CN220243055U - Seat unlocking device - Google Patents
Seat unlocking device Download PDFInfo
- Publication number
- CN220243055U CN220243055U CN202321742894.2U CN202321742894U CN220243055U CN 220243055 U CN220243055 U CN 220243055U CN 202321742894 U CN202321742894 U CN 202321742894U CN 220243055 U CN220243055 U CN 220243055U
- Authority
- CN
- China
- Prior art keywords
- unlocking
- seat
- support plate
- rotating shaft
- cushion
- 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
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
Landscapes
- Seats For Vehicles (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
The utility model discloses a seat unlocking device, which relates to the technical field of seat unlocking and comprises a backrest framework assembly for supporting and fixing a seat cushion, and also comprises a cushion framework assembly for supporting and fixing the seat cushion, wherein the backrest framework assembly is rotationally connected with the cushion framework assembly, one side of the seat cushion is provided with a locking device for controlling the folding state of the seat cushion, the locking device is rotationally connected with the backrest framework assembly, and the backrest framework assembly and the cushion framework assembly are both provided with positioning devices which are in clamping fit with the locking device. Through setting up rotatable locking means, and the joint cooperation between locking means and back skeleton assembly and the cushion skeleton assembly, realize folding and the locking that resets between seat back and the seat cushion through rotating locking means, this seat unlocking device simple structure, low cost, easy dismounting, can effectively realize the folding function of seat back.
Description
Technical Field
The utility model relates to the technical field of seat unlocking, in particular to a seat unlocking device.
Background
Along with the development of automobile industry, the automobile popularity rate is improved, the requirements of people on various convenience of automobiles are higher and higher, the automobile interior trim is attractive and practical, and when large-size articles are transported, in order to enlarge the internal use space of the automobile, the backrest of a single-row seat without people is required to be folded and laid down, and when people take the single-row seat, the backrest of the seat is required to be reset, locked and fixed.
The folding locking device of the single-row seat in the current market has the problems of complex manufacturing and assembling, poor structural stability, high manufacturing cost and the like caused by more parts.
Disclosure of Invention
The utility model aims to provide a seat unlocking device which is used for solving the problems of complex structure, multiple parts, complex assembly, poor stability and high cost of a single-row seat folding locking device.
In order to achieve the above purpose, the utility model provides a seat unlocking device, which comprises a backrest framework assembly for supporting and fixing a seat backrest, and also comprises a cushion framework assembly for supporting and fixing a seat cushion, wherein the backrest framework assembly is rotationally connected with the cushion framework assembly, one side of the seat backrest is provided with a locking device for controlling the folding state of the seat backrest, the locking device is rotationally connected with the backrest framework assembly, and the backrest framework assembly and the cushion framework assembly are respectively provided with a positioning device which is in clamping fit with the locking device.
The seat back folding and locking device is characterized in that the backrest framework assembly and the cushion framework assembly are rotationally connected, and the locking device rotationally connected with the backrest framework assembly is arranged to control the folding and locking fixing states of the seat back. When the backrest of the automobile seat needs to be folded, the locking device is rotated, so that the locking device is separated from the positioning device on the seat cushion framework assembly, and the backrest of the seat is placed over the seat cushion; when the seat back needs to be restored, the seat back is rotated away from the seat cushion until the normal locking and fixing position is reached, and the locking device is reversely rotated so that the locking device is clamped and fixed with the positioning device on the cushion framework assembly, and the locking and fixing of the seat back are realized.
In a preferred implementation manner of the seat unlocking device, the locking device comprises an unlocking support plate, the lower part of the unlocking support plate is provided with a lower limit groove with an opening facing the seat cushion, the upper part of the unlocking support plate is provided with an upper limit groove with the opposite opening direction of the lower limit groove, the positioning device comprises an upper limit pin matched and clamped with the upper limit groove and a lower limit pin matched and clamped with the lower limit groove, the upper limit pin is fixedly connected with the backrest skeleton assembly, and the lower limit pin is fixedly connected with the seat cushion skeleton assembly.
The unlocking support plate is rotatably connected with the backrest framework assembly, meanwhile, an upper limit groove is formed in the upper portion of the unlocking support plate so as to realize clamping fit with an upper limit pin arranged on the backrest framework assembly, a lower limit groove is formed in the lower portion of the unlocking support plate so as to realize clamping fit with a lower limit pin arranged on the seat framework assembly, and the lower limit groove and the lower limit pin are separated from a clamping state through rotation of the unlocking support plate, so that the seat backrest is rotatably and folded and placed on a seat cushion; the unlocking support plate is rotated in the opposite direction, and the lower limit groove is clamped and fixed with the lower limit pin, so that the backrest of the seat is restored to the normal use state.
In a preferred implementation manner of the seat unlocking device, the unlocking support plate is rotatably connected with the backrest frame assembly through an unlocking rotating shaft, and the unlocking rotating shaft is arranged between the upper limit groove and the lower limit groove.
The unlocking rotating shaft is arranged on the backrest framework assembly to realize the rotating connection between the unlocking support plate and the backrest framework assembly. The unlocking rotating shaft is arranged between the upper limit groove and the lower limit groove, and the opening directions of the upper limit groove and the opening directions of the lower limit groove are opposite, so that when the backrest seat is locked and fixed, the stress on the two sides of the unlocking support plate is balanced, and the backrest of the seat is more stable.
In a preferred implementation manner of the seat unlocking device, the unlocking support plate is provided with a rotation limiting hole in rotation fit with the unlocking rotating shaft, one end of the unlocking rotating shaft is fixedly connected with the backrest frame assembly, and the other end of the unlocking rotating shaft is provided with a limiting device for preventing the unlocking support plate from being separated from the unlocking rotating shaft.
Through set up rotation spacing hole and unblock pivot normal running fit on the unblock extension board, in order to prevent simultaneously that the unblock extension board from coming off from the unblock pivot, set up prevent the unblock extension board breaks away from the stop device of unblock pivot, guarantee locking means's use steady reliability.
In a preferred implementation manner of the seat unlocking device, the limiting device comprises a baffle plate, wherein the baffle plate is fixedly connected with one end, far away from the backrest frame assembly, of the unlocking rotating shaft, and the outer diameter of the baffle plate is larger than the inner diameter of the rotation limiting hole.
Through setting up stop device into the baffle, and the external diameter of baffle is greater than the internal diameter that rotates spacing hole, prevents that the unblock extension board from coming off from the unblock pivot in the use, guarantee locking means's stability of use.
In a preferred implementation manner of the seat unlocking device, the limiting device comprises a nut, an external thread matched with the nut is arranged at one end, far away from the backrest frame assembly, of the unlocking rotating shaft, the nut is connected with the unlocking rotating shaft through threads, and the outer diameter of the nut is larger than the inner diameter of the rotation limiting hole.
Through setting up stop device into the nut, set up simultaneously in the unblock pivot with nut complex external screw thread, set up the external diameter of nut to be greater than the internal diameter that rotates spacing hole, make things convenient for locking device's equipment and dismantlement when preventing that the unblock extension board from coming off from the unblock pivot.
In a preferred implementation manner of the seat unlocking device, the locking device further comprises an unlocking handle driving the unlocking support plate to rotate around the unlocking rotating shaft, and the unlocking handle is fixedly connected with the top of the unlocking support plate.
Through setting up the unblock handle just the unblock handle with the top fixed connection of unblock extension board makes things convenient for the operator to rotate locking means, and the realization that is more convenient is to the folding of seat back and the regulation of locking fixed state.
In a preferred embodiment of the seat unlocking device, the unlocking handle is provided with an anti-slip sleeve or an anti-slip thread.
Through be equipped with antiskid cover or anti-skidding line on the unblock handle and increase operator's hand and the frictional force on unblock handle surface, the hand slides when preventing that the operator from rotating locking device, improves the precision and the stability of operation, promotes the use experience of seat.
In a preferred implementation manner of the seat unlocking device, a torsion spring is arranged between the backrest framework assembly and the unlocking support plate, the torsion spring comprises two force arms, a clamping hook is arranged at the end part of one force arm, the clamping hook is clamped with the upper limiting pin, and the other force arm is fixedly connected with the unlocking support plate.
Through be equipped with the torsional spring between back skeleton assembly with the unblock extension board realizes the automatic resilience reset of locking means, and one arm of force and the last spacer pin joint of torsional spring, another arm of force and unblock extension board fixed connection, when rotating locking means, the torsional spring produces a resilience force opposite with the rotation direction, and after the operator hand left the unblock handle of locking means, locking means was automatic reset under torsional spring resilience force.
In a preferred implementation of the seat unlocking device, the backrest frame assembly and the seat cushion frame assembly are rotatably connected through a backrest folding rotating shaft.
The backrest folding rotating shaft is arranged to realize the rotating connection between the backrest framework assembly and the cushion framework assembly, so that the rotating folding function of the backrest is realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:
FIG. 1 is a schematic view showing a locked and fixed state of a seat back according to an embodiment of the present utility model;
FIG. 2 is a schematic view showing a folded state of a seat back according to an embodiment of the present utility model;
fig. 3 is a schematic structural view of a locking device according to an embodiment of the present utility model.
Reference numerals illustrate:
1. a seat back; 2. a seat cushion; 3. a back frame assembly; 4. a seat cushion frame assembly; 5. the locking device comprises a locking device, a locking handle, a locking support plate, a rotation limiting hole, a lower limiting groove, an upper limiting groove and a torsion spring, wherein the locking device comprises a locking handle, a locking support plate, a rotation limiting hole, a rotation limiting groove, a lower limiting groove, an upper limiting groove and a torsion spring, and the upper limiting groove is formed in the lower limiting groove; 6. a backrest folding rotating shaft; 7. an upper limit pin; 8. unlocking the rotating shaft; 9. and a lower limit pin.
Detailed Description
In order to more clearly illustrate the general inventive concept, reference will be made in the following detailed description, by way of example, to the accompanying drawings.
It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced in other ways than as described herein, and therefore the scope of the present utility model is not limited by the specific embodiments disclosed below.
The description as it relates to "first", "second", etc. in the present utility model is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.
As shown in fig. 1-3, the utility model provides a seat unlocking device, which comprises a backrest framework assembly 3 for supporting and fixing a seat backrest 1, and a seat cushion framework assembly 4 for supporting and fixing a seat cushion 2, wherein the backrest framework assembly 3 is rotatably connected with the seat cushion framework assembly 4, one side of the seat backrest 1 is provided with a locking device 5 for controlling the folding state of the seat backrest 1, the locking device 5 is rotatably connected with the backrest framework assembly 3, and the backrest framework assembly 3 and the seat cushion framework assembly 4 are respectively provided with a positioning device in clamping fit with the locking device 5.
The seat back 1 is controlled to be folded and locked and fixed through the locking device 5 which is rotationally connected with the backrest framework assembly 3 and the seat cushion framework assembly 4. When the automobile seat back 1 needs to be folded, the locking device 5 is rotated, so that the locking device 5 is separated from the positioning device on the cushion framework assembly 4, and the seat back 1 is placed over the cushion; when the seat back 1 needs to be restored, the seat back 1 is rotated away from the seat cushion 2 until reaching a normal locking fixed position, and the locking device 5 is reversely rotated so that the locking device 5 is clamped and fixed with the positioning device on the cushion framework assembly 4, and the locking fixation of the seat back 1 is realized.
In a preferred implementation manner of the seat unlocking device, the locking device 5 comprises an unlocking support plate 52, a lower limit groove 54 with an opening facing the seat cushion 2 is arranged at the lower part of the unlocking support plate 52, an upper limit groove 55 opposite to the opening direction of the lower limit groove 54 is arranged at the upper part of the unlocking support plate 52, the positioning device comprises an upper limit pin 7 matched and clamped with the upper limit groove 55 and a lower limit pin 9 matched and clamped with the lower limit groove 54, the upper limit pin 7 is fixedly connected with the backrest frame assembly 3, and the lower limit pin 9 is fixedly connected with the seat cushion frame assembly 4.
The unlocking support plate 52 is arranged in the locking device 5, the unlocking support plate 52 is rotationally connected with the backrest frame assembly 3, meanwhile, an upper limit groove 55 is formed in the upper portion of the unlocking support plate 52 to realize clamping fit with an upper limit pin 7 arranged on the backrest frame assembly 3, a lower limit groove 54 is formed in the lower portion of the unlocking support plate 52 to realize clamping fit with a lower limit pin 9 arranged on the cushion frame assembly 4, and the lower limit groove 54 and the lower limit pin 9 are separated from a clamping state through rotation of the unlocking support plate 52, so that the seat backrest 1 is rotationally folded and placed on the seat cushion 2; the unlocking support plate 52 is rotated in the opposite direction, and the lower limit groove 54 is clamped and fixed with the lower limit pin 9, so that the seat back 1 is restored to the normal use state.
In a preferred implementation manner of the seat unlocking device, the unlocking support plate 52 is rotatably connected with the backrest frame assembly 3 through an unlocking rotating shaft 8, and the unlocking rotating shaft 8 is arranged between the upper limit groove 55 and the lower limit groove 54.
The unlocking rotary shaft 8 is arranged on the backrest framework assembly 3 to realize the rotary connection between the unlocking support plate 52 and the backrest framework assembly 3. The unlocking rotating shaft 8 is arranged between the upper limit groove 55 and the lower limit groove 54, and the opening directions of the upper limit groove 55 and the lower limit groove 54 are opposite, so that when the backrest seat is locked and fixed, the two sides of the unlocking support plate 52 are stressed, and the stress is balanced, so that the backrest 1 is more stable.
In a preferred implementation manner of the seat unlocking device, the unlocking support plate 52 is provided with a rotation limiting hole 53 in rotation fit with the unlocking rotating shaft 8, one end of the unlocking rotating shaft 8 is fixedly connected with the backrest frame assembly 3, and the other end of the unlocking rotating shaft 8 is provided with a limiting device for preventing the unlocking support plate 52 from being separated from the unlocking rotating shaft 8.
Through set up rotation spacing hole 53 and unlocking pivot 8 normal running fit on unlocking extension board 52, in order to prevent simultaneously that unlocking extension board 52 from coming off from unlocking pivot 8, set up prevent unlocking extension board 52 breaks away from unlocking pivot 8's stop device, guarantee locking device 5's use stable reliability.
It should be noted that, the specific structure of the limiting device is not limited in the present application, and may be any one of the following embodiments:
embodiment one:
the limiting device comprises a baffle, the baffle is fixedly connected with one end, far away from the backrest framework assembly 3, of the unlocking rotating shaft 8, and the outer diameter of the baffle is larger than the inner diameter of the rotating limiting hole 53.
Through setting up stop device as the baffle, and the external diameter of baffle is greater than the internal diameter that rotates spacing hole 53, prevents that unblock extension board 52 from coming off from unblock pivot 8 in the use, guarantee locking device 5 stability of using.
Embodiment two:
the limiting device comprises a nut, one end, far away from the backrest frame assembly 3, of the unlocking rotating shaft 8 is provided with external threads matched with the nut, the nut is connected with the unlocking rotating shaft 8 through threads, and the outer diameter of the nut is larger than the inner diameter of the rotation limiting hole 53.
Through setting up stop device to the nut, set up simultaneously on unlocking pivot 8 with nut complex external screw thread, set up the external diameter of nut to be greater than the internal diameter that rotates spacing hole 53, make things convenient for the equipment and the dismantlement of locking device 5 when preventing unlocking extension board 52 from coming off from unlocking pivot 8.
In a preferred implementation manner of the seat unlocking device, the locking device 5 further includes an unlocking handle 51 that drives the unlocking support plate 52 to rotate around the unlocking rotation shaft 8, and the unlocking handle 51 is fixedly connected with the top of the unlocking support plate 52.
Through setting up unblock handle 51 just unblock handle 51 with the top fixed connection of unblock extension board 52 makes things convenient for the operator to rotate locking device 5, and the realization that is more convenient is to the folding of seat back 1 and the regulation of locking fixed state.
In a preferred implementation of the seat unlocking device, the unlocking handle 51 is provided with an anti-slip sleeve or anti-slip pattern.
Through be equipped with antiskid cover or anti-skidding line on unblock handle 51 and increase operator's hand and the frictional force on unblock handle 51 surface, the hand is smooth when preventing that the operator from rotating locking device 5, improves the precision and the stability of operation, promotes the use experience of seat.
In a preferred implementation manner of the seat unlocking device, a torsion spring 56 is disposed between the backrest frame assembly 3 and the unlocking support plate 52, the torsion spring 56 includes two arms, one of the arms is provided with a hook at its end, the hook is engaged with the upper limit pin 7, and the other arm is fixedly connected with the unlocking support plate 52.
Through be equipped with torsional spring 56 between backrest skeleton assembly 3 with the unblock extension board 52, realize the automatic resilience reset of locking device 5, the arm of force and the last spacer pin 7 joint of torsional spring 56, another arm of force and unblock extension board 52 fixed connection, when rotating locking device 5, torsional spring 56 produces a resilience force opposite with the rotation direction, and after the operator's hand left unlocking handle 51 of locking device 5, locking device 5 was automatic reset under torsional spring 56 resilience force.
In a preferred embodiment of the seat unlocking device, the backrest frame assembly 3 and the seat cushion frame assembly 4 are rotatably connected by a backrest folding shaft 6.
The backrest folding rotating shaft 6 is arranged to realize the rotating connection between the backrest framework assembly 3 and the cushion framework assembly 4, so that the rotating folding function of the seat backrest 1 is realized.
The technical solution protected by the present utility model is not limited to the above embodiments, and it should be noted that, the combination of the technical solution of any one embodiment with the technical solution of the other embodiment or embodiments is within the scope of the present utility model. While the utility model has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the utility model and are intended to be within the scope of the utility model as claimed.
Claims (10)
1. The utility model provides a seat unlocking device, its characterized in that, including the back skeleton assembly that is used for supporting and fixing the seat back, still including the cushion skeleton assembly that is used for supporting and fixing the seat cushion, the back skeleton assembly with the cushion skeleton assembly rotates to be connected, one side of seat back is equipped with and is used for controlling the folding locking means with the locking state of seat back, locking means with the back skeleton assembly rotates to be connected, the back skeleton assembly with cushion skeleton assembly all be equipped with locking means joint complex positioner.
2. The seat unlocking device according to claim 1, wherein the locking device comprises an unlocking support plate, a lower limit groove with an opening facing the seat cushion is formed in the lower portion of the unlocking support plate, an upper limit groove opposite to the opening direction of the lower limit groove is formed in the upper portion of the unlocking support plate, the positioning device comprises an upper limit pin matched and clamped with the upper limit groove and a lower limit pin matched and clamped with the lower limit groove, the upper limit pin is fixedly connected with the backrest frame assembly, and the lower limit pin is fixedly connected with the seat cushion frame assembly.
3. The seat unlocking device according to claim 2, wherein the unlocking support plate is rotatably connected with the backrest frame assembly through an unlocking rotating shaft, and the unlocking rotating shaft is arranged between the upper limit groove and the lower limit groove.
4. A seat unlocking device according to claim 3, wherein the unlocking support plate is provided with a rotation limiting hole in rotation fit with the unlocking rotating shaft, one end of the unlocking rotating shaft is fixedly connected with the backrest frame assembly, and the other end of the unlocking rotating shaft is provided with a limiting device for preventing the unlocking support plate from being separated from the unlocking rotating shaft.
5. The seat unlocking device according to claim 4, wherein the limiting device comprises a baffle plate fixedly connected with one end of the unlocking rotating shaft away from the backrest frame assembly, and the outer diameter of the baffle plate is larger than the inner diameter of the rotation limiting hole.
6. The seat unlocking device according to claim 4, wherein the limiting device comprises a nut, an external thread matched with the nut is arranged at one end of the unlocking rotating shaft away from the backrest frame assembly, the nut is connected with the unlocking rotating shaft through threads, and the outer diameter of the nut is larger than the inner diameter of the rotation limiting hole.
7. A seat unlocking device according to claim 3, wherein the locking device further comprises an unlocking handle which drives the unlocking support plate to rotate around the unlocking rotating shaft, and the unlocking handle is fixedly connected with the top of the unlocking support plate.
8. The seat unlocking device according to claim 7, wherein the unlocking handle is provided with an anti-slip sleeve or an anti-slip pattern.
9. The seat unlocking device according to claim 4, wherein a torsion spring is arranged between the backrest frame assembly and the unlocking support plate, the torsion spring comprises two force arms, a clamping hook is arranged at the end part of one force arm, the clamping hook is clamped with the upper limiting pin, and the other force arm is fixedly connected with the unlocking support plate.
10. The seat release mechanism of claim 1 wherein the back frame assembly is rotatably coupled to the seat cushion frame assembly by a back fold pivot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321742894.2U CN220243055U (en) | 2023-07-05 | 2023-07-05 | Seat unlocking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321742894.2U CN220243055U (en) | 2023-07-05 | 2023-07-05 | Seat unlocking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220243055U true CN220243055U (en) | 2023-12-26 |
Family
ID=89263822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321742894.2U Active CN220243055U (en) | 2023-07-05 | 2023-07-05 | Seat unlocking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220243055U (en) |
-
2023
- 2023-07-05 CN CN202321742894.2U patent/CN220243055U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3720314B2 (en) | Retractable grip handle and coat hook | |
| WO2002053409A1 (en) | Powered fold-flat seat hinge assembly | |
| CN220243055U (en) | Seat unlocking device | |
| CN210822081U (en) | Vehicle-mounted folding mobile phone support | |
| CN209208647U (en) | Electronic device stand | |
| CN212298322U (en) | Vehicle-mounted connecting device, vehicle-mounted fixing equipment and vehicle-mounted support | |
| CN218316515U (en) | Automobile air outlet fixing seat and mobile phone support | |
| CN112677855B (en) | Multifunctional vehicle-mounted support and vehicle | |
| CN207579663U (en) | For the side handrail structure with turning-over support plate of automotive seat | |
| CN108860422B (en) | Folding mechanism convenient to control and electric vehicle | |
| CN217981969U (en) | Multiplying power mirror mounting bracket | |
| CN219573121U (en) | Beam assembly and calibration equipment | |
| CN214707787U (en) | Cell phone stand supporting seat | |
| CN216424277U (en) | Support integrated on automobile body and vehicle | |
| CN108382275A (en) | Automotive seat convenient seating system | |
| CN221111567U (en) | Assembly mechanism of foldable multi-joint mechanical arm | |
| CN220594807U (en) | Vehicle-mounted mobile phone support, instrument board and vehicle | |
| JP4077962B2 (en) | Support structure for vehicle seat | |
| CN210454534U (en) | Rotary seat turntable and automobile rotary seat | |
| CN210310694U (en) | Bicycle with stable structure | |
| CN215128943U (en) | Rotating device for medical equipment and couplant heater | |
| CN217672438U (en) | A clamping device for automobile air outlet | |
| CN208360278U (en) | steering column adjusting device | |
| CN221585226U (en) | Two-way unlocking folding headrest locking mechanism | |
| CN218198019U (en) | Folding seat for cab |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |