# US 11,299,037 B2 · Plastic filler neck for vehicles > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,299,037 B2 - Document ID: US11299037B2 - Status: Granted - Kind: B2 - Application number: 16/942,387 - Filed: 2020-07-29 - Published: 2021-05-13 - Granted: 2022-04-12 - Earliest claimed: 2019-11-12 - Assignees: Hyundai Motor Company; Kia Corporation - Applicants: Hyundai Motor Company; Kia Motors Corporation - Inventors: Jin Ug Lee; Man Seok Oh; Jung Su Park; Chang Han Kim - Web page: https://patentgrep.com/patent/US11299037B2 ## CPC - B60K 15/04: Tank inlets (B60K15/077 takes precedence) - B29C 66/71: {characterised by the composition of the plastics material of the parts to be joined (welding bar compositions B29C65/125)} - B60K 15/035: characterised by venting means - B29K 2077/00: Use of {PA, i.e.} polyamides, e.g. polyesteramides {or derivatives thereof}, as moulding material - B60K 15/0406: {Filler caps for fuel tanks} - B60K 2015/03453: {for fixing or mounting parts of the fuel tank together} - B60K 2015/0346: {by welding} - B60K 2015/03493: {made of plastics} - B60K 2015/03538: {the venting tube being connected with the filler tube} - B60K 2015/03542: {Mounting of the venting means} - B60K 2015/0458: {Details of the tank inlet} - B60K 2015/047: {Manufacturing of the fuel inlet or connecting elements to fuel inlet, e.g. pipes or venting tubes} - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS ## Abstract A plastic filler neck for vehicles includes a fuel injection pipe, a retainer inserted and fastened into an internal space of a tip of the fuel injection pipe to support a refueling gun, a cap holder directly fastened to the tip of the fuel injection pipe by fusion, and an air drain casing mounted, by a mounting bracket, to an outer diameter portion of the cap holder fastened to the fuel injection pipe. ## Claims ### Claim 1 A plastic filler neck for vehicles, comprising: a fuel injection pipe; a retainer inserted and fastened into an internal space of a tip of the fuel injection pipe to support a refueling gun; a cap holder directly fastened to the tip of the fuel injection pipe by fusion; an air drain casing mounted to an outer diameter portion of the cap holder fastened to the fuel injection pipe, 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 a mounting bracket mounting the air drain casing, 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. ### Claim 2 (depends on 1) The plastic filler neck of claim 1, wherein the tip of the fuel injection pipe comprises a rectilinear tube having a predetermined length to function as a filler tube for insertion and mounting of the retainer, and a diagonal tube having a diameter reduced gradually from the rectilinear tube and integrally extending therefrom. ### Claim 3 (depends on 1) The plastic filler neck of claim 1, 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 by rotary fusion, in which heat is applied to the cap holder while the cap holder is rotated, such that the tip of the fuel injection pipe is pressed into an internal space of the rear end of the cap holder. ### Claim 4 (depends on 1) The plastic filler neck of claim 1, wherein the mounting bracket further comprises a folding hinge integrally connected between lower ends of the pair of tightening plates. ### Claim 5 (depends on 1) The plastic filler neck of claim 1, wherein the tightening groove has an arc shape so as to be pressed against an inner diameter of a rear end of the cap holder. ### Claim 6 (depends on 1) The plastic filler neck of claim 1, wherein each of the tightening plates has a vehicle body mounting hole formed for mounting with a vehicle body. ### Claim 7 (depends on 1) The plastic filler neck of claim 1, further comprising first and second bolting ends formed at sides of the mounting bracket and the air drain casing, the first and second bolting ends being pressed against and bolted to each other. ### Claim 8 A vehicle comprising: a vehicle body; and a plastic filler neck mounted to the vehicle body, the plastic filler neck comprising: a fuel injection pipe; a retainer inserted and fastened into an internal space of a tip of the fuel injection pipe to support a refueling gun; a cap holder directly fastened to the tip of the fuel injection pipe by fusion; and an air drain casing mounted to an outer diameter portion of the cap holder fastened to the fuel injection pipe, 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 a mounting bracket mounting the air drain casing, 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. ### Claim 9 (depends on 8) The vehicle of claim 8, wherein the fuel injection pipe comprises a polyamide material containing nanoclay and has a single layer structure in cross-section. ### Claim 10 (depends on 8) The vehicle of claim 8, wherein the tip of the fuel injection pipe comprises: a rectilinear tube configured to function as a filler tube for insertion and mounting of the retainer; and a diagonal tube having a diameter reduced gradually from the rectilinear tube and integrally extending therefrom. ### Claim 11 (depends on 8) The vehicle of claim 8, 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 by rotary fusion, in which heat is applied to the cap holder while the cap holder is rotated, such that the tip of the fuel injection pipe is pressed into an internal space of the rear end of the cap holder. ### Claim 12 (depends on 8) The vehicle of claim 8, wherein the mounting bracket comprises a folding hinge integrally connected between lower ends of the pair of tightening plates. ### Claim 13 (depends on 8) The vehicle of claim 8, wherein the tightening groove has an arc shape so as to be pressed against an inner diameter of a rear end of the cap holder. ### Claim 14 (depends on 8) The vehicle of claim 8, wherein each of the tightening plates has a vehicle body mounting hole formed for mounting with the vehicle body. ### Claim 15 (depends on 8) The vehicle of claim 8, further comprising first and second bolting ends formed at sides of the mounting bracket and the air drain casing, the first and second bolting ends being pressed against and bolted to each other. ### Claim 16 A plastic filler neck for vehicles, comprising: a fuel injection pipe comprising a polyamide material containing nanoclay and having a single layer structure in cross-section; a retainer inserted and fastened into an internal space of a tip of the fuel injection pipe to support a refueling gun; a cap holder directly fastened to the tip of the fuel injection pipe by fusion; an air drain casing mounted to an outer diameter portion of the cap holder fastened to the fuel injection pipe, 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 a mounting bracket mounting the air drain casing, 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. ### Claim 17 (depends on 16) The plastic filler neck of claim 16, wherein the tip of the fuel injection pipe comprises a rectilinear tube having a predetermined length to function as a filler tube for insertion and mounting of the retainer, and a diagonal tube having a diameter reduced gradually from the rectilinear tube and integrally extending therefrom. ### Claim 18 (depends on 16) The plastic filler neck of claim 16, 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 by rotary fusion, in which heat is applied to the cap holder while the cap holder is rotated, such that the tip of the fuel injection pipe is pressed into an internal space of the rear end of the cap holder. ### Claim 19 (depends on 16) The plastic filler neck of claim 16, wherein the mounting bracket further comprises a folding hinge integrally connected between lower ends of the pair of tightening plates. ### Claim 20 (depends on 16) The plastic filler neck of claim 16, wherein the tightening groove has an arc shape so as to be pressed against an inner diameter of a rear end of the cap holder.