US 12,252,005 B2
Plastic filler neck for vehicles
Jin Ug Lee, Gyeonggi-do (KR); Man Seok Oh, Yongin-si (KR); Jung Su Park, Seoul (KR); and Chang Han Kim, Gwangju (KR)
Assigned to HYUNDAI MOTOR COMPANY, Seoul (KR); and KIA CORPORATION, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed on Mar. 11, 2022, as Appl. No. 17/692,914.
Application 17/692,914 is a division of application No. 16/942,387, filed on Jul. 29, 2020, granted, now 11,299,037.
Claims priority of application No. 10-2019-0143963 (KR), filed on Nov. 12, 2019.
Prior Publication US 2022/0194217 A1, Jun. 23, 2022
Int. Cl. B60K 15/04 (2006.01); B29C 65/00 (2006.01); B60K 15/035 (2006.01); B29K 77/00 (2006.01)
CPC B60K 15/04 (2013.01) [B29C 66/71 (2013.01); B60K 15/035 (2013.01); B29K 2077/00 (2013.01); B60K 2015/03538 (2013.01); B60K 15/0406 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of forming a plastic filler neck for vehicles, the method comprising:
providing a fuel injection pipe comprising a polyamide material containing nanoclay and having a single layer structure in cross-section;
inserting and fastening a retainer into an internal space of a tip of the fuel injection pipe to support a refueling gun;
directly fastening a cap holder to the tip of the fuel injection pipe, wherein an inner diameter surface of a rear end of the cap holder and an outer diameter surface of the tip of the fuel injection pipe are integrally fused to each other; and
mounting an air drain casing to an outer diameter portion of the cap holder fastened to the fuel injection pipe using a mounting bracket,
wherein the air drain casing includes:
a seating groove formed on its bottom to be pressed against an outer diameter surface of the cap holder;
a locking protrusion formed on its front; and
an air inlet formed on its rear surface and configured to communicate with outside air, and
wherein the mounting bracket comprises a pair of tightening plates, each tightening plate having a tightening groove formed on its inner side to be pressed against the outer diameter surface of the cap holder and a locking groove formed at its upper end for fastening with the locking protrusion of the air drain casing.