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Title:
EXPANSION-AND-CONTRACTION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2022/092349
Kind Code:
A1
Abstract:
The present invention relates to an expansion-and-contraction apparatus, more specifically to an invention in which the diameter of expansion-and-contraction tubes gradually become smaller and the length can be sequentially adjusted, resulting in smaller volume, to allow portability. Moreover, the present invention can be extended or contracted by rotation to allow use in diverse products, such as construction poles, distance-measuring devices, portable antennas, pointers, ball pens, medicine-injecting plungers, hydraulic hoses, cranes, and camera tripods.

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Inventors:
NOH WOOK REA (KR)
Application Number:
PCT/KR2020/014874
Publication Date:
May 05, 2022
Filing Date:
October 29, 2020
Export Citation:
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Assignee:
NOH WOOK REA (KR)
International Classes:
F16L27/12
Foreign References:
US5035094A1991-07-30
KR102077988B12020-04-07
KR101254456B12013-04-12
JP2753626B21998-05-20
KR20110108082A2011-10-05
KR20200126539A2020-11-09
Attorney, Agent or Firm:
LEE, Jeong Hee (KR)
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