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Patent Searching and Data


Title:
AUTOMATIC LADDER HAVING LENGTH ADJUSTABLE BY ELECTRIC DRIVER
Document Type and Number:
WIPO Patent Application WO/2018/084519
Kind Code:
A1
Abstract:
According to the present invention, a ladder having an adjustable length comprises: a first support including a first outer support and a first inner support inserted into the first outer support; a horizontal foothold for connecting the first supports to each other; a first gear formed at the inner side of the horizontal foothold and having a groove part formed therein; a second gear engaging with the first gear and changing the rotational direction of the first gear; a rotary bar coupled to the second gear; a third gear formed at the end of one side of the rotary bar; a screw bolt having a fourth gear, which engages with the third gear and is formed at the end thereof, formed inside the first inner support, formed in a stick type, and having threads formed on the outer side thereof; and a screw nut in which the screw bolt is formed, and to which the first inner support is coupled at the outer side thereof.

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WO/2014/108134LADDER STRUCTURE
JP2013094578LADDER FOR EVACUATION
Inventors:
SEO, Dong Yeong (206-ho, Kunyoung Apt. 129, Taepyeong-ro,Jung-gu, Daegu, 41902, KR)
Application Number:
KR2017/012121
Publication Date:
May 11, 2018
Filing Date:
October 31, 2017
Export Citation:
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Assignee:
SEO, Dong Yeong (206-ho, Kunyoung Apt. 129, Taepyeong-ro,Jung-gu, Daegu, 41902, KR)
International Classes:
E06C7/12; E06C1/14; E06C7/06; E06C7/50
Foreign References:
US5033584A1991-07-23
JP2016121014A2016-07-07
JP2006250303A2006-09-21
CN106050119A2016-10-26
US2880920A1959-04-07
Attorney, Agent or Firm:
PARK, Jae Wan (809-ho, 254 Beotkkot-ro,Geumcheon-gu, Seoul, 08511, KR)
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