Abstract: A cutting device of cutting a soft honeycomb mold body in a cutting direction perpendicular to an axial direction of the honeycomb mold body. A cutting device has a wire, a tension supply part and a pair of ultrasonic generators. The wire has a contact part which is stretched and in contact with the honeycomb mold body when the honeycomb mold body is cut. The tension supply part supplies tensile to the contact part when the honeycomb mold body is cut. The pair of ultrasonic generators have respective vibrator terminals arranged in contact with the contact part of the wire. The ultrasonic generators generate ultrasonic vibration in the cutting direction and supply the generated ultrasonic vibration directly to the wire.

Abstract: A cutting device of cutting a soft honeycomb mold body in a cutting direction perpendicular to an axial direction of the honeycomb mold body. A cutting device has a wire, a tension supply part and a pair of ultrasonic generators. The wire has a contact part which is stretched and in contact with the honeycomb mold body when the honeycomb mold body is cut. The tension supply part supplies tensile to the contact part when the honeycomb mold body is cut. The pair of ultrasonic generators have respective vibrator terminals arranged in contact with the contact part of the wire. The ultrasonic generators generate ultrasonic vibration in the cutting direction and supply the generated ultrasonic vibration directly to the wire.

Abstract: 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.

Abstract: A water jet propulsion type outboard motor (1) which includes: a power source (2); a driving system; a housing (3); a curved tubular duct member (5); guide blades (22); and an impeller (14). The duct member (5) is fixed to the housing (3) on which the power source (2) is mounted, and having a suction port (9a) and a discharge port (11a). The guide blades (22) are provided within the duct member in the vicinity of the discharge port (11a) of the duct member (5). The impeller (14) is rotated by the driving system for transmitting a driving power of the power source (2), and has a spiral blade (20) with outer peripheral edge thereof close to an inner peripheral face of the duct member (5), and outer peripheral distal end portion thereof extending toward the suction port (9a).