CN112482702A - Wall mortar strickles equipment off - Google Patents

Wall mortar strickles equipment off Download PDF

Info

Publication number
CN112482702A
CN112482702A CN202011222650.2A CN202011222650A CN112482702A CN 112482702 A CN112482702 A CN 112482702A CN 202011222650 A CN202011222650 A CN 202011222650A CN 112482702 A CN112482702 A CN 112482702A
Authority
CN
China
Prior art keywords
wall
scraping
water
gear
scraper
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.)
Pending
Application number
CN202011222650.2A
Other languages
Chinese (zh)
Inventor
廖红玉
鲁丙奎
甘艳生
易新虎
周婷
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.)
China First Metallurgical Group Co Ltd
Original Assignee
China First Metallurgical Group 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 China First Metallurgical Group Co Ltd filed Critical China First Metallurgical Group Co Ltd
Priority to CN202011222650.2A priority Critical patent/CN112482702A/en
Publication of CN112482702A publication Critical patent/CN112482702A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F21/00Implements for finishing work on buildings
    • E04F21/02Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
    • E04F21/16Implements for after-treatment of plaster or the like before it has hardened or dried, e.g. smoothing-tools, profile trowels
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F21/00Implements for finishing work on buildings
    • E04F21/02Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
    • E04F21/16Implements for after-treatment of plaster or the like before it has hardened or dried, e.g. smoothing-tools, profile trowels
    • E04F21/161Trowels
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F21/00Implements for finishing work on buildings
    • E04F21/02Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
    • E04F21/16Implements for after-treatment of plaster or the like before it has hardened or dried, e.g. smoothing-tools, profile trowels
    • E04F21/161Trowels
    • E04F21/163Trowels with exchangeable blades

Abstract

The application discloses wall mortar screeding equipment, include the frame and strickle the mechanism off. The scraping mechanism is located the frame, the scraping mechanism is provided with a scraper blade for scraping wall mortar and a driving structure for driving the scraper blade to rotate around a rotation axis perpendicular to the wall, and the scraper blade is connected with the driving structure. The equipment can effectively reduce the number of workers in site construction, reduce the labor intensity of the workers and improve the efficiency and quality of construction.

Description

Wall mortar strickles equipment off
Technical Field
The application relates to the field of building, especially relates to a wall mortar strickles equipment off.
Background
At present, the domestic building industry develops fire heat, and the mortar is firstly sprayed on the wall surface when the wall surface is decorated, then the mortar is strickled off, and the next processes such as ceramic tile sticking or putty scraping are convenient. The technical level of site construction workers is uneven, the labor intensity of the workers is high, the construction efficiency is low, the construction quality is difficult to guarantee, and the labor cost is high.
Content of application
The application provides a wall mortar screeding equipment can improve the efficiency and the quality of construction.
In a first aspect, an embodiment of the present application provides a wall surface mortar scraping device, which includes a frame and a scraping structure. The scraping mechanism is positioned on the frame and is provided with a scraping plate for scraping wall surface mortar and a driving structure for driving the scraping plate to rotate around a rotating axis vertical to the wall surface, and the scraping plate is connected with the driving structure.
In some of these embodiments, the squeegee has a blade that is perpendicular to the wall surface, and the blade is removably mounted to the squeegee.
In some of these embodiments, the drive structure includes a scraper connection member, a first gear, a second gear, and a motor, the scraper connection member being connected to the scraper, the first gear being connected to the scraper connection member, the second gear being in mesh with the first gear, and an output shaft of the motor being connected to the second gear.
In some of these embodiments, the screeds have a spout with the axis of the spout outlet parallel to the wall surface. The scraper connecting piece is provided with a containing cavity, the containing cavity is provided with a water outlet and a water inlet, the water outlet is communicated with an inlet of the water spraying pipe, and the axis of the water inlet coincides with the rotation axis of the scraper. The strickle mechanism also comprises a water supply structure which supplies water
The structure is provided with a water supply cavity, the water supply cavity is provided with a water outlet and a water supply opening, and the water outlet is rotatably communicated with the water inlet in a sealing way.
In some of these embodiments, the spray pipes include a first spray pipe and a second spray pipe, the first spray pipe and the second spray pipe being located on opposite sides of the blade.
In some of these embodiments, the spray pipes are removably mounted to the flight.
In some of these embodiments, the strike mechanism is mounted to the frame for up and down movement. The wall surface mortar scraping equipment comprises a driving mechanism for driving the scraping mechanism to move up and down, and the driving mechanism is connected with the scraping mechanism.
In some of these embodiments, the frame has a chute, which is vertically disposed. The strickle mechanism has the installation gyro wheel, and the installation gyro wheel is located the spout.
In some of these embodiments, the chute has an inner chute and an outer chute, the inner chute being mounted for up-and-down movement in the outer chute.
In some embodiments, the driving mechanism comprises a reversing pulley, a winding device for winding and a traction rope, the reversing pulley and the winding device are both positioned on the rack, the traction rope is wound on the reversing pulley, and two ends of the traction rope are respectively connected with the leveling mechanism and the winding device.
According to the embodiment of the application, the wall surface mortar scraping equipment comprises a rack and a scraping mechanism. The scraping mechanism is located the frame, the scraping mechanism is provided with a scraper blade for scraping wall mortar and a driving structure for driving the scraper blade to rotate around a rotation axis perpendicular to the wall, and the scraper blade is connected with the driving structure. The equipment can effectively reduce the number of workers in site construction, reduce the labor intensity of the workers and improve the efficiency and quality of construction.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of an apparatus according to an embodiment of the present application;
FIG. 2 is a schematic view of the construction of a diverting pulley and a traction sheave in an embodiment of the present application;
FIG. 3 is a schematic view of the connection structure of the traction wire according to the embodiment of the present application;
FIG. 4 is a schematic structural view of a strickling mechanism in an embodiment of the present application;
FIG. 5 is a schematic view of a portion of a strickle mechanism according to an embodiment of the present application;
FIG. 6 is a schematic view of the construction of a blade connection according to an embodiment of the present application; .
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Referring to fig. 1-6, embodiments of the present application provide a wall surface mortar screeding device 1 including a frame 10 and a screeding mechanism 20. The chassis 10 is used to carry parts of the apparatus 1. The frame 10 may include a movable roller 10 for moving, a handle 12 for pushing and pulling by a user, and a leg 13 for positioning after moving, and may also be provided with more structures according to the needs of the user, which is not described herein.
The frame 10 may have a chute 21, the chute 21 being vertically disposed. The number of the slide grooves 21 may be two, and the two slide grooves 21 are arranged in parallel. The two runners 21 may be connected via a support bar 22. The support bar 22 may be horizontally disposed. The number of the support rods 22 may be plural. Each support rod 22 is arranged in a vertical direction.
The slide slot 21 may have an inner slide slot 210 and an outer slide slot 211, the inner slide slot 210 being movably installed in the outer slide slot 211 up and down. The inner sliding groove 210 may be sleeved in the outer sliding groove 211 and may abut against the bottom of the outer sliding groove 211. At this time, optionally, a part of the support rods 22 connects the inner chutes 210 of the two chutes 21, and a part of the support rods 22 connects the outer chutes 211 of the two chutes 21. The arrangement ensures that the sliding groove 21 is telescopic, the height of the whole machine is reduced when the whole machine is not used, the moving and the transportation of the equipment 1 are facilitated, and meanwhile, the width of the whole machine is designed to be narrow, so that the passing performance of the whole machine is good, most doors on the market can be conveniently accessed, and the transportation of the equipment 1 is also facilitated.
The screeding mechanism 20 is used for screeding wall mortar. The strickle mechanism 20 is located on the frame 10. The striking-off mechanism 20 has a frame 21 for carrying the parts of the striking-off mechanism 20. The frame body 21 is mounted on the frame 10.
The screeding mechanism 20 has screeding blades 22 for screeding wall mortar and a drive structure 23 for driving the screeding blades 22 to rotate about an axis of rotation perpendicular to the wall surface, the screeding blades 22 being connected to the drive structure 23.
The screed 22 may be parallel to the wall surface. The squeegee 22 may be strip-shaped. The scraper 22 may be connected to the driving structure 23 at an intermediate position in its longitudinal direction.
The screed 22 has a blade 220 for screeding wall mortar. The wiper 220 can be perpendicular to the wall surface. The wiper 220 may have a bar shape. The length direction of the blade 220 may be the same as the length direction of the blade 22. The length of blade 220 may be equal to the length of blade 22. The squeegee 22 can be removably mounted to the squeegee 22, for example, the squeegee 220 can be bolted to the squeegee 22.
The screed 22 may have a water spray pipe 221 for spraying water to the wall mortar. The axis of the outlet of the spout 221 may be parallel to the wall surface. The spout 221 may be a bar. The water jet pipe 221 may have the same longitudinal direction as the blade 22. The length of the water jet 221 may be equal to half of the length of the flight 22. The number of outlets of the spout 221 may be plural. The outlet of each spout 221 may be disposed along the length of the spout 221.
Spout 221 may include a first spout 2210 and a second spout 2211. First spray 2210 and second spray 2211 may be positioned on either side of blade 220. And may be located on both sides of the middle of the squeegee 22. The spray pipe 221 may be detachably attached to the blade 22, for example, the spray pipe 221 may be fixed to the blade 22 by bolts.
The drive structure 23 may include a blade link 230, a first gear 231, a second gear 232, and a motor 233. The blade attachment 230 is connected to the blade 22. The squeegee connector 230 may have two catching protrusions 2310, and the two catching protrusions 2310 are caught at both sides of the squeegee 22, respectively. The squeegee connection 230 can have a receiving cavity with an outlet 2301 and an inlet 2302, the outlet 2301 communicating with the inlet of the water jet 221 and the axis of the inlet 2302 coinciding with the axis of rotation of the squeegee 22.
The drive structure 23 may further include a bearing housing 24 having a bearing 25, with the flight attachment 230 being supported on the frame 21 via the bearing 25.
The first gear 231 is connected to the flight coupler 230. The first gear 231 may have a first gear mounting hole, and the first gear 231 may be fitted over the exterior of the blade link 230 and coupled to the blade link 230 via a key and key groove 2303.
The second gear 232 is engaged with the first gear 231. The radius of the second gear 232 is smaller than the radius of the first gear 232. An output shaft of the motor 233 is connected to the second gear 232. The gear transmission is adopted, the structure is simple, the installation is convenient, the efficiency is high, and the use and the maintenance are simple and convenient.
The strike mechanism 20 may further include a water supply structure 26, the water supply structure 26 having a water supply chamber with a water outlet and a water supply port, the water outlet being rotatably and sealingly connected to the water inlet 2302, for example, the pipe section of the water inlet 2302 is disposed inside the pipe section of the water outlet, and the two pipe sections are sealingly connected by a sealing ring. The water supply port may have a water injection nozzle 260.
The strickle mechanism 20 may be mounted to the frame 10 so as to be movable up and down. The strike mechanism 20 may include a mounting roller 27, the mounting roller 27 being located in the chute 21 and being rollable along the chute 21. When the slide groove 21 includes the inner slide groove 210 and the outer slide groove 211, the mounting rollers 27 can roll in both the inner slide groove 210 and the outer slide groove 211. The mounting rollers 27 may be provided in two sets, and the two sets of mounting rollers 27 are respectively located in the two slide grooves 21. The number of the mounting rollers 27 per set may be plural, and the mounting rollers 27 are arranged in the vertical direction. The strike mechanism 20 may include a traction sheave 28.
The wall surface mortar screeding device 1 may include a driving mechanism 30 for driving the screeding mechanism 20 to move up and down, and the driving mechanism 30 is connected to the screeding mechanism 20.
The drive mechanism 30 may have a diverting pulley 31, a winding device 32 for winding and a traction rope 33. Diverting pulley 31 is located on the frame 10. The diverting pulleys may be located on the support bar 22. The number of diverting pulleys 31 may be plural, for example, a first diverting pulley 310, a second diverting pulley 311, a third diverting pulley 312, a fourth diverting pulley 313.
A winding device 32 is located on the frame 10, the winding device 32 may be a winch.
The pulling rope 33 is wound around the reversing pulley 31, and both ends of the pulling rope 33 are respectively connected with the strickle mechanism 20 and the winding device 32. The hauling rope 33 may be a steel rope. The pull cord 33 may be connected to the striking mechanism 20 via a traction sheave 28. Optionally, the traction rope 33 is passed around the first diverting pulley 310, the second diverting pulley 311, the third diverting pulley 312, the fourth diverting pulley 313, the traction sheave 28 in sequence and the traction rope 33 is knotted at the traction sheave 28. The traction rope 33 is adopted for traction and lifting, and the device has the advantages of simple structure, convenience in installation, high efficiency and simplicity and convenience in use and maintenance.
The utility model provides an equipment 1 during operation motor 233 rotates and drives second gear 232 rotatory, and second gear 232 is rotatory to drive first gear 231 rotatory, and first gear 231 is rotatory to drive scraper blade 22 rotatory, utilizes spray pipe 221 to adjust the dry wet condition of wall mortar. When the device works, the power supply is turned on, the working rotating speed and the starting time of the motor 233 and the winding device 32 are adjusted, the motor 233 drives the scraping plate 22 to scrape, the winding device 32 works to enable the scraping mechanism 20 to move longitudinally, and the device 1 can start to automatically scrape mortar by repeating the steps.
The device 1 of the present application has the following beneficial effects:
1. the rotary trowelling method is adopted, so that the speed is high, the wall friction is small, the wall construction quality is high, the mechanical structure load is low, and the service life is long.
2. Realize automatic direction and promotion, degree of automation is high, once fix a position and can realize scraping on a large scale the automation, and efficiency is that the manual several times of scraping of workman, the improvement wall efficiency of construction that can be very big, in addition, still has the advantage that construction quality is good.
3. The scraping plate 22 of the scraping mechanism 20 can adjust the wall surface humidity through water spraying according to the dry and wet condition of mortar while scraping, and the requirements of different working conditions are met.
4. The easily worn part scraping blade 220 and the water spraying pipe 221 are fixed by bolts, so that the replacement is convenient, the equipment 1 is convenient to maintain, the cost is low, and the service life is long.
5. Considering actual working conditions such as inconsistent process flow and previous process efficiency, the dry and wet degree of the wall surface mortar can influence the actual leveling effect, the humidity of the wall surface mortar is adjusted by adopting mechanisms such as a water spraying pipe 221 and the like, the wall surface leveling efficiency and quality are guaranteed, the loss of the equipment 1 is reduced, meanwhile, the requirement of the equipment 1 on the dry and wet degree of the wall surface mortar is not high, the requirements under different working conditions can be met by spraying water, and the application range is wide.
The construction method comprises the following steps:
1. the device 1 is pushed to the construction site, the device 1 is adjusted to a suitable distance from the wall surface, and the supporting legs 13 are put down to fix the position of the device 1.
2. The water pipe is connected with the water injection nozzle 260 of the strickling mechanism 20, the power supply is started, the working rotating speed and the starting time of the motor 233 are adjusted, the motor 233 is started, the scraper 22 rotates, and the device 1 starts mortar strickling.
3. And starting the winding device 32 according to the preset starting time, and longitudinally moving the scraping mechanism 20 until finishing the mortar scraping work of the whole longitudinal wall surface.
4. And (3) the field worker moves the equipment 1 transversely to the next longitudinal working point, and the operation is repeated until the mortar scraping work of the whole wall surface is completed.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it is to be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the above terms may be understood by those skilled in the art according to specific situations.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. The utility model provides a wall mortar strickles equipment off which characterized in that includes:
a frame; and
the scraping mechanism is provided with a scraping plate for scraping wall mortar and a driving mechanism for driving the scraping plate to rotate around a rotation axis perpendicular to the wall, and the scraping plate is connected with the driving mechanism.
2. A wall screed according to claim 1 wherein,
the scraper blade has the doctor-bar, the doctor-bar perpendicular to the wall, the doctor-bar detachably install in the scraper blade.
3. A wall screed according to claim 1 wherein,
the driving structure comprises a scraper connecting piece, a first gear, a second gear and a motor, wherein the scraper connecting piece is connected with the scraper, the first gear is connected with the scraper connecting piece, the second gear is meshed with the first gear, and an output shaft of the motor is connected with the second gear.
4. A wall screed according to claim 3 wherein,
the scraper is provided with a water spray pipe, and the axis of the outlet of the water spray pipe is parallel to the wall surface;
the scraper connecting piece is provided with an accommodating cavity, the accommodating cavity is provided with a water outlet and a water inlet, the water outlet is communicated with an inlet of the water spraying pipe, and the axis of the water inlet is superposed with the rotation axis of the scraper;
the strickle mechanism still includes water supply structure, water supply structure has the water supply chamber, the water supply chamber has outlet and supply water inlet, the outlet with the water inlet is rotationally sealed the intercommunication.
5. A wall screed according to claim 4 wherein,
the water spray pipes comprise a first water spray pipe and a second water spray pipe, and the first water spray pipe and the second water spray pipe are respectively positioned on two sides of the scraping blade.
6. A wall screed according to claim 4 wherein,
the spray pipe is detachably mounted to the blade.
7. A wall screed according to claim 1 wherein,
the strickle mechanism can be mounted on the frame in a way of moving up and down;
the wall surface mortar scraping equipment comprises a driving mechanism for driving the scraping mechanism to move up and down, and the driving mechanism is connected with the scraping mechanism.
8. A wall screed according to claim 7 wherein,
the rack is provided with a sliding chute which is vertically arranged;
the strickle mechanism includes the installation gyro wheel, the installation gyro wheel is located in the spout.
9. A wall screed according to claim 8 wherein,
the sliding groove is provided with an inner sliding groove and an outer sliding groove, and the inner sliding groove is mounted in the outer sliding groove in a vertically movable mode.
10. A wall screed according to claim 7 wherein,
the driving mechanism comprises a reversing pulley, a winding device and a traction rope, the winding device and the traction rope are used for winding, the reversing pulley and the winding device are both located on the rack, the traction rope is wound on the reversing pulley, and two ends of the traction rope are respectively connected with the scraping mechanism and the winding device.
CN202011222650.2A 2020-11-05 2020-11-05 Wall mortar strickles equipment off Pending CN112482702A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011222650.2A CN112482702A (en) 2020-11-05 2020-11-05 Wall mortar strickles equipment off

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011222650.2A CN112482702A (en) 2020-11-05 2020-11-05 Wall mortar strickles equipment off

Publications (1)

Publication Number Publication Date
CN112482702A true CN112482702A (en) 2021-03-12

Family

ID=74928255

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011222650.2A Pending CN112482702A (en) 2020-11-05 2020-11-05 Wall mortar strickles equipment off

Country Status (1)

Country Link
CN (1) CN112482702A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104533062A (en) * 2014-12-30 2015-04-22 王耀刚 Wall leveling machine
CN105317201A (en) * 2015-10-30 2016-02-10 武汉科技大学 Building surface spray painting robot
CN206873858U (en) * 2017-04-25 2018-01-12 浙江百施通网络科技有限公司 Multi-functional construction working platform and robot
US20180038119A1 (en) * 2015-05-26 2018-02-08 Foshan Tupo Machinery Manufacture Co.,Ltd. Plastering machine having foldable upright rail
CN111021681A (en) * 2019-12-25 2020-04-17 山东大学 Wall plastering machine and using method
CN211037716U (en) * 2019-07-29 2020-07-17 深圳市惠深博越智慧建造科技有限公司 Device for preventing mortar plastering from cracking
CN211114678U (en) * 2019-11-25 2020-07-28 重庆展尘科技有限公司 Full-automatic wall sanding machine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104533062A (en) * 2014-12-30 2015-04-22 王耀刚 Wall leveling machine
US20180038119A1 (en) * 2015-05-26 2018-02-08 Foshan Tupo Machinery Manufacture Co.,Ltd. Plastering machine having foldable upright rail
CN105317201A (en) * 2015-10-30 2016-02-10 武汉科技大学 Building surface spray painting robot
CN206873858U (en) * 2017-04-25 2018-01-12 浙江百施通网络科技有限公司 Multi-functional construction working platform and robot
CN211037716U (en) * 2019-07-29 2020-07-17 深圳市惠深博越智慧建造科技有限公司 Device for preventing mortar plastering from cracking
CN211114678U (en) * 2019-11-25 2020-07-28 重庆展尘科技有限公司 Full-automatic wall sanding machine
CN111021681A (en) * 2019-12-25 2020-04-17 山东大学 Wall plastering machine and using method

Similar Documents

Publication Publication Date Title
CN208380025U (en) A kind of construction mortar spraying device
CN109914758B (en) Automatic plastering robot for building
CN112376857A (en) Construction equipment for plastering building wall surface
CN114457981A (en) Uniform plastering device for interior wall of building decoration
CN113530047B (en) Curtain wall and construction method thereof
CN114687541A (en) Building construction spraying device
CN113898158A (en) Plastering device for building decoration and construction method thereof
CN112482702A (en) Wall mortar strickles equipment off
CN212053654U (en) Joint filling machine for building construction
CN210888019U (en) Hanging basket for building convenient to remove
CN210289177U (en) Building concrete shakeouts device
CN211037712U (en) Indoor wall building flour brush device
CN110397250B (en) Wall coating spraying device for building
CN2229487Y (en) Automatic plastering machine
CN209145301U (en) The levelling constructing device of small area
CN108532979B (en) Building glass curtain wall equipment
CN203296352U (en) Wall blade coating machine
CN113585675A (en) Automatic spraying plastering device
CN112517291A (en) Spraying device of high-altitude operation spraying robot
CN218205870U (en) Building curtain wall cleaning machine
CN114886342B (en) Cleaning equipment for building outer wall porcelain plate
CN219840337U (en) Wall painting equipment for house building decoration
CN217711568U (en) Spraying plastering unit of worker's civil engineering construction
CN220725667U (en) Cement paving device for paving floor tiles
CN215803356U (en) Automatic maintenance equipment for mass concrete maintenance

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20210312

RJ01 Rejection of invention patent application after publication