Title:
推力発生装置
Document Type and Number:
Japanese Patent JP4273168
Kind Code:
B1
Abstract:
A thrust generating apparatus is provided that can transform a spouting water flow having a small diameter into a water flow having a large diameter, and that can be provided at the bow or the stern end. A bell-shaped nozzle is coupled to an ejection port of a pump water flow, a ring having a blade-shaped cross section is disposed inside the nozzle, and a shell-shaped cone is disposed inside the ring on the center line of a water flow. Thereby, an ejection flow is straightened, and a thrust is generated. In addition, the bottom of the cone is open, a slit is further provided at a shoulder portion of the cone forward of the ring, and the water flow inside the cone is in communication with a water flow outside the cone. Furthermore, a rotating door is provided that enables the nozzle to pivot toward a shell plating opening on a port side or a starboard side, and that closes or opens the shell plating opening in accordance with the position of the nozzle.
Inventors:
Akira Nagayama
Application Number:
JP2008151345A
Publication Date:
June 03, 2009
Filing Date:
June 10, 2008
Export Citation:
Assignee:
Akira Nagayama
International Classes:
B63H25/42; B63H1/28; B63H11/103
Domestic Patent References:
| JP54040495A | ||||
| JP2001260987A | ||||
| JP41001709Y1 |
Attorney, Agent or Firm:
Masayuki Tsukiyama