Ishigaki Company Limited

Ishigaki Mechanical Industry Co., Ltd.

Shigaki Company Limited

Kazumitsu Oura

Eiichi Ishigaki

Takahiro Goto

Kazuhisa Ishimura

Takaharu Honda

Koji Ishimoto

A water jet propulsion type outboard motor which includes: a power source; a driving system; a housing; a curved tubular duct member; guide blades; and an impeller. The duct member is fixed to the housing on which the power source is mounted, and having a suction port and a discharge port. The guide blades are provided within the duct member in the vicinity of the discharge port of the duct member. The impeller is rotated by the driving system for transmitting a driving power of the power source, and has a spiral blade with outer peripheral edge thereof close to an inner peripheral face of the duct member, and outer peripheral distal end portion thereof extending toward the suction port.

Water jet propulsion type outboard engine

Water jet propulsion device for vessels

A vertical pump (1) having a single or plurality of helical blades (10, 11, 12) mounted on a forward end of a rotary drive shaft (2) of the pump. The pump is of nonblocked type in which the helical blade or blades (10, 11, 12) are disposed with superior balance with respect to the rotary drive shaft (2), and is wide in flow passage between blade portions of the helical blades. The pump is particularly suitable for sewage treatment or the like.

Pump having a single or a plurality of helical blades

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Kagawa, Japan

Kazumitsu Oura