CN108005554A - Hoisting type electromagnetic shield door with foolproof apparatus - Google Patents
Hoisting type electromagnetic shield door with foolproof apparatus Download PDFInfo
- Publication number
- CN108005554A CN108005554A CN201711460018.XA CN201711460018A CN108005554A CN 108005554 A CN108005554 A CN 108005554A CN 201711460018 A CN201711460018 A CN 201711460018A CN 108005554 A CN108005554 A CN 108005554A
- Authority
- CN
- China
- Prior art keywords
- component
- gliding mass
- columns assemblies
- lift cylinder
- door leaf
- 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.)
- Granted
Links
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
- E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
- E06B5/18—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes against harmful radiation
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D13/00—Accessories for sliding or lifting wings, e.g. pulleys, safety catches
- E05D13/003—Anti-dropping devices
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D15/00—Suspension arrangements for wings
- E05D15/16—Suspension arrangements for wings for wings sliding vertically more or less in their own plane
- E05D15/165—Details, e.g. sliding or rolling guides
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/50—Power-operated mechanisms for wings using fluid-pressure actuators
- E05F15/57—Power-operated mechanisms for wings using fluid-pressure actuators for vertically-sliding wings
-
- 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
- E06B3/32—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing
- E06B3/34—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing with only one kind of movement
- E06B3/42—Sliding wings; Details of frames with respect to guiding
- E06B3/44—Vertically-sliding wings
- E06B3/4407—Single-hung, i.e. having a single vertical sliding panel
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Power-Operated Mechanisms For Wings (AREA)
- Platform Screen Doors And Railroad Systems (AREA)
Abstract
The invention discloses a kind of hoisting type electromagnetic shield door with foolproof apparatus, including frame members, door leaf component, longitudinal feed mechanism and hoisting mechanism, frame members cooperate with door leaf component and realize locking and the opening of door leaf component, the door leaf component is installed on longitudinal feed mechanism, door leaf component is driven to carry out translation motion by longitudinal feed mechanism, the hoisting mechanism includes columns assemblies, and can be with respect to the gliding mass component that columns assemblies slide up and down, the longitudinal feed mechanism is installed on the gliding mass component, longitudinal feed mechanism is driven to carry out lifting action with door leaf component by gliding mass component.The present invention has abandoned the structure of steel wire rope control lifting, and using columns assemblies and the matched hoisting mechanism of gliding mass component, foolproof apparatus is installed in columns assemblies, makes to form mechanical lock when having a power failure, prevents shield door tenesmus.
Description
Technical field
The present invention relates to a kind of hoisting type electromagnetic shield door with foolproof apparatus, belong to electromangnetic spectrum field.
Background technology
In recent years, as country forces electronic information electrical industry Electromagnetic Compatibility the implementation of standard, darkroom, emulation
Technology is used widely.The testee size of such system requirements is increasing, small to arrive computer, greatly to aerospace
Device, therefore door required by shield engineering will also maximize, and because needing to paste absorbing material on the inside of door, it is desirable to more one is vertical when door translates
To feed motion.To meet requirements above, there is guide rail suspension type translation shield door.But some users are due to by plane space
Place restrictions on, translation can not be realized, therefore propose the requirement being lifted up.
Existing hoisting type electromagnetic shield door mainly drives the structure of steel wire rope control lifting using motor.But steel wire rope is deposited
The easily stranded, abrasion the problem of, and when shield door rises or hovers there are wire cable rupture after the peace that rapidly drops of shield door
Full hidden danger.In addition, when motor breaks down or has a power failure, the shield door in lifting state can not then decline, after influencing
The progress of continuous work.
The content of the invention
The technical problems to be solved by the invention are：A kind of the defects of overcoming the prior art, there is provided band foolproof apparatus
Hoisting type electromagnetic shield door, its abandoned steel wire rope control lifting structure, eliminate failure or have a power failure when tenesmus it is hidden
Suffer from, occupy little space, lifting amplitude is big, safe for operation and easy to repair.
In order to solve the above-mentioned technical problem, the technical scheme is that：A kind of hoisting type electricity with foolproof apparatus
Magnetic screen door, including frame members, door leaf component, longitudinal feed mechanism and hoisting mechanism, frame members and door leaf component are mutual
Coordinate locking and the opening for realizing door leaf component, the door leaf component is installed on longitudinal feed mechanism, by longitudinal feed mechanism
Door leaf component is driven to carry out translation motion, the hoisting mechanism includes columns assemblies, and can be slided up and down with respect to columns assemblies
Gliding mass component, the longitudinal feed mechanism be installed on the gliding mass component on, by gliding mass component drive longitudinal feed mechanism with
Door leaf component carries out lifting action.
Further, column cavity is provided with the columns assemblies, gliding mass component is installed in the column cavity simultaneously
It can be slided up and down along the column cavity, the hoisting mechanism further includes lift cylinder, and the gliding mass component is by lift cylinder band
Dynamic lifting.
Further, the lift cylinder is fixed in corresponding columns assemblies, and sprocket wheel is housed on the piston rod of lift cylinder,
The hoisting mechanism further includes flyer chain, and the flyer chain coordinates with sprocket wheel, also, one end of the flyer chain is fixed
It is connected in columns assemblies, the other end of the flyer chain is connected with gliding mass component, the lift cylinder, sprocket wheel and leaf chain
Bar is collectively forming movable pulley structure, completes lifting action so that the ratio between the stroke of the lift cylinder and gliding mass component stroke are
1：2.
Further, multiple square card slots are provided with the gliding mass component from top to bottom, are provided with the columns assemblies
Full self-locking device, the foolproof apparatus include latch segment, torsional spring, shaft, connecting rod and electromagnet, and the electromagnet passes through peace
Dress stent is fixedly connected in columns assemblies, and the latch segment is installed in columns assemblies by shaft, and latch segment can be around
Shaft does rotary motion, and the torsional spring is installed in shaft, and the latch segment is connected with electromagnet by connecting rod；When the cunning
When body component hovers, the electromagnet no power, the latch segment is inserted into square card slot all the time by the active force of torsional spring, is formed
Mechanical lock.
Further, the columns assemblies include left column component and right column component, the left column component and right column
Connected between component by a crossbeam, each in left and right columns assemblies to set a slide assemblies, each slide assemblies are by corresponding institute
State movable pulley structure and drive completion lifting action, foolproof apparatus, latch segment insertion pair are both provided with left and right columns assemblies
Answer in the square card slot of slide assemblies.
Further, the hoisting type electromagnetic shield door with foolproof apparatus further includes provides power for lift cylinder
Hydraulic station, hydraulic station drive the lift cylinder synchronization lifting on left column component and right column component.
Further, unloading valve is also equipped with the oil return section for the hydraulic path that the hydraulic station and lift cylinder are formed,
To lift cylinder release, to decline lift cylinder manually.
After employing above-mentioned technical proposal, the invention has the advantages that：
1) present invention has abandoned the structure of steel wire rope control lifting, using columns assemblies and the matched lifting of gliding mass component
Mechanism, gliding mass component lifting carriage in columns assemblies so that by gliding mass component drive longitudinal feed mechanism and door leaf component into
Row lifting action；
2) gliding mass component is collectively forming the drive completion lifting of movable pulley structure by lift cylinder, sprocket wheel and flyer chain and moves
Make, employ movable pulley structure, the lifting amplitude of gliding mass component is big；
3) foolproof apparatus is installed on gliding mass component, when gliding mass component hovers, electromagnet no power, latch segment by
The active force of torsional spring is inserted into square card slot all the time, forms mechanical lock, prevents that tenesmus situation occurs when shield door from hovering；Work as gliding mass
When component rises, electromagnet no power, gliding mass component oppresses latch segment upwards, latch segment is turned round upwards, until latch segment takes off
Go out square card slot, latch segment is inserted into next square card slot under the active force of torsional spring so that when shield door is rising
Eliminate the risk of tenesmus；When gliding mass component declines, electromagnet, which is powered, to be shunk, and electromagnet pulls downward on connecting rod, and latch segment exists
Deviate under the pulling of connecting rod out of square card slot, when electromagnet is powered, latch segment departs from square card slot all the time；
4) power is provided for lift cylinder by hydraulic station, ensures that the lift cylinder in left and right columns assemblies can synchronously rise
Drop, installs unloading valve so that also door leaf component can be made to drop to extreme lower position when having a power failure, be easy in the oil return section of hydraulic path
Maintenance or other work.
Brief description of the drawings
Fig. 1 is the structure chart of the hoisting type electromagnetic shield door with foolproof apparatus of the present invention；
Fig. 2 is the hoisting mechanism structure chart (being partial sectional view at square frame) of the present invention；
Fig. 3 is the structure chart of the foolproof apparatus of the present invention；
In figure, 1, frame members, 2, door leaf component, 3, longitudinal feed mechanism, 4, hoisting mechanism, 5, left column component, 6,
Right column component, 7, crossbeam, 8, column cavity, 9, lift cylinder, 10, gliding mass component, 11, flyer chain, 12, hydraulic station, 13,
Foolproof apparatus, 14, latch segment, 15, torsional spring, 16, electromagnet, 17, square card slot, 18, connecting rod, 19, shaft, 20, installation
Stent.
Embodiment
In order that the present invention can be more clearly and readily understood, it is right below according to specific embodiment and with reference to attached drawing
The present invention is described in further detail.
As shown in Figure 1, a kind of hoisting type electromagnetic shield door with foolproof apparatus, including frame members 1, door leaf component
2nd, longitudinal feed mechanism 3 and hoisting mechanism 4, frame members 1 and door leaf component 2 cooperate realize the locking of door leaf component 2 with
Open, the door leaf component 2 is installed on longitudinal feed mechanism 3, drives door leaf component 2 to be translated by longitudinal feed mechanism 3
Action, the hoisting mechanism 4 include columns assemblies, and can be described vertical with respect to the gliding mass component 10 that columns assemblies slide up and down
Be installed on to feed mechanism 3 on the gliding mass component 10, by gliding mass component 10 drive longitudinal feed mechanism 3 and door leaf component 2 into
Row lifting action.
Preferably, as shown in the figure, being provided with column cavity 8 in the columns assemblies, gliding mass component 10 is installed on described
It can slide up and down in column cavity 8 and along the column cavity 8, the hoisting mechanism 4 further includes lift cylinder 9, the gliding mass
Component 10 drives lifting by lift cylinder 9.
Preferably, as shown in the figure, the lift cylinder 9 is fixed in corresponding columns assemblies, the piston rod of lift cylinder 9
Upper that sprocket wheel is housed, the hoisting mechanism 4 further includes flyer chain 11, and the flyer chain 11 coordinates with sprocket wheel, also, the plate
One end of formula chain 11 is fixedly connected in columns assemblies, and the other end of the flyer chain 11 is connected with gliding mass component 10, institute
State lift cylinder 9, sprocket wheel and flyer chain 11 and be collectively forming movable pulley structure, complete lifting action so that the lift cylinder 9
Stroke and the ratio between 10 stroke of gliding mass component be 1：2.
Preferably, as shown in the figure, being provided with multiple square card slots 17 on the gliding mass component 10 from top to bottom, the column group
Foolproof apparatus 13 is also equipped with part, the foolproof apparatus 13 includes latch segment 14, torsional spring 15, shaft 19, connecting rod
18 and electromagnet 16, the electromagnet 16 be fixedly connected on by mounting bracket 20 in columns assemblies, the latch segment 14 passes through
Shaft 19 is installed in columns assemblies, and latch segment 14 19 can do rotary motion around the shaft, and the torsional spring 15 is installed on shaft
On 19, the latch segment 14 is connected with electromagnet 16 by connecting rod 18；When the gliding mass component 10 hovers, the electromagnet
16 no powers, the latch segment 14 are inserted into square card slot 17 all the time by the active force of torsional spring 15, form mechanical lock.
Preferably, as shown in the figure, the columns assemblies include left column component 5 and right column component 6, the left column group
Connected between part 5 and right column component 6 by a crossbeam 7, a slide assemblies 10 are respectively set in left and right columns assemblies, it is each sliding
Dynamic component 10 is driven by the corresponding movable pulley structure and completes lifting action, and safety is both provided with left and right columns assemblies certainly
Locking device 13, the insertion of latch segment 14 are corresponded in the square card slot 17 of slide assemblies 10.The solid component of the present embodiment is using left vertical
The structure of column assembly 5 and right column component 6, adds the reliability of the lifting of door leaf component 2, door leaf component 2 is by the cunning of left and right two
Dynamic component 10 drives lifting jointly.
Preferably, as shown in the figure, the hoisting type electromagnetic shield door with foolproof apparatus is further included as lift cylinder 9
The hydraulic station 12 of power is provided, hydraulic station 12 drives 9 synchronization lifting of lift cylinder on left column component 5 and right column component 6.
Preferably, as shown in the figure, also pacifying in the oil return section for the hydraulic path that the hydraulic station 12 is formed with lift cylinder 9
Equipped with unloading valve, to 9 release of lift cylinder, to decline lift cylinder 9 manually.
The present invention has abandoned the structure of steel wire rope control lifting, using the 10 matched lifting of columns assemblies and gliding mass component
Mechanism, the lifting carriage in columns assemblies of gliding mass component 10, so as to drive longitudinal feed mechanism 3 and door leaf group by gliding mass component 10
Part 2 carries out lifting action.
Gliding mass component 10 is collectively forming movable pulley structure by lift cylinder 9, sprocket wheel and flyer chain 11 and drives completion lifting
Action, employs movable pulley structure, the lifting amplitude of gliding mass component is big.
Foolproof apparatus is installed in columns assemblies, when gliding mass component 10 hovers, 16 no power of electromagnet, latch segment
14 are inserted into square card slot 17 all the time by the active force of torsional spring 15, form mechanical lock, prevent that tenesmus feelings occur when shield door from hovering
Condition；When gliding mass component 10 rises, 16 no power of electromagnet, gliding mass component 10 oppresses latch segment 14 upwards, make latch segment 14 to
Upper rotary, until latch segment 14 deviates from square card slot 17, latch segment 14 is inserted into next square card under the active force of torsional spring 15
In groove 17 so that the risk of tenesmus is also eliminated when shield door is rising；When gliding mass component 10 declines, electromagnet 16 is powered
Shrink, electromagnet 16 pulls downward on connecting rod 18, the abjection out of square card slot 17 under the pulling of connecting rod 18 of latch segment 14, in electromagnetism
When iron 16 is powered, latch segment 14 departs from square card slot 17 all the time.
Power is provided for lift cylinder by hydraulic station 12, ensures that the lift cylinder 9 in left and right columns assemblies can synchronously rise
Drop, installs unloading valve so that also door leaf component can be made to drop to extreme lower position when having a power failure, be easy in the oil return section of hydraulic path
Maintenance or other work.
Particular embodiments described above, pair present invention solves the technical problem that, technical solution and beneficial effect carry out
It is further described, it should be understood that the foregoing is merely the specific embodiment of the present invention, is not limited to this
Invention, within the spirit and principles of the invention, any modification, equivalent substitution, improvement and etc. done, should be included in this hair
Within bright protection domain.
Claims (7)
- A kind of 1. hoisting type electromagnetic shield door with foolproof apparatus, it is characterised in that：Including frame members (1), door leaf group Part (2), longitudinal feed mechanism (3) and hoisting mechanism (4), frame members (1) cooperate with door leaf component (2) and realize door leaf group The locking of part (2) and opening, the door leaf component (2) is installed on longitudinal feed mechanism (3), by longitudinal feed mechanism (3) band Dynamic door leaf component (2) carries out translation motion, and the hoisting mechanism (4) includes columns assemblies, and can be with respect to columns assemblies above and below The gliding mass component (10) of slip, the longitudinal feed mechanism (3) is installed on the gliding mass component (10), by gliding mass component (10) Longitudinal feed mechanism (3) is driven to carry out lifting action with door leaf component (2).
- 2. the hoisting type electromagnetic shield door according to claim 1 with foolproof apparatus, it is characterised in that：Described is vertical Column cavity (8) is provided with column assembly, gliding mass component (10) is installed in the column cavity (8) and can be along the column chamber Body (8) slides up and down, and the hoisting mechanism (4) further includes lift cylinder (9), and the gliding mass component (10) is by lift cylinder (9) Drive lifting.
- 3. the hoisting type electromagnetic shield door according to claim 2 with foolproof apparatus, it is characterised in that：The lifting Oil cylinder (9) is fixed in corresponding columns assemblies, and sprocket wheel is housed on the piston rod of lift cylinder (9), and the hoisting mechanism 4 also wraps Rubbing board type chain (11), the flyer chain (11) coordinates with sprocket wheel, also, one end of the flyer chain (11) is fixedly connected In columns assemblies, the other end of the flyer chain (11) is connected with gliding mass component (10), the lift cylinder (9), sprocket wheel Movable pulley structure is collectively forming with flyer chain (11), completes lifting action so that the stroke and gliding mass of the lift cylinder (9) The ratio between 10 stroke of component is 1：2.
- 4. the hoisting type electromagnetic shield door according to claim 3 with foolproof apparatus, it is characterised in that：The gliding mass Multiple square card slots (17) are provided with component (10) from top to bottom, foolproof apparatus is also equipped with the columns assemblies (13), the foolproof apparatus (13) includes latch segment (14), torsional spring (15), shaft (19), connecting rod (18) and electromagnet (16), the electromagnet (16) is fixedly connected in columns assemblies by mounting bracket (20), and the latch segment (14) is by turning Axis (19) is installed in columns assemblies, and latch segment (14) (19) can do rotary motion, torsional spring (15) installation around the shaft In shaft (19), the latch segment (14) is connected with electromagnet (16) by connecting rod (18)；When the gliding mass component (10) During hovering, electromagnet (16) no power, the latch segment (14) is inserted into square card slot all the time by the active force of torsional spring (15) (17) in, mechanical lock is formed.
- 5. the hoisting type electromagnetic shield door according to claim 4 with foolproof apparatus, it is characterised in that：The column Component includes left column component (5) and right column component (6), passes through between the left column component (5) and right column component (6) One crossbeam (7) connects, and each in left and right columns assemblies to set a slide assemblies (10), each slide assemblies (10) are by corresponding institute State movable pulley structure and drive completion lifting action, foolproof apparatus (13), latch segment are both provided with left and right columns assemblies (14) it is inserted into the square card slot (17) of corresponding slide assemblies (10).
- 6. the hoisting type electromagnetic shield door according to claim 5 with foolproof apparatus, it is characterised in that：The band peace The hoisting type electromagnetic shield door of full self-locking device further includes the hydraulic station (12) that power is provided for lift cylinder (9), hydraulic station (12) lift cylinder (9) synchronization lifting on left column component (5) and right column component (6) is driven.
- 7. the hoisting type electromagnetic shield door according to claim 6 with foolproof apparatus, it is characterised in that：In the liquid Unloading valve is also equipped with the oil return section for the hydraulic path that pressure station (12) is formed with lift cylinder (9), so as to manually to lifting oil Cylinder (9) release, declines lift cylinder (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711460018.XA CN108005554B (en) | 2017-12-28 | 2017-12-28 | Lifting type electromagnetic shielding door with safety self-locking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711460018.XA CN108005554B (en) | 2017-12-28 | 2017-12-28 | Lifting type electromagnetic shielding door with safety self-locking device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108005554A true CN108005554A (en) | 2018-05-08 |
| CN108005554B CN108005554B (en) | 2023-02-28 |
Family
ID=62062053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711460018.XA Active CN108005554B (en) | 2017-12-28 | 2017-12-28 | Lifting type electromagnetic shielding door with safety self-locking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108005554B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661479A (en) * | 2018-08-23 | 2018-10-16 | 长春福然德部件加工有限公司 | Overhead door anti-fall device |
| US20200037525A1 (en) * | 2018-07-31 | 2020-02-06 | Mjnn, Llc | Opening Apparatus for Use With a Multi-Piece, Hinged, Hydroponic Tower |
| US11723328B2 (en) | 2019-05-08 | 2023-08-15 | Mjnn Llc | Cleaning apparatus for use with a plant support tower |
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| CN202207653U (en) * | 2011-08-26 | 2012-05-02 | 上海洲泰轻工机械制造有限公司 | Observation window opening and closing mechanism for combination machine |
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| CN206600105U (en) * | 2016-12-21 | 2017-10-31 | 纪和机械制造(上海)有限公司 | Automatically-controlled door |
| CN208073312U (en) * | 2017-12-28 | 2018-11-09 | 常州雷宁电磁屏蔽设备有限公司 | Hoisting type electromagnetic shield door with foolproof apparatus |
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2017
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090060526A (en) * | 2007-12-10 | 2009-06-15 | 두산인프라코어 주식회사 | Apparatus for opening and closing autodoor |
| CN202207653U (en) * | 2011-08-26 | 2012-05-02 | 上海洲泰轻工机械制造有限公司 | Observation window opening and closing mechanism for combination machine |
| CN206600105U (en) * | 2016-12-21 | 2017-10-31 | 纪和机械制造(上海)有限公司 | Automatically-controlled door |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200037525A1 (en) * | 2018-07-31 | 2020-02-06 | Mjnn, Llc | Opening Apparatus for Use With a Multi-Piece, Hinged, Hydroponic Tower |
| US11951610B2 (en) * | 2018-07-31 | 2024-04-09 | Mjnn Llc | Opening apparatus for use with a multi-piece, hinged, hydroponic tower |
| CN108661479A (en) * | 2018-08-23 | 2018-10-16 | 长春福然德部件加工有限公司 | Overhead door anti-fall device |
| US11723328B2 (en) | 2019-05-08 | 2023-08-15 | Mjnn Llc | Cleaning apparatus for use with a plant support tower |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108005554B (en) | 2023-02-28 |
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