CN219669665U - Paper tube supporting device - Google Patents

Paper tube supporting device Download PDF

Info

Publication number
CN219669665U
CN219669665U CN202321138685.7U CN202321138685U CN219669665U CN 219669665 U CN219669665 U CN 219669665U CN 202321138685 U CN202321138685 U CN 202321138685U CN 219669665 U CN219669665 U CN 219669665U
Authority
CN
China
Prior art keywords
supporting
arm
frame
paper tube
shaft
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
CN202321138685.7U
Other languages
Chinese (zh)
Inventor
罗亚洪
罗雄伟
罗万全
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.)
Zhaoqing Dinghu Liansheng Paper Packaging Co ltd
Original Assignee
Zhaoqing Dinghu Liansheng Paper Packaging 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 Zhaoqing Dinghu Liansheng Paper Packaging Co ltd filed Critical Zhaoqing Dinghu Liansheng Paper Packaging Co ltd
Priority to CN202321138685.7U priority Critical patent/CN219669665U/en
Application granted granted Critical
Publication of CN219669665U publication Critical patent/CN219669665U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W90/00Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
    • Y02W90/10Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

Abstract

The utility model discloses a paper tube supporting device, which comprises a first supporting mechanism and a second supporting mechanism, wherein the first supporting mechanism comprises a frame and two supporting frames, the top of each supporting frame is provided with a limiting part, the limiting parts are used for limiting a first shaft to move along the horizontal direction, and the tops of the limiting parts are arranged in an open mode; the second supporting mechanism comprises two supporting arms, the top of each supporting arm is provided with a limiting groove for accommodating the end part of the first shaft, the top of each limiting groove is opened, the bottom of each supporting arm is provided with a swing arm, the middle part of each swing arm is hinged to the frame, one end of each swing arm is hinged to the bottom of each supporting arm, a first cylinder is further arranged on the frame and comprises a cylinder body and a telescopic rod, the cylinder body is hinged to the frame, the telescopic rod is hinged to one end of each swing arm, which is far away from each supporting arm, the first cylinder is used for driving the swing arm to swing, the swing arms swing to drive the supporting arms to lift, and the supporting arms are lifted to lift paper cylinders on the supporting frames. The paper tube supporting device can reduce the time for replacing the paper tube and improve the efficiency.

Description

Paper tube supporting device
Technical Field
The utility model relates to the technical field of cement bag production equipment, in particular to a paper tube supporting device.
Background
The cement bag is also called as a cement packaging bag, the bag making material of the cement bag comprises paper, generally, the paper used for the paper bag is a paper cylinder for roll-shaped packaging, and the paper on the paper cylinder is subjected to bag making processing after unreeling.
Generally, the weight of the paper tube is relatively large, the paper tube needs to be hung on a supporting device by using a crane, a first shaft is arranged in the center of the paper tube, and the supporting device supports the first shaft to support the unreeling of the paper tube.
In production, the existing supporting device usually waits for the original paper tube to be used, then stops to remove the used paper tube, then uses a crane to hoist a new paper tube to the supporting device, and then restarts the machine to continue production.
However, the existing supporting device is long in time consumption and low in efficiency when the paper cylinder is replaced.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the paper tube supporting device which can reduce the time for replacing the paper tube and improve the efficiency.
According to a first aspect of the present utility model, a paper tube supporting device includes: the first supporting mechanism comprises a frame and two supporting frames arranged on the frame, wherein the two supporting frames are respectively used for supporting two ends of a first shaft of the paper tube, the top of each supporting frame is provided with a limiting part, the limiting parts are used for limiting the first shaft to move along the horizontal direction, and the tops of the limiting parts are opened; the second supporting mechanism comprises two supporting arms, the two supporting arms are respectively used for supporting two ends of a first shaft of the paper tube, a limiting groove used for accommodating the end part of the first shaft is formed in the top of each supporting arm, the top of each limiting groove is opened, a swing arm is arranged at the bottom of each supporting arm, the middle of each swing arm is hinged to the frame, one end of each swing arm is hinged to the bottom of each supporting arm, a first air cylinder is further arranged on the frame and comprises a cylinder body and a telescopic rod, the cylinder body is hinged to the frame, the telescopic rod is hinged to one end of each swing arm, which is far away from the corresponding supporting arm, the first air cylinder is used for driving the corresponding swing arm to swing, the swing arm swings to drive the corresponding supporting arm to lift, and the supporting arms are lifted to support the paper tube on the supporting frame.
The paper tube supporting device provided by the embodiment of the utility model has at least the following beneficial effects:
1. according to the utility model, the first supporting mechanism is arranged, and comprises the frame and two supporting frames arranged on the frame, wherein the two supporting frames are respectively used for supporting the two ends of the first shaft of the paper tube, so that the first supporting mechanism can support unreeling of the paper tube.
2. According to the utility model, the limiting part is arranged at the top of the supporting frame and used for limiting the first shaft to move along the horizontal direction, so that the paper tube is more stable on the supporting frame, and the paper tube is prevented from shaking back and forth when unreeling.
3. According to the utility model, the top of the limiting part is opened, so that the first shaft of the paper tube can enter and exit the limiting part from the top of the limiting part, and the paper tube can be conveniently replaced on the limiting part.
4. According to the utility model, the second supporting mechanism is arranged and comprises two supporting arms which are respectively used for supporting the two ends of the first shaft of the paper tube, so that the second supporting mechanism can support the paper tube to be unreeled, and therefore, the first supporting mechanism and the second supporting mechanism can support the two paper tubes simultaneously in a matched manner, when one paper tube of the first supporting mechanism and the second supporting mechanism is used up, a crane can be submitted to be used for placing a new paper tube in the other one of the first supporting mechanism and the second supporting mechanism for standby, and further, the time for replacing the paper tube is reduced, and the efficiency is improved.
5. According to the utility model, the limiting groove for accommodating the end part of the first shaft is formed in the top end of the supporting arm, so that the paper tube is more stable on the supporting arm, and the paper tube is prevented from shaking back and forth when unreeling.
6. According to the utility model, the top of the limit groove is opened, so that the first shaft of the paper tube can enter and exit the limit groove from the top of the limit groove, and the paper tube can be conveniently replaced on the limit groove.
7. According to the utility model, the swing arm is arranged at the bottom of the supporting arm, the middle part of the swing arm is hinged with the frame, one end of the swing arm is hinged with the bottom of the supporting arm, the frame is also provided with the first cylinder, the first cylinder comprises the cylinder body and the telescopic rod, the cylinder body is hinged with the frame, the telescopic rod is hinged with one end of the swing arm far away from the supporting arm, the first cylinder is used for driving the swing arm to swing, the swing arm swings to drive the swing arm to swing when the paper tube on the supporting arm is used up, the swing arm drives the supporting arm to lift, so that the supporting arm can support the paper tube on the supporting arm, and then the swing arm drives the paper tube to keep away from the supporting arm and then continuously support the paper tube for unreeling, so that the supporting arm can replace a new paper tube under the condition without stopping, and after the paper tube on the supporting arm is used up, the supporting arm can reset through swinging, so that the supporting arm does not need to occupy space, and the utilization rate of space is improved.
According to some embodiments of the utility model, the bottom of the limit groove is concave arc.
According to some embodiments of the utility model, a second shaft is arranged at the hinge center of the swing arm and the frame, an extension part is arranged at the bottom of the bracket arm, the extension part extends in a direction away from the hinge center of the bracket arm and the swing arm, and the extension part abuts against the second shaft to limit the downward swing angle of the bracket arm.
According to some embodiments of the utility model, a limiting seat is arranged on the frame, and the limiting seat is abutted with the supporting arm to limit the upward swinging angle of the supporting arm.
According to some embodiments of the utility model, the swing arm includes a first arm body, a second arm body, and a third shaft connecting one end of the first arm body and one end of the second arm body, the bracket is disposed between the first arm body and the second arm body, and the bracket is rotatably connected with the third shaft.
According to some embodiments of the utility model, the limiting part comprises a first bearing and a second bearing which are arranged in parallel, the first bearing is rotatably connected with the supporting frame, the second bearing is rotatably connected with the supporting frame, and the first bearing and the second bearing are matched and support the end part of the first shaft.
According to some embodiments of the utility model, at least two first bearings are provided, two first bearings are coaxially provided, and at least two second bearings are provided correspondingly.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic structural view of a paper tube supporting device according to an embodiment of the present utility model;
fig. 2 is a schematic structural view of the paper tube supporting device shown in fig. 1 in a state in which the supporting arm swings downward;
fig. 3 is a cross-sectional view A-A shown in fig. 1.
Reference numerals: 100-rack, 110-support frame, 120-limit part, 130-bracket arm, 140-limit groove, 150-swing arm, 160-first cylinder, 170-cylinder, 180-telescopic link, 190-second shaft, 200-extension part, 210-limit seat, 220-first arm body, 230-second arm body, 240-third shaft, 250-first bearing, 260-second bearing.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
A paper tube supporting device according to an embodiment of the present utility model is described below with reference to the accompanying drawings.
Referring to fig. 1, 2 and 3, a paper tube supporting device according to an embodiment of the present utility model includes a first supporting mechanism and a second supporting mechanism.
For the first supporting mechanism, the first supporting mechanism comprises a frame 100 and two supporting frames 110 arranged on the frame 100, wherein the two supporting frames 110 are respectively used for supporting two ends of a first shaft of the paper tube, so that the first supporting mechanism can support unreeling of the paper tube.
In some specific embodiments, the top of the supporting frame 110 is provided with a limiting portion 120, and the limiting portion 120 is used for limiting the first shaft to move along the horizontal direction, so that the paper tube is more stable on the supporting frame 110, and the paper tube is prevented from shaking back and forth when unreeling.
Further, the top of the limiting portion 120 is opened, so that the first shaft of the paper tube can enter and exit the limiting portion 120 from the top of the limiting portion 120, and the paper tube can be replaced on the limiting portion 120 conveniently.
Specifically, the limiting portion 120 includes a first bearing 250 and a second bearing 260 disposed in parallel, the first bearing 250 is rotationally connected with the support frame 110, the second bearing 260 is rotationally connected with the support frame 110, and the first bearing 250 and the second bearing 260 support an end portion of the first shaft in a matching manner, so that when the first shaft rotates, a friction resistance between the first shaft and the first bearing 250 and a friction resistance between the second bearing 260 are rolling friction resistances, and further, a resistance of the limiting portion 120 to the first shaft is reduced.
Further, at least two first bearings 250 are provided, and two first bearings 250 are coaxially provided, and at least two second bearings 260 are correspondingly provided, so that the first shaft is supported by the limiting portion 120 more stably.
In some embodiments, the top of the support frame 110 is provided with two supports, on which the shaft is provided, and the first bearing 250 and the second bearing 260 are rotatably connected to the shafts on the two supports, respectively.
For the second supporting mechanism, the second supporting mechanism includes two supporting arms 130, and two supporting arms 130 are used for supporting the both ends of the first axle of fiber container respectively for the second supporting mechanism can support the fiber container and unreel, thereby, first supporting mechanism and second supporting mechanism cooperation can support two fiber containers simultaneously, can submit to use the crane to place new fiber container in another one of first supporting mechanism and second supporting mechanism when the fiber container of one of first supporting mechanism and second supporting mechanism will use up promptly, and then, reduce the time of changing the fiber container, raise the efficiency.
In some specific embodiments, the top end of the bracket arm 130 is provided with a limiting groove 140 for accommodating the end of the first shaft, so that the paper tube is more stable on the bracket arm 130, and the paper tube is prevented from shaking back and forth when unreeling.
Further, the top of the limit groove 140 is opened, so that the first shaft of the paper tube can enter and exit the limit groove 140 from the top of the limit groove 140, and the paper tube can be replaced on the limit groove 140 conveniently.
In some specific embodiments, the groove bottom of the limiting groove 140 is concave arc, so that the groove bottom of the limiting groove 140 can be attached to the bottom of the first shaft, and further, shaking of the first shaft when the first shaft rotates on the limiting groove 140 is reduced.
In some specific embodiments, the bottom of the supporting arm 130 is provided with a swing arm 150, the middle part of the swing arm 150 is hinged with the frame 100, one end of the swing arm 150 is hinged with the bottom of the supporting arm 130, the frame 100 is further provided with a first cylinder 160, the first cylinder 160 comprises a cylinder 170 and a telescopic rod 180, the cylinder 170 is hinged with the frame 100, the telescopic rod 180 is hinged with one end of the swing arm 150 away from the supporting arm 130, the first cylinder 160 is used for driving the swing arm 150 to swing, the swing arm 150 swings to drive the supporting arm 130 to lift, and the supporting arm 130 is lifted to lift the paper tube on the supporting frame 110.
It can be appreciated that when the paper tube on the support frame 110 is about to be used, the swing arm 150 is driven to swing through the first air cylinder 160, so that the swing arm 150 drives the supporting arm 130 to rise, so that the supporting arm 130 can support the paper tube on the support frame 110, so that the paper tube on the support frame 110 can be transferred onto the supporting arm 130, and then the swing arm 130 is used, so that the swing arm 150 drives the paper tube to keep away from the support frame 110 and then continuously support the paper tube for unreeling, so that the support frame 110 can be used for replacing a new paper tube under the condition of not stopping, and after the paper tube on the supporting arm 130 is used, the supporting arm 130 can be reset through swing, so that the supporting arm 130 does not need to continuously occupy space, and further, the space utilization rate is improved.
It should be explained that, when the swing arm 150 swings up and down, the position of the hinge center of the first cylinder 160 and the swing arm 150 along the horizontal direction will change, in this embodiment, by hinging the cylinder 170 with the frame 100, the telescopic rod 180 is hinged with one end of the swing arm 150 away from the bracket 130, so that when the first cylinder 160 swings the swing arm 150, the first cylinder 160 can swing along the hinge center of the cylinder 170 and the frame 100, so that the first cylinder 160 can compensate the position change of the hinge center of the first cylinder 160 and the swing arm 150 along the horizontal direction through swinging, thereby avoiding the first cylinder 160 from being locked with the swing arm 150.
In some specific embodiments, the hinge center of the swing arm 150 and the frame 100 is provided with a second shaft 190, the bottom of the bracket arm 130 is provided with an extension part 200, the extension part 200 extends in a direction away from the hinge center of the bracket arm 130 and the swing arm 150, and the extension part 200 abuts against the second shaft 190 to limit the downward swing angle of the bracket arm 130, so that the paper tube in the limit groove 140 is prevented from being separated from the limit groove 140 due to the overlarge swing angle of the bracket arm 130.
In some specific embodiments, the frame 100 is provided with a limiting seat 210, and the limiting seat 210 abuts against the bracket 130 to limit the upward swinging angle of the bracket 130, so that the bracket 130 can be limited below the limiting portion 120 of the supporting frame 110 through the abutting of the limiting seat 210 when the bracket 130 is reset, and thus, the bracket 130 can be more stable when idle.
In some specific embodiments, the swing arm 150 includes a first arm 220, a second arm 230, and a third shaft 240 connecting one end of the first arm 220 and one end of the second arm 230, and the bracket 130 is disposed between the first arm 220 and the second arm 230, and the bracket 130 is rotatably connected to the third shaft 240, so that the support of the bracket 130 by the swing arm 150 is smoother.
In some embodiments, the second shaft 190 is coupled to an end of the first arm 220 remote from the third shaft 240 and a middle portion of the second arm 230, and an end of the second arm 230 remote from the third shaft 240 is hinged to the telescopic link 180.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims (7)

1. A paper tube supporting device, comprising:
the first supporting mechanism comprises a frame (100) and two supporting frames (110) arranged on the frame (100), wherein the two supporting frames (110) are respectively used for supporting two ends of a first shaft of a paper tube, a limiting part (120) is arranged at the top of each supporting frame (110), the limiting part (120) is used for limiting the first shaft to move along the horizontal direction, and the top of each limiting part (120) is opened;
the second supporting mechanism comprises two supporting arms (130), wherein the two supporting arms (130) are respectively used for supporting two ends of a first shaft of a paper tube, a limiting groove (140) used for accommodating the end part of the first shaft is formed in the top of each supporting arm (130), the top of each limiting groove (140) is opened, a swinging arm (150) is arranged at the bottom of each supporting arm (130), the middle part of each swinging arm (150) is hinged to the machine frame (100), one end of each swinging arm (150) is hinged to the bottom of each supporting arm (130), a first air cylinder (160) is further arranged on the machine frame (100), each first air cylinder (160) comprises a cylinder body (170) and a telescopic rod (180), each cylinder body (170) is hinged to the machine frame (100), each telescopic rod (180) is hinged to one end of each swinging arm (150) far away from the corresponding supporting arm (130), each first air cylinder (160) is used for driving each swinging arm (150) to swing, each swinging arm (150) swings to drive each lifting supporting arm (130) to lift the corresponding supporting arm (130).
2. A paper tube supporting device according to claim 1, characterized in that the bottom of the limit groove (140) is concave arc.
3. A paper roll supporting device according to claim 1, characterized in that a second shaft (190) is arranged at the hinge center of the swing arm (150) and the frame (100), an extension part (200) is arranged at the bottom of the supporting arm (130), the extension part (200) extends in a direction away from the hinge center of the supporting arm (130) and the swing arm (150), and the extension part (200) abuts against the second shaft (190) to limit the downward swinging angle of the supporting arm (130).
4. A paper tube supporting device according to claim 1, characterized in that a limit seat (210) is arranged on the frame (100), and the limit seat (210) abuts against the supporting arm (130) to limit the upward swinging angle of the supporting arm (130).
5. A paper roll supporting device according to claim 1, characterized in that the swing arm (150) comprises a first arm body (220), a second arm body (230) and a third shaft (240) connecting one end of the first arm body (220) and one end of the second arm body (230), wherein the bracket arm (130) is arranged between the first arm body (220) and the second arm body (230), and the bracket arm (130) is rotatably connected with the third shaft (240).
6. The paper tube supporting device according to claim 1, wherein the limiting portion (120) comprises a first bearing (250) and a second bearing (260) which are arranged in parallel, the first bearing (250) is rotatably connected with the supporting frame (110), the second bearing (260) is rotatably connected with the supporting frame (110), and the first bearing (250) and the second bearing (260) are matched and support the end portion of the first shaft.
7. A paper roll supporting device according to claim 6, characterized in that at least two first bearings (250) are provided, two first bearings (250) are coaxially arranged, and at least two second bearings (260) are provided correspondingly.
CN202321138685.7U 2023-05-11 2023-05-11 Paper tube supporting device Active CN219669665U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202321138685.7U CN219669665U (en) 2023-05-11 2023-05-11 Paper tube supporting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202321138685.7U CN219669665U (en) 2023-05-11 2023-05-11 Paper tube supporting device

Publications (1)

Publication Number Publication Date
CN219669665U true CN219669665U (en) 2023-09-12

Family

ID=87892600

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202321138685.7U Active CN219669665U (en) 2023-05-11 2023-05-11 Paper tube supporting device

Country Status (1)

Country Link
CN (1) CN219669665U (en)

Similar Documents

Publication Publication Date Title
CN219669665U (en) Paper tube supporting device
CN214527817U (en) A go up counter weight assembly and hoisting equipment for hoisting equipment
CN109606834B (en) Bag feeding mechanism of packaging machine
CN207632174U (en) A kind of unwinding device of printing machine
CN216683333U (en) Discharging device of film blowing machine
CN217050647U (en) Double-glass multi-cavity hollow glass manipulator
CN210287806U (en) Detachable cloth roller applied to high-temperature jig dyeing machine
CN214455455U (en) Automatic lifting film feeding mechanism
CN210211442U (en) Electric drum unloading device
CN214527818U (en) A back counter weight assembly and hoisting equipment for hoisting equipment
CN217675759U (en) Unreeling device for gravure printing machine
CN110422696A (en) The electronic lifting apparatus of tube
CN210531990U (en) Display lifting support frame
CN112524452A (en) Intelligent multimedia android online teaching interaction all-in-one machine
CN220617086U (en) Coiled material transfer device
CN216685156U (en) Convertible tray mechanism convenient to packing article unloading
CN217172965U (en) Clamping structure is transported to knitted fabric book
CN220672001U (en) Goods shelves adjustable intelligent vending machine
CN216501538U (en) Transmission shaft suspension device for multi-roll mill
CN215781769U (en) Filter press convenient to installation is fixed
CN213595242U (en) Material elevator is used in phenoxyacetic acid production
CN210013050U (en) Independent transmission compression roller
CN211644065U (en) Support device in winding shaft
CN216476257U (en) Hanging flower basket forward automatic leveling mechanism
CN216301130U (en) Folding layer board device of dead pig transfer car (buggy)

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant