Toyoda Koki Kabushiki Kaisha

Yamasei Kogyo Co., Ltd.

Mikio Nakajima

Yoshiyuki Takeuchi

Yoshiyuki Toyama

Syuzi Takagi

Hirotune Suzuki

A pressurized fluid supply hose which conducts pressurized fluid discharged from a pump to a fluidically operated device is disclosed. A spiral tube formed by two spirally wound band members is fixed by caulking in one end of a steel pipe. The outer shape of the one end of the steel pipe includes a taper portion formed to slope gradually between a thin portion and an outer diameter portion. By effecting a caulking process with a caulking tool having a pressing portion extending in parallel to an outer surface of the steel pipe, the outer taper portion of the steel pipe is contracted to formed an inner taper portion at an internal surface thereof, and one end of the spiral tube is fixed to the inner taper portion. Because the spiral tube is gradually deformed along the inner taper portion of the steel pipe, it can avoided that a large clearance is formed between the two band members of the spiral tube.

Growing community of inventors

Nagoya, Japan

Mikio Nakajima