CN108468507A - A kind of extension ladder - Google Patents
A kind of extension ladder Download PDFInfo
- Publication number
- CN108468507A CN108468507A CN201810112107.3A CN201810112107A CN108468507A CN 108468507 A CN108468507 A CN 108468507A CN 201810112107 A CN201810112107 A CN 201810112107A CN 108468507 A CN108468507 A CN 108468507A
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- China
- Prior art keywords
- inner tube
- nodal axisn
- flexible
- crosspiece
- section
- 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.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/04—Ladders for resting against objects, e.g. walls poles, trees
- E06C1/08—Ladders for resting against objects, e.g. walls poles, trees multi-part
- E06C1/12—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
- E06C1/397—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders characterised by having wheels, rollers, or runners
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/02—Extending means
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/14—Holders for pails or other equipment on or for ladders
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/42—Ladder feet; Supports therefor
- E06C7/46—Non-skid equipment
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/48—Ladder heads; Supports for heads of ladders for resting against objects
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rehabilitation Tools (AREA)
- Ladders (AREA)
Abstract
The invention discloses a kind of extension ladder, including two identical flexible montants, the rotation axis that flexible montant can be driven flexible in flexible montant is set, the electric assembly for driving rotation axis rotation, the crosspiece being arranged between two flexible montants, traveling wheel on extension ladder top is set；Ladder energy automatic telescopic of the present invention, telescopic extensions are big, and the people that ascends a height can be carried when flexible, alleviate the labor intensity for the people that ascends a height, and avoid the people that ascends a height and climb up on foot and climb down risk；In addition, flexible montant and rotation axis mutually restrict, therefore flexible montant respectively saves pipe and each nodal axisn of rotation axis is not fallen out；Equipped with travel switch, when flexible montant reaches the flexible limit, automatic shutdown circuit, effective protection motor.
Description
Technical field
The invention belongs to ascending tool technical field, specially a kind of extension ladder.
Background technology
Ladder is a kind of extensive ascending tool of use.The current existing ladder people that is required for ascending a height climbs up climb down on foot,
Labor intensity is big, and risk is high.Reduce contour dimension for the ease of portable, people are made that various with flexible or folder function
Ladder, it is but flexible or fold manpower is needed to complete, and stroke is very limited.
Invention content
In order to solve the deficiencies in the prior art, the present invention provides a kind of extension ladder.
The technical solution adopted in the present invention is：A kind of extension ladder, it is characterized in that：The extension ladder includes two complete
Identical flexible montant is arranged the rotation axis that flexible montant can be driven flexible in flexible montant, drives rotation axis rotation
Traveling wheel on extension ladder top is arranged in electric assembly, the crosspiece being arranged between two flexible montants；
The flexible montant includes individually a section outer tube and n saves inner tube, and n is more than or equal to 2 and is positive integer, often saves inner tube length phase
It is slightly larger than single-unit inner tube length Deng, outer length of tube, outer tube and inner tube often save cross-sectional shape and be all square and cross section size
It is sequentially reduced, first segment inner tube is made to be slided in outer inner telescoping tube, second section inner tube telescopic slide ... ... in first segment inner tube,
The rest may be inferred, the n-th section inner tube telescopic slide in the (n-1)th section inner tube；The outer tube top is equipped with bearing；In the first segment
Pipe, the second section inner tube ..., the top of the n-th section inner tube be respectively equipped with first end cover, second end cover ..., the n-th end cap, first
End cap, second end cover ..., be respectively equipped at the center of the n-th end cap the first circular hole, the second circular hole ..., the n-th circular hole, first
Circular hole, the second circular hole ..., the size of the n-th circular hole be sequentially increased, be designed with internal thread on each circular-hole internal-wall；
The rotation axis includes individually n nodal axisns, is cylinder per nodal axisn appearance, per nodal axisn equal length and with every section inner tube length
It is equal, be sequentially increased from the first nodal axisn to the n-th nodal axisn cross section, the first nodal axisn made to match with the first circular hole, the second nodal axisn with
Second circular hole matches ... ..., and so on, the n-th nodal axisn matches with the n-th circular hole, is hollow from the second nodal axisn to the n-th nodal axisn
Structure, and hollow shape is hexagonal prism shape, is sequentially increased from the second nodal axisn to the n-th nodal axisn hollow cross-section；First nodal axisn
Top is connected with outer tube top bearing；It is designed with external screw thread, external screw thread and the internal thread phase on circular hole on axle body per nodal axisn
Matching makes the internal thread rotatable engagement that the external screw thread of every nodal axisn is covered with corresponding inner tube to drive the flexible of the inner tube；The
One nodal axisn, the second nodal axisn ..., the bottom end of the (n-1)th nodal axisn be respectively equipped with the first hexagonal prisms, the second hexagonal prisms ..., n-th-
1 hexagonal prisms, and the outer diameter of each hexagonal prisms is slightly greater than the outer diameter of place axis, the hollow matching of the first hexagonal prisms and the second nodal axisn
It closes, the second hexagonal prisms are matched with the hollow of third nodal axisn ... ..., and so on, in the (n-1)th hexagonal prism and the n-th nodal axisn
Kongxiang coordinates, and makes the hexagonal prisms of every nodal axisn can only be relatively unrotatable in the hollow middle telescopic slide of next nodal axisn；
The top between two flexible montants is arranged in the electric assembly, and electric assembly includes transmission shaft, clockwise and anticlockwise motor, control
Circuit processed, battery；The transmission shaft is arranged between two the first nodal axisns and is engaged transmission with two the first nodal axisns, makes transmission shaft
Two first segment shaft rotations can be driven dynamic；The motor is connect by gear with transmission shaft driven；The control circuit and motor phase
Connection, control circuit controls the positive and negative rotation of motor, is equipped in control circuit and rotates forward switch, reversal switch, travel switch, wherein going
Journey opens the limit inductor setting in the Central Shanxi Plain at outer tube bottom end, and the setting of another limit inductor is in outer tube top end, two limits
Position inductor is all answered with first end cover conflict sense, when first end cover downlink or uplink to outer tube bottom end or top and limit induction
Device conflict sense is answered, and travel switch automatically disconnects the circuit, motor stalls；The battery is connected with control circuit, and battery is given
Motor provides electric energy；
The crosspiece includes outer tube crosspiece and inner tube crosspiece；The outer tube crosspiece is several, is uniformly arranged between two outer tubes,
Wherein the outer tube crosspiece of the top is hollow, hollow interior setting electric assembly, and the rotating forward switch, reversal switch in electric assembly are set
It sets on outer tube crosspiece outer wall；Said inner tube crosspiece is n, and n inner tube crosspiece is respectively provided at both sides tube bottom in corresponding n sections
Between end, inner tube crosspiece cross section is " Qian " shape, and inner tube crosspiece cross section size is identical as corresponding inner tube cross section size,
When inner tube is shunk completely, inner tube crosspiece is also correspondingly shunk completely；
The traveling wheel is arranged on extension ladder top, in rotation walking on metope of ascending a height when traveling wheel stretches for ladder.
Further, the extension ladder is equipped with foot pedal, and foot pedal is disposed therein on an outer tube crosspiece.
Further, the extension ladder bottom end is equipped with antiskid plate, and antiskid plate is rotatablely connected with extension ladder bottom end.
Further, the extension ladder top is equipped with tool box.
Further, the battery is chargeable battery.
The course of work of the present invention is：Ladder in fully collapsed condition is placed on by a gradient and is ascended a height on metope,
The people that ascends a height stands on the footrests, starts and rotates forward switch, and motor drives transmission shaft rotation, transmission shaft to drive first segment shaft rotation dynamic, the
The external screw thread of one nodal axisn and the internal thread of first end cover, which cooperate, drives first segment inner tube to extend downwardly, and first segment inner tube drives
Second nodal axisn is downwardly together；Meanwhile the first hexagonal prisms on nodal axisn drive the rotation of the second nodal axisn, the external screw thread of the second nodal axisn and the
The internal thread of two end caps, which cooperates, drives the second section inner tube to extend downwardly, and the second inner tube drives third axis downwardly together；...,
The rest may be inferred, and each inner tube that saves extends downwardly simultaneously under the drive of motor, and entire ladder is driven to increase upwards, ladder driving walking
Wheel is in rotation walking upwards on metope of ascending a height；Same principle starts reversal switch, and each inner tube that saves is shunk simultaneously, and driving is entire
Ladder reduces downwards；It when first end cover moves to the limit (top and bottom end of outer tube), is answered with limit inductor conflict sense, row
Cheng Kaiguan is automatically disconnected the circuit, motor stalls, and ladder stops flexible.
Present invention has the advantages that：Automatic telescopic, telescopic extensions are big, are convenient for carrying, using extensive；The present invention and existing skill
Art maximum is not both that the people that ascends a height can be carried when flexible, greatly reduces the labor intensity for the people that ascends a height, and avoids the people apprentice that ascends a height
Step, which is climbed up, climbs down risk；In addition, the flexible mutual restriction of flexible montant and rotation axis, therefore flexible montant respectively saves pipe and rotation axis
Each nodal axisn is not fallen out；Equipped with travel switch, when flexible montant reaches the flexible limit, automatic shutdown circuit, effective protection electricity
Machine prolongs the service life, energy saving.
Description of the drawings
If Fig. 1 is surface structure schematic diagram of the present invention.
If Fig. 2 is unilateral flexible montant and its internal rotational axis structural schematic diagram of the invention.
If Fig. 3 is end cover structure schematic diagram of the present invention.
If Fig. 4 is rotation shaft structure schematic diagram of the present invention.
Specific implementation mode
The present invention will be further described below in conjunction with the accompanying drawings.
Following example sets inner tube as three sections, i.e. n=3 in invention content.
A kind of extension ladder, it is characterized in that：The extension ladder includes two identical flexible montants, setting flexible
The electric assembly of the rotation axis 11, the drive rotation of rotation axis 11 that can drive flexible montant flexible in montant is arranged and is stretched at two
Traveling wheel 6 on extension ladder top is arranged in crosspiece between contracting montant；
The flexible montant includes individually that a section outer tube 1 and three saves inner tube 10, often saves 10 equal length of inner tube, 1 length of outer tube is slightly
More than 10 length of single-unit inner tube, outer tube 1 and inner tube 10 often save that cross-sectional shape is all square and cross section size is sequentially reduced,
Make first segment inner tube A telescopic slides in outer tube 1, second section inner tube B telescopic slides in first segment inner tube A, third section inner tube C
The telescopic slide in the second section inner tube B；1 top of the outer tube is equipped with bearing 14；The first segment inner tube A, the second section inner tube B,
The top of third section inner tube C is respectively equipped with first end cover G, second end cover H, third end cap I, first end cover G, second end cover H,
The first circular hole L, the second circular hole M, third circular hole N, the first circular hole L, the second circular hole M, third are respectively equipped at the center of three end cap I
The size of circular hole N is sequentially increased, and internal thread 19 is designed on 18 inner wall of each circular hole；
The rotation axis 11 includes individually three nodal axisns, is cylinder per nodal axisn appearance, per nodal axisn equal length and with every section inner tube
10 equal lengths, from the first nodal axisn D to third nodal axisn F, cross section is sequentially increased, and the first nodal axisn D is made to match with the first circular hole L,
Second nodal axisn E matches with the second circular hole M, and third nodal axisn F matches with third circular hole N, during the second nodal axisn E, third nodal axisn F are
Hollow structure and hollow cross-section is sequentially increased, hollow 21 shape are hexagonal prism shape；First tops nodal axisn D and 1 top of outer tube
Bearing 14 is connected；It is designed with external screw thread 20 on axle body per nodal axisn 11, external screw thread 20 matches with the internal thread 19 on circular hole,
The external screw thread 20 of every nodal axisn 11 is set to drive stretching for the inner tube with 19 rotatable engagement of internal thread on 10 end cap 17 of corresponding inner tube
Contracting；First nodal axisn D, the second nodal axisn E bottom end be respectively equipped with the first hexagonal prisms J, the second hexagonal prisms K, and each hexagonal prisms 12
The outer diameter of axis where outer diameter is slightly greater than, the first hexagonal prisms J matches with the hollow O of the second nodal axisn E, the second hexagonal prisms K and the
The hollow P of three nodal axisn F is matched, make every nodal axisn hexagonal prisms 12 can only in hollow the 21 of next nodal axisn telescopic slide and cannot
It relatively rotates；
The top between two flexible montants is arranged in the electric assembly, and electric assembly includes transmission shaft 16, clockwise and anticlockwise motor
15, control circuit, battery；The transmission shaft 16 is arranged between two the first nodal axisn D and is engaged biography with two the first nodal axisn D
It is dynamic, so that transmission shaft 16 is driven two the first nodal axisn D rotations；The motor 15 is sequentially connected by gear and transmission shaft 16；Institute
Control circuit is stated with motor 15 to be connected, control circuit controls the positive and negative rotation of motor 15, be equipped in control circuit rotate forward switch 4,
The setting of reversal switch 5, travel switch, wherein in travel switch a limit inductor 13 is in 1 bottom end of outer tube, another limit
Inductor 13 is arranged on 1 top of outer tube, and two limit inductors 13 are all answered with first end cover G conflict senses, when first end cover G downlinks
Or answered with 13 conflict sense of limit inductor when going upward to 1 bottom end of outer tube or top, travel switch automatically disconnects the circuit, and motor stops
Rotation；The battery is connected with control circuit, and battery provides electric energy to motor 15；
The crosspiece includes outer tube crosspiece 7 and inner tube crosspiece 8；The outer tube crosspiece 7 is several, is uniformly arranged on two outer tubes 1
Between, wherein the outer tube crosspiece 7 of the top is hollow, hollow interior setting electric assembly, rotating forward switch 4 in electric assembly, instead
Pass 5 is turned on to be arranged on 7 outer wall of outer tube crosspiece；Said inner tube crosspiece 8 is three, and three inner tube crosspieces 8 are respectively provided at both sides
Between corresponding three section inner tube 10 bottom end, 8 cross section of inner tube crosspiece is to fall " Qian " shape, 8 cross section size of inner tube crosspiece with it is corresponding
Inner tube cross section size it is identical, when inner tube 10 completely shrink when, inner tube crosspiece 8 also correspondingly completely shrink；
The traveling wheel 6 is arranged on extension ladder top, in rotation walking on metope of ascending a height when traveling wheel 6 stretches for ladder.
Further, the extension ladder is equipped with foot pedal 2, and foot pedal 2 is disposed therein on an outer tube crosspiece 7.
Further, the extension ladder bottom end is equipped with antiskid plate 9, and antiskid plate 9 is rotatablely connected with extension ladder bottom end.
Further, the extension ladder top is equipped with tool box 3.
Further, the battery is chargeable battery.
Claims (5)
1. a kind of extension ladder, it is characterized in that：The extension ladder includes two identical flexible montants, setting flexible perpendicular
The electric assembly of the rotation axis, drive rotation axis rotation that can drive flexible montant flexible in bar is arranged in two flexible montants
Between crosspiece, traveling wheel on extension ladder top is set；
The flexible montant includes individually a section outer tube and n saves inner tube, and n is more than or equal to 2 and is positive integer, often saves inner tube length phase
It is slightly larger than single-unit inner tube length Deng, outer length of tube, outer tube and inner tube often save cross-sectional shape and be all square and cross section size
It is sequentially reduced, first segment inner tube is made to be slided in outer inner telescoping tube, second section inner tube telescopic slide ... ... in first segment inner tube,
The rest may be inferred, the n-th section inner tube telescopic slide in the (n-1)th section inner tube；The outer tube top is equipped with bearing；Said inner tube often saves
Top be designed with end cap, be designed with circular hole at end cap central, from first segment inner tube end cap circular hole to n-th section inner tube end cap circular hole
It is sequentially increased, spiral groove is designed on circular-hole internal-wall；
The rotation axis includes individually n nodal axisns, is cylinder per nodal axisn appearance, per nodal axisn equal length and with every section inner tube length
It is equal, it is sequentially increased from the first nodal axisn to the n-th nodal axisn cross section, wherein the n-th nodal axisn cross section is less than the n-th section inner tube inscribed circle,
It is hollow structure from the second nodal axisn to the n-th nodal axisn, and hollow shape is hexagonal prism shape, in from the second nodal axisn to the n-th nodal axisn
Empty cross section is sequentially increased；First nodal axisn top is connected with outer tube top bearing；It is designed with spiral prominence on axle body per nodal axisn
It rises, the spiral groove that wherein first segment axial screw protrusion is covered with first segment inner tube matches, the spiral prominence of the second nodal axisn
It plays the spiral groove covered with the second section inner tube to match ... ..., and so on, in the spiral salient of the n-th nodal axisn and the n-th section
Spiral groove in pipe end-cap matches, and the spiral groove rotation that the spiral salient of every nodal axisn is covered with corresponding inner tube is made to match
It closes to drive the flexible of the inner tube；Every nodal axisn bottom end in from the first nodal axisn to the (n-1)th nodal axisn is designed with hexagonal prism, each
The outer diameter of axis where the outer diameter of hexagonal prism is slightly greater than, the hexagonal prism of the first nodal axisn and the hollow sliding of the second nodal axisn are matched
It closes, hexagonal prism and the hollow of third nodal axisn of the second nodal axisn are slidably matched ... ..., and so on, six ribs of the (n-1)th nodal axisn
Cylinder is slidably matched with the hollow of the n-th nodal axisn, makes the hexagonal prism of every nodal axisn that can be driven by the hollow cooperation of next nodal axisn
Next nodal axisn common rotation, and the hexagonal prism per nodal axisn can be in the hollow interior telescopic slide of next nodal axisn；
The top between two flexible montants is arranged in the electric assembly, and electric assembly includes transmission shaft, clockwise and anticlockwise motor, control
Circuit processed, battery；The transmission shaft is arranged between two the first nodal axisns and is engaged transmission with two the first nodal axisns, makes transmission shaft
Two first segment shaft rotations can be driven dynamic；The motor is connect by gear with transmission shaft driven；The control circuit and motor phase
Connection, control circuit controls the positive and negative rotation of motor, is equipped in control circuit and rotates forward switch, reversal switch, travel switch, wherein going
Journey opens the limit inductor setting in the Central Shanxi Plain at outer tube bottom end, and the setting of another limit inductor is in outer tube top end, two limits
Position inductor is all answered with first segment inner tube end cap conflict sense, when first segment inner tube end cap downlink or uplink to outer tube bottom end or top
When answered with limit inductor conflict sense, travel switch automatically disconnect the circuit, motor stalls；The battery and control circuit phase
Connection, battery provide electric energy to motor；
The crosspiece includes outer tube crosspiece and inner tube crosspiece；The outer tube crosspiece is several, is uniformly arranged between two outer tubes,
Wherein the crosspiece of the top is hollow, hollow interior setting electric assembly, and the rotating forward switch, reversal switch setting in electric assembly exist
On outer tube crosspiece outer wall；Said inner tube crosspiece is n, n inner tube crosspiece be respectively provided at both sides corresponding n save inner tube bottom end it
Between, inner tube crosspiece cross section is " Qian " shape, and inner tube crosspiece cross section size is identical as corresponding inner tube cross section size, when interior
When pipe is shunk completely, inner tube crosspiece is also correspondingly shunk completely；
The traveling wheel is arranged on extension ladder top, in rotation walking on metope of ascending a height when traveling wheel stretches for ladder.
2. a kind of extension ladder according to claim 1, it is characterized in that：The extension ladder is equipped with foot pedal, foot pedal
It is disposed therein on an outer tube crosspiece.
3. a kind of extension ladder according to claim 1, it is characterized in that：The extension ladder bottom end is equipped with antiskid plate, anti-skidding
Plate is rotatablely connected with extension ladder bottom end.
4. a kind of extension ladder according to claim 1, it is characterized in that：The extension ladder top is equipped with tool box.
5. a kind of extension ladder according to claim 1, it is characterized in that：The battery is chargeable battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810112107.3A CN108468507B (en) | 2018-02-05 | 2018-02-05 | A kind of telescopic ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810112107.3A CN108468507B (en) | 2018-02-05 | 2018-02-05 | A kind of telescopic ladder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108468507A true CN108468507A (en) | 2018-08-31 |
| CN108468507B CN108468507B (en) | 2019-08-02 |
Family
ID=63266112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810112107.3A Active CN108468507B (en) | 2018-02-05 | 2018-02-05 | A kind of telescopic ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108468507B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322613A (en) * | 2018-11-27 | 2019-02-12 | 苏州东润梯业有限公司 | A kind of ladder latching device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2876043Y (en) * | 2005-12-30 | 2007-03-07 | 吉林大学 | Mechanical type lifter |
| CN202300170U (en) * | 2011-10-26 | 2012-07-04 | 首都航天机械公司 | Portable and rapid double-pole climbing ladder |
| US20140246271A1 (en) * | 2013-02-11 | 2014-09-04 | Paul Morris Davies | Extension ladder incorporating a winch-operated elevator |
| CN206942632U (en) * | 2017-02-08 | 2018-01-30 | 河北工程大学 | It is a kind of voluntarily to control mobile staircase |
-
2018
- 2018-02-05 CN CN201810112107.3A patent/CN108468507B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2876043Y (en) * | 2005-12-30 | 2007-03-07 | 吉林大学 | Mechanical type lifter |
| CN202300170U (en) * | 2011-10-26 | 2012-07-04 | 首都航天机械公司 | Portable and rapid double-pole climbing ladder |
| US20140246271A1 (en) * | 2013-02-11 | 2014-09-04 | Paul Morris Davies | Extension ladder incorporating a winch-operated elevator |
| CN206942632U (en) * | 2017-02-08 | 2018-01-30 | 河北工程大学 | It is a kind of voluntarily to control mobile staircase |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322613A (en) * | 2018-11-27 | 2019-02-12 | 苏州东润梯业有限公司 | A kind of ladder latching device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108468507B (en) | 2019-08-02 |
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Effective date of registration: 20190418 Address after: 230000 Anhui Hefei high tech Zone Innovation Industrial Park two phase J2 District C block 18 floor. Applicant after: HEFEI LONGTUTEM INFORMATION TECHNOLOGY Co.,Ltd. Address before: Room 2506, Building 1, Xinhua City, Suiyang District, Shangqiu City, Henan Province Applicant before: Wei Min |
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Effective date of registration: 20190708 Address after: 321306 No. 19 Weitai Road, Industrial Functional Zone, Zhiying Town, Yongkang City, Jinhua City, Zhejiang Province Applicant after: ZHEJIANG YONGAN DELI INDUSTRY & TRADE CO.,LTD. Address before: 230000 Anhui Hefei high tech Zone Innovation Industrial Park two phase J2 District C block 18 floor. Applicant before: HEFEI LONGTUTEM INFORMATION TECHNOLOGY Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A telescopic ladder Effective date of registration: 20230109 Granted publication date: 20190802 Pledgee: Yongkang branch of the Industrial Commercial Bank of China Ltd. Pledgor: ZHEJIANG YONGAN DELI INDUSTRY & TRADE CO.,LTD. Registration number: Y2023330000066 |
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