Hitachi Cable, Inc.

Yoshihiro Namekawa

Kenji Hirose

Hisanobu Kanamaru

Yoji Kobayashi

Hideki Hagiwara

Takeshi Natori

Norio Tanioka

Shigetaka Watanabe

Koji Ouchi

Hiroya Murakami

Tokuju Maeno

Ikuei Matsumura

Katsuhiro Aoyagi

Katsumi Shimizu

Satoshi Miyanaga

A method of manufacturing a hose coupling from an intermediate blank material, the hose coupling having an inner tube or tubular nipple portion, an outer tube or tubular sleeve portion and a head portion, all formed by plastic deformation from an intermediate blank material. The head portion is provided with a bore at an end opposite the end where the nipple portion and the sleeve portion are joined. In addition, the head portion is internally provided with a female thread and a conical seal portion.

Method of manufacturing a hose coupling from an intermediate blank material

A plastic hose suitable for conveying refrigerant in a liquid or gas phase, liquefied gas such as LPG, volatile liquids, or gases such as CO.sub.2, O.sub.2 or N.sub.2 having an impermeable layer or a barrier. The amount of permeation of the gas in the hose to the outside and the amount of permeation of moisture into the hose are limited to extremely small values.

Fluid conveying hose

Growing community of inventors

Ibaraki, Japan

Yoshihiro Namekawa