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Patent Searching and Data


Title:
FOLDABLE AND ANGULARLY ADJUSTABLE LADDER
Document Type and Number:
WIPO Patent Application WO/2020/248871
Kind Code:
A1
Abstract:
A foldable and angularly adjustable ladder, comprising two side supports (1) and a plurality of stair treads (2) disposed between the two side supports (1). The stair treads (2) are rotatably connected to the two side supports (1) respectively at two ends thereof. Each side support (1) consists of an upper column (101) and a lower column (102) that are parallel to each other and is provided with a foot piece (3) at a bottom end thereof. The upper column (101) and the lower column (102) are connected to side surfaces of each stair tread (2) by means of connectors (4). Each connector (4) is sleeved with a metal ring (5). An end of the metal ring (5) at an inner side passes through a side board of the stair tread (2) and is located in the stair tread (2). The ladder can prevent side boards of stair treads (2) from directly contacting side supports (1), thus reducing abrasion wear that occurs between the stair treads (2) and the side supports (1).

Inventors:
CHONG KWOK LAI (CN)
Application Number:
PCT/CN2020/093909
Publication Date:
December 17, 2020
Filing Date:
June 02, 2020
Export Citation:
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Assignee:
CHARFONT LTD (CN)
International Classes:
E06C1/36
Foreign References:
CN210422447U2020-04-28
CN101238268A2008-08-06
GB2417280A2006-02-22
JPS5265633U1977-05-14
JPS5861900U1983-04-26
CN206722748U2017-12-08
CN204371092U2015-06-03
Attorney, Agent or Firm:
SHENZHEN ZHONGLIAN PATENT AGENCY CO., LTD. (CN)
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