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WO2002052987A1 - Shifting system for chair - Google Patents

Shifting system for chair Download PDF

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Publication number
WO2002052987A1
WO2002052987A1 PCT/KR2001/002218 KR0102218W WO02052987A1 WO 2002052987 A1 WO2002052987 A1 WO 2002052987A1 KR 0102218 W KR0102218 W KR 0102218W WO 02052987 A1 WO02052987 A1 WO 02052987A1
Authority
WO
WIPO (PCT)
Prior art keywords
chair
wheel
storage cavity
spring
driving plate
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.)
Ceased
Application number
PCT/KR2001/002218
Other languages
French (fr)
Inventor
Yong-Ho Hwang
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2002052987A1 publication Critical patent/WO2002052987A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/002—Chair or stool bases
    • A47C7/006—Chair or stool bases with castors
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B91/00—Feet for furniture in general
    • A47B91/06—Gliders or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00—Castors in general; Anti-clogging castors
    • B60B33/0002—Castors in general; Anti-clogging castors assembling to the object, e.g. furniture
    • B60B33/0005—Castors in general; Anti-clogging castors assembling to the object, e.g. furniture characterised by mounting method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00—Castors in general; Anti-clogging castors
    • B60B33/0002—Castors in general; Anti-clogging castors assembling to the object, e.g. furniture
    • B60B33/0015—Castors in general; Anti-clogging castors assembling to the object, e.g. furniture characterised by adaptations made to castor
    • B60B33/0018—Castors in general; Anti-clogging castors assembling to the object, e.g. furniture characterised by adaptations made to castor in the form of a flat mounting plate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00—Castors in general; Anti-clogging castors
    • B60B33/0036—Castors in general; Anti-clogging castors characterised by type of wheels
    • B60B33/0039—Single wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00—Castors in general; Anti-clogging castors
    • B60B33/0047—Castors in general; Anti-clogging castors characterised by details of the rolling axle
    • B60B33/0049—Castors in general; Anti-clogging castors characterised by details of the rolling axle the rolling axle being horizontal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00—Castors in general; Anti-clogging castors
    • B60B33/0047—Castors in general; Anti-clogging castors characterised by details of the rolling axle
    • B60B33/0057—Castors in general; Anti-clogging castors characterised by details of the rolling axle the rolling axle being offset from swivel axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00—Castors in general; Anti-clogging castors
    • B60B33/006—Castors in general; Anti-clogging castors characterised by details of the swivel mechanism
    • B60B33/0065—Castors in general; Anti-clogging castors characterised by details of the swivel mechanism characterised by details of the swivel axis
    • B60B33/0068—Castors in general; Anti-clogging castors characterised by details of the swivel mechanism characterised by details of the swivel axis the swivel axis being vertical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00—Castors in general; Anti-clogging castors
    • B60B33/04—Castors in general; Anti-clogging castors adjustable, e.g. in height; linearly shifting castors
    • B60B33/045—Castors in general; Anti-clogging castors adjustable, e.g. in height; linearly shifting castors mounted resiliently, by means of dampers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00—Castors in general; Anti-clogging castors
    • B60B33/04—Castors in general; Anti-clogging castors adjustable, e.g. in height; linearly shifting castors
    • B60B33/06—Castors in general; Anti-clogging castors adjustable, e.g. in height; linearly shifting castors mounted retractably
    • B60B33/063—Castors in general; Anti-clogging castors adjustable, e.g. in height; linearly shifting castors mounted retractably by linear movement parallel to swivel axis

Definitions

  • the present invention relates to a shifting system for chair, and more particularly to a shifting device that is attached to chair legs.
  • the shifting device with a wheel, when an occupant seats in the chair, the wheel ascends and is inserted into a storage cavity by the pressure of an occupant weight, thereby fixing the chair, while when the occupant rises up from the chair, the wheel descends and is protruded from the storage cavity, thereby enabling free movement of the chai .
  • seating articles such as chairs are classified into two types, i.e., a stationary type without wheels and a mobile type with wheels .
  • the stationary type of the chair is fixed and immovable. Therefore, with this type of the chair, the occupant feels very stable and comfortable. But it is inconvenient to move this type of chai .
  • the mobile type of the chair is easily and freely moved anywhere.
  • the mobile type of the chair is unstable, thereby the occupant feels uncomfortable.
  • the mobile type of the chair is considerably big in size and is non-elegant in design, this type of the chair has limits in using it in high-grade and/or luxury articles.
  • the shifting device comprises a base body with a storage cavity formed in a designated shape on the lower surface, a shaft formed on the bottom surface of the storage cavity, a driving plate engaged with the shaft to freely change a rotating direction of a wheel, a connection cylinder with a threshold formed on an edge of the bottom surface of the driving plate, a spring formed within the connection cylinder, and a wheel holder with the wheel attached to the end of the spring.
  • a leaf spring in a cone shape is used as the spring to minimize the spring size when pressed.
  • a shifting device for chair comprises a threshold formed on the end of the storage cavity of the base body, an elevating plate attached to the end of the spring, a shaft formed on the lower surface of the elevating plate, a driving plate engaged with the shaft, and a wheel holder with a wheel formed on an edge of the bottom surface of the driving plate.
  • FIG. 1 is a perspective view of .a chair provided with a shifting device in accordance with the present invention
  • FIGs. 2A and 2B are cross-sectional views of a shifting device for, chair in accordance with a preferred embodiment of the present invention, respectively, in an insertion and a protrusion condition of a wheel;
  • FIGs. 3A and 3B are cross-sectional views of a shifting device for chair in accordance with another preferred embodiment of the present invention, respectively, in an insertion and a protrusion condition of a wheel; and FIGs . 4A and 4B are diagrammatic front views of a chair leg provided with a shifting device of the present invention, respectively, in an insertion and a protrusion condition of a wheel .
  • FIG. 1 is a perspective view of a chair provided with a shifting device in accordance with the present invention.
  • FIGs. 2A and 2B are cross-sectional views of a shifting system for chair in accordance with a preferred embodiment of the present invention, respectively, in an insertion and a protrusion condition of a wheel.
  • a base body 10 of a shifting device is prepared.
  • the base body 10 comprises a storage cavity 11 formed in a designated shape on the lower surface of the base body 10.
  • a shaft 12 is formed on the bottom surface of the storage cavity 11.
  • a driving plate 20 is engaged with the shaft 12 to freely change a rotating direction of a wheel 40.
  • Ball bearings 13 are interposed between the bottom surface of the storage cavity 11 and the top surface of the driving plate 20, thereby enabling the more smooth rotating movement of the driving plate 20.
  • a connection cylinder 21 with a threshold 2la is formed on an edge of the bottom surface of the driving plate 20.
  • a spring 30 with elasticity is formed within the connection cylinder 21 and a wheel holder 41 with the wheel 40 is attached to the end of the spring 30.
  • a leaf spring in a cone shape is preferably used as the spring 30 to minimize the spring size when pressed.
  • FIGs. 3A and 3B are cross-sectional views of a shifting system for chair in accordance with another preferred embodiment of the present invention, respectively, in an insertion and a protrusion condition of a wheel.
  • threshold 10a is formed on the end of the storage cavity 11 of the base body 10.
  • a spring 30 with elasticity is attached to the bottom surface of the storage cavity 11 and an elevating plate 14 is attached to the end of the spring 30.
  • a shaft 12' is formed on the lower surface of the elevating plate 14 and the driving plate 20 is engaged with the shaft 12' .
  • the wheel holder 41 with the wheel 40 is formed on an edge of the bottom surface of the driving plate 20.
  • An auxiliary leg 22 is formed on an opposite edge of the bottom surface of the driving plate 20. The auxiliary leg 22 is distant from the ground in a protrusion condition of the wheel 40 but contacts the ground in an insertion condition of the wheel 40, thereby serving to prevent the incline of the elevating plate 14 when ascending.
  • FIGs . 4A and 4B are diagrammatic f ont views of a chair leg provided with the shifting device of the present invention, respectively, in an insertion and a protrusion condition of a wheel.
  • the shape of the base body 10 of the shifting device may be variously modified correspondingly to the shape of the chair leg A. Further, the base body 10 of the shifting device is attached to the chair leg A by a connection means such as a screw B or other means .
  • the base body 10 of the shifting device is attached to the end of the chair leg A. Therefore, when the chair is unoccupied, the wheel 40 descends and is protruded from the storage cavity 11 of the base body 10 by the elasticity of the spring 30, then the lower surface of the base body 10 is separated from the ground, thereby enabling free movement of the chair.
  • the spring 30 When an occupant seats in the chair, the spring 30 is pressed by the occupant weight, and the wheel 40 ascends and is inserted into the storage cavity 11 of the base body 10, then the lower surface of the base body 10 contacts the ground, thereby fixing the chair.
  • the base body 10 of the shifting device of the present invention may easily be attached to any easy chairs such as sofas as well as the conventional chairs. Furthermore, since the wheel 40 is stored within the storage cavity 11 of the base body 10, the shifting device of the present invention simplifies and beautifies the exterior of the chair
  • the shifting system for chair of the present invention when an occupant seats in the chair, the wheel ascends and is inserted into a storage cavity by the pressure of an occupant weight, thereby fixing the chair, while when the chair is vacant, the wheel descends and is protruded from the storage cavity, thereby enabling free movement of the chair, Further, the shifting system for chair of the present invention is easily attached to the conventional chairs and beautifies the exterior of the chai .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Abstract

A shifting system for chair includes a base body with a storage cavity formed in a designated shape on the lower surface, a shaft formed on the bottom surface of the storage cavity, a driving plate engaged with the shaft to freely change a rotating direction of a wheel, a connection cylinder with a threshold formed on an edge of the bottom surface of the driving plate, a spring formed within the connection cylinder, and a wheel holder with the wheel attached to the end of the spring.

Description

SHIFTING SYSTEM FOR CHAIR
TECHNICAL FIELD
The present invention relates to a shifting system for chair, and more particularly to a shifting device that is attached to chair legs. In the shifting device with a wheel, when an occupant seats in the chair, the wheel ascends and is inserted into a storage cavity by the pressure of an occupant weight, thereby fixing the chair, while when the occupant rises up from the chair, the wheel descends and is protruded from the storage cavity, thereby enabling free movement of the chai .
BACKGROUND ART Conventionally, seating articles such as chairs are classified into two types, i.e., a stationary type without wheels and a mobile type with wheels .
The stationary type of the chair is fixed and immovable. Therefore, with this type of the chair, the occupant feels very stable and comfortable. But it is inconvenient to move this type of chai .
On the other hand, the mobile type of the chair is easily and freely moved anywhere. However, the mobile type of the chair is unstable, thereby the occupant feels uncomfortable. Moreover, since the mobile type of the chair is considerably big in size and is non-elegant in design, this type of the chair has limits in using it in high-grade and/or luxury articles.
DISCLOSURE OF THE INVENTION
In order to solve the above-described problems, the present invention provides provide a shifting device for chair. The shifting device comprises a base body with a storage cavity formed in a designated shape on the lower surface, a shaft formed on the bottom surface of the storage cavity, a driving plate engaged with the shaft to freely change a rotating direction of a wheel, a connection cylinder with a threshold formed on an edge of the bottom surface of the driving plate, a spring formed within the connection cylinder, and a wheel holder with the wheel attached to the end of the spring.
Preferably, a leaf spring in a cone shape is used as the spring to minimize the spring size when pressed.
In another aspect of the present invention, a shifting device for chair comprises a threshold formed on the end of the storage cavity of the base body, an elevating plate attached to the end of the spring, a shaft formed on the lower surface of the elevating plate, a driving plate engaged with the shaft, and a wheel holder with a wheel formed on an edge of the bottom surface of the driving plate..
BRIEF DESCRIPTION OF THE DRAWINGS
These and other objects, features and advantages of the present invention will be readily understood with reference to the following detailed description thereof provided in conjunction with the accompanying drawings, wherein like reference numerals designate like structural elements, and, in which: FIG. 1 is a perspective view of .a chair provided with a shifting device in accordance with the present invention;
FIGs. 2A and 2B are cross-sectional views of a shifting device for, chair in accordance with a preferred embodiment of the present invention, respectively, in an insertion and a protrusion condition of a wheel;
FIGs. 3A and 3B are cross-sectional views of a shifting device for chair in accordance with another preferred embodiment of the present invention, respectively, in an insertion and a protrusion condition of a wheel; and FIGs . 4A and 4B are diagrammatic front views of a chair leg provided with a shifting device of the present invention, respectively, in an insertion and a protrusion condition of a wheel .
BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view of a chair provided with a shifting device in accordance with the present invention. FIGs. 2A and 2B are cross-sectional views of a shifting system for chair in accordance with a preferred embodiment of the present invention, respectively, in an insertion and a protrusion condition of a wheel. As shown in FIGs. 1, 2A, and 2B, a base body 10 of a shifting device is prepared. Herein, since the shifting device is attached to chair legs, the base body 10 needs to maintain the load of the chair. The base body 10 comprises a storage cavity 11 formed in a designated shape on the lower surface of the base body 10. A shaft 12 is formed on the bottom surface of the storage cavity 11. A driving plate 20 is engaged with the shaft 12 to freely change a rotating direction of a wheel 40. Ball bearings 13 are interposed between the bottom surface of the storage cavity 11 and the top surface of the driving plate 20, thereby enabling the more smooth rotating movement of the driving plate 20. A connection cylinder 21 with a threshold 2la is formed on an edge of the bottom surface of the driving plate 20. A spring 30 with elasticity is formed within the connection cylinder 21 and a wheel holder 41 with the wheel 40 is attached to the end of the spring 30. Herein, a leaf spring in a cone shape is preferably used as the spring 30 to minimize the spring size when pressed.
FIGs. 3A and 3B are cross-sectional views of a shifting system for chair in accordance with another preferred embodiment of the present invention, respectively, in an insertion and a protrusion condition of a wheel. In this embodiment, threshold 10a is formed on the end of the storage cavity 11 of the base body 10. A spring 30 with elasticity is attached to the bottom surface of the storage cavity 11 and an elevating plate 14 is attached to the end of the spring 30. A shaft 12' is formed on the lower surface of the elevating plate 14 and the driving plate 20 is engaged with the shaft 12' . The wheel holder 41 with the wheel 40 is formed on an edge of the bottom surface of the driving plate 20. An auxiliary leg 22 is formed on an opposite edge of the bottom surface of the driving plate 20. The auxiliary leg 22 is distant from the ground in a protrusion condition of the wheel 40 but contacts the ground in an insertion condition of the wheel 40, thereby serving to prevent the incline of the elevating plate 14 when ascending.
FIGs . 4A and 4B are diagrammatic f ont views of a chair leg provided with the shifting device of the present invention, respectively, in an insertion and a protrusion condition of a wheel. The shape of the base body 10 of the shifting device may be variously modified correspondingly to the shape of the chair leg A. Further, the base body 10 of the shifting device is attached to the chair leg A by a connection means such as a screw B or other means .
In accordance with the preferred embodiments of the present invention, the base body 10 of the shifting device is attached to the end of the chair leg A. Therefore, when the chair is unoccupied, the wheel 40 descends and is protruded from the storage cavity 11 of the base body 10 by the elasticity of the spring 30, then the lower surface of the base body 10 is separated from the ground, thereby enabling free movement of the chair.
When an occupant seats in the chair, the spring 30 is pressed by the occupant weight, and the wheel 40 ascends and is inserted into the storage cavity 11 of the base body 10, then the lower surface of the base body 10 contacts the ground, thereby fixing the chair.
And, the base body 10 of the shifting device of the present invention may easily be attached to any easy chairs such as sofas as well as the conventional chairs. Furthermore, since the wheel 40 is stored within the storage cavity 11 of the base body 10, the shifting device of the present invention simplifies and beautifies the exterior of the chair
In the drawings and specification, there have been disclosed typical preferred embodiments of this invention and although specific terms are employed, they are used in a generic and descriptive sense only not for purpose of limitation, the scope of this invention being set forth in the following claims .
INDUSTRIAL APPLICABILITY
In the shifting system for chair of the present invention, when an occupant seats in the chair, the wheel ascends and is inserted into a storage cavity by the pressure of an occupant weight, thereby fixing the chair, while when the chair is vacant, the wheel descends and is protruded from the storage cavity, thereby enabling free movement of the chair, Further, the shifting system for chair of the present invention is easily attached to the conventional chairs and beautifies the exterior of the chai .

Claims

WHAT IS CLAIMED IS:
1. A shifting system for chair, said system comprising: a base body with a storage cavity formed in a designated shape on the lower surface; a shaft formed on the bottom surface of the storage cavity; a driving plate engaged with said shaft to freely change a rotating direction of a wheel; a connection cylinder with a threshold formed on an edge of the bottom surface of said driving plate; a spring formed within said connection cylinder; and a wheel holder with the wheel attached to the end of said spring.
2. The shifting system for chair of claim 1, said system comprising: a threshold formed on the end of the storage cavity of the base body; an elevating plate attached to the end of said spring; a shaft formed on the lower surface of said elevating plate; a driving plate engaged with said shaft; and a wheel holder with a wheel formed on an edge of the bottom surface of said driving plate.
PCT/KR2001/002218 2000-12-29 2001-12-20 Shifting system for chair Ceased WO2002052987A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2020000036960U KR200227755Y1 (en) 2000-12-29 2000-12-29 Chair shifter
KR2000/36960 2000-12-29

Publications (1)

Publication Number Publication Date
WO2002052987A1 true WO2002052987A1 (en) 2002-07-11

Family

ID=19675250

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2001/002218 Ceased WO2002052987A1 (en) 2000-12-29 2001-12-20 Shifting system for chair

Country Status (2)

Country Link
KR (1) KR200227755Y1 (en)
WO (1) WO2002052987A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104644066A (en) * 2013-11-20 2015-05-27 苏州科沃斯商用机器人有限公司 Absorptive self-moving device
CN107865534A (en) * 2017-11-03 2018-04-03 曾辉鹏 Caster structure of wooden furniture
JP2019063878A (en) * 2017-09-28 2019-04-25 ファナック株式会社 Industrial machine and its transfer mechanism
CN110486577A (en) * 2019-08-22 2019-11-22 管华明 A kind of low-power consumption cloud computing cabinet multifunctional heat dissipation base
CN111572613A (en) * 2020-05-22 2020-08-25 广州金魁星家具有限公司 A furniture handling device that reduces the probability of damage and increases the stability of transport
CN112153841A (en) * 2020-10-09 2020-12-29 黄岩 Electrical control cabinet
US20240225290A1 (en) * 2023-01-10 2024-07-11 Current Products Company, LLC Retractable wheel system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04193106A (en) * 1990-11-26 1992-07-13 Ishio Nishioka Leg for chair
JPH09327344A (en) * 1996-06-10 1997-12-22 France Bed Co Ltd Furniture legs
KR19990022259U (en) * 1999-03-26 1999-06-25 김경락 A leg for chairs
KR200215227Y1 (en) * 2000-09-20 2001-03-02 김선민 A movable chair supporter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04193106A (en) * 1990-11-26 1992-07-13 Ishio Nishioka Leg for chair
JPH09327344A (en) * 1996-06-10 1997-12-22 France Bed Co Ltd Furniture legs
KR19990022259U (en) * 1999-03-26 1999-06-25 김경락 A leg for chairs
KR200215227Y1 (en) * 2000-09-20 2001-03-02 김선민 A movable chair supporter

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104644066A (en) * 2013-11-20 2015-05-27 苏州科沃斯商用机器人有限公司 Absorptive self-moving device
JP2019063878A (en) * 2017-09-28 2019-04-25 ファナック株式会社 Industrial machine and its transfer mechanism
US10584733B2 (en) 2017-09-28 2020-03-10 Fanuc Corporation Relocating mechanism of industrial machine
US10590977B2 (en) 2017-09-28 2020-03-17 Fanuc Corporation Industrial machine
CN107865534A (en) * 2017-11-03 2018-04-03 曾辉鹏 Caster structure of wooden furniture
CN110486577A (en) * 2019-08-22 2019-11-22 管华明 A kind of low-power consumption cloud computing cabinet multifunctional heat dissipation base
CN111734922A (en) * 2019-08-22 2020-10-02 徐树强 Low-power consumption cloud computer machine case is with multi-functional heat dissipation base
CN111572613A (en) * 2020-05-22 2020-08-25 广州金魁星家具有限公司 A furniture handling device that reduces the probability of damage and increases the stability of transport
CN111572613B (en) * 2020-05-22 2021-10-26 汇森明达（龙南）家具有限公司 Reduce and damage probability and increase and transport stable handling device for furniture
CN112153841A (en) * 2020-10-09 2020-12-29 黄岩 Electrical control cabinet
CN112153841B (en) * 2020-10-09 2021-06-29 山东郡玺实业有限公司 Electrical control cabinet
US20240225290A1 (en) * 2023-01-10 2024-07-11 Current Products Company, LLC Retractable wheel system

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