CN212510043U - Visual shutoff transition section of thick bamboo - Google Patents
Visual shutoff transition section of thick bamboo Download PDFInfo
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- CN212510043U CN212510043U CN202021248474.5U CN202021248474U CN212510043U CN 212510043 U CN212510043 U CN 212510043U CN 202021248474 U CN202021248474 U CN 202021248474U CN 212510043 U CN212510043 U CN 212510043U
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Abstract
The utility model discloses a visual plugging transition cylinder, which comprises a main cylinder body, a KF flange joint and a lens device, wherein the main cylinder body is used for connecting a plugging tool and an air extraction opening to be plugged; the KF flange joint comprises a first KF flange joint and a second KF flange joint provided with a valve. Through setting up the lens device, realized the observation to shutoff in-process end cap and extraction opening relative position, the person of facilitating the use adjusts the angle of entry of shutoff frock according to this, has avoidd the crooked problem of off-centre among the prior art, has improved the shutoff success rate, has avoided damaging the sealing washer. Meanwhile, a KF flange joint is reserved as a connecting position of the vacuum gauge pipe and the helium mass spectrometer leak detector, so that the requirements of vacuum degree and leakage rate of a vacuum interlayer are met.
Description
Technical Field
The utility model relates to a magnetic resonance technology field, more specifically say, relate to a visual shutoff transition section of thick bamboo.
Background
The magnetic resonance imaging equipment is widely applied to the field of clinical medicine, the core component of the magnetic resonance imaging equipment is a magnetic resonance imaging superconducting magnet, and the performance of the magnetic resonance superconducting magnet directly influences the imaging effect of the equipment.
The magnetic resonance superconducting magnet comprises a liquid helium container in the middle and a vacuum interlayer coated on the periphery, and the higher the vacuum degree of the vacuum interlayer is, the smaller the heat leakage of the superconducting magnet is, and the more beneficial the low temperature in the liquid helium container is maintained. In order to enable the vacuum interlayer to have higher vacuum degree, the vacuum interlayer is vacuumized through an air suction port on the vacuum interlayer, and then the air suction port is blocked.
In the prior art, the plugging tool confirms whether plugging is in place or not by depending on hand feeling, an air suction opening which is short in plugging path and small in plug is practical, but eccentric deflection is easy to occur between the air suction opening and the plug in the plugging process under the condition that the plug is large or the plugging path is long, the plugging difficulty is increased, meanwhile, a sealing ring is easy to damage, air is sucked reversely, the vacuum state of a superconducting magnet is further damaged, the vacuumizing operation needs to be carried out again, and a large amount of time is wasted.
In summary, how to avoid eccentric skew between the plug and the extraction opening in the plugging process is a problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a visual shutoff transition section of thick bamboo, the relative position of shutoff in-process end cap and extraction opening is observed to accessible lens device, has avoided the two to take place eccentric crooked, has improved the shutoff success rate.
In order to achieve the above object, the present invention provides the following technical solutions:
a visual plugging transition cylinder comprises a main cylinder body, a KF flange joint and a lens device, wherein the main cylinder body is used for connecting a plugging tool and an air extraction opening to be plugged;
the KF flange joint comprises a first KF flange joint and a second KF flange joint provided with a valve.
Preferably, the main cylinder body is provided with a straight round hole for installing the KF flange joint, and the straight round hole is connected with the KF flange joint in a sealing and welding manner.
Preferably, the main cylinder is provided with an inclined round hole for mounting the lens device, and the axis of the inclined round hole is not parallel to the axis of the main cylinder;
the inclined round hole is connected with the lens device in a sealing and welding mode.
Preferably, the lens device comprises a circular tube connected with the inclined circular hole, a lens mounting seat and a lens, the lens mounting seat is vertically connected to one end of the circular tube, which is far away from the main cylinder, and the lens is mounted in the lens mounting seat;
the circular tube is inserted into the inclined circular hole and is not higher than the inner surface of the main cylinder body.
Preferably, the lens mount pad include with first lens centre gripping flange that the pipe is connected and with first lens centre gripping flange cooperation is tight the second lens centre gripping flange of lens, first lens centre gripping flange with the two one end of second lens centre gripping flange all is equipped with the annular slot of installation gib head bolt, and the two other end all is equipped with the installation the lens mounting hole of lens.
Preferably, a first lens sealing groove for mounting a first sealing ring is arranged on the end surface of the first lens clamping flange, which is in contact with the lens, and the circle center of the first lens sealing groove is overlapped with the circle center of the lens mounting hole;
the second lens clamping flange is used for being provided with a second lens sealing groove for mounting a second sealing ring on the end face in contact with the lens, and the circle center of the second lens sealing groove is superposed with the circle center of the lens mounting hole.
Preferably, the main cylinder body is connected with the plugging tool through a first connecting flange, and a first annular groove for installing a hook bolt is formed in the end face, far away from the plugging tool, of the first connecting flange.
Preferably, the main cylinder is connected with the air pumping opening through a second connecting flange, and a second annular groove for mounting a hook bolt is formed in the end face, far away from the air pumping opening, of the second connecting flange.
The utility model provides a visual shutoff transition section of thick bamboo, including the main barrel body that is used for connecting shutoff frock and the extraction opening of treating the shutoff, the KF flange joint that is used for being connected with inspection instrument and vacuum pump and the lens device that is used for observing the shutoff process, KF flange joint and lens device all communicate with the main barrel body; the KF flange joint comprises a first KF flange joint and a second KF flange joint provided with a valve.
When plugging is carried out, firstly, two ends of the main cylinder body are respectively and hermetically connected with a plugging tool provided with a plug and an extraction opening to be plugged; connecting the first KF flange joint with a vacuum gauge pipe, connecting a valve of the second KF flange joint with a vacuum pump, performing vacuum pumping operation by using the vacuum pump after stable connection, closing the valve and dismantling the vacuum pump until the vacuum degree measured by the vacuum gauge pipe meets the requirement; connecting a helium mass spectrometer leak detector at the valve, opening the valve after assembly to check the leak rate, closing the valve after the leak rate is qualified, and removing the helium mass spectrometer leak detector; slowly pushing the plugging tool into the extraction opening, observing the relative position relation of the plugging tool and the extraction opening by using a lens device in the pushing process, and finely adjusting the entering angle of the plugging tool when the plugging tool deflects until the plugging tool pushes the plug to a preset matching position; and separating the plugging tool from the plug, and detaching the visual plugging transition cylinder to finish plugging operation.
The utility model discloses in, through setting up the lens device, realized the observation to shutoff in-process end cap and extraction opening relative position, the person of facilitating the use adjusts the entering angle of shutoff frock according to this, has avoidd the crooked problem of off-centre among the prior art, has improved the shutoff success rate, has avoided damaging the sealing washer.
Meanwhile, a KF flange joint is reserved as a connecting position of the vacuum gauge pipe and the helium mass spectrometer leak detector, so that the requirements of vacuum degree and leakage rate of a vacuum interlayer are met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic front view of a visual plugging transition cylinder according to an embodiment of the present invention;
FIG. 2 is a schematic top view of the visual plugging transition cartridge of FIG. 1;
FIG. 3 is a partial cross-sectional view in the left-hand direction of the visual occlusion transition cartridge of FIG. 1;
FIG. 4 is a schematic cross-sectional view in the direction A-A;
FIG. 5 is an assembly schematic view of the visual plugging transition cylinder in FIG. 1 after being connected with the extraction opening and the plugging tool;
fig. 6 is a schematic cross-sectional view in the direction B-B of fig. 5.
In fig. 1-6:
the lens device comprises a main cylinder body 1, a first connecting flange 11, a second connecting flange 12, a straight round hole 13, an inclined round hole 14, a KF flange joint 2, a lens device 3, a round pipe 31, a first lens clamping flange 32, a lens 33, a second lens clamping flange 34, an annular groove 35, a lens mounting hole 36, an air suction hole 4, a plugging tool 5 and a plug 6.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The core of the utility model is to provide a visual shutoff transition section of thick bamboo, the relative position of shutoff in-process end cap and extraction opening is observed to accessible lens device, has avoided the two to take place eccentric crooked, has improved the shutoff success rate.
Referring to fig. 1-6, fig. 1 is a schematic front view of a visual plugging transition cylinder according to an embodiment of the present invention; FIG. 2 is a schematic top view of the visual plugging transition cartridge of FIG. 1; FIG. 3 is a partial cross-sectional view in the left-hand direction of the visual occlusion transition cartridge of FIG. 1; FIG. 4 is a schematic cross-sectional view in the direction A-A; FIG. 5 is an assembly schematic view of the visual plugging transition cylinder in FIG. 1 after being connected with the extraction opening and the plugging tool; fig. 6 is a schematic sectional view in the front view direction of fig. 5.
The utility model provides a visual shutoff transition section of thick bamboo, including the main barrel 1 that is used for connecting shutoff frock 5 and the extraction opening 4 of treating the shutoff, the KF flange joint 2 that is used for being connected with inspection instrument and vacuum pump and the lens device 3 that is used for observing the shutoff process, KF flange joint 2 and lens device 3 all communicate with main barrel 1; the KF flange joint 2 comprises a first KF flange joint and a second KF flange joint provided with a valve.
Referring to fig. 5, two ends of the main cylinder 1 are respectively connected to the plugging tool 5 and the air extraction opening 4 to be plugged, so that the plugging tool 5 and the air extraction opening 4 are positioned, and the axial displacement or the axial displacement of the two during plugging is avoided. In addition, main cylinder 1 still provides the installation space of vacuum pump and detecting instrument among the evacuation process.
Preferably, the main cylinder 1 may be connected to the plugging tool 5 through a first connecting flange 11, and a first annular groove for installing a hook bolt is provided on an end surface of the first connecting flange 11 away from the plugging tool 5. During assembly, the plugging disc of the plugging tool 5 is in contact with the first connecting flange 11 and is connected with the first connecting flange 11 through the hook head bolt.
Preferably, the main cylinder 1 may be connected to the air pumping port 4 through a second connecting flange 12, and a second annular groove for installing a hook bolt is provided on an end surface of the second connecting flange 12 away from the air pumping port 4. During assembly, the mounting flange of the extraction opening 4 is in contact with the second connecting flange 12 and is connected with the mounting flange and the second connecting flange 12 through hook bolts.
The shape of the main cylinder 1 may be a cylinder as shown in fig. 3, or a circular truncated cone, or may be any other geometric shape as long as the requirement that both ends of the main cylinder can be connected with the plugging tool 5 and the extraction opening 4 is satisfied.
The KF flange joint 2 is used for installing inspection instruments such as a vacuum gauge pipe and a helium mass spectrometer leak detector and a vacuum pump so as to ensure the leakage rate and the vacuum degree in the plugging process.
Considering the problem of disassembling the vacuum pump, the KF flange joint 2 comprises a first flange joint and a second KF flange joint provided with a valve so as to avoid the exchange of gas between the main cylinder 1 and the outside in the process of disassembling and assembling the vacuum pump.
The type and specification of the valve can be determined according to a vacuum pump and a helium mass spectrometer leak detector used in actual production, preferably, a right-angle valve can be selected as the valve at the joint of the second KF flange, and the valve is simple in structure and low in production cost.
The lens device 3 is used for observing the relative position of the plug 6 and the extraction opening 4 in the plugging process, so that the pushing angle of the plugging tool 5 is correspondingly adjusted, and the situation that the plug 6 cannot enter the extraction opening 4 or the plug 6 damages a sealing ring is avoided.
Preferably, the lens device 3 can be disposed on the wall surface of the main cylinder 1 to facilitate the observation of the plugging process.
When plugging is carried out, firstly, two ends of a main cylinder body 1 are respectively and hermetically connected with a plugging tool 5 provided with a plug 6 and an air extraction opening 4 to be plugged; connecting the first KF flange joint with a vacuum gauge pipe, connecting a valve of the second KF flange joint with a vacuum pump, performing vacuum pumping operation by using the vacuum pump after stable connection, closing the valve and dismantling the vacuum pump until the vacuum degree measured by the vacuum gauge pipe meets the requirement; connecting a helium mass spectrometer leak detector at the valve, opening the valve after assembly to check the leak rate, closing the valve after the leak rate is qualified, and removing the helium mass spectrometer leak detector; slowly pushing the plugging tool 5 into the air extraction opening 4, observing the relative position relationship of the plugging tool 5 and the air extraction opening by using the lens device 3 in the pushing process, and finely adjusting the entering angle of the plugging tool 5 when the plugging tool 5 deflects until the plugging tool 5 pushes the plug 6 to a preset matching position; and separating the plugging tool 5 from the plug 6, and disassembling the visual plugging transition cylinder to finish plugging operation.
In this embodiment, through setting up lens device 3, realized the observation to the relative position of end cap 6 and extraction opening 4 in the shutoff process, convenience of customers adjusts the entering angle of shutoff frock 5 according to this, has avoided the crooked problem of off-centre among the prior art, has improved the shutoff success rate, has avoided damaging the sealing washer.
Meanwhile, a KF flange joint 2 is reserved as a connecting position of the vacuum gauge and the helium mass spectrometer leak detector, so that the requirements on vacuum degree and leak rate are met.
Preferably, the main cylinder body 1 is provided with a straight round hole 13 for installing the KF flange joint 2, and the straight round hole 13 is connected with the KF flange joint 2 in a sealing and welding manner.
The one end that the KF flange connects 2 is the standard flange, the other end be with the outer circumference complex arc surface of main barrel 1, the interior circle that the KF flange connects 2 is concentric with the straight round hole 13 on the main barrel 1 to KF flange connects 2 and the sealed welded connection of straight round hole 13.
Considering the installation requirements of the vacuum pump and the vacuum gauge, at least two straight circular holes 13 are provided on the main cylinder 1, preferably, referring to fig. 1 and fig. 2, the circle centers of the two straight circular holes 13 can be arranged at the 1/2 length of the main cylinder 1, so that the obstruction of the inspection instrument and the vacuum pump to the observation of the plugging process is reduced, sufficient installation space is provided for the inspection instrument and the vacuum pump, and the disassembly and assembly operation is convenient.
Certainly, KF flange joint 2 and main barrel 1 also can be integrative structure, reduces the processing assembly flow.
Preferably, the main cylinder 1 may be provided with an inclined circular hole 14 for mounting the lens device 3, and an axis of the inclined circular hole 14 is not parallel to an axis of the main cylinder 1; the inclined circular hole 14 is connected with the lens device 3 in a sealing welding mode.
To facilitate observation and monitoring of the plugging process, preferably, referring to fig. 1 and 2, an inclined circular hole 14 may be formed at one end of the outer surface of the main cylinder 1 near the pumping port 4.
Preferably, in consideration of a certain difference in deflection degree at different directions during plugging, the main cylinder 1 is provided with at least two inclined circular holes 14, and the axes of the two inclined circular holes and the axis of the main cylinder 1 have the same inclination angle.
On the basis of the above embodiment, the structure of the lens device 3 is defined, the lens device 3 includes a circular tube 31 connected to the inclined circular hole 14, a lens mounting seat connected to the circular tube 31, and a lens 33, the lens mounting seat is vertically connected to one end of the circular tube 31 away from the main cylinder 1, and the lens 33 is mounted in the lens mounting seat; the round tube 31 is inserted into the inclined round hole 14 and the round tube 31 is not higher than the inner surface of the main cylinder 1.
The circular tube 31 is a hollow cylinder and is used for connecting the lens mount and the main cylinder 1. In order to avoid that the welding seam is higher than the inner surface of the main cylinder 1 to influence the entering of the plug 6 or scratch the sealing ring, the round pipe 31 is arranged not to be higher than the inner surface of the main cylinder 1.
In consideration of the requirement of light transmittance, the lens 33 may be a colorless transparent lens made of common glass or organic glass.
Preferably, the lens 33 is formed in a cylindrical shape to facilitate the manufacturing of the lens mount, in view of facilitating the mounting of the lens 33.
On the basis of the above embodiment, the structure of the lens mounting base is limited, the lens mounting base includes a first lens clamping flange 32 connected with the circular tube 31 and a second lens clamping flange 34 matched with the first lens clamping flange 32 to clamp the lens 33, one end of each of the first lens clamping flange 32 and the second lens clamping flange 34 is provided with an annular groove 35 for mounting a hook bolt, and the other end of each of the first lens clamping flange and the second lens clamping flange is provided with a lens mounting hole 36 for mounting the lens 33.
The inner diameter of the lens mounting hole 36 is the same as the outer diameter of the lens 33, and the depth of the lens mounting hole 36 is less than 1/2 of the thickness of the lens 33.
When the lens is installed, the lens 33 is installed in the lens installation hole 36 of the first lens clamping flange 32; aligning the lens mounting hole 36 of the second lens holding flange 34 with the lens 33, and fitting the lens 33 into the lens mounting hole 36 of the first lens holding flange 32; the first lens retaining flange 32 and the second lens retaining flange 34 are bolted together using hook bolts.
Preferably, a first lens sealing groove for installing a first sealing ring is arranged on the end surface of the first lens clamping flange 32, which is in contact with the lens 33, and the circle center of the first lens sealing groove coincides with the circle center of the lens installation hole 36; the end face of the second lens clamping flange 34, which is used for contacting with the lens 33, is provided with a second lens sealing groove for mounting a second sealing ring, and the circle center of the second lens sealing groove coincides with the circle center of the lens mounting hole 36.
The number of the first lens sealing grooves may be one circle, may be two circles as shown in fig. 4, and may be multiple circles according to actual production needs.
The number of the second lens sealing grooves may be one circle, may be two circles as shown in fig. 4, and may be multiple circles according to actual production needs.
Preferably, the first lens sealing groove and the second lens sealing groove are symmetrically arranged about the lens 33.
Considering that the transition plugging barrel is used for plugging the pumping hole of the vacuum interlayer of the superconducting magnet, the first sealing ring and the second sealing ring are both made of fluororubber sealing rings, so that the superconducting magnet has good cold resistance and is not easy to harden and crack.
Preferably, the main cylinder 1, the KF flange joint 2, the circular tube 31 and the lens mount may be made of stainless steel 304 or other weldable non-magnetic materials.
It should be noted that the first and second connection flanges 11 and 12, the first and second annular grooves, the first and second KF flange joints, the first and second lens clamping flanges 32 and 34, the first and second seal rings, and the first and second lens seal grooves mentioned in this document are only used to distinguish the difference in position, and do not contain any restriction on the order.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
It is right above that the utility model provides a visual shutoff transition section of thick bamboo has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (8)
1. A visual plugging transition cylinder is characterized by comprising a main cylinder body (1) for connecting a plugging tool (5) and an air suction port (4) to be plugged, a KF flange joint (2) for connecting a checking instrument and a vacuum pump, and a lens device (3) for observing a plugging process, wherein the KF flange joint (2) and the lens device (3) are both communicated with the main cylinder body (1);
KF flange joint (2) includes first KF flange joint and is equipped with the second KF flange joint of valve.
2. The visual plugging transition cylinder according to claim 1, wherein a straight round hole (13) for installing the KF flange joint (2) is arranged on the main cylinder body (1), and the straight round hole (13) is connected with the KF flange joint (2) in a sealing and welding manner.
3. Visual occlusion transition cylinder according to claim 1, characterized in that the main cylinder (1) is provided with a slanted circular hole (14) for mounting the lens means (3), the axis of the slanted circular hole (14) being non-parallel to the axis of the main cylinder (1);
the inclined round hole (14) is connected with the lens device (3) in a sealing and welding mode.
4. The visual occlusion transition cylinder of claim 3, characterized in that the lens device (3) comprises a circular tube (31) connected with the inclined circular hole (14), a lens mounting seat and a lens (33), the lens mounting seat is vertically connected with one end of the circular tube (31) far away from the main cylinder body (1), and the lens (33) is mounted in the lens mounting seat;
the round pipe (31) is inserted into the inclined round hole (14) and the round pipe (31) is not higher than the inner surface of the main cylinder body (1).
5. The visual occlusion transition cylinder of claim 4, wherein the lens mounting seat comprises a first lens clamping flange (32) connected with the circular tube (31) and a second lens clamping flange (34) matched with the first lens clamping flange (32) to clamp the lens (33), one end of each of the first lens clamping flange (32) and the second lens clamping flange (34) is provided with an annular groove (35) for mounting a hook bolt, and the other end of each of the first lens clamping flange and the second lens clamping flange is provided with a lens mounting hole (36) for mounting the lens (33).
6. The visual plugging transition cylinder of claim 5, wherein the end surface of the first lens clamping flange (32) for contacting the lens (33) is provided with a first lens sealing groove for mounting a first sealing ring, and the center of the first lens sealing groove coincides with the center of the lens mounting hole (36);
the second lens clamping flange (34) is used for being provided with a second lens sealing groove for mounting a second sealing ring on the end face contacted with the lens (33), and the circle center of the second lens sealing groove is superposed with the circle center of the lens mounting hole (36).
7. The visual plugging transition cylinder according to any one of claims 1 to 6, wherein the main cylinder body (1) is connected with the plugging tool (5) through a first connecting flange (11), and a first annular groove for installing a hook bolt is arranged on the end face, away from the plugging tool (5), of the first connecting flange (11).
8. The visual plugging transition cylinder according to any one of claims 1 to 6, wherein the main cylinder body (1) is connected with the pumping port (4) through a second connecting flange (12), and a second annular groove for installing a hook bolt is arranged on the end face, away from the pumping port (4), of the second connecting flange (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021248474.5U CN212510043U (en) | 2020-06-30 | 2020-06-30 | Visual shutoff transition section of thick bamboo |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021248474.5U CN212510043U (en) | 2020-06-30 | 2020-06-30 | Visual shutoff transition section of thick bamboo |
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| CN212510043U true CN212510043U (en) | 2021-02-09 |
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| CN202021248474.5U Active CN212510043U (en) | 2020-06-30 | 2020-06-30 | Visual shutoff transition section of thick bamboo |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113083381A (en) * | 2021-05-13 | 2021-07-09 | 之江实验室 | Large vacuum system |
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2020
- 2020-06-30 CN CN202021248474.5U patent/CN212510043U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113083381A (en) * | 2021-05-13 | 2021-07-09 | 之江实验室 | Large vacuum system |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A visual plugging transition tube Effective date of registration: 20210615 Granted publication date: 20210209 Pledgee: Weifang rural commercial bank Limited by Share Ltd. hi tech sub branch Pledgor: WEIFANG XINLI SUPERCONDUCTING MAGNET TECHNOLOGY Co.,Ltd. Registration number: Y2021980004794 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220628 Granted publication date: 20210209 Pledgee: Weifang rural commercial bank Limited by Share Ltd. hi tech sub branch Pledgor: WEIFANG XINLI SUPERCONDUCTING MAGNET TECHNOLOGY Co.,Ltd. Registration number: Y2021980004794 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |