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NET MOUTH INCLINATION KEEPING TYPE TRAWL NET FISHERY SYSTEM

外国特許コード F120006909
整理番号 S2006-0797-C0
掲載日 2012年10月9日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2007JP057138
国際公開番号 WO 2008/029533
国際出願日 平成19年3月30日(2007.3.30)
国際公開日 平成20年3月13日(2008.3.13)
優先権データ
  • 特願2006-241951 (2006.9.6) JP
発明の名称 (英語) NET MOUTH INCLINATION KEEPING TYPE TRAWL NET FISHERY SYSTEM
発明の概要(英語)

Provided is a net mouth inclination type trawl net fishery system for controlling a posture autonomously. The trawl net fishery system comprises a trawl net including a body portion of a quadrangular pyramid shape formed of an upper net, a lower net and a pair of side nets, and a cot end portion connected to the leading end of the quadrangular pyramid shape. In the trawl net, the side net of the body portion has a longer side and a shorter side as its upper and lower sides, and the sides forming the net mouth edges such an inclination angle (?) of the side net front edge with respect to the bottom side of the a isosceles trapezoid having a shorter leg as the shorter side as satisfies the relation of the following Formula (1), so that the front edge of the net mouth is enabled to keep an inclination angle (ss) autonomously by the resistance and lift of a water flow with respect to the net: (y1CD?1 - x1CL?1)S1 + (y2CD?2 + x2CL?2)S2 + 2ySCD?SSS + 2awfsinss/(?aV<2>) = 0 - - - (1).

  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • NATIONAL UNIVERSITY CORPORATION TOKYO UNIVERSITY OF MARINE SCIENCE AND TECHNOLOGY,
  • HU, FUXIANG,
  • TOKAI, TADASHI,
  • SHIODE, DAISUKE,
  • OZEKI, YOSHIOKI,
  • KUBOTA, HIROSHI
  • 発明者(英語)
  • HU, FUXIANG,
  • TOKAI, TADASHI,
  • SHIODE, DAISUKE,
  • OZEKI, YOSHIOKI,
  • KUBOTA, HIROSHI
国際特許分類(IPC)

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