CN216759312U - Tailing filling core sample grinding machine - Google Patents
Tailing filling core sample grinding machine Download PDFInfo
- Publication number
- CN216759312U CN216759312U CN202123259325.6U CN202123259325U CN216759312U CN 216759312 U CN216759312 U CN 216759312U CN 202123259325 U CN202123259325 U CN 202123259325U CN 216759312 U CN216759312 U CN 216759312U
- Authority
- CN
- China
- Prior art keywords
- clamping
- clamping surface
- filling core
- sample
- core sample
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model provides a grinding machine for tailing filling core samples, which comprises a sample clamping device and a grinding device for grinding samples, wherein the sample clamping device is used for clamping a sample; the sample clamping device comprises a first clamping surface and a second clamping surface; the first clamping surface is driven by a first driving mechanism and moves towards or away from the second clamping surface; the second clamping surface is driven by a second driving mechanism and moves towards or away from the first clamping surface; the radian of the first clamping part is smaller than that of a tailing filling core sample of a corresponding area; the second clamping surface is provided with a second clamping part, and the radian of the second clamping part is matched with that of a tailing filling core sample in a corresponding area; the first clamping part and the second clamping part jointly form a tailing filling core sample clamping area. The concrete grinding machine effectively applies the concrete grinding machine in the prior art to grinding the tailing filling core sample.
Description
Technical Field
The utility model relates to the field of core sample polishing, in particular to a tailing filling core sample polishing machine.
Background
In the field of mining industry, tailing filling is applied to mines in recent years, and no relevant standard exists in core sample processing and strength detection. The existing mining filling core sample processing is that after cutting, the core sample is manually scraped off the upper plane and the lower plane of a cylinder by an art designer; the processing tool is a vertical steel plate welded on the I-shaped steel and used as a plane reference for strickling; after the sample is manually scraped, the sample is manually flattened again when the lack of the plane flatness is found in the strength detection process. During the strength detection, the upper plane and the lower plane of a core sample (cylinder) are stressed, and the two planes are not completely parallel to influence the accuracy of the strength detection data.
The core plane is scraped by hand, the processing time is long, the length of each stope core sample is 50m or more, a section of core sample is taken every 1 m of core to detect the strength, and 2-3 cut core samples are processed for 3-4 hours. The rock core after processing finds that the plane flatness is deficient again through manual flattening in the intensity testing process, if two face of cylinder nonparallel of the rock core sample after processing, can reduce rock core compressive strength, leads to the sample compressive strength that detects to hang down.
The existing grinders used approximately are mainly concrete core sample grinders, such as CN215092511U concrete core sample grinding machine, CN213531894U concrete core sample grinding machine, CN206748108U concrete core sample grinding machine, CN210649879U semi-automatic concrete cylinder core sample grinding machine, etc. The prior art improves the grinding machine to meet various scene requirements.
However, after the applicant researches the prior art, most of the existing grinding machines adopt line contact to realize clamping, and the clamping force of the line clamping is distributed along the axial direction and the circumferential direction of the sample. According to the analysis from the sample angle, the strength of the tailing filling core sample is lower than that of a concrete core sample, and the tailing filling core sample is clamped by adopting the stress in the axial direction, so that the tailing filling core sample is easy to deform; secondly, whether the tailing filling core sample deforms or not in the grinding process cannot be detected. How to improve on current concrete polisher in order to satisfy the needs of polishing of tailing filling core appearance is then the key technical problem that technical personnel in the mining industry field need solve to realize that the minimum cost is applied to the mining industry field with the equipment of prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a tailing filling core sample grinding machine which effectively applies the concrete grinding machine in the prior art to grinding tailing filling core samples.
In order to achieve the above purpose, the utility model provides the following technical scheme: a grinding machine for tailing filling core samples comprises a sample clamping device and a grinding device for grinding samples; the sample clamping device comprises a first clamping surface and a second clamping surface; the first clamping surface is driven by a first driving mechanism and moves towards or away from the second clamping surface; the second clamping surface is driven by a second driving mechanism and moves towards or away from the first clamping surface; the radian of the first clamping part is smaller than that of a corresponding area tailing filling core sample; the second clamping surface is provided with a second clamping part, and the radian of the second clamping part is matched with the radian of the tailing filling core sample of the corresponding area; the first clamping part and the second clamping part jointly form a tailing filling core sample clamping area.
As an improved technical solution of the present application, the sample holding device includes two first holding surfaces, which are respectively defined as a first holding surface a and a first holding surface B; the first clamping surface A is driven by a first driving mechanism and moves towards or away from the first clamping surface B; the first clamping surface B is driven by the second driving mechanism and moves towards or away from the first clamping surface A; the second clamping surface is mounted at the clamping part of the first clamping surface B.
As an improved technical scheme of the application, a plurality of clamping grooves are arranged in the clamping part of the first clamping surface B along the height direction of the tailing filling core sample, and the same distance is reserved between any two adjacent clamping grooves; the second clamping surface is provided with two convex blocks on the back surface of the second clamping part, and the distance between the two convex blocks is the same as the distance between any two adjacent clamping grooves; the second clamping surface is arranged on the first clamping surface B through the matching of the convex block and the clamping groove.
As the improved technical scheme of this application, a plurality of magnetic force pieces are laid to the direction of height that the core appearance was filled to the tailing along the clamping part of first clamping face B, the second clamping face adopts the magnetism material, the second clamping face pass through the absorption of magnetic force piece install in on the first clamping face B.
As an improved technical scheme of the present application, the first clamping surface a is formed with first clamping flanges a extending outwards on both sides of the first clamping portion; the first clamping surface B is provided with first clamping flanges B which extend outwards on two sides of the first clamping part respectively; the clamping range of the second clamping surface is equal to that of the first clamping part; the first clamping surface A and the first clamping surface B are connected through the first clamping flange A and the first clamping flange B in a bolt locking mode.
As an improved technical scheme of the application, the height of the second clamping surface is not more than that of the first clamping surface; and defining the height direction to be the height direction corresponding to the tailing filling core sample in the grinding process.
As an improved technical scheme of the application, two ends of the top surface of the second clamping surface are respectively provided with a group of infrared emitters for emitting infrared rays along the height direction and an infrared emitter for emitting infrared rays along the vertical height direction; wherein, the polishing device is correspondingly provided with an infrared receiver for receiving infrared rays emitted along the height direction; the first clamping surface is correspondingly provided with an infrared receiver used for receiving infrared rays emitted along the vertical height direction.
As an improved technical scheme of the application, the first clamping surface is coated with a friction-resistant corrosion-resistant coating.
As an improved technical scheme of the application, the second clamping surface is coated with a friction-resistant corrosion-resistant coating.
As an improved technical scheme of the application, the first clamping surface is respectively provided with a first clamping flange extending outwards on two sides of the first clamping part; the second clamping surface is provided with second clamping flanges which extend outwards at two sides of the second clamping part respectively; the first clamping surface and the second clamping surface adopt bolts to lock the first clamping flange and the second clamping flange so as to form a clamping part with clamping force.
Has the advantages that:
according to the technical scheme, the utility model provides the grinding machine for the tailing filling core sample, which mainly changes the clamping device of the concrete grinding machine in the prior art and realizes the application of the concrete grinding machine on the tailing filling core sample.
The method is characterized in that two clamping parts of a clamping device are set to be different in radian, wherein the clamping part with one radian provides linear contact of the tailing filling core sample along the height direction, and the clamping part with the other radian provides surface contact of the tailing filling core sample. The linear contact can facilitate the lofting of the tailing filling core sample, and the surface contact can provide one-direction constraint for the tailing filling core sample to prevent two planes of the tailing filling core sample from being unparallel. The method has the advantages that the clamping force can be reduced to clamp the tailing filling core sample; and secondly, whether the tailing filling core sample is damaged or not can be visually observed in the clamping process. When the clamping device in the prior art is directly adopted, the strength of the tailing filling core sample is not enough, so that the clamping force of the tailing filling core sample can be increased in order to keep the stability of the tailing filling core sample in the polishing process, and the tailing filling core sample can be damaged. Certainly, the improvement process can also set the radian that matches the ground sample to two clamping parts, but it can't observe whether there is damage to the sample in the clamping process.
In addition, this application is in the second clamping face respectively establishes a set of infrared emitter along direction of height transmission infrared ray at the both ends of top surface, with along perpendicular direction of height transmission infrared ray's infrared emitter, two along direction of height transmission infrared ray's infrared emitter with grinding device is last to correspond to be equipped with and to be used for receiving along direction of height transmission infrared ray's infrared receiver can be used for detecting the polishing in-process, and whether the tailing fills the core appearance and takes place the slope, in case the slope then is used for receiving along direction of height transmission infrared ray's infrared receiver will unable receipt along direction of height transmission infrared ray. The two infrared transmitters for emitting infrared rays along the vertical height direction and the infrared receiver for receiving the infrared rays emitted along the vertical height direction are used for assisting in detecting or verifying whether the tailing filling core sample is inclined, and once the tailing filling core sample is inclined, the infrared receiver for receiving the infrared rays emitted along the direction perpendicular to the height direction cannot receive the infrared rays emitted along the direction perpendicular to the height direction.
It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be considered as part of the inventive subject matter of the present disclosure unless such concepts are mutually inconsistent.
The foregoing and other aspects, embodiments and features of the present teachings will be more fully understood from the following description taken in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of specific embodiments in accordance with the teachings of the present invention.
Drawings
The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of the present application;
FIG. 2 is a schematic diagram of another embodiment of the present application;
in the figure: 1. a first clamping surface; 2. a second clamping surface; 3. a support surface; 4. and (4) bolts.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the utility model without any inventive step, are within the scope of protection of the utility model. Unless defined otherwise, technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Example 1
As shown in fig. 1, the grinding machine for the tailing filling core sample comprises a sample clamping device and a grinding device for grinding the sample; the grinding device that this application was used mainly includes the polishing piece that elevating system, elevating system supported to and drive polishing piece pivoted driving motor.
The sample clamping device comprises a first clamping surface and a second clamping surface; the first clamping surface is driven by a first driving mechanism and moves towards or away from the second clamping surface; the second clamping surface is driven by a second driving mechanism and moves towards or away from the first clamping surface; how the driving mechanism drives the first clamping surface and the second clamping surface to move can be realized by adopting a telescopic cylinder in the prior art to push the first clamping surface and the second clamping surface to move, and when the telescopic cylinder is adopted to push the first clamping surface and the second clamping surface, the end of the telescopic cylinder is connected to the back of the first clamping surface and the back of the second clamping surface.
The movement of the two can also be realized by adopting a manual clamping and screwing mode. When a manual mode is adopted, the first clamping surface 1 is respectively provided with a first clamping flange extending outwards at two sides of the first clamping part; the second clamping surface 2 is respectively provided with a second clamping flange extending outwards at two sides of the second clamping part; the first clamping surface 1 and the second clamping surface 2 lock the first clamping flange and the second clamping flange by bolts to form a clamping part with clamping force. As shown in fig. 1, preferably, the second clamping surface 2 is supported and fixed by the supporting plate 3, and in the tightening process, the first clamping surface 1 and the second clamping surface can be close to each other only by connecting the first clamping surface 1 with the supporting plate 3 by using the tightening bolt 4, so that the clamping force on the tailing filling core sample is improved.
In the technical scheme of this application, whether the skew takes place for the tailing fills the core appearance in the convenient observation clamping process, also for reducing the clamping force to tailing fills the core appearance. The radian of the first clamping part is smaller than that of a corresponding area tailing filling core sample; the second clamping surface is provided with a second clamping part, and the radian of the second clamping part is matched with that of a tailing filling core sample in a corresponding area; the first clamping part and the second clamping part jointly form a tailing filling core sample clamping area. In practical application, the concrete grinding machine can be applied to grinding of the tailing filling core sample only by changing one clamping surface of the existing clamp, and meanwhile, the sample integrity of the tailing filling core sample in the grinding process can be kept.
How to change the clamping part of the existing concrete grinding machine with minimum cost is the key point considered by the application. As shown in fig. 2, one way is that the sample holding device comprises two first holding surfaces, which are respectively defined as a first holding surface a and a first holding surface B; the first clamping surface A is driven by a first driving mechanism and moves towards or away from the first clamping surface B; the first clamping surface B is driven by the second driving mechanism and moves towards or away from the first clamping surface A; the second clamping surface is mounted at the clamping part of the first clamping surface B. The first clamping surface a and the first clamping surface B may have the same structure or different structures, and when having the same structure, the second clamping surface is mounted at the clamping portion of the first clamping surface B. When the structure is different, the first clamping surface B is only a supporting surface, i.e. does not have a clamping portion, the second clamping surface is installed at a position corresponding to the clamping portion of the first clamping surface a (as shown in fig. 1), and the first clamping surface a and the first clamping surface B are fastened by bolts 4.
The installation mode that the second clamping surface is installed at the clamping part of the first clamping surface B can be selected, the clamping part of the first clamping surface B is provided with a plurality of clamping grooves along the height direction of the tailing filling core sample, and any two adjacent clamping grooves have the same distance; the second clamping surface is provided with two convex blocks on the back surface of the second clamping part, and the distance between the two convex blocks is the same as the distance between any two adjacent clamping grooves; the second clamping surface is arranged on the first clamping surface B through the matching of the convex block and the clamping groove. Through selecting different draw-in grooves, can realize that the second clamping face is in relative height on the first clamping face B to satisfy the polishing of the tailing of co-altitude filling core appearance.
The second clamping surface is arranged at the clamping part of the first clamping surface B in a selectable mode, a plurality of magnetic force sheets are distributed on the clamping part of the first clamping surface B along the height direction of the tailing filling core sample, the second clamping surface is made of a magnetic material, and the second clamping surface is arranged on the first clamping surface B through the adsorption of the magnetic force sheets. The magnetic force piece's design can make things convenient for the second clamping face can install fast on first clamping face B, but it can only be used for the less, the lighter tailing of density to fill the core appearance. The second clamping surface is easy to fall off in the use process of the tailings filling core sample with overlarge density.
Meanwhile, when the clamping device is used for manually connecting a first clamping surface A and a first clamping surface B, the first clamping surface A is respectively provided with a first clamping flange A extending outwards on two sides of the first clamping part; the first clamping surface B is provided with first clamping flanges B which extend outwards at two sides of the first clamping part respectively; the clamping range of the second clamping surface is equal to that of the first clamping part; the first clamping surface A and the first clamping surface B are connected through the first clamping flange A and the first clamping flange B in a bolt locking mode.
In order to reduce the height design of the existing concrete grinding machine and ensure the grinding effect, the height of the second clamping surface is not more than that of the first clamping surface; and defining the height direction to be the height direction corresponding to the tailing filling core sample in the grinding process. Of course in some special scenarios, such as to give maximum face support to the tailing fill core sample, the second clamping face may project beyond the first clamping face.
Example 2
Compared with example 1, the hardness of the tailing filling core sample is low, and the density is uneven. The two ends of the top surface of the second clamping surface are respectively provided with a group of infrared emitters for emitting infrared rays along the height direction and an infrared emitter for emitting infrared rays along the vertical height direction; wherein, the polishing device is correspondingly provided with an infrared receiver for receiving infrared rays emitted along the height direction; the first clamping surface is correspondingly provided with an infrared receiver used for receiving infrared rays emitted along the vertical height direction. Two infrared emitters that emit infrared along the direction of height with polishing device is last to correspond to be equipped with and to be used for receiving along the infrared receiver of direction of height emission infrared can be used for detecting the in-process of polishing, and whether the tailing fills the core appearance and takes place the slope, in case the slope then be used for receiving along the infrared receiver of direction of height emission infrared will not receive along the direction of height emission infrared. The two infrared transmitters for emitting infrared rays along the vertical height direction and the infrared receiver for receiving the infrared rays emitted along the vertical height direction are used for assisting in detecting or verifying whether the tailing filling core sample is inclined, and once the tailing filling core sample is inclined, the infrared receiver for receiving the infrared rays emitted along the direction perpendicular to the height direction cannot receive the infrared rays emitted along the direction perpendicular to the height direction.
Example 3
In contrast to example 1 or example 2, the first clamping surface is coated with a friction-resistant corrosion-resistant coating, and the second clamping surface is coated with a friction-resistant corrosion-resistant coating. The product model of good viscosity electronics Limited company in Dongguan city can be adopted: HN2623, abrasion and corrosion resistant coating of Google Bayer coatings GmbH.
Although the utility model has been described with reference to preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the present invention should be determined by the appended claims.
Claims (10)
1. A grinding machine for tailing filling core samples comprises a sample clamping device and a grinding device for grinding samples; the sample clamping device is characterized by comprising a first clamping surface and a second clamping surface; the first clamping surface is driven by a first driving mechanism and moves towards or away from the second clamping surface; the second clamping surface is driven by a second driving mechanism and moves towards or away from the first clamping surface; the radian of the first clamping part is smaller than that of a corresponding area tailing filling core sample; the second clamping surface is provided with a second clamping part, and the radian of the second clamping part is matched with that of a tailing filling core sample in a corresponding area; the first clamping part and the second clamping part jointly form a tailing filling core sample clamping area.
2. The mill according to claim 1, wherein the sample clamping device comprises two first clamping surfaces, which are respectively defined as a first clamping surface A and a first clamping surface B; the first clamping surface A is driven by a first driving mechanism and moves towards or away from the first clamping surface B; the first clamping surface B is driven by the second driving mechanism and moves oppositely or back to back relative to the first clamping surface A; the second clamping surface is mounted at the clamping part of the first clamping surface B.
3. The grinding machine for the tailing filled core samples according to claim 2, wherein a plurality of clamping grooves are formed in the clamping part of the first clamping surface B along the height direction of the tailing filled core samples, and any two adjacent clamping grooves have the same distance; the second clamping surface is provided with two convex blocks on the back surface of the second clamping part, and the distance between the two convex blocks is the same as the distance between any two adjacent clamping grooves; the second clamping surface is arranged on the first clamping surface B through the matching of the convex block and the clamping groove.
4. The mill according to claim 2, wherein the clamping portion of the first clamping surface B is provided with a plurality of magnetic sheets along the height direction of the tailing filling core sample, the second clamping surface is made of a magnetic material, and the second clamping surface is attached to the first clamping surface B by the attraction of the magnetic sheets.
5. The tailing filling core grinding machine according to claim 2, wherein the first clamping surface A is formed with a first clamping flange A extending outwards on each side of the first clamping portion; the first clamping surface B is provided with first clamping flanges B which extend outwards at two sides of the first clamping part respectively; the clamping range of the second clamping surface is equal to that of the first clamping part; the first clamping surface A and the first clamping surface B are connected through the first clamping flange A and the first clamping flange B in a bolt locking mode.
6. The tailings filling core sample grinding machine of claim 1, wherein the height of the second clamping surface is not greater than the height of the first clamping surface; and defining the height direction to be the height direction corresponding to the tailing filling core sample in the grinding process.
7. The tailings filling core sample grinding machine according to claim 1, wherein a group of infrared emitters for emitting infrared rays along the height direction and a group of infrared emitters for emitting infrared rays along the vertical height direction are respectively arranged at two ends of the top surface of the second clamping surface; wherein, the polishing device is correspondingly provided with an infrared receiver for receiving infrared rays emitted along the height direction; the first clamping surface is correspondingly provided with an infrared receiver used for receiving infrared rays emitted along the vertical height direction.
8. The mill of claim 1, wherein the first clamping surface is coated with a friction and corrosion resistant coating.
9. The tailings-filled core-sample grinding machine according to claim 1, wherein the second clamping surface is coated with a friction-resistant and corrosion-resistant coating.
10. The mill according to claim 1, wherein the first clamping surface is formed with a first clamping flange extending outwards on both sides of the first clamping portion; the second clamping surface is provided with second clamping flanges which extend outwards at two sides of the second clamping part respectively; the first clamping surface and the second clamping surface adopt bolts to lock the first clamping flange and the second clamping flange so as to form a clamping part with clamping force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123259325.6U CN216759312U (en) | 2021-12-23 | 2021-12-23 | Tailing filling core sample grinding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123259325.6U CN216759312U (en) | 2021-12-23 | 2021-12-23 | Tailing filling core sample grinding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216759312U true CN216759312U (en) | 2022-06-17 |
Family
ID=81969806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123259325.6U Active CN216759312U (en) | 2021-12-23 | 2021-12-23 | Tailing filling core sample grinding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216759312U (en) |
-
2021
- 2021-12-23 CN CN202123259325.6U patent/CN216759312U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1832894A (en) | Control device for a conveyor | |
| CN216759312U (en) | Tailing filling core sample grinding machine | |
| CN104440266B (en) | Magnetic suspension high ferro conductor rail special fixture | |
| CN110793417A (en) | Ceramic tile flatness detection device | |
| US11598623B2 (en) | Ground-fixing system for a sensor housing | |
| CN105922161B (en) | A kind of sucking disc clamp pawl clamp system | |
| CN101762292A (en) | Clamp frame adjusting device | |
| CN208801204U (en) | A kind of polishing failure detector | |
| CN113463483B (en) | Airport pavement repairing and maintaining system and method based on airport non-stop construction | |
| CN108398332A (en) | A kind of load testing machine | |
| CN204831909U (en) | A geonet clamping device for staight scissors experiment | |
| CN111156978B (en) | Building engineering straightness detection device that hangs down | |
| CN208579732U (en) | A kind of Insulation rail distance keeper size checking device | |
| CN210155718U (en) | Cargo quantity detection device for cabin | |
| CN2890902Y (en) | Ray beam center aligning device | |
| CN217764967U (en) | Top drive hoisting ring inclination angle measuring device | |
| CN205426905U (en) | Rail frame device of detecting a flaw | |
| CN210439344U (en) | Anchor rod clamp | |
| CN219015277U (en) | Auxiliary detection tool and detection device | |
| CN210863581U (en) | Steel ball surface defect detection device | |
| CN218272114U (en) | Ultrasonic flaw detector for building | |
| CN211785334U (en) | Automatic grinding detection device for nuclear power plant pipeline welding seam | |
| CN109238180A (en) | A kind of horizontal plane infrared ray photoelectric testing agency | |
| CN218708412U (en) | Steel wire rope detection device for elevator crane | |
| CN219326191U (en) | Stair slideway conveying device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 230000 Longqiao Town, Lujiang County, Hefei City, Anhui Province Patentee after: Anhui Lujiang Longqiao Mining Co.,Ltd. Address before: 230000 Longqiao Town, Lujiang County, Hefei City, Anhui Province Patentee before: ANHUI PROVINCE LUJIANG LONGQIAO MINING Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |