CN111852305A - Rolling slats door system in rubbish compression storehouse - Google Patents
Rolling slats door system in rubbish compression storehouse Download PDFInfo
- Publication number
- CN111852305A CN111852305A CN202010517679.7A CN202010517679A CN111852305A CN 111852305 A CN111852305 A CN 111852305A CN 202010517679 A CN202010517679 A CN 202010517679A CN 111852305 A CN111852305 A CN 111852305A
- Authority
- CN
- China
- Prior art keywords
- bin
- photoelectric sensor
- door
- type photoelectric
- controller
- 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
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
- E06B9/08—Roll-type closures
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/28—Other arrangements on doors or windows, e.g. door-plates, windows adapted to carry plants, hooks for window cleaners
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
- E06B9/68—Operating devices or mechanisms, e.g. with electric drive
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
- E06B9/68—Operating devices or mechanisms, e.g. with electric drive
- E06B2009/6809—Control
- E06B2009/6818—Control using sensors
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
- E06B9/68—Operating devices or mechanisms, e.g. with electric drive
- E06B2009/6809—Control
- E06B2009/6818—Control using sensors
- E06B2009/6827—Control using sensors sensing light
Abstract
The invention discloses a rolling door system of a garbage compression bin, which comprises a bin entrance rolling door arranged at the entrance of the garbage compression bin, wherein a ground sensing coil group is buried in the ground outside the entrance of the garbage compression bin, a first radar with the detection direction facing the outside of the garbage compression bin is arranged on the bin entrance rolling door, a first opposite-emitting photoelectric sensor with the detection direction vertical to the bin entrance direction of a vehicle is arranged in the garbage compression bin, the ground sensing coil group, the first radar and the first opposite-emitting photoelectric sensor are all connected with the input end of a controller, and the bin entrance rolling door is connected with the output end of the controller. The roller shutter door system of the garbage compression bin can prevent a roller shutter door from falling down to hit a vehicle and effectively prevent garbage smell from diffusing, improves the safety of garbage loading work and reduces environmental pollution caused by leakage of the garbage smell.
Description
Technical Field
The invention belongs to the technical field of environmental sanitation equipment, and particularly relates to a roller shutter door system of a garbage compression bin.
Background
The roller shutter door of the existing garbage compression bin is mostly controlled in a delayed mode, and the roller shutter door can be closed after being opened for a certain time. Because the closing time is fixed, when vehicles such as a garbage transfer vehicle enter and exit the garbage compression bin in a backing mode, if the time set by delay is exceeded, the rolling door may fall down and hit the passing vehicle, so that equipment damage and safety accidents are caused. In addition, the rolling door is closed in a timing delay mode, after vehicles enter or leave the bin, the rolling door cannot be closed immediately, but the rolling door is closed after a set time, so that the smell of garbage is easy to diffuse out of the garbage compression bin in the period, and the environment is polluted.
Disclosure of Invention
In view of the above disadvantages, the present invention provides a roller shutter door system for a garbage compression bin, capable of preventing a roller shutter door from dropping down to hit a vehicle and effectively preventing garbage odor from diffusing, and the technical scheme adopted by the roller shutter door system is as follows:
the utility model provides a rolling slats door system in rubbish compression storehouse, is including setting up the entry rolling slats door in rubbish compression storehouse entrance, ground induction coil group has been buried underground on the entry outside ground in rubbish compression storehouse, advances to be equipped with on the rolling slats door of storehouse detection direction outside the rubbish compression storehouse first radar, is equipped with the first correlation type photoelectric sensor that direction and vehicle advance storehouse direction vertically in the rubbish compression storehouse, ground induction coil group, first radar, first correlation type photoelectric sensor all are connected with the input of controller, advance the rolling slats door of storehouse and are connected with the output of controller.
Therefore, when the carrying vehicle passes by the ground induction coil group, the ground induction coil group sends a signal to the controller, and the controller sends an instruction to control the warehouse entry roller shutter door to be opened so that the carrying vehicle can enter the garbage compression warehouse. In order to ensure that the warehouse entry roller shutter door cannot fall down and simultaneously trigger the first radar to work, the first radar continuously detects the position of a carrying vehicle and sends a signal to the controller, and when the carrying vehicle is within the detection range of the radar, the controller outputs an instruction to control the warehouse entry roller shutter door to be kept in an open state. Thereby avoiding the safety problem caused by the accidental falling of the roller shutter door.
Preferably, a sealing rolling door connected with the output end of the controller is arranged in the garbage compression bin, and the sealing rolling door divides the space in the bin of the garbage compression bin into a loading area positioned on the inner side and a passageway area positioned on the outer side. When a carrying vehicle enters the garbage compression bin and moves to the detection position of the first opposite-type photoelectric sensor, the first radar is closed, the first opposite-type photoelectric sensor sends a signal to the controller to output an instruction to control the entry rolling door to be kept in an open state until the carrying vehicle moves towards the interior of the bin to the detection position away from the first opposite-type photoelectric sensor, and the first opposite-type photoelectric sensor controls the entry rolling door to be closed immediately.
Preferably, the aisle area is provided with a second opposite-emitting type photoelectric sensor connected with the input end of the controller, and the detection direction of the second opposite-emitting type photoelectric sensor is perpendicular to the vehicle entering direction. When the carrying vehicle moves to the detection position of the second opposite emission type photoelectric sensor, the controller sends an instruction to control the opening of the sealing rolling door, so that the carrying vehicle can enter the loading area to load materials, the warehouse entering rolling door is closed at the moment, and the garbage smell can be prevented from overflowing from the warehouse. When the delivery vehicle is taken out of the warehouse after the goods are loaded, the delivery vehicle moves to a detection position away from the second opposite emission type photoelectric sensor, and the sealing rolling door is closed immediately, so that the smell of the garbage is sealed in the loading area. When the carrying vehicle moves to the detection position of the first opposite-emitting photoelectric sensor, the first opposite-emitting photoelectric sensor controls the entrance rolling door to be opened until the carrying vehicle is closed after completely leaving the detection position of the first opposite-emitting photoelectric sensor.
Preferably, the first correlation type photosensor is located in the aisle area, and the second correlation type photosensor is located between the first correlation type photosensor and the sealing rolling door.
In another embodiment, the sealing rolling door is provided with a second radar connected with the input end of the controller, and the detection direction of the second radar faces to the aisle area. In addition to the above-mentioned detection by the second correlation photoelectric sensor, a second radar for detecting toward the aisle area may be provided on the sealing rolling door instead of the detection by the second correlation photoelectric sensor.
Preferably, a door frame of the entry rolling door is provided with a third correlation type photoelectric sensor connected with an input end of the controller, and a detection direction of the third correlation type photoelectric sensor is perpendicular to an entry direction of the vehicle. The third correlation type photoelectric sensor plays a protective role, and the warehouse entry roller shutter door can be closed only after the carrying vehicle still needs to leave the third correlation type photoelectric sensor.
Preferably, a fourth correlation type photoelectric sensor connected with an input end of the controller is arranged on a door frame of the sealing rolling door, and the detection direction of the fourth correlation type photoelectric sensor is perpendicular to the vehicle entering direction. The fourth correlation type photoelectric sensor also plays the guard action, and the sealed rolling slats door just can close after the delivery vehicle still need leave fourth correlation type photoelectric sensor.
Preferably, the ground induction coil group comprises a first ground induction coil and a second ground induction coil which are sequentially arranged along the vehicle cabin entering direction. In order to prevent other vehicles from mistakenly touching the induction coil group when passing by, so that the warehouse entry roller shutter door is opened. The ground induction coil group is set into a first ground induction coil and a second ground induction coil which are sequentially arranged along the vehicle cabin entering direction. And only when the carrying vehicle passes through the first ground induction coil and the second ground induction coil, the warehouse entry roller shutter door is triggered to be opened and the first radar works.
The invention has the beneficial effects that: the roller shutter door system of the garbage compression bin can prevent a roller shutter door from falling down to hit a vehicle and effectively prevent garbage smell from diffusing, improves the safety of garbage loading work and reduces environmental pollution caused by leakage of the garbage smell.
Drawings
FIG. 1 is a schematic perspective view of a bladder welding system in an embodiment of the present invention;
in the figure: a garbage compression bin-1; a loading area-101; a pass-through zone-102; a warehousing roller shutter door-2; a first radar-3; a first opposed-emission type photosensor-4; sealing the roller shutter door-5; a second correlation conduit-6; a second radar-7; a third correlation type photosensor-8; a fourth correlation type photosensor-9; a first ground induction coil-10; a second ground sensing coil-11; a carrier vehicle-12.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the roller shutter door system of the garbage compression bin of the present embodiment mainly includes a bin entrance roller shutter door 2 and a sealing roller shutter door 5 connected to an output end of a controller, and a first radar 3, a first correlation type photoelectric sensor 4, a second correlation type photoelectric sensor 6, a second radar 7, a third correlation pipeline 8, a fourth correlation type photoelectric sensor 9, a first ground sensing coil 10, and a second ground sensing coil 11 connected to an input end of the controller.
An inlet rolling door 2 is arranged at the inlet of the garbage compression bin 1, and the inlet rolling door 2 is used for controlling a carrying vehicle 12 to enter or exit the garbage compression bin 1. The warehouse entry rolling door 2 is provided with a first radar 3 for detecting towards the outside of the warehouse and used for detecting the position of a warehouse entry vehicle. The ground induction coil group is arranged on the ground outside the inlet of the garbage compression bin 1, when the carrying vehicle 12 passes by the ground induction coil group, the ground induction coil group sends a signal to the controller, and the controller sends an instruction to control the bin-entering rolling door 2 to be opened so that the carrying vehicle 12 can enter the garbage compression bin 1. In order to ensure that the warehouse entry roller door 2 cannot fall down and simultaneously trigger the first radar 3 to work, the first radar 3 continuously detects the position of the carrying vehicle 12 and sends a signal to the controller, and when the carrying vehicle 12 is within the detection range of the radar 3, the controller outputs an instruction to control the warehouse entry roller door 2 to keep an open state.
A sealing rolling door 5 is arranged in the garbage compression bin 1, and the sealing rolling door 5 divides the garbage compression bin 1 into a loading area 101 at the inner side and a passageway area 102 at the outer side. A first opposite-type photoelectric sensor 4 is arranged on one side of the passageway area 102 close to the warehouse entry roller door 2, when the carrying vehicle 12 enters the garbage compression warehouse 1 and moves to the detection position of the first opposite-type photoelectric sensor 4, the first radar 3 is turned off, the first opposite-type photoelectric sensor 4 sends a signal to the controller to output an instruction to control the warehouse entry roller door 2 to keep an opening state until the carrying vehicle 12 moves towards the warehouse to leave the detection position of the first opposite-type photoelectric sensor 4, and the first opposite-type photoelectric sensor 4 controls the warehouse entry roller door 2 to be turned off in a vertical motor mode.
Similarly, a second opposite emission type photoelectric sensor 6 is arranged on one side, close to the entrance sealing rolling door 5, of the aisle area 102, when the carrying vehicle 12 moves to the detection position of the second opposite emission type photoelectric sensor 6, the controller sends an instruction to control the opening of the sealing rolling door 5, so that the carrying vehicle 12 can enter the loading area 101 to load materials, and at the moment, the entrance rolling door 2 is closed, and the garbage smell can be prevented from overflowing from the bin. Instead of using the second correlation photosensor 6 for detection, a second radar 7 may be provided on the sealing shutter 5 for detecting the passage area 12 instead of using the second correlation photosensor 6 for detection.
When the carrying vehicle 12 is taken out after loading the goods, the carrying vehicle moves to a detection position away from the second opposite emission type photoelectric sensor 6, and the controller sends a command to control the sealing rolling door 5 to be closed immediately, so that the garbage smell is sealed in the loading area. When the carrying vehicle 12 moves to the detection position of the first opposite-emitting photoelectric sensor 4, the controller sends a command to control the entrance rolling door 2 to be opened until the carrying vehicle 12 is closed after completely leaving the detection position of the first opposite-emitting photoelectric sensor 4.
In order to further improve the safety performance, a third correlation type photoelectric sensor 8 is installed on a door frame of the warehousing rolling door 2, a fourth correlation type photoelectric sensor 9 is installed on a door frame of the sealing rolling door 5, and after the delivery vehicle 12 still leaves the third correlation type photoelectric sensor 8 and the fourth correlation type photoelectric sensor 9, the warehousing rolling door 2 and the sealing rolling door 5 can be closed, so that the secondary protection effect is achieved.
In order to prevent other vehicles from mistakenly touching the induction coil group when passing by, so as to prevent the warehouse entry roller door 2 from opening. The ground induction coil group is provided with a first ground induction coil 10 and a second ground induction coil 11 which are sequentially arranged along the vehicle cabin entering direction. Only when the carrying vehicle 12 passes through the first ground induction coil 10 and then passes through the second ground induction coil 11, the opening of the entry rolling door 2 and the operation of the first radar 3 are triggered.
Claims (8)
1. The utility model provides a rolling slats door system in rubbish compression storehouse, is including setting up the entry rolling slats door in rubbish compression storehouse entrance, its characterized in that: the ground sensing coil group is buried in the ground outside the inlet of the garbage compression bin, a first radar with the detection direction facing the outside of the garbage compression bin is arranged on the bin entering rolling door, a first opposite-emitting type photoelectric sensor with the detection direction vertical to the bin entering direction of a vehicle is arranged in the garbage compression bin, the ground sensing coil group, the first radar and the first opposite-emitting type photoelectric sensor are all connected with the input end of the controller, and the bin entering rolling door is connected with the output end of the controller.
2. The trash compaction bin roller door system of claim 1, wherein: the garbage compression bin is internally provided with a sealing rolling door connected with the output end of the controller, and the space in the bin of the garbage compression bin is divided into a loading area positioned on the inner side and a passageway area positioned on the outer side by the sealing rolling door.
3. The trash compaction bin roller door system of claim 2, wherein: and the passageway area is provided with a second opposite-emission type photoelectric sensor connected with the input end of the controller, and the detection direction of the second opposite-emission type photoelectric sensor is vertical to the vehicle entering direction.
4. The trash compaction bin roller door system of claim 3, wherein: the first opposite-type photoelectric sensor is positioned in the passageway area, and the second opposite-type photoelectric sensor is positioned between the first opposite-type photoelectric sensor and the sealing rolling door.
5. The trash compaction bin roller door system of claim 2, wherein: and a second radar connected with the input end of the controller is arranged on the sealing rolling door, and the detection direction of the second radar faces to the aisle area.
6. The trash compaction bin roller door system of claim 2, wherein: and a door frame of the warehouse entry roller shutter door is provided with a third correlation type photoelectric sensor connected with the input end of the controller, and the detection direction of the third correlation type photoelectric sensor is vertical to the warehouse entry direction of the vehicle.
7. The trash compaction bin roller door system of claim 2, wherein: the door frame of the sealing rolling door is provided with a fourth correlation type photoelectric sensor connected with the input end of the controller, and the detection direction of the fourth correlation type photoelectric sensor is perpendicular to the vehicle entering direction.
8. A roller door system for a refuse compression bin according to any one of claims 1 to 7, wherein: the ground induction coil group comprises a first ground induction coil and a second ground induction coil which are sequentially arranged along the vehicle warehouse entering direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010517679.7A CN111852305B (en) | 2020-06-09 | 2020-06-09 | Rolling slats door system in rubbish compression storehouse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010517679.7A CN111852305B (en) | 2020-06-09 | 2020-06-09 | Rolling slats door system in rubbish compression storehouse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111852305A true CN111852305A (en) | 2020-10-30 |
| CN111852305B CN111852305B (en) | 2022-02-22 |
Family
ID=72986376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010517679.7A Active CN111852305B (en) | 2020-06-09 | 2020-06-09 | Rolling slats door system in rubbish compression storehouse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111852305B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112722652A (en) * | 2021-01-19 | 2021-04-30 | 重庆市环卫集团有限公司 | Isolation shed for butt joint of semitrailer and garbage compressor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201390505Y (en) * | 2009-04-10 | 2010-01-27 | 重庆耐德新明和工业有限公司 | Waste transfer station for preventing dust and odor from diffusing |
| CN205690408U (en) * | 2016-06-24 | 2016-11-16 | 温州中环正源水务有限公司 | Semi-dry sludge processing equipment |
| CN205771292U (en) * | 2016-06-27 | 2016-12-07 | 重庆市固体废弃物运输有限公司 | A kind of horizontal rubbish compression linked system |
| EP3369883A1 (en) * | 2015-10-29 | 2018-09-05 | Bunka Shutter Co., Ltd. | Opening and closing device control system |
| CN208894751U (en) * | 2018-08-02 | 2019-05-24 | 广州万邦净化科技有限公司 | Automatic shutter goods drenches room |
| CN110641885A (en) * | 2019-11-13 | 2020-01-03 | 长沙普惠环保机械有限公司 | Buried garbage transfer station |
-
2020
- 2020-06-09 CN CN202010517679.7A patent/CN111852305B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201390505Y (en) * | 2009-04-10 | 2010-01-27 | 重庆耐德新明和工业有限公司 | Waste transfer station for preventing dust and odor from diffusing |
| EP3369883A1 (en) * | 2015-10-29 | 2018-09-05 | Bunka Shutter Co., Ltd. | Opening and closing device control system |
| CN205690408U (en) * | 2016-06-24 | 2016-11-16 | 温州中环正源水务有限公司 | Semi-dry sludge processing equipment |
| CN205771292U (en) * | 2016-06-27 | 2016-12-07 | 重庆市固体废弃物运输有限公司 | A kind of horizontal rubbish compression linked system |
| CN208894751U (en) * | 2018-08-02 | 2019-05-24 | 广州万邦净化科技有限公司 | Automatic shutter goods drenches room |
| CN110641885A (en) * | 2019-11-13 | 2020-01-03 | 长沙普惠环保机械有限公司 | Buried garbage transfer station |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112722652A (en) * | 2021-01-19 | 2021-04-30 | 重庆市环卫集团有限公司 | Isolation shed for butt joint of semitrailer and garbage compressor |
| CN112722652B (en) * | 2021-01-19 | 2022-03-15 | 重庆市环卫集团有限公司 | Isolation shed for butt joint of semitrailer and garbage compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111852305B (en) | 2022-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111852305B (en) | Rolling slats door system in rubbish compression storehouse | |
| RU2571654C2 (en) | System of door control with obstacle detection | |
| CN207417594U (en) | Full-automatic hopper | |
| CN105929774A (en) | System for monitoring transportation process of slag car | |
| CN109607001A (en) | A kind of kitchen waste cart push plate unloading control method | |
| CN1775598A (en) | Automatic buffer collision-preventing system for manless carrier vehicle | |
| TW201430197A (en) | Vertical conveying device for conveying garbage | |
| CN202625131U (en) | Full-intelligent underground garbage transfer storage | |
| CN211828160U (en) | Electron accelerator | |
| US20200332586A1 (en) | Swing door operator | |
| CN207061014U (en) | A kind of intelligent garbage bin robot | |
| CN101786536B (en) | Detection object conveying system | |
| CN207956745U (en) | A kind of self-discharging garbage vehicle | |
| CN205526608U (en) | Self -service consign luggage equipment emergency exit | |
| CN217707350U (en) | Garbage transfer station and early warning protection device thereof | |
| CN202828666U (en) | Underground garbage cabin assembly of garbage transfer warehouse | |
| CN217380365U (en) | Rolling slats door in rubbish compression storehouse | |
| CN216446955U (en) | Colliery is air door system in pit | |
| CN218663892U (en) | Belt anti-tearing device | |
| CN216617363U (en) | Electric fireproof door device, fireproof door and comprehensive pipe rack | |
| CN205076322U (en) | It slowly falls portable intelligent garbage bin of function to have self -induction based on rotational speed | |
| CN217893981U (en) | Garbage discharging control equipment | |
| CN213876961U (en) | Process management device for separation of people and vehicles in storage yard | |
| CN218708455U (en) | Construction cage door capable of being opened and closed transversely | |
| CN207485284U (en) | Fire resistant doorsets monitoring system |
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 |