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WATER JET SPRAY NOZZLE, WATER JET SPRAY DEVICE, GASTROINTESTINAL TRACT CLEANING DEVICE, AND GASTRIC WALL CLEANING DEVICE meetings

Foreign code F130007672
File No. S2012-0434-N0
Posted date Oct 17, 2013
Country WIPO
International application number 2013JP053480
International publication number WO 2013/122125
Date of international filing Feb 14, 2013
Date of international publication Aug 22, 2013
Priority data
  • P2012-029019 (Feb 14, 2012) JP
Title WATER JET SPRAY NOZZLE, WATER JET SPRAY DEVICE, GASTROINTESTINAL TRACT CLEANING DEVICE, AND GASTRIC WALL CLEANING DEVICE meetings
Abstract

Provided is a water jet spray nozzle, a water jet spray device, a gastrointestinal tract cleaning device, and a gastric wall cleaning device, whereby the cleaning performance with respect to water pressure can be increased, and when used to clean the gastric wall, gastric mucus can be effectively removed without damaging stomach tissue such as the gastric mucosa. A water jet spray nozzle (11) comprising: a flow path (11a) that includes, in order toward the distal end, a small-diameter portion (21) having an inner diameter that decreases from the upstream side, an expanded portion (22) having an inner diameter larger than that of the small-diameter portion (21), and a jet orifice (23) having an inner diameter smaller than that of the expanded portion (22). When water flows at a pressure of 0.2 to 0.6 MPa to the flow path (11a), the water collects in the expanded portion (22) and a cavitation bubble is generated heading from the small-diameter portion (21) toward the expanded portion (22). The inner diameter of the small-diameter portion (21) is 0.5 to 0.7 mm, and the inner diameter of the jet orifice (23) is 1 to 1.3 times larger than the inner diameter of the small-diameter portion (21).

  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • TOHOKU UNIVERSITY,
  • SHOWA UNIVERSITY
  • Inventor
  • SOYAMA HITOSHI,
  • AMI KATSUNORI,
  • YAMAMOTO MATSUO
IPC(International Patent Classification)
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