CN110778261A - Dustproof soundproof window for municipal building - Google Patents

Dustproof soundproof window for municipal building Download PDF

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Publication number
CN110778261A
CN110778261A CN201911065808.7A CN201911065808A CN110778261A CN 110778261 A CN110778261 A CN 110778261A CN 201911065808 A CN201911065808 A CN 201911065808A CN 110778261 A CN110778261 A CN 110778261A
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CN
China
Prior art keywords
frame body
framework
layer glass
soundproof
glass
Prior art date
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Granted
Application number
CN201911065808.7A
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Chinese (zh)
Other versions
CN110778261B (en
Inventor
刘婷婷
王宁
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.)
Power Intellectual Property Tianjin Co ltd
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Individual
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Priority to CN201911065808.7A priority Critical patent/CN110778261B/en
Publication of CN110778261A publication Critical patent/CN110778261A/en
Application granted granted Critical
Publication of CN110778261B publication Critical patent/CN110778261B/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
    • E06B5/20—Doors, windows, or like closures for special purposes; Border constructions therefor for insulation against noise
    • E06B5/205—Doors, windows, or like closures for special purposes; Border constructions therefor for insulation against noise windows therefor
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L1/00—Cleaning windows
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/54—Fixing of glass panes or like plates
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/663—Elements for spacing panes
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/67—Units comprising two or more parallel glass or like panes permanently secured together characterised by additional arrangements or devices for heat or sound insulation or for controlled passage of light
    • E06B3/6707—Units comprising two or more parallel glass or like panes permanently secured together characterised by additional arrangements or devices for heat or sound insulation or for controlled passage of light specially adapted for increased acoustical insulation
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/28—Other arrangements on doors or windows, e.g. door-plates, windows adapted to carry plants, hooks for window cleaners
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
    • E06B2007/023—Air flow induced by fan

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)

Abstract

The invention belongs to the field of building doors and windows, and particularly relates to a dustproof soundproof window for a municipal building, which comprises a frame body, wherein inner layer glass and outer layer glass are arranged in the frame body, the inner layer glass and the outer layer glass are fixedly connected through two reset springs, the inner side wall of the frame body is rotatably connected with a rotating rod, the other end of the rotating rod sequentially penetrates through the inner layer glass, the outer layer glass and the side wall of the frame body and extends out of the frame body, two threads with opposite spiral directions are arranged outside the rotating rod, the two threads with opposite spiral directions are respectively in threaded fit with the inner layer glass and the outer layer glass, one end of the rotating rod outside the frame body is coaxially and fixedly connected with a fan, and the inner side wall of the frame body. The dust-proof and noise-reducing device can achieve good dust-proof and noise-reducing effects, does not affect ventilation and heat dissipation of the dust-proof and noise-reducing device, and prevents charged dust from harming the bodies of indoor workers.

Description

Dustproof soundproof window for municipal building
Technical Field
The invention belongs to the technical field of building doors and windows, and particularly relates to a dustproof soundproof window for a municipal building.
Background
The municipal building refers to a public building constructed by government funding, generally refers to various buildings, structures and the like in a planning area, along with the rapid development of industrial production, production plants are distributed all over all corners in a city, charged dust and fibers flying out from factory buildings easily enter the municipal building along with air flow, the retention time of the charged dust in the air and in human bodies is longer, and the municipal building is easy to cause great harm to the health of municipal workers.
In order to guarantee indoor ventilation, can open the window for municipal building mostly, and when outdoor no wind, the ventilation effect of window for municipal building is limited, and in electrified dust or the window of spacing easy through opening got into municipal building, cause harm to staff's healthy, and the noisy sound in the city is great, in the noise can penetrate municipal building through the window, influence staff's operating condition and efficiency.
Therefore, we propose a dustproof soundproof window for municipal construction to solve the above problems.
Disclosure of Invention
The invention aims to solve the problem that dust and noise can enter a room through a municipal building window, and provides a dustproof soundproof window for municipal buildings, which can isolate the dust and the noise and does not influence the ventilation effect.
In order to achieve the purpose, the invention adopts the following technical scheme: a dustproof soundproof window for municipal buildings comprises a frame body, wherein inner-layer glass and outer-layer glass are arranged in the frame body, the inner-layer glass and the outer-layer glass are fixedly connected through two reset springs, a rotating rod is rotatably connected to the inner side wall of the frame body, the other end of the rotating rod sequentially penetrates through the side walls of the inner-layer glass, the outer-layer glass and the frame body and extends out of the frame body, two threads with opposite spiral directions are arranged outside the rotating rod and are respectively in threaded fit with the inner-layer glass and the outer-layer glass, one end of the rotating rod outside the frame body is fixedly connected with a fan, a rotating shaft is rotatably connected to the inner side wall of the frame body, a soundproof plate provided with a plurality of annular arrays is fixedly connected to the side wall of the rotating shaft, a sealing block is sleeved on the rotating rod, one side of the sealing block, which, the one end that the pivot was kept away from to the acoustic celotex board all offsets with the inside wall of framework and the cambered surface lateral wall of sealed piece and contacts.
In foretell dustproof soundproof window for municipal building, all fixedly connected with ring type seal on the inside wall of framework both sides, ring type seal is made by elastic rubber material.
In foretell dustproof soundproof window for municipal building, the acoustic celotex board is the damping acoustic celotex board, and the polylith the one end that the acoustic celotex board kept away from each other all fixes to inlay and is equipped with the short mane.
In foretell dustproof soundproof window for municipal building, fixedly connected with U-shaped magnet on the lateral wall of framework, the magnetic pole at U-shaped magnet both ends is opposite, the acoustic celotex board is made by conducting material, the hanging wall of the lateral wall of acoustic celotex board is equipped with the wire, two liang adjacent acoustic celotex board passes through the wire and forms closed circuit.
In the dustproof soundproof window for the municipal building, a collecting groove is formed in the inner bottom surface of the frame body, and the collecting groove is connected with the inner bottom surface of the frame body in a sliding manner.
Compared with the prior art, this municipal administration is dustproof soundproof window for building's advantage lies in:
1. according to the invention, by arranging the fan, when outdoor wind blows, the fan is driven to rotate, the rotating rod is driven to rotate, then the inner-layer glass and the outer-layer glass are driven to mutually approach, the municipal building window is opened, and the indoor ventilation effect is ensured.
2. According to the invention, by arranging the reset spring, when no wind exists outdoors, the reset spring bounces and resets to drive the inner layer glass and the outer layer glass to be away from each other, and the inner layer glass and the outer layer glass are abutted against the inner side wall of the frame body again to seal the municipal building window, so that charged dust is prevented from entering indoors and causing harm to the health of workers.
3. According to the invention, by arranging the plurality of sound insulation plates, when the municipal building window is in an open state, outdoor wind drives the sound insulation plates to rotate directionally, and in the rotating process, the edges of the sound insulation plates periodically sweep the inner side wall of the frame body and the cambered side wall of the sealing block, and in the sweeping process, the sound insulation plates are always in contact with the cambered side wall of the sealing block on the inner side wall of the frame body, so that in the sweeping process of the sound insulation plates, the outside air is not directly communicated with the indoor space, and the sound insulation effect is ensured.
4. According to the invention, the U-shaped magnet is arranged, when the sound insulation boards rotate around the rotating shaft, the wire is driven to rotate, according to the electromagnetic induction law, when the magnetic flux in a closed loop formed by the wire changes, induced current is generated in the wire, and induced electromotive force is generated between two adjacent sound insulation boards, when the municipal building window is opened, the sound insulation boards can adsorb charged dust entering along with air flow, so that the dust is prevented from entering the room, and the health of indoor workers is further ensured.
5. According to the invention, when the outdoor air is in a no-wind state, the induced electromotive force on the sound insulation plate disappears, so that the dust adsorbed on the surface of the sound insulation plate falls into the collecting groove at the bottom of the frame body, and the collecting groove can be taken out of the frame body regularly for cleaning, thereby realizing the collection and treatment of the dust.
Drawings
FIG. 1 is a schematic view of a top view of the dustproof and soundproof window for municipal construction according to embodiment 1 of the present invention;
FIG. 2 is a schematic view of a closed top structure of the dust-proof and sound-proof window for municipal buildings according to the embodiment 1 of the present invention;
FIG. 3 is a schematic top view of the embodiment 2 of the dustproof and soundproof window for municipal construction according to the present invention;
FIG. 4 is a schematic side view of the dustproof soundproof window for municipal construction according to embodiment 2 of the present invention.
In the figure, 1 frame body, 2 inner layer glass, 3 outer layer glass, 4 return springs, 5 rotating rods, 6 fans, 7 rotating shafts, 8 sound insulation boards, 9 annular sealing rings, 10U-shaped magnets, 11 conducting wires, 12 collecting grooves and 13 sealing blocks.
Detailed Description
The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.
Example 1
As shown in fig. 1-2, a dustproof soundproof window for municipal building, including framework 1, be equipped with inlayer glass 2 and outer glass 3 in the framework 1, it should be noted that, equal fixedly connected with ring packing 9 on the inside wall of framework 1 both sides, ring packing 9 is made by elastic rubber material, has guaranteed the leakproofness of municipal building window to striking framework 1 when preventing that inlayer glass 2 and outer glass 3 from removing and causing the damage, through two reset spring 4 fixed connection between inlayer glass 2 and the outer glass 3.
In this embodiment, it is connected with dwang 5 to rotate on the inside wall of framework 1, and the other end of dwang 5 runs through inlayer glass 2 in proper order, outer glass 3 and the lateral wall of framework 1 and extends to the outer setting of framework 1, and dwang 5 is equipped with two opposite screw threads of spiral direction outward, and two opposite screw threads of spiral direction respectively with inlayer glass 2 and outer glass 3 screw-thread fit, and the coaxial fixedly connected with fan 6 of dwang 5 one end outside framework 1.
In this embodiment, it is connected with pivot 7 to rotate on framework 1's the inside wall, the acoustic celotex board 8 that fixedly connected with polylith annular array set up on pivot 7's the lateral wall, it is required to explain, acoustic celotex board 8 is the damping acoustic celotex board, good syllable-dividing effect has, and the one end that polylith acoustic celotex board 8 kept away from each other is all fixed to be inlayed and is equipped with the short mane, the sealed effect between acoustic celotex board 8 and the framework 1 inside wall can be guaranteed to the broken mane, and can reduce the friction between acoustic celotex board 8 and the framework 1 inside wall, play the lubrication action, sealed piece 13 has been cup jointed to dwang 5 external fixation, sealed piece 13 is the cambered surface shape setting near one side of acoustic celotex board 8, the one end that pivot 7 was.
The working principle of the embodiment is as follows: when outdoor wind blows, drive fan 6 and rotate, then drive dwang 5 and rotate, drive inlayer glass 2 and outer glass 3 next to each other then, open the municipal building window, guaranteed indoor ventilation effect, the air current is as shown by the arrow in figure 1.
When outdoor no wind, reset spring 4 bounces and resets, drives inlayer glass 2 and outer glass 3 and keeps away from each other, and inlayer glass 2 and outer glass 3 offset the contact with the inside wall of framework 1 once more, as shown in fig. 2, seal the municipal building window, prevent that electrified dust from getting into indoorly, cause harm to staff's health.
When the municipal building window is in the open mode, 8 directional rotations of acoustic celotex board are driven to outdoor wind, at rotatory in-process, 8 marginal periodic sweeping of acoustic celotex board sweeps the inside wall of framework 1 and the cambered surface lateral wall of sealed piece 13, sweeping the in-process, there is acoustic celotex board 8 and framework 1's inside wall and sealed piece 13's cambered surface lateral wall contact all the time, consequently sweep at acoustic celotex board 8 and sweep the in-process, external air is not with indoor direct intercommunication, thereby the sound insulation effect has been guaranteed.
Example 2
As shown in fig. 3 to 4, the present embodiment is different from embodiment 1 in that: fixedly connected with U-shaped magnet 10 on the lateral wall of framework 1, the magnetic pole at U-shaped magnet 10 both ends is opposite, and acoustic celotex board 8 is made by conducting material, and the hanging wall of acoustic celotex board 8 is equipped with wire 11, and two liang of adjacent acoustic celotex boards 8 pass through wire 11 and form closed loop, and it is worth mentioning that, the interior bottom surface of framework 1 is equipped with collecting vat 12, and collecting vat 12 and framework 1's interior bottom surface sliding connection are convenient for collect and handle the dust.
In this embodiment, when polylith acoustic celotex board 8 is rotatory around pivot 7, drive wire 11 and rotate, can know according to the electromagnetic induction law, when magnetic flux changes in the closed circuit that wire 11 formed, produce induced-current in the wire 11, make then to produce induced electromotive force between two adjacent acoustic celotex boards 8, when municipal building window is opened, acoustic celotex board 8 can be with the electrified dust absorption that gets into along with the air current, prevent that it from getting into indoorly, further guaranteed indoor staff's healthy.
When being in the windless state outdoors, the induced electromotive force on the acoustic celotex board 8 disappears, then the dust that acoustic celotex board 8 surface adsorption drops to the collecting vat 12 of framework 1 bottom in, can take out framework external washing with collecting vat 12 regularly, realizes the collection and the processing to the dust.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (5)

1. The utility model provides a dustproof soundproof window for municipal building, includes framework (1), its characterized in that, be equipped with inlayer glass (2) and outer glass (3) in framework (1), through two reset spring (4) fixed connection between inlayer glass (2) and outer glass (3), it is connected with dwang (5) to rotate on the inside wall of framework (1), the other end of dwang (5) runs through the lateral wall of inlayer glass (2), outer glass (3) and framework (1) in proper order and extends to framework (1) and sets up outward, dwang (5) are equipped with two opposite spiral direction's screw thread outward, two opposite spiral direction's screw thread respectively with inlayer glass (2) and outer glass (3) screw-thread fit, dwang (5) are at the coaxial fixedly connected with fan (6) of the outer one end of framework (1), rotate on the inside wall of framework (1) and be connected with pivot (7), on the lateral wall of pivot (7) acoustic celotex board (8) that fixedly connected with polylith annular array set up, dwang (5) outer fixed cover has sealed piece (13), one side that sealed piece (13) are close to acoustic celotex board (8) is the setting of cambered surface shape, the equal offset contact of the cambered surface lateral wall of the one end of pivot (7) and the inside wall of framework (1) and sealed piece (13) is kept away from in acoustic celotex board (8).
2. The dustproof soundproof window for municipal building according to claim 1, wherein the inner side walls of both sides of the frame body (1) are fixedly connected with annular seal rings (9), and the annular seal rings (9) are made of elastic rubber material.
3. The dustproof soundproof window for municipal construction according to claim 1, wherein the soundproof panel (8) is a damping soundproof panel, and short bristles are fixedly embedded in the ends of the plurality of soundproof panels (8) away from each other.
4. The dustproof soundproof window for municipal building according to claim 1, wherein a U-shaped magnet (10) is fixedly connected to the side wall of the frame body (1), the magnetic poles at the two ends of the U-shaped magnet (10) are opposite, the soundproof plates (8) are made of a conductive material, a wire (11) is wound on the side wall of each soundproof plate (8), and every two adjacent soundproof plates (8) form a closed loop through the wire (11).
5. The dustproof soundproof window for municipal building according to claim 1, wherein the inner bottom surface of the frame body (1) is provided with a collecting groove (12), and the collecting groove (12) is slidably connected to the inner bottom surface of the frame body (1).
CN201911065808.7A 2019-11-04 2019-11-04 Dustproof soundproof window for municipal building Active CN110778261B (en)

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CN201911065808.7A CN110778261B (en) 2019-11-04 2019-11-04 Dustproof soundproof window for municipal building

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Application Number Priority Date Filing Date Title
CN201911065808.7A CN110778261B (en) 2019-11-04 2019-11-04 Dustproof soundproof window for municipal building

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CN110778261B CN110778261B (en) 2020-08-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111502508A (en) * 2020-05-06 2020-08-07 李静 Intelligence house is with ventilation window that gives sound insulation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2416216Y (en) * 1999-12-17 2001-01-24 梁华土 Sound-proofing ventilating window
JP2009167643A (en) * 2008-01-11 2009-07-30 Inax Corp Door for bathroom
CN207194723U (en) * 2017-08-23 2018-04-06 重庆瑞明节能门窗有限公司 A kind of energy-saving mute aluminum alloy casement window
CN207776744U (en) * 2018-01-12 2018-08-28 安徽省金鹏节能科技有限公司 A kind of aluminum alloy energy-saving window with slit ventilation function
CN208363998U (en) * 2018-06-01 2019-01-11 广州市安逸新型材料有限公司 A kind of sound insulation window construction

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2416216Y (en) * 1999-12-17 2001-01-24 梁华土 Sound-proofing ventilating window
JP2009167643A (en) * 2008-01-11 2009-07-30 Inax Corp Door for bathroom
CN207194723U (en) * 2017-08-23 2018-04-06 重庆瑞明节能门窗有限公司 A kind of energy-saving mute aluminum alloy casement window
CN207776744U (en) * 2018-01-12 2018-08-28 安徽省金鹏节能科技有限公司 A kind of aluminum alloy energy-saving window with slit ventilation function
CN208363998U (en) * 2018-06-01 2019-01-11 广州市安逸新型材料有限公司 A kind of sound insulation window construction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111502508A (en) * 2020-05-06 2020-08-07 李静 Intelligence house is with ventilation window that gives sound insulation

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Inventor after: Pei Yingke

Inventor after: Li Zhehao

Inventor after: Liu Tingting

Inventor after: Wang Ning

Inventor before: Liu Tingting

Inventor before: Wang Ning

TA01 Transfer of patent application right
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Effective date of registration: 20200716

Address after: 310000 No.100 Yandang West Road, Longwan District, Wenzhou City, Zhejiang Province

Applicant after: Pei Yingke

Address before: 450000 No. 100 science Avenue, hi tech Zone, Henan, Zhengzhou

Applicant before: Liu Tingting

GR01 Patent grant
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Effective date of registration: 20210305

Address after: 102200 423, 4 / F, block a, Xinhua future city building, 175 Litang Road, Changping District, Beijing

Patentee after: Li Qiannan

Address before: 310000 No.100 Yandang West Road, Longwan District, Wenzhou City, Zhejiang Province

Patentee before: Pei Yingke

TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20220211

Address after: 300300 No. 2002, building 4, block B, No. 6, Huafeng Road, Huaming high tech Industrial Zone, Dongli District, Tianjin

Patentee after: Power intellectual property (Tianjin) Co.,Ltd.

Address before: 102200 423, 4 / F, block a, Xinhua future city building, 175 Litang Road, Changping District, Beijing

Patentee before: Li Qiannan

EE01 Entry into force of recordation of patent licensing contract
EE01 Entry into force of recordation of patent licensing contract

Application publication date: 20200211

Assignee: SICHUAN YAOSHUN CONSTRUCTION GROUP Co.,Ltd.

Assignor: Power intellectual property (Tianjin) Co.,Ltd.

Contract record no.: X2022980012406

Denomination of invention: A dustproof and soundproof window for municipal buildings

Granted publication date: 20200811

License type: Common License

Record date: 20220812