CN217470829U - Movable and changeable roof greening device for primary and secondary schools - Google Patents

Movable and changeable roof greening device for primary and secondary schools Download PDF

Info

Publication number
CN217470829U
CN217470829U CN202220973886.8U CN202220973886U CN217470829U CN 217470829 U CN217470829 U CN 217470829U CN 202220973886 U CN202220973886 U CN 202220973886U CN 217470829 U CN217470829 U CN 217470829U
Authority
CN
China
Prior art keywords
connecting rod
sliding
movable
primary
roof greening
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
CN202220973886.8U
Other languages
Chinese (zh)
Inventor
李牧江
陈荣杰
王潜
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.)
Xiamen Zhongjian Northeast Designing Institute Co ltd
Original Assignee
Xiamen Zhongjian Northeast Designing Institute 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 Xiamen Zhongjian Northeast Designing Institute Co ltd filed Critical Xiamen Zhongjian Northeast Designing Institute Co ltd
Priority to CN202220973886.8U priority Critical patent/CN217470829U/en
Application granted granted Critical
Publication of CN217470829U publication Critical patent/CN217470829U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B80/00Architectural or constructional elements improving the thermal performance of buildings
    • Y02B80/32Roof garden systems

Landscapes

  • Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)

Abstract

The application discloses a movable and changeable roof greening device for primary and secondary schools, which relates to the technical field of roof greening and comprises a connecting assembly, planting pots and a sliding mechanism, wherein the connecting assembly comprises two connecting strips which are arranged in parallel at intervals; the glide machanism includes two slide rails and the slip subassembly that are parallel to each other, and the vertical setting of slide rail is on the parapet, and the one end and the slide rail of slip subassembly slide and be connected, and the one end that the slide rail was kept away from to the slip subassembly rotates with the one end of connecting the strip piece to be connected, and the connecting strip piece rotates round the relative slip subassembly of horizontal axis, and the one end that the slip subassembly was kept away from to the connecting strip piece sets up in the subaerial of people's roofing, and still is provided with the mounting that is used for fixed slip subassembly on the slide rail. This application has the effect that improves afforestation equipment's suitability.

Description

Movable and changeable roof greening device for primary and secondary schools
Technical Field
The application relates to the technical field of roof greening, in particular to a movable and changeable roof greening device for primary and secondary schools.
Background
The roof of building generally is the roofing of going to the people in the school of middle and small schools, and the parapet of the roofing of going to the people is highly not less than 1.2m, in addition waterproof insulation layer etc. for the total height of wall body reaches 1.5m and is higher even, accords with the high requirement of wall body safety protection, consequently, the place that the student moved also can be regarded as to the roofing of going to the people, and the accessible is put green plant and is come to decorate the roofing of going to the people, weakens the uncomfortable sense of high student of top of the building, and green plant is planted in afforestation equipment usually.
Chinese patent publication No. CN214338851U discloses a roof greening device, which comprises a planting box with a trapezoidal section, four sets of support legs are connected to the bottom of the planting box, a first planting groove is arranged on a transverse plate at the top of the planting box, and a second planting groove, a third planting groove and a fourth planting groove are arranged on an inclined plate at the top of the planting box.
Aiming at the related technologies, green plants are planted in the first planting groove, the second planting groove, the third planting groove and the fourth planting groove which are obliquely arranged, so that the planar space of the accessible roof is effectively converted, the activity space of the accessible roof is expanded, and the effect of improving the utilization rate of the accessible roof space is realized; however, the occupied space of the greening device on the roof of the user is fixed, and the occupied space of the greening device cannot be adjusted according to the space requirement of student activities, so that the defect of poor applicability is considered by the inventor.
SUMMERY OF THE UTILITY MODEL
In order to improve afforestation equipment's suitability, this application provides the middle and primary school's roof afforestation equipment of portable transform.
The application provides a middle and primary school's roof greening device of portable transform adopts following technical scheme:
a movable and changeable roof greening device for primary and secondary schools comprises a connecting assembly, planting pots and a sliding mechanism, wherein the connecting assembly comprises two connecting strips which are arranged in parallel at intervals, the planting pots are arranged at intervals along the length direction of the connecting strips, and two sides of each planting pot are respectively connected with one opposite side of the two connecting strips; the glide machanism includes two slide rails and the slip subassembly that are parallel to each other, the vertical setting of slide rail is on the parapet, the one end and the slide rail of slip subassembly slide and are connected, the one end that the slide rail was kept away from to the slip subassembly rotates with the one end of connecting the strip piece, the connecting strip piece rotates round the relative slip subassembly of horizontal axis, the one end that the slip subassembly was kept away from to the connecting strip piece sets up on the bottom surface of last people's roofing, just still be provided with the mounting that is used for fixed slip subassembly on the slide rail.
Through adopting above-mentioned technical scheme, glide machanism installs on the parapet, and the connecting strip piece slides through the slip subassembly and installs on the slide rail, changes the position of connecting strip piece one end in vertical side through removing the slip subassembly, and then realizes the change to planting the basin position, fixes the slip subassembly through the mounting after that and realizes the fixed to the connecting strip piece for can adjust afforestation equipment's occupation space according to student's activity space's needs, realize improving the effect of afforestation equipment suitability.
Preferably, the slide rail comprises a bottom plate and side plates positioned on two sides of the bottom plate, one surface of the bottom plate is attached to and fixedly connected with the parapet wall, the two side plates are parallel to each other and perpendicular to the bottom plate, and sliding grooves extending along the vertical direction are formed in the side plates; the sliding assembly comprises a first connecting rod, two first connecting pieces and sliding pieces, the first connecting rod is rotatably connected with the connecting strip blocks, the two first connecting pieces are arranged at two ends of the first connecting rod, the sliding pieces are arranged on one sides, away from the first connecting rod, of the first connecting pieces, the axis of the first connecting rod is parallel to the rotating axis of the connecting strip blocks, the two sliding pieces are respectively arranged in two sliding grooves in the same sliding rail, and the fixing pieces are used for fixing the positions of the sliding pieces in the sliding grooves.
Through adopting above-mentioned technical scheme, the slide rail passes through bottom plate and parapet fixed connection, and the one end of connecting the piece is connected with the slip subassembly rotation through the first connecting rod, and the first connecting rod passes through first connecting piece and slides piece fixed connection, slides the spout on piece and the curb plate and slides and be connected the slip that realizes slip subassembly and slide rail and be connected, and then realizes connecting the piece and be connected with sliding of parapet.
Preferably, the mounting is including setting up the lead screw in fixed block and the vertical setting of curb plate upper end, the one end of lead screw is worn to establish the upper end of fixed block, curb plate in proper order and the piece that slides is connected with the lower extreme of curb plate, just lead screw and fixed block spiro union.
By adopting the technical scheme, the position of the sliding piece on the sliding groove is fixed through the screw rod and the fixing block, and when the position of the connecting bar block is adjusted, the screw rod is rotated to drive the sliding piece to move along the vertical direction, so that the position of the connecting bar block can be adjusted conveniently.
Preferably, the first connecting piece comprises two first mounting strips, one end of each first mounting strip is fixedly connected with one end of each first connecting rod, and one end of each first mounting strip, which is far away from each first connecting rod, is fixedly connected with the upper side and the lower side of the sliding sheet respectively.
By adopting the technical scheme, the two first mounting bars and the sliding sheet form a stable triangular structure, and the effect of improving the stability of the mounting structure of the sliding sheet and the connecting bar block can be realized.
Preferably, the connecting bar block is provided with a mounting ring along the length direction in a surrounding manner, the upper and lower surfaces of the connecting bar block are fixedly connected with the inner surface of the mounting ring, and the first connecting rod penetrates through one side of the mounting ring close to the sliding mechanism.
Through adopting above-mentioned technical scheme, the collar is established on the connecting strip piece, and the rotation that enough collar was worn to establish by the head rod is realized being connected with the connecting strip piece by the one end of establishing.
Preferably, the two sides of the planting pot are respectively connected with one opposite side of the two connecting strip blocks through screws, the planting pot rotates around the connecting strip blocks in the direction perpendicular to the length direction of the connecting strip blocks, and the width of the mounting ring is larger than that of the connecting strip blocks.
Through adopting above-mentioned technical scheme, plant the basin and pass through the screw realization rotation and be connected with coupling assembling, at the in-process that connecting strip piece position changed, plant the basin and take place to rotate relative connecting strip piece under the effect of gravity, and then make and plant the basin and keep the horizontality, realize the practical effect of the afforestation equipment of being convenient for.
Preferably, the one end that the collar kept away from the head rod is provided with the second connecting rod, the second connecting rod is worn to establish the collar and is parallel with the head rod, be provided with the second connecting piece on the both ends of second connecting rod, the second connecting piece is kept away from one of second connecting rod and is served and be provided with the removal shallow, two the second connecting piece respectively with the both sides fixed connection who removes the shallow, be provided with the gyro wheel on the lower surface of removal shallow.
Through adopting above-mentioned technical scheme, keep away from glide machanism at the connecting strip piece and serve and install the removal shallow, the connecting strip piece passes through the second connecting rod and the second connecting piece realizes being connected with the rotation of removal shallow, and installs the gyro wheel on the lower surface of removal shallow, reduces the connecting strip piece in the position change process with the frictional force on people's roofing ground, be convenient for to the change of connecting strip piece position.
Preferably, a brake pad is arranged on the roller.
Through adopting above-mentioned technical scheme, install the brake block on the gyro wheel, structural stability when can improve afforestation equipment fixed realizes the effect of the afforestation equipment use of being convenient for.
Preferably, the bottom of the planting pot is provided with a drain hole.
Through adopting above-mentioned technical scheme, the wash port has been seted up at the bottom of planting the basin for can in time discharge the ponding in planting the basin, realize the effect that the afforestation equipment of being convenient for used.
In summary, the present application includes at least one of the following beneficial technical effects:
(1) the effect of improving the applicability of the greening device is realized by arranging the mutual matching of the connecting assembly, the planting pot, the sliding mechanism and the fixing piece;
(2) the screw rod and the fixing block are matched with each other, so that the effects of adjusting the sliding sheet conveniently and fixing the position of the sliding sheet are achieved;
(3) through setting up mutually supporting of second connecting rod, second connecting piece, removal shallow, gyro wheel and brake block, the green effect of planting the device use of being convenient for is realized.
Drawings
FIG. 1 is a schematic view of a greening apparatus according to the present embodiment in a use state;
FIG. 2 is a schematic view of another status of the greening apparatus according to this embodiment;
FIG. 3 is an enlarged schematic view of a portion A of FIG. 1;
fig. 4 is an enlarged schematic view of a portion B of fig. 1.
Reference numerals: 1. a connection assembly; 2. planting pots; 3. a sliding mechanism; 31. a slide rail; 311. a base plate; 312. a side plate; 32. a sliding assembly; 321. a first connecting rod; 322. a first connecting member; 323. a sliding sheet; 4. a fixing member; 41. a fixed block; 42. a screw rod; 5. a drain hole; 6. connecting the bar blocks; 7. a mounting ring; 8. a chute; 9. a first mounting bar; 10. a knob; 11. a second connecting rod; 12. a second connecting member; 13. moving the cart; 14. a second mounting bar; 15. a roller; 16. a brake pad.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses portable primary and secondary school's roof greening device that changes. Referring to fig. 1 and 2, the greening device comprises a connecting assembly 1, planting pots 2, a sliding mechanism 3 and a fixing member 4, wherein the sliding mechanism 3 is installed on a parapet wall, one end of the connecting assembly 1 is connected with the sliding mechanism 3 in a sliding manner, the other end of the connecting assembly is placed on the ground of an upper roof, the planting pots 2 are distributed at intervals along the length direction of the connecting assembly 1, and water drainage holes 5 are formed in the bottoms of the planting pots 2; move coupling assembling 1's one end and then change coupling assembling 1's position through glide machanism 3, realize the change to planting 2 positions of basin for can be according to student's activity space's needs, the occupation space of adjustment afforestation equipment realizes improving the effect of afforestation equipment suitability.
The connecting assembly 1 comprises two connecting strips 6 which are parallel and distributed at intervals, the planting pot 2 is a cuboid, one side of the planting pot is provided with an opening, the opening of the planting pot 2 is vertical and upward, two end faces of the planting pot 2 are respectively attached to the opposite sides of the two connecting strips 6, the planting pot 2 is rotatably connected with the connecting strips 6 through screws, and the rotating axis of the planting pot 2 is vertical to the length direction of the connecting strips 6; the connecting bar block 6 is provided with a mounting ring 7 along the length direction in a surrounding way, the upper surface and the lower surface of the connecting bar block 6 are welded with the inner surface of the mounting ring 7, and the width of the connecting bar block 6 is larger than that of the connecting bar block 6.
Referring to fig. 3, the sliding mechanism 3 includes mutually parallel sliding rails 31 and sliding assemblies 32, wherein the two sliding rails 31 are vertically installed on the parapet wall and have a distance; the slide rail 31 comprises a bottom plate 311 and side plates 312 positioned at two sides of the bottom plate 311, one surface of the bottom plate 311 is attached to the parapet wall and fixedly connected through screws, the side plates 312 are perpendicular to the bottom plate 311, one side of the side plates 312 is integrally connected with one side of the bottom plate 311, and the side plates 312 are provided with slide grooves 8 extending along the vertical direction; the sliding assembly 32 comprises a first connecting rod 321, two first connecting pieces 322 installed at two ends of the first connecting rod 321, and a sliding sheet 323 installed at one end of the first connecting piece 322 far from the first connecting rod 321, the first connecting rod 321 penetrates through one side of the installation ring 7 close to the sliding mechanism 3, and the connecting bar block 6 can rotate around the axis of the first connecting rod 321; the first connecting member 322 includes two first mounting bars 9, one end of each of the two first mounting bars 9 is fixedly connected to one end of the first connecting rod 321, one end of each of the two first mounting bars 9, which is far away from the first connecting rod 321, is fixedly connected to the upper side and the lower side of the sliding piece 323, the two first mounting bars 9 and the sliding piece 323 form a triangular structure, and the two sliding pieces 323 are slidably mounted in the two sliding grooves 8 of the same sliding rail 31.
Referring to fig. 1 and 3, the fixing member 4 includes a fixing block 41 welded to an upper end of the side plate 312 and a screw rod 42 vertically installed on the side plate 312, a lower end of the screw rod 42 sequentially penetrates through the fixing block 41, an upper end of the side plate 312 and a sliding sheet 323 and is connected to a lower end of the side plate 312, the screw rod 42 is screwed to the sliding sheet 323, and a knob 10 facilitating rotation of the screw rod 42 is installed on an upper end of the screw rod 42.
Referring to fig. 4, a second connecting rod 11 is inserted through one end of the mounting ring 7 away from the first connecting rod 321, the connecting bar block 6 can rotate around the axis of the second connecting rod 11, and the second connecting rod 11 is parallel to the first connecting rod 321; a second connecting piece 12 is arranged at two ends of the second connecting rod 11, and a movable trolley 13 is arranged at one end of the second connecting piece 12 far away from the second connecting rod 11; the second connecting piece 12 comprises two second mounting bars 14, one ends of the two second mounting bars 14 are fixedly connected with one end of the second connecting rod 11, one side of the second mounting bar 14, which is far away from the second connecting rod 11, is fixedly connected with one side of the moving cart 13, a roller 15 is mounted on the lower surface of the moving cart 13, and a brake pad 16 for braking is arranged on the roller 15.
The implementation principle of the movable and changeable roof greening device for primary and secondary schools in the embodiment of the application is as follows: the brake pad 16 on the roller 15 is loosened, the knob 10 on the screw rod 42 is rotated to drive the screw rod 42 to rotate, so that the screw rod 42 drives the sliding sheet 323 to move in the chute 8 along the vertical direction, and further drives one end of the connecting bar block 6 to move, the gradient of the connecting bar block 6 is changed, the adjustment of the size of the occupied space of the greening device is realized, the greening device is adjusted according to the requirement of the student activity space, and the effect of improving the applicability of the greening device is realized; plant basin 2 and connect the strip piece 6 and rotate the connection for plant basin 2 can keep the horizontality at connecting strip piece 6 pivoted in-process, and remove the frictional force that shallow 13 can people received at the in-process that adjusts connecting strip piece 6, realize the effect of the afforestation equipment use of being convenient for.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. The movable roof greening device for the middle and primary schools is characterized by comprising a connecting assembly (1), planting pots (2) and a sliding mechanism (3), wherein the connecting assembly (1) comprises two connecting strip blocks (6) which are arranged in parallel at intervals, the planting pots (2) are arranged at intervals along the length direction of the connecting strip blocks (6), and two sides of each planting pot (2) are respectively connected with one opposite side of the two connecting strip blocks (6); glide machanism (3) include two slide rail (31) and slip subassembly (32) that are parallel to each other, the vertical setting of slide rail (31) is on the parapet, the one end and the slide rail (31) of slip subassembly (32) slide and are connected, the one end that slide rail (31) were kept away from in slip subassembly (32) is rotated with the one end of connecting strip piece (6) and is connected, connecting strip piece (6) rotate round horizontal axis relative slip subassembly (32), the one end that slip subassembly (32) were kept away from in connecting strip piece (6) sets up in the subaerial of people's roofing, just still be provided with mounting (4) that are used for fixed slip subassembly (32) on slide rail (31).
2. A movable and changeable roof greening device for primary and secondary schools according to claim 1, wherein the sliding rail (31) comprises a bottom plate (311) and side plates (312) positioned at two sides of the bottom plate (311), one surface of the bottom plate (311) is attached to and fixedly connected with a parapet, the two side plates (312) are parallel to each other and perpendicular to the bottom plate (311), and sliding grooves (8) extending along the vertical direction are formed in the side plates (312); the sliding assembly (32) comprises a first connecting rod (321) rotatably connected with the connecting strip block (6), two first connecting pieces (322) arranged at two ends of the first connecting rod (321) and sliding pieces (323) arranged on one side, far away from the first connecting rod (321), of the first connecting piece (322), wherein the axis of the first connecting rod (321) is parallel to the rotating axis of the connecting strip block (6), the sliding pieces (323) are respectively arranged in two sliding grooves (8) on the same sliding rail (31), and the fixing piece (4) is used for fixing the positions of the sliding pieces (323) in the sliding grooves (8).
3. The movable and changeable roof greening device for primary and secondary schools as claimed in claim 2, wherein the fixing member (4) comprises a fixing block (41) arranged at the upper end of the side plate (312) and a vertically arranged screw rod (42), the lower end of the screw rod (42) penetrates through the fixing block (41), the upper end of the side plate (312) and the sliding sheet (323) in sequence to be connected with the lower end of the side plate (312), and the screw rod (42) is in threaded connection with the sliding sheet (323).
4. A movable and changeable roof greening device for primary and secondary schools according to claim 3, wherein the first connecting member (322) comprises two first mounting bars (9), one end of each of the two first mounting bars (9) is fixedly connected with one end of the first connecting rod (321), and one end of each of the two first mounting bars (9) far away from the first connecting rod (321) is fixedly connected with the upper side and the lower side of the sliding sheet (323).
5. A movable and changeable roof greening device for primary and secondary schools according to claim 4, wherein a mounting ring (7) is arranged around the connecting bar block (6) along the length direction, the upper surface and the lower surface of the connecting bar block (6) are fixedly connected with the inner surface of the mounting ring (7), and the first connecting rod (321) penetrates through one side, close to the sliding mechanism (3), of the mounting ring (7).
6. A movable and changeable roof greening device for primary and secondary schools according to claim 5, wherein two sides of the planting pot (2) are fixedly connected with one side, opposite to the two connecting blocks (6), through screws, the planting pot (2) rotates relative to the connecting blocks (6) around a direction perpendicular to the length direction of the connecting blocks (6), and the width of the mounting ring (7) is larger than that of the connecting blocks (6).
7. The movable and changeable roof greening device for primary and secondary schools according to claim 6, wherein a second connecting rod (11) is arranged at one end, away from the first connecting rod (321), of the mounting ring (7), the second connecting rod (11) penetrates through the mounting ring (7) and is parallel to the first connecting rod (321), second connecting pieces (12) are arranged at two ends of the second connecting rod (11), a movable cart (13) is arranged at one end, away from the second connecting rod (11), of the second connecting piece (12), the two second connecting pieces (12) are fixedly connected with two sides of the movable cart (13), and rollers (15) are arranged on the lower surface of the movable cart (13).
8. A mobile and changeable roof greening device for primary and secondary schools according to claim 7, wherein a brake pad (16) is arranged on the roller (15).
9. A movable and changeable roof greening device for primary and secondary schools according to claim 8, wherein a water drainage hole (5) is formed in the bottom of the planting pot (2).
CN202220973886.8U 2022-04-26 2022-04-26 Movable and changeable roof greening device for primary and secondary schools Active CN217470829U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202220973886.8U CN217470829U (en) 2022-04-26 2022-04-26 Movable and changeable roof greening device for primary and secondary schools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220973886.8U CN217470829U (en) 2022-04-26 2022-04-26 Movable and changeable roof greening device for primary and secondary schools

Publications (1)

Publication Number Publication Date
CN217470829U true CN217470829U (en) 2022-09-23

Family

ID=83308892

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202220973886.8U Active CN217470829U (en) 2022-04-26 2022-04-26 Movable and changeable roof greening device for primary and secondary schools

Country Status (1)

Country Link
CN (1) CN217470829U (en)

Similar Documents

Publication Publication Date Title
CN212065133U (en) Ornamental trees and shrubs support mount
CN217470829U (en) Movable and changeable roof greening device for primary and secondary schools
CN209983257U (en) Rainwater garden for public green land
CN211523473U (en) Landscape corridor frame structure for garden design
CN214062284U (en) Portable working platform with adjustable height
CN211795366U (en) Landscape show shelf
CN212289911U (en) Afforestation flowerpot transport means
CN202907519U (en) Greening screen
CN217843267U (en) Supporting table of drainage equipment for temporary drainage
CN221152318U (en) Greening maintenance watering device
CN112586952A (en) Landscape design is with green cultivation device of planting
CN216454145U (en) Drawing paper flattening device for landscape design
CN214699479U (en) Open-air drainage pipe supporting seat
CN218246636U (en) Decorative flower stand for architectural design
CN221399753U (en) But height-adjusting's scaffold
CN209905470U (en) Energy-concerving and environment-protective building pipe fitting rack for civil engineering
CN220898396U (en) Flower stand convenient for cutting leaves
CN218125409U (en) Greening maintenance facility suitable for side slope
CN213046333U (en) Novel vertical greening landscape design device
CN221000492U (en) Concrete pavement pouring template fixing device
CN213206074U (en) Water pump fixing device for sewage treatment
CN215107994U (en) Rail guard is used in gardens construction
CN212866782U (en) Building engineering management integrated operation platform
CN220694038U (en) Cultivation ware of adjustable area
CN216254177U (en) Pergola structure based on view design

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant