Title:
改良された水中翼装置
Document Type and Number:
Japanese Patent JP3803251
Kind Code:
B2
Abstract:
A hydrofoil device is useable as a hydrofoil wing, propeller blade, etc. In a water flow, a relatively lower pressure is generated on a second surface (94) of the device compared with a first surface (96). Near the trailing end of the first surface a protrusion in the form of an adjustable interceptor (98) is provided. The face of this protrusion defines an included angle to the upstream direction of less than or equal to 90° so that water flow thereat is deflected back on itself thereby increasing the local pressure on the first surface. A second protrusion may be provided near the leading edge of the second surface (94) to encourage flow separation thereat. Air may be provided adjacent each protrusion to provide natural ventilation if the pressure of the water flow drops below atmospheric pressure.
Inventors:
Elms Richard Anthony
Application Number:
JP2000546992A
Publication Date:
August 02, 2006
Filing Date:
May 06, 1999
Export Citation:
Assignee:
ELMS AUSTRALIA PTY LTD
International Classes:
B63B1/24; B63B1/28; B63B39/06; B63H1/26; B63H25/38
Domestic Patent References:
| JP6305492A | ||||
| JP4100980U |
Foreign References:
| US1893064 | ||||
| US3109495 |
Attorney, Agent or Firm:
Hitoshi Maeda
Shingo Nishide
Koichiro Okura
Shingo Nishide
Koichiro Okura