PURPOSE: To prevent a vibration out of an engine from being propagated to a hull, by forming a vibro-controlling material layer, made up of ferrite as a main component, in an engine room and a steersman seat of a glassfiber reinforced plastic hull.
CONSTITUTION: A vibro-controlling material layer 5 made up of ferrite as a main component is formed in a bottom surface, peripheral sides of an engine room 4, where an engine 2 is set up, and a steersman seat 3 of a plastic hull 1. As for the vibro-controlling material layer in the concrete, a ferrite compound material made up of mixing ferrite particles in such resin materials as polyester, polypropylene, epoxide resin or the like and of about 1.5W4.0×103kg/m3 in density is used. With this constitution, vibration out of the engine 2 is effectively preventable from propagation to a hull body.
YOKOYAMA KENJI
FUJII YASUMASA
TOMINAGA KAORU
MITSUI SEKIYU KAGAKU EPOXY KK
Next Patent: HYDRAULIC ON-OFF GEAR FOR HATCH COVER