CN221100057U - Slide block roller slideway detection tool - Google Patents

Slide block roller slideway detection tool Download PDF

Info

Publication number
CN221100057U
CN221100057U CN202322957174.4U CN202322957174U CN221100057U CN 221100057 U CN221100057 U CN 221100057U CN 202322957174 U CN202322957174 U CN 202322957174U CN 221100057 U CN221100057 U CN 221100057U
Authority
CN
China
Prior art keywords
block
inclined surface
sliding
groove
roller
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
CN202322957174.4U
Other languages
Chinese (zh)
Inventor
于洋
于阔
宫亚倩
焦东东
刘旭琛
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.)
Weidi Intelligent Equipment Handan Co ltd
Original Assignee
Weidi Intelligent Equipment Handan 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 Weidi Intelligent Equipment Handan Co ltd filed Critical Weidi Intelligent Equipment Handan Co ltd
Priority to CN202322957174.4U priority Critical patent/CN221100057U/en
Application granted granted Critical
Publication of CN221100057U publication Critical patent/CN221100057U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Bearings For Parts Moving Linearly (AREA)

Abstract

The utility model provides a detection tool for a sliding block roller slideway, which belongs to the technical field of linear guide rails and comprises a first block body, a first sliding part, a second block body, a second sliding part and four cylinders; one side of the first block body is provided with a first inclined surface; the first block is provided with a first supporting surface, the first sliding part is arranged on the first inclined surface, the second block is provided with a second inclined surface, and the second block is provided with a second supporting surface; the second sliding part is arranged on the second inclined surface and is in sliding fit with the first sliding part; the four cylinders are arranged in the four roller slideways, the two first supporting surfaces are positioned between the two roller slideways on the same side of the sliding block and are respectively connected with the two corresponding cylinders, and the two second supporting surfaces are positioned between the two roller slideways on the other side of the sliding block and are respectively connected with the two corresponding cylinders. The detection tool for the sliding block roller slideway simplifies operation steps and improves working efficiency.

Description

Slide block roller slideway detection tool
Technical Field
The utility model belongs to the technical field of linear guide rails, and particularly relates to a detection tool for a sliding block roller slideway.
Background
After the linear guide rail and the sliding block are processed, a retainer and a roller are required to be arranged in the sliding block, so that the sliding block is arranged on the linear guide rail in a sliding fit manner, but due to the problems of processing precision and the like, the roller cannot smoothly and smoothly move in a roller slideway on the sliding block, and the sliding block cannot be normally used; at this time, it is necessary to take the slider off the linear guide rail and take out the holder and the roller in the slider, thereby performing operations such as inspection and repair on the slider itself. The mode causes redundant linear guide rail and slider installation, disassembly and other operations, the operation is more complicated, and the work efficiency is lower.
Disclosure of utility model
The utility model aims to provide a detection tool for a sliding block roller slideway, which solves the technical problems of complex operation and low working efficiency caused by the fact that a sliding block is directly assembled on a linear guide rail in the prior art.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a slider roller slideway detection tool, which comprises a first block body, a first sliding part, a second block body, a second sliding part and four cylinders; a first inclined surface is arranged on one side of the first block body; the width of the first block linearly changes along the length direction of the first inclined surface; the upper end and the lower end of one side, far away from the first inclined surface, of the first block are respectively provided with a first supporting surface; the first sliding part is fixedly arranged on the first inclined surface and is arranged along the length direction of the first inclined surface; a second inclined surface matched with the first inclined surface is arranged on one side of the second block body, and the inclination angles of the first inclined surface and the second inclined surface are consistent; the width of the second block body linearly changes along the length direction of the second inclined surface; the upper end and the lower end of one side, far away from the second inclined surface, of the second block body are respectively provided with a second supporting surface; the second sliding part is fixedly arranged on the second inclined surface and is arranged along the length direction of the first inclined surface; the second sliding part is installed in a sliding fit with the first sliding part; the four cylinders are respectively matched and installed in four roller slideways of the sliding block, two first supporting surfaces are positioned between the two roller slideways on the same side of the sliding block and are respectively connected with the corresponding two cylinders, and two second supporting surfaces are positioned between the two roller slideways on the other side of the sliding block and are respectively connected with the corresponding two cylinders.
In one possible implementation manner, the first sliding portion includes a protruding block and a limiting groove, the protruding block extends outwards from the first inclined surface, and the limiting groove is formed on the protruding block; the second sliding part comprises a sliding groove and a limiting block, wherein the sliding groove is formed in the second inclined surface and is connected with the protruding block in a sliding fit mode, and the limiting block is arranged in the sliding groove and is connected with the limiting groove in a sliding fit mode.
In one possible implementation manner, the outer side surface of the protruding block is of a columnar structure, and two limit grooves which are arranged up and down are formed by the outer side surface of the protruding block and the first inclined surface; the sliding groove is an arc-shaped groove, and limiting blocks matched with the limiting grooves are arranged at the upper end and the lower end of the sliding groove.
In one possible implementation, the protruding block is integrally formed with the first block, and the two limiting blocks are integrally formed with the second block.
In one possible implementation manner, an arc-shaped structure is arranged between the two first supporting surfaces, and an arc-shaped structure is arranged between the two second supporting surfaces.
In one possible implementation, the average width of the first mass is equal to the average width of the second mass.
In one possible implementation manner, the first supporting surface and the second supporting surface are inclined surfaces, and the two first supporting surfaces are respectively connected with the corresponding two cylinders from bottom to top or from top to bottom, and the two second supporting surfaces are respectively connected with the corresponding two cylinders from bottom to top or from top to bottom.
In one possible implementation, the end faces of the first block and the second block are each provided with a holding groove.
In one possible implementation manner, the first inclined surface is provided with a long strip groove and an elastic piece arranged in the long strip groove, the elastic piece is arranged at one end of the long strip groove, and the length direction of the elastic piece is consistent with the length direction of the long strip groove; the second inclined surface is provided with a clamping block positioned in the strip groove, the clamping block is connected in the strip groove in a sliding mode, and one end of the clamping block is connected with the elastic piece.
The sliding block roller slideway detection tool provided by the utility model has the beneficial effects that: compared with the prior art, the detection tool for the sliding block roller slideway has the advantages that when the detection tool is used, four cylinders are respectively arranged in the four roller slideway, and the detection tool formed by the first block body and the second block body is arranged in the sliding block and positioned among the four cylinders; the first block and the second block are controlled by a worker to move along the first inclined plane and the second inclined plane by virtue of the sliding fit relation of the first sliding part and the second sliding part, so that the distance between the first supporting surface and the second supporting surface on the first block and the second block is increased, the two first supporting surfaces and the two second supporting surfaces are respectively abutted to the corresponding two cylinders, the cylinders are matched and installed in the corresponding roller pipelines, and interaction force is formed between the first supporting surfaces, the second supporting surfaces and the cylinders; the staff controls four cylinders to move in the roller slideway and the cylinders rotate, and whether the roller slideway has good machining precision or not is judged through the stability and friction force in the cylinder action process, and the slide blocks and the linear guide rails are not required to be completely assembled and then checked, so that the operation steps are simplified, and the working efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a usage state of a detection tool for a sliding block roller slideway according to an embodiment of the present utility model;
FIG. 2 is a front view of a slider roller race detection tool according to an embodiment of the present utility model;
FIG. 3 is an enlarged view of FIG. 2 at A;
FIG. 4 is a top view of a first embodiment of a slider roller race inspection tool;
FIG. 5 is a second top view of a slider roller race detection tool according to an embodiment of the present utility model;
FIG. 6 is a top view III of a slider roller slideway detection tool provided by an embodiment of the utility model;
Fig. 7 is a schematic connection diagram of the elongated groove, the elastic member and the clamping block according to the embodiment of the utility model.
Wherein, each reference sign in the figure:
1. A first block; 11. a first inclined surface; 12. a first support surface; 13. an arc-shaped structure; 14. a long groove; 15. an elastic member; 2. a first sliding portion; 21. a protruding block; 22. a limit groove; 3. a second block; 31. a second inclined surface; 32. a second support surface; 33. a clamping block; 4. a second sliding part; 41. a sliding groove; 42. a limiting block; 5. a cylinder; 6. a sliding block.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are 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 one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1 to 6, a slider roller slideway detection tool provided by the utility model will now be described. A slide block roller slideway detection tool comprises a first block body 1, a first sliding part 2, a second block body 3, a second sliding part 4 and four cylinders 5; a first inclined surface 11 is arranged on one side of the first block body 1; the width of the first block 1 linearly varies along the length direction of the first inclined surface 11; the upper end and the lower end of one side of the first block body 1 far away from the first inclined surface 11 are respectively provided with a first supporting surface 12; the first sliding part 2 is fixedly mounted on the first inclined surface 11 and is arranged along the length direction of the first inclined surface 11; a second inclined surface 31 matched with the first inclined surface 11 is arranged on one side of the second block 3, and the inclination angles of the first inclined surface 11 and the second inclined surface 31 are consistent; the width of the second block 3 varies linearly along the length direction of the second inclined surface 31; the upper end and the lower end of one side of the second block 3 far away from the second inclined surface 31 are respectively provided with a second supporting surface 32; the second sliding part 4 is fixedly mounted on the second inclined surface 31 and is arranged along the length direction of the first inclined surface 11; the second sliding part 4 is mounted in sliding fit with the first sliding part 2. The four cylinders 5 are respectively matched and installed in the four roller slideways of the sliding block 6, the two first supporting surfaces 12 are positioned between the two roller slideways on the same side of the sliding block 6 and are respectively connected with the corresponding two cylinders 5, and the two second supporting surfaces 32 are positioned between the two roller slideways on the other side of the sliding block 6 and are respectively connected with the corresponding two cylinders 5.
Compared with the prior art, the detection tool for the sliding block roller slideway provided by the utility model has the advantages that when in use, the four cylinders 5 are respectively arranged in the four roller slideway, and the detection tool formed by the first block 1 and the second block 3 is arranged in the sliding block 6 and positioned among the four cylinders 5; the worker controls the first block 1 and the second block 3 to move along the first inclined surface 11 and the second inclined surface 31 by virtue of the sliding fit relation of the first sliding part 2 and the second sliding part 4, so that the distance between the first supporting surface 12 and the second supporting surface 32 on the first block 1 and the second block 3 is increased, the two first supporting surfaces 12 and the two second supporting surfaces 32 are respectively abutted to the two corresponding cylinders 5, the cylinders 5 are matched and installed in the corresponding roller pipelines, and interaction force is formed among the first supporting surfaces 12, the second supporting surfaces 32 and the cylinders 5; the staff controls four cylinders 5 to move in the roller slide ways and the cylinders 5 rotate, and whether the roller slide ways have good machining precision or not is judged through the stability and friction force in the action process of the cylinders 5, and the slide blocks 6 and the linear guide rails are not required to be completely assembled and then checked, so that the operation steps are simplified, and the working efficiency is improved.
Referring to fig. 1 to 3, as a specific embodiment of the slide block roller slideway detection tool provided by the utility model, a first sliding part 2 includes a protruding block 21 and a limiting groove 22, the protruding block 21 extends outwards from a first inclined surface 11, and the limiting groove 22 is arranged on the protruding block 21; the second sliding part 4 comprises a sliding groove 41 and a limiting block 42, the sliding groove 41 is arranged on the second inclined surface 31 and is connected with the protruding block 21 in a sliding fit manner, and the limiting block 42 is arranged in the sliding groove 41 and is connected with the limiting groove 22 in a sliding fit manner; the sliding groove 41 on the second sliding part 4 is in sliding fit with the protruding block 21 on the first sliding part 2, so that the sliding fit between the first block 1 and the second block 3 is stable and accurate; the protruding block 21 is provided with a limit groove 22, the sliding groove 41 is provided with a limit block 42 which is matched with the limit groove 22, and the first block 1 and the second block 3 are moved along the length direction of the first inclined surface 11 and the second inclined surface 31 by the limit block 42 without separating the first block 1 and the second block 3 along the direction vertical to the first inclined surface 11.
Referring to fig. 1 to 6, as a specific embodiment of the slide block roller slideway detection tool provided by the utility model, the outer side surface of the protruding block 21 has a columnar structure, and two limit grooves 22 are formed by the outer side surface of the protruding block 21 and the first inclined surface 11, which are arranged up and down; the sliding groove 41 is an arc-shaped groove, and the upper end and the lower end of the sliding groove 41 are respectively provided with a limiting block 42 which is matched with the limiting groove 22; the columnar structure of the protruding block 21 is provided, the sliding groove 41 is an arc groove, so that the first sliding part 2 and the second sliding part 4 have good sliding fit, and the limiting groove 22 is formed by surrounding the protruding block 21, which is close to the outer side surface of the first inclined surface 11, with the first inclined surface 11, without special processing.
Preferably, the protruding block 21 is integrally formed with the first block 1, and the two limiting blocks 42 are integrally formed with the second block 3, so that the mounting strength and the firmness of the first block 1 and the protruding block 21 are improved, and the first supporting surface 12 acts on the corresponding cylinder 5 accurately and stably; in this way, too, the mounting strength and the firmness of the second block 3 and the protruding block 21 are improved, so that the second support surface 32 acts exactly and smoothly on the corresponding cylinder 5.
Referring to fig. 1 and fig. 2, as a specific embodiment of the slide block roller slideway detection tool provided by the utility model, an arc structure 13 is arranged between two first supporting surfaces 12, and an arc structure 13 is arranged between two second supporting surfaces 32, so that the width dimension of the whole detection tool can be reduced by means of the arc structure 13, the detection tool is convenient to be installed inside a slide block 6, and meanwhile, the arc structure 13 is not easy to scratch, punch the hands of workers and the like.
Referring to fig. 4 to 6, as a specific embodiment of the detection tool for a sliding block roller slideway provided by the present utility model, the average width of the first block 1 is equal to the average width of the second block 3; the first block 1 and the second block 3 are similar in appearance and are arranged in a central symmetry mode, so that the gravity center of the whole detection tool is close to the first inclined surface 11 and the second inclined surface 31, and the stability is higher.
Referring to fig. 1 and 2, as a specific embodiment of the slide block roller slideway detection tool provided by the present utility model, the first supporting surface 12 and the second supporting surface 32 are inclined surfaces, and the two first supporting surfaces 12 are respectively connected with the two corresponding cylinders 5 from bottom to top or from top to bottom, and the two second supporting surfaces 32 are respectively connected with the two corresponding cylinders 5 from bottom to top or from top to bottom. The two first supporting surfaces 12 which are arranged up and down are respectively positioned below and above the two roller slideways on the same side, so that the two upper and lower first supporting surfaces 12 which are used as inclined surfaces are respectively supported on the corresponding cylinders 5 from bottom to top and from top to bottom, and better supporting and limiting effects can be achieved; similarly, the two second supporting surfaces 32 are disposed up and down below and above the two roller tracks on the other side, so that the two upper and lower second supporting surfaces 32 serving as inclined surfaces are supported on the corresponding cylinders 5 from bottom to top and from top to bottom, respectively, and good supporting and limiting effects can be achieved. The first support surface 12 and the second support surface 32 can act more accurately and firmly on the four cylinders 5 by means of the inclined surfaces.
Referring to fig. 1 to 6, as a specific embodiment of the slide block roller slideway detection tool provided by the utility model, holding grooves are formed on the end surfaces of a first block 1 and a second block 3; after the first block 1 and the second block 3 are installed into the installation groove of the sliding block 6 by a worker, when the first block 1 and the second block 3 are controlled to be separated, the fingers of the worker enter the holding groove, and the relative movement between the first block 1 and the second block 3 can be pushed more accurately and conveniently. The holding grooves are similar to fingers and are arranged on the end surfaces of the first block 1 and the second block 3.
Referring to fig. 1, fig. 2 and fig. 7, as a specific embodiment of the slide block roller slideway detection tool provided by the utility model, a long groove 14 and an elastic member 15 installed in the long groove 14 are arranged on the first inclined surface 11, the elastic member 15 is installed at one end of the long groove 14, and the length direction of the elastic member 15 is consistent with the length direction of the long groove 14; the second inclined surface 31 is provided with a clamping block 33 positioned in the strip groove 14, the clamping block 33 is slidably connected in the strip groove 14, and one end of the clamping block 33 is connected with the elastic piece 15; the normal state of the first block 1 and the second block 3 is separated by the elastic member 15, namely, the four cylinders 5 are pressed and positioned in the four roller slides of the sliding block 6, so that the operation of staff is more convenient. When the detection tool is installed in the sliding block 6, a worker is required to control the first block 1 and the second block 3 to approach or reversely slide and separate until the width of the whole detection tool is smaller. The elastic member 15 is a spring, and the clamping block 33 is a protruding structure integrally formed on the first block 1.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (9)

1. The detection tool for the sliding block roller slideway is characterized by comprising a first block body, a first sliding part, a second block body, a second sliding part and four cylinders; a first inclined surface is arranged on one side of the first block body; the width of the first block linearly changes along the length direction of the first inclined surface; the upper end and the lower end of one side, far away from the first inclined surface, of the first block are respectively provided with a first supporting surface; the first sliding part is fixedly arranged on the first inclined surface and is arranged along the length direction of the first inclined surface; a second inclined surface matched with the first inclined surface is arranged on one side of the second block body, and the inclination angles of the first inclined surface and the second inclined surface are consistent; the width of the second block body linearly changes along the length direction of the second inclined surface; the upper end and the lower end of one side, far away from the second inclined surface, of the second block body are respectively provided with a second supporting surface; the second sliding part is fixedly arranged on the second inclined surface and is arranged along the length direction of the first inclined surface; the second sliding part is installed in a sliding fit with the first sliding part; the four cylinders are respectively matched and installed in four roller slideways of the sliding block, two first supporting surfaces are positioned between the two roller slideways on the same side of the sliding block and are respectively connected with the corresponding two cylinders, and two second supporting surfaces are positioned between the two roller slideways on the other side of the sliding block and are respectively connected with the corresponding two cylinders.
2. The slider roller slideway testing tool according to claim 1, wherein the first sliding part comprises a protruding block and a limit groove, the protruding block extends outwards from the first inclined surface, and the limit groove is formed in the protruding block; the second sliding part comprises a sliding groove and a limiting block, wherein the sliding groove is formed in the second inclined surface and is connected with the protruding block in a sliding fit mode, and the limiting block is arranged in the sliding groove and is connected with the limiting groove in a sliding fit mode.
3. The sliding block roller slideway detection tool according to claim 2, wherein the outer side surface of the protruding block is of a columnar structure, and the outer side surface of the protruding block and the first inclined surface form two limiting grooves which are arranged up and down; the sliding groove is an arc-shaped groove, and limiting blocks matched with the limiting grooves are arranged at the upper end and the lower end of the sliding groove.
4. The slider roller race detection tool of claim 3 wherein said protruding block is integrally formed with said first block and both said stopper blocks are integrally formed with said second block.
5. The tool of claim 1, wherein an arc-shaped structure is provided between the two first support surfaces and an arc-shaped structure is provided between the two second support surfaces.
6. The slider roller ramp inspection tool of claim 1 wherein the average width of the first block is equal to the average width of the second block.
7. The tool of claim 1, wherein the first support surface and the second support surface are inclined surfaces, and the two first support surfaces are respectively connected with the corresponding two cylinders from bottom to top or from top to bottom, and the two second support surfaces are respectively connected with the corresponding two cylinders from bottom to top or from top to bottom.
8. The slider roller slide inspection tool of claim 1 wherein the end surfaces of the first block and the second block are each provided with a gripping slot.
9. The sliding block roller slideway detection tool according to claim 1, wherein the first inclined surface is provided with a long strip groove and an elastic piece arranged in the long strip groove, the elastic piece is arranged at one end of the long strip groove, and the length direction of the elastic piece is consistent with the length direction of the long strip groove; the second inclined surface is provided with a clamping block positioned in the strip groove, the clamping block is connected in the strip groove in a sliding mode, and one end of the clamping block is connected with the elastic piece.
CN202322957174.4U 2023-11-01 2023-11-01 Slide block roller slideway detection tool Active CN221100057U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202322957174.4U CN221100057U (en) 2023-11-01 2023-11-01 Slide block roller slideway detection tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202322957174.4U CN221100057U (en) 2023-11-01 2023-11-01 Slide block roller slideway detection tool

Publications (1)

Publication Number Publication Date
CN221100057U true CN221100057U (en) 2024-06-07

Family

ID=91327916

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202322957174.4U Active CN221100057U (en) 2023-11-01 2023-11-01 Slide block roller slideway detection tool

Country Status (1)

Country Link
CN (1) CN221100057U (en)

Similar Documents

Publication Publication Date Title
CN111397474A (en) Tool assembly for quickly inspecting sliding rail
CN102261898B (en) Comprehensive accuracy detector of rolling linear guide rail pair
CN105157657A (en) Reflective mirror type detection system and method
CN221100057U (en) Slide block roller slideway detection tool
CN111331381A (en) Guide rail
CN202074954U (en) Comprehensive precision detector for rolling linear guide rail pair
CN113899293B (en) Quick detection device of special-shaped part appearance
CN207600336U (en) A kind of door and window detection fixture
CN110980246A (en) Test tube pushing and rail transferring system and rail transferring method
CN114406545B (en) Sliding type workbench for welding positioning pin on car body
CN215811632U (en) Automatic detection device for rolling linear guide rail pair
CN209919270U (en) Button spring assembly platform with locate function
CN107322222B (en) Groove type solar photo-thermal collector bracket installation and debugging tooling
CN113739830A (en) Test fixture bears device
CN207656064U (en) A kind of hand-held guide rail spot-welding equipment
CN212645676U (en) Verticality detection tool
CN220931944U (en) Quick straightness accuracy detection device of bumper shock absorber piston rod
CN117989964B (en) High-rigidity precise linear motion module slider detection gauge
CN219200246U (en) Slip detection mechanism
CN219212164U (en) Track assembling mechanism
CN216620982U (en) Roughness test fixing device
CN218470345U (en) Movable objective table device for hardness measurement
CN212340143U (en) Curved surface plate surface profile tolerance gauge
CN216706734U (en) Workpiece fixing device of machine tool
CN218097530U (en) Positioning device for detecting axial clearance of screw rod

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant