavity 8 is filled with the descaling liquid in the heating-down period, water scale accumulated on the inner wall of the flow tube cavity 8 and parts of the heat meter 9 positioned in the flow tube cavity 8 is dissolved in the descaling liquid, and when the water scale is settled in the valve core 10-2 along with water flow, the flow tube cavity 8 is very clean, the metering precision is improved, and the service life is prolonged.
Although the present invention has been described in detail with reference to the foregoing examples, it will be apparent to those skilled in the art that various changes and modifications can be made in the embodiments described above, or equivalent changes and modifications can be made to some of the technical features of the embodiments described above, and any changes, equivalents, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (8)

1. The utility model provides a can lock and wash formula heat energy meter, includes lock valve, flow lumen, characterized by: the locking valve is connected with the rotatable positioning sealing of flow lumen, the heat energy meter is installed to flow lumen inside and upper end, flow lumen outlet end is equipped with the control valve of control flow lumen switching, the liquid reserve tank with flow lumen intercommunication is installed to the flow lumen under the heat energy meter, wherein, even a section of thick bamboo position of flow lumen and liquid reserve tank is equipped with relative rotation and is equipped with carousel and mounting disc that corresponds big feed-through hole such as just respectively, mounting disc and flow lumen fixed connection, the carousel passes through the drive ratio and is 1: the bevel gear transmission mechanism of the device 1 is connected with a control valve, when the control valve thoroughly blocks a liquid outlet, a mounting disc and a liquid through hole of a rotating disc are in a concentric relation, a liquid storage tank is provided with a sealable liquid adding hole, and the volume of the liquid storage tank is larger than that of a flow pipe cavity between a locking valve and the control valve.
2. The lockable and washable thermal energy meter as recited in claim 1, further comprising: the locking valve passes through the rotatable sealing connection of sealed bearing with the flow lumen, wherein, sealed bearing's outer lane and the sealed fixed of locking valve, sealed bearing's the sealed fixed connection cover of inner circle, the one end and the sealed fixed of flow lumen of adapter sleeve, the other end of flow lumen extend to in the locking valve, and open and have the draw-in groove, the mounting hole that has and the draw-in groove to correspond is opened to the locking valve inner wall, slide about being fixed with through the spring in the mounting hole and the fastener of draw-in groove adaptation, the fastener is the sphere structure, and the fastener is located the draw-in groove and realizes the location.
3. The lockable and washable thermal energy meter as recited in claim 1, further comprising: the locking valve is a mechanical locking valve.
4. The lockable and washable thermal energy meter as recited in claim 1, further comprising: and a scale filter screen is arranged in the liquid through hole of the rotating disc.
5. The lockable and washable thermal energy meter as recited in claim 1, further comprising: a driven bevel gear which is horizontally arranged is fixed at the upper end of the rotating disc, the driven bevel gear is meshed with a driving bevel gear which is concentric with the valve core, and the driving bevel gear is fixedly connected with the valve core through a connecting rod.
6. The lockable and washable thermal energy meter as recited in claim 1, further comprising: the control valve comprises a cylinder body, the cylinder body is arranged at the water outlet end of the flow tube cavity in a right-oblique downward mode, is communicated with the inside of the flow tube cavity and blocks the water outlet of the flow tube cavity, a water outlet communicated with the water outlet end of the flow tube cavity is formed in the cylinder body, a detachable, sealed and rotatable valve core is arranged in the cylinder body, the upper end of the valve core is of an open cavity structure, and a water inlet communicated with the water outlet hole is formed in the valve core, so that the water outlet of the flow tube cavity is communicated with or blocked from the inside of.
7. The lockable and washable thermal energy meter as recited in claim 6, further comprising: the opening end of the cylinder body is detachably sleeved with a mounting cylinder in a sealing and fixing mode, the mounting cylinder is rotatably and hermetically connected with the valve core, and the valve core extends out of the cylinder body and is fixedly provided with a hand wheel.
8. The lockable and washable thermal energy meter as recited in claim 1, further comprising: the liquid feeding hole is detachably and hermetically fixed with a liquid feeding cover.
CN202020862514.9U 2020-05-21 2020-05-21 Lockable and cleanable heat energy meter Active CN212458722U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020862514.9U CN212458722U (en) 2020-05-21 2020-05-21 Lockable and cleanable heat energy meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020862514.9U CN212458722U (en) 2020-05-21 2020-05-21 Lockable and cleanable heat energy meter

Publications (1)

Publication Number Publication Date
CN212458722U true CN212458722U (en) 2021-02-02

Family

ID=74482512

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020862514.9U Active CN212458722U (en) 2020-05-21 2020-05-21 Lockable and cleanable heat energy meter

Country Status (1)

Country Link
CN (1) CN212458722U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113028487A (en) * 2021-03-11 2021-06-25 瑞昌市金宇铜业制造有限公司 Divide water collector with automatic scrubbing function

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113028487A (en) * 2021-03-11 2021-06-25 瑞昌市金宇铜业制造有限公司 Divide water collector with automatic scrubbing function
CN113028487B (en) * 2021-03-11 2022-05-24 瑞昌市金宇铜业制造有限公司 Divide water collector with automatic scrubbing function

Similar Documents

Publication Publication Date Title
CN212458722U (en) Lockable and cleanable heat energy meter
CN201637451U (en) Flow control device of dry-type water meter
CN101339066A (en) Large dam seepage quantity high precision flow gauge
CN110497527A (en) A kind of simple accurate water metering device
CN216678010U (en) Constant-temperature liquid preparation machine
CN115492978A (en) Easily overhaul monolithic formula middling pressure trap
CN213337231U (en) Environment supervision is with on-spot air dust monitoring devices
CN202082405U (en) Dripping-preventing intermittent flow valve
CN203615973U (en) Vertical type wireless teletransmission valve control meter with plastic housing
CN209979413U (en) Dissolved gas crude oil wax deposition testing device
CN219142063U (en) Convenient abluent heat energy table
CN211121436U (en) Wide-range corrosion-resistant stainless steel water meter
CN112729449A (en) Fine-adjustment protective water meter
CN201269766Y (en) High precise flowmeter for dam leakage
CN216440689U (en) Clinical laboratory uses checkout stand convenient to liquid water disposal
CN112856239B (en) But intelligent water gauge of split combined type
CN218713584U (en) Emergency water supply device of water supply equipment
CN219757440U (en) Backflow-preventing stainless steel water meter shell
CN213779158U (en) Horizontal spiral wing detachable dry type hot water meter
CN220550185U (en) Plant cell culture device
CN220816650U (en) Drainage and condensation valve and instrument pressure guiding pipe
CN220834493U (en) Y-shaped filtering device
CN220683522U (en) Liquid metering tank convenient to open and shut
CN217503797U (en) Opening and closing system for heat metering charging
CN216695198U (en) Device for preventing material blockage in magnetic turning plate liquid level meter

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant