Title:
FILLER PIPE AND FILLER PIPE MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2022/054575
Kind Code:
A1
Abstract:
Provided is a filler pipe capable of suppressing swelling deformation caused by fuel, and a filler pipe manufacturing method. A resin filler pipe 1 has a bellows section 12, comprising peaks 121 and valleys 122, and an ordinary section 11, not comprising the bellows section 12, and is provided with at least inner layers 61, 62, barrier layers 41, 42, and outer layers 21, 22. In the ordinary section 11, the inner layer 61 is thinner than the outer layer 21, and the rate of increase in the proportion of the inner layer in the peaks 121 of the bellows section with respect to the proportion of the inner layer in the ordinary section 11 is equal to or less than the rate of increase in the proportion of the outer layer in the peaks 121 of the bellows section with respect to the proportion of the outer layer in the ordinary section 11.
Inventors:
HANAHARA HIROSHI (JP)
HIROHARA TAKESHI (JP)
KOYAMA TADASHI (JP)
HIROHARA TAKESHI (JP)
KOYAMA TADASHI (JP)
Application Number:
PCT/JP2021/031117
Publication Date:
March 17, 2022
Filing Date:
August 25, 2021
Export Citation:
Assignee:
YACHIYO IND CO LTD (JP)
International Classes:
B60K15/04; B29C53/30; F16L11/11
Domestic Patent References:
| WO2012115224A1 | 2012-08-30 |
Foreign References:
| JP2007046772A | 2007-02-22 | |||
| JP2017065663A | 2017-04-06 | |||
| JP2018118498A | 2018-08-02 | |||
| JP2007292299A | 2007-11-08 | |||
| JPH03117794A | 1991-05-20 |
Attorney, Agent or Firm:
ISONO INTERNATIONAL PATENT OFFICE, P.C. (JP)
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