OPENING SPRING FOR MULTIPLE FOLD AUTOMATIC OPEN-CLOSE UNBRELLA

Number of patents in Portfolio can not be more than 2000

United States of America Patent

APP PUB NO 20150068568A1
SERIAL NO

14025181

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An opening spring for multiple fold automatic open-close umbrellas is revealed. The opening spring is disposed in a shaft to provide power for extending the shaft while opening the umbrella. The opening spring is formed by a wound wire with a constant wire diameter and having a plurality segments of coils with different outer diameters. A gradually changing part is disposed between two adjacent segments of coils. The coil outer diameter of the gradually changing part is reduced from top to bottom along the axial direction.

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Patent Owner(s)

Patent OwnerAddress
WU TSUN-ZONGNO 132 YUCHEN RD WU-GU DISTRICT NEW TAIPEI CITY 248

International Classification(s)

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  • 2013 Application Filing Year
  • F16F Class
  • 702 Applications Filed
  • 619 Patents Issued To-Date
  • 88.18 % Issued To-Date

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
CHEN, Hsien-Jung New Taipei City, TW 7 23
WU, Tsun-Zong New Taipei City, TW 37 428

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Patent Citation Ranking

  • 4 Citation Count
  • F16F Class
  • 11.09 % this patent is cited more than
  • 10 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges483423471101 - 1011 - 2021 - 3031 - 4041 - 50020406080100120140160180200220240260280300320340360

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