Title:
SOUND INSULATING STRUCTURE FOR PUMP CHAMBER OF WATER JET PROPULSION BOAT
Document Type and Number:
Japanese Patent JP2003261097
Kind Code:
A
Abstract:
To reduce exhaust noise.
By providing a first shower duct 30 between an exhaust outlet 6a of the pump chamber 6 and an opening of an injection nozzle 26, and providing a second shower duct 31 in a neighborhood of the exhaust outlet 6a of the pump chamber 6, a curtain like shower of water is jetted from a nozzle 30c of the first shower duct 30 across the pump chamber 6, and at the same time, a curtain like shower of water is jetted from a nozzle 31c of the second shower duct across the exhaust outlet 6a.
Inventors:
YOSHIDA MITSUMORI
Application Number:
JP2002065622A
Publication Date:
September 16, 2003
Filing Date:
March 11, 2002
Export Citation:
Assignee:
YAMAHA MOTOR CO LTD
International Classes:
B63H11/08; B63B35/73; B63H21/14; B63H21/32; F01N13/12; (IPC1-7): B63H21/32; B63B35/73; B63H11/08; B63H21/14; F01N7/12
Attorney, Agent or Firm:
Etsushi Kotani (2 outside)