Title:
RUDDER VALVE AND RUDDER FOR SHIP
Document Type and Number:
Japanese Patent JP2013107522
Kind Code:
A
Abstract:
To provide a rudder valve that can be simply and inexpensively attached to an existing ship and enhance propelling property and a rudder for a ship having the rudder valve.
A base 111 of the rudder valve 110 attached to the rudder 100 has a cylindrical shape in which diameters of a bow side and a stern side are the same. The diameter of the base 111 is not more than the diameter R1 of the bow side of a propeller boss, and not less than the diameter R2 of the stern side. The diameter of the base 111 is set smaller than the maximum thickness of the rudder 100.
Inventors:
ISHII TOMONORI
TAMASHIMA MASAHIRO
TAMASHIMA MASAHIRO
Application Number:
JP2011254747A
Publication Date:
June 06, 2013
Filing Date:
November 22, 2011
Export Citation:
Assignee:
NIPPON YUSEN KK
RYUTAI TECHNO KK
RYUTAI TECHNO KK
International Classes:
B63H25/38; B63H1/20
Domestic Patent References:
| JPH11139395A | 1999-05-25 | |||
| JP2002178991A | 2002-06-26 | |||
| JP2008120370A | 2008-05-29 |
Attorney, Agent or Firm:
Takeo Masuda
Keisuke Komatsu
Teppei Kai
Keisuke Komatsu
Teppei Kai