Automotive fuel filler pipe housing with snap-over trim ring

Abstract: A fuel filler pipe housing (10) mountable on automotive body panels (20). The housing (10) includes generally a flange member (30) coupled to a body member (50) mountable on a surface of the body panel (20), and a trim member (40) coupled to the flange member (30) by a hinge (60). The trim member (40) is movable relative to the flange member (30) between a first position where the trim member (40) is disposed away from a surface (22) of body panel (20) and a second position where the trim member (40) is disposed toward the surface (22) of the body panel (20), whereby the trim member (40) is biased in one of the first and second positions. The housing (10) may be installed on the body panel (20) with the trim member (40) positioned away therefrom prior to applying paint thereto, whereafter the trim member (40) is positioned toward the body panel (20).

Description: BACKGROUND OF THE INVENTION The invention relates generally to automotive fuel filler pipe housings mountable on a mounting member according to claim 1 and a method for mounting such a housing upon an automotive body panel according to claim 14. Such a housing is known from U.S Patent No. 5,437,491 entitled "Fuel Door Housing" issued 1 August 1991 and assigned commonly herewith. It discloses a plastic fuel filler pipe housing with a flange portion mountable in an opening of a vehicle body panel, wherein the body panel includes a recessed mounting surface disposed about the opening thereof so that a hinged door of the housing is flush with an outer surface of the body panel. A capped end portion of the fuel filler pipe extends through the housing, and is accessible upon opening the housing door. The earlier application EP 0 922 601 A shows an automotive fuel filler pipe housing mountable on an automotive body panel, the housing comprising a flange member having an exterior side and an interior side coupleable toward the automotive body panel; a trim member having an interior side, an exterior side, and a distal end portion; a hinge coupling the trim member to the flange member so the distal end portion of the trim member extends from the flange member; the trim member movable relative to the flange member between a first position where the distal end portion of the trim member is positioned away from the flange member, and a second position where the distal end portion of the trim member is positioned toward the flange member, whereby the interior side of the trim member is positioned away from a surface of the automotive body panel in the first position and the interior side of the trim member is positioned toward the surface of the automotive body panel in the second position. Other fuel filler pipe housings do not include a hinged door, but merely provide a transition between the fuel filler pipe and the body panel, leaving the fuel cap exposed. The housing may provide some support for the fuel filler pipe, but the capped end portion thereof is designed generally to readily break away from the housing during impact to prevent fuel leakage. The housing may also collect and drain small amounts of fuel spillage during refueling, and may provide some aerodynamic streamlining and cosmetic contouring continuous with the body panel, particularly in passenger vehicles where styling is paramount. Automotive fuel filler pipe housings are installed generally after painting the automotive body panels to ensure that the housing and portions of the automotive body panel proximate the housing accommodating opening therein are painted completely. In some painting operations, the housing is suspended in a window opening of the auto body and painted therewith, then later mounted in the automotive body panel. Suspending the housing from the automotive body for painting, however, must be performed manually and is laborious. And mounting the housing on the body panel after painting poses a risk of damage to the painted finish during installation. It is desirable generally to install housings on the automotive body panels prior to applying finish coats of paint thereto. Primer coats in original equipment are applied by electro-deposition and baked at temperatures that will damage plastics, and thus plastic housing are installed after application of the primer. Past efforts to install housings before applying finish coats of paint, however, have met with limited success. One problem is a difficulty ensuring complete painting at an interface between the body panel and the housing, especially where the body panel is recessed. Another problem is that under changing temperature conditions, plastics tend to expand and contract at different rates than metal automotive body panels. This phenomenon often results in exposure of unpainted areas of the body panel, and more particularly to portions thereof adjacent the flange member of the housing when the body panel expands relative to the housing. This exposure is highly undesirable from a cosmetic standpoint, particularly where the unpainted portion is not covered by a housing door. Other housings used in other applications suffer from the same or similar problems. The present invention is drawn generally toward advancements in the art of housings and more particularly to automotive fuel filler pipe housings. It is an object of the invention to provide novel housings installable on mounting members, particularly in automotive body panel openings for housing fuel filler pipes that overcome problems in the prior art. It is also an object of the invention to provide novel housings useable for automotive fuel filler pipes having a trim member that conforms to mounting member contours, especially automotive body panel contours, and that permit installation of the housing on the mounting member prior to applying paint thereto. It is a more particular object of the invention to provide novel fuel filler pipe housings installable on automotive body panels. The housing comprises generally a flange member coupled to a body member mountable on the automotive body panel. A trim member is coupled to the flange member by a hinge, wherein the trim member is movable relative to the flange member between a first position away from an exterior surface of the automotive body panel and a second position toward the exterior surface of the automotive body panel, whereby the trim member is biased in one of the first and second positions. It is a related object of the invention to provide novel methods for installing fuel filler pipe housings on automotive body panels before applying paint thereto by mounting the housing on the body panel when the trim member is in a first position away from a surface of the body panel, applying paint to at least a portion of the body panel when the trim member is positioned away from the surface thereof, including applying paint to at least a portion of the body panel coverable by the trim member, and then moving the trim member to the second position toward the body panel after painting. It is another more particular object of the invention to provide novel fuel filler pipe housings installable on automotive body panels, wherein at least a flange member, a hinge, and a trim member thereof are formed of a unitary plastic material, and whereby the trim member is biased toward a first or second position relative to the flange member. These and other objects, aspects, features and advantages of the present invention will become more fully apparent upon careful consideration of the following Detailed Description of the Invention and the accompanying Drawings, which may be disproportionate for ease of understanding, wherein like structure and steps are referenced generally by corresponding numerals and indicators. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1a is a partial sectional view of a partially installed automotive fuel filler housing with a trim member according to an exemplary embodiment of the invention. FIG. 1b is another partial sectional view of a more completely installed housing with a trim member according to the exemplary embodiment of the invention. FIG. 2 is an enlarged sectional view of a portion of the trim member of FIGS. 1a and 1b according to an exemplary embodiment of the invention. FIG. 3 is an end plan view of the body member of FIGS. 1a and 1b. FIG. 4 is interior side plan view of the exemplary trim member of FIGS. 1a and 1b. DETAILED DESCRIPTION OF THE INVENTION FIGS. 1a and 1b illustrate a housing 10 mountable on a mounting member 20, and useable for housing fuel filler pipes, not shown, in automotive body panels. The mounting member 20 referenced in the exemplary and preferred embodiments is thus an automotive body panel with an exterior surface 22, but is representative more generally of any mounting member. The housing 10 comprises generally a flange member 30, a trim member 40 and a body member 50. The flange member 30 is coupled to the trim member 40 by a hinge 60, and is also coupled to the body member 50 to form the housing 10, which is mountable on the automotive body panel 20. The flange member 30 has an exterior side 32 and an interior side 34 facing, or coupleable toward, the automotive body panel 20. The flange member 30 may be mounted directly on the body panel 20, or coupled thereto by the body member 50, or a combination thereof as discussed further below. The exemplary body member 50 has an inlet opening 51 and an outlet opening 52, wherein the body member 50 is at least partially disposable in an opening 24 of the automotive body panel 20. FIG. 2 illustrates the trim member 40 having an interior side 42, an exterior side 44, and a distal end portion 46. The hinge 60 couples the trim member 40 and the flange member 30, and more particularly couples an inner portion 43 of the trim member 40 with an outer portion 33 the flange member 30 so the distal end portion 46 of the trim member 40 extends generally from the flange member 30. FIGS. 1a and 1b illustrate the trim member 40 movable relative to the flange member 30 between a first position where the distal end portion 46 of the trim member 40 is positioned generally away from the flange member 30 shown in FIG. 1a, and a second position where the distal end portion 46 of the trim member 40 is positioned generally toward the flange member 30 shown in FIG. 1b. In the exemplary embodiment, the distal end portion 46 of the trim member 40 is disposed axially beyond the exterior side 32 of the flange member 30 when the trim member 40 is in the first position, and the distal end portion 46 of the trim member 40 is disposed substantially radially about the flange member 30 when the trim member is in the second position. FIG. 1a illustrates the housing 10 installed partially on the automotive body panel 20 with the trim member 40 in the first position so that paint may be applied to at least a portion of the exterior surface 22 of the automotive body panel 20. According to this aspect of the invention, paint is applied to at least portions 23 of the automotive body panel exterior 22 subsequently coverable by the trim member 40 in the second position. FIG. 1b illustrates the trim member 40 moved to the second position toward the automotive body panel 20 after applying paint thereto, whereby the portions 23 of the exterior surface 22 covered by the trim member 40 are painted. The trim member 40 and automotive body panel 20 may thus expand and contract at different rates without exposing any unpainted areas of the automotive body panel exterior surface 22 that would otherwise be exposed during relative expansion and contraction therebetween if the automotive body panel 20 and trim member 40 were painted with the trim member in the second position. FIG. 4 illustrates the trim member 40 and hinge 60 both having an annular ring shape disposed about a portion of the flange member 30. In alternative embodiments, however, the trim member 40 is substantially ring shaped having an oval or other closed ended shape. The hinge 60 does not necessarily have the same shape as the trim member 40, which may be shaped irregularly to follow the contours of the body panel 20. Still more generally, the trim member 40 is not closed ended, and may have a curved or a linear edge defined by the distal end portion 46 thereof, thereby forming a flap movable between the first and second positions discussed above. FIGS. 1a, 1b and 2 illustrate the hinge 60 formed partially by a first recess 62 disposed between the trim member 40 and the flange member 30 on the exterior sides thereof, and partially by a second recess 64 disposed between the trim member 40 and the flange member 30 on the interior sides thereof, whereby the trim member 40 is biased in one of the first and second positions and snaps flexibly therebetween. The hinge 60 in the exemplary embodiments is continuous and close ended, but in alternative embodiments the hinge may comprise a plurality of discrete components, which are not continuous. In embodiments having open-ended trim members with a linear or curved edge defined by the distal end portion 46 thereof, the hinge 60 must generally be curved as it is defined between the flange member 30 and the trim member 40, thereby providing the snapping action required to bias the trim member in one of the first and second positions as discussed above. The hinge 60 is formed preferably of a flexible resilient material, whereby the trim member 40 is biased toward one of the first and second positions. In one embodiment, the flange member 30, the trim member 40 and the hinge 60 are a unitary member, which may be formed of a plastic material in a molding operation. Molding the trim member 40 in one of the first and second positions relative to the flange member 30 will bias the trim member 40 in one of the first and second positions and provide the desired snap action therebetween. FIG. 1a illustrates the interior side 42 of the trim member 40 in the first position disposed away from an exterior surface 22 of the automotive body panel 20, and FIG. 1b illustrates the interior side 42 of the trim member 40 in the second position disposed toward the exterior surface 22 of the automotive body panel 20, whereby the trim member 40 provides a continuous interface between the flange member 30 and the automotive body panel 20. The bias of the trim member 40 in the second position toward the automotive body panel also provides a tight fit that conforms with body panel 20 contours without gaps or space between the trim member 40 and the body panel 20, thereby providing a high quality styled finish, which is essential in most markets, particularly the passenger motor vehicle markets. FIG. 1b also illustrates a sealing member 70 disposed along the interior side 42 of the trim member 40 and the exterior surface 22 of the automotive body panel 20 to provide a seal therebetween. FIGS. 1a and 1b illustrate the body member 50 coupled to the automotive body panel 20, and FIGS. 1a, 1b, and 3 illustrate a plurality of resilient engagement members 56 protruding from the body member 50 and disposed about the outlet opening 52 thereof. The plurality of resilient engagement members 56 are generally engageable with the automotive body panel 20 to couple and retain the body member 50 at least partially in the opening 24 thereof. The resilient engagement members 56 include a stem portion 57 formed by adjacent recesses 58 in the body member 50, and a bevelled edge 59 engageable with the opening 24 of the automotive body panel 20 to flex the stem 57 inwardly, which permits installation of the body member 50 in the opening 24 thereof. FIG. 1a illustrates an engagement portion 55 of the resilient engagement members 56 seated on the exterior surface 22 of the automotive body panel 20 when the body member 50 is installed in the opening 24 thereof. The resilient members 56 are preferably breakable under predetermined stress and strain conditions to separate the housing 10 from the automotive body panel 40 during impacts as required by governmental and industry fuel systems safety regulations and standards. In the exemplary embodiment, the body member 50 and the plurality of resilient engagement members 56 are a unitary member, which is preferably formable from a plastic material in a molding operation. The dimensions and number of plastic material resilient members 56 may be designed to break or fail under predetermined stress and strain conditions occurring during impact with accurate predictability, which is necessary to comply with fuel system safety regulations and standards. FIG. 4 illustrates a plurality of curved flange portions 36 and a plurality of resilient tab members 37 protruding from the interior side 34 of the flange member 30. And FIGS. 1a and 1b illustrate one of the curved flange members 36 disposable in a recess 54 formed on an end portion 53 of the body member 50 when the flange member 30 is coupled thereto. FIG. 3 illustrates a continuous recess 54 disposed in the end 53 of the body member 50, and in alternative embodiment the recess 53 may be a plurality of discrete recesses corresponding to the curved flange portions 36. The resilient tab members 37 of the flange member 30 are generally engageable with the opening 24 in the automotive body panel 20 to retain the flange member 30 coupled thereto and to retain the flange member 30 assembled to the body member 50. FIGS. 1a, 1b and 4 illustrate the resilient tab members 37 having a resilient stem 38, a bevelled surface 39 engageable with the opening 24 in the automotive body panel 20 to inwardly flex the resilient tab members 37 as the flange member 30 is disposed therethrough and possibly assembled with the body member 50, which is preferably mounted therein previously as discussed above. The resilient tab members 37 also include a surface portion 35 engageable with an interior side 26 of the automotive body panel 20 to retain the flange member 30 in assembly therewith and with the body member 50. The curved flange members 36 of the flange member 30 also prevent the resilient engagement members 56 of the body member 50 from flexing inwardly and disengaging from the automotive body panel 20. The body member 50 includes recesses 55 on the end portion 53 thereof to accommodate the resilient tab members 37 of the flange member 30.

Claims: An automotive fuel filler pipe housing mountable on a mounting member, the housing (10) comprising: a flange member (30) having an exterior side (32) and an interior side (34) coupleable toward the mounting member (20); characterized by a trim member (40) having an interior side (42), an exterior side (44), and a distal end portion (46); a hinge (60) coupling the trim member (40) to the flange member (30) so that the distal end portion (46) of the trim member (40) extends from the flange member (30); the trim member (40) movable relative to the flange member (30) between a first position where the distal end portion (46) of the trim member (40) is positioned away from the flange member (30), and a second position where the distal end portion (46) of the trim member (40) is positioned toward the flange member (30), whereby the interior side (42) of the trim member (40) is positioned away from a surface (22) of the mounting member (20) in the first position and the interior side (42) of the trim member (40) is positioned toward the surface (22) of the mounting member (20) in the second position, means (37) for coupling an interior side (34) of the flange member (30) toward an exterior surface (22) of the mounting member (20) when the trim member (40) is in the first position. The housing of claim 1, wherein the distal end portion (46) of the trim member (40) in the first position is disposed axially beyond the exterior side (32) of the flange member (30), and the distal end portion (46) of the trim member (40) in the second position is disposed substantially radially about the flange member (30). The housing of claim 1 or 2, wherein the trim member (40) is substantially ring shaped and is disposed about a portion of the flange member (30). The housing of at least one of the preceding claims, wherein the flange member (30), the hinge (60), and the trim member (40) are formed of a unitary plastic member. The housing of at least one of the preceding claims, wherein the hinge (60) is formed partially by a first recess (62) between the trim member (40) and the flange member (30) on the exterior sides (32, 44) of the flange member (30) and the trim member (40), and the hinge (60) is formed partially by a second recess (64) between the trim member (40) and the flange member (30) on the interior sides (34, 42) of the flange member (30) and the trim member (40), whereby the trim member (40) snaps between the first position and the second position. The housing of at least one of the preceding claims, wherein the hinge (60) is curved and is formed of a flexible resilient material, whereby the trim member (40) is biased toward one of the first position and the second position. The housing of at least one of the preceding claims further comprising a sealing member (70) disposed along the interior side (42) of the trim member (40). The housing of at least one of the preceding claims further comprising a body member (50) having an outlet opening (52), the body member (50) at least partially disposable in an opening of the mounting member (20), the flange member (30) coupled to the body member (50). The housing of claim 8 further comprising a plurality of curved flange portions (36) and a plurality of resilient tab members (37) protruding from the interior side (34) of the flange member (36), the curved flange members (36) disposable in a recess (54) formed on an end portion (53) of the body member (50) when the flange member (30) is coupled to the body member (50), and the resilient tab members (37) engageable with the opening (24) in the mounting member (20) to retain the flange member (30) coupled to the body member (50). The housing of claim 8 or 9 further comprising a plurality of resilient engagement members (56) protruding from the body member (50) and disposed about the outlet opening (52) of the body member (50), the plurality of resilient engagement members (56) engageable with the mounting member (20) to mount the body member (50) at least partially in the opening (24) of the mounting member (20). The housing of at least one of the preceding claims further comprising said mounting member (20) with an exterior surface (22), the interior side (34) of the flange member (30) coupled toward the exterior surface (22) of the mounting member (20), whereby the trim member (40) is positioned away from the exterior surface (22) of the mounting member (20) in the first position and the trim member (40) is positioned toward the exterior surface (22) of the mounting member (20) in the second position. The housing of at least one of the preceding claims, wherein the flange member (30), the hinge (60), and the trim member (40) are formed of a unitary plastic member, whereby the trim member (40) is biased toward one of the first position and the second position. The housing of at least one of the preceding claims, characterised in that said mounting member (20) is an automotive body panel. A method for mounting a fuel filler pipe housing according to claim 1 on an automotive body panel, characterized in that the housing (10) has the hinge member (60) interconnecting the flange member (30) to the trim member (40) having the distal end portion (46), the trim member (40) movable relative to the flange member (30) between the first position where the distal end portion (46) of the trim member (40) is disposed axially beyond the exterior side (32) of the flange member (30), and the second position where the distal end portion (46) of the trim member (40) is disposed substantially radially from the flange member (30), the method comprising: moving the trim member (40) in the first position; coupling an interior side (34) of the flange member (30) toward an exterior surface (22) of the automotive body panel (20) when the trim member (40) is in the first position, whereby the interior side (42) of the trim member (40) is positioned away from the exterior surface (22) of automotive body panel (20); and moving the trim member (40) in the second position after the flange member (30) is coupled to the exterior surface (22) of the automotive body panel (20), whereby the interior side (42) of the trim member (40) is positioned toward the exterior surface (22) of the automotive body panel (20). The method of claim 14 further comprising applying paint to at least a portion of the exterior surface (22) of the automotive body panel (20) when the trim member (40) is in the first position, whereby paint is applied to at least a portion (23) of the exterior (22) of the automotive body panel (20) coverable by the trim member (40) in the second position, and moving the trim member (40) to the second position toward the automotive body panel (20) after applying paint. The method of claim 14 or 15 further comprising coupling a body member (50) at least partially in an opening (24) of the automotive body panel (20) before coupling the flange member (30) to the exterior surface (22) of the automotive body panel (20), and then coupling the flange member (30) to the body member (50). The method of claim 16 further comprising retaining the body member (50) coupled to the automotive body panel (20) with the flange member (30).

Inventors: PARKER ERIC G, PARKER, ERIC G.
Applicants: ILLINOIS TOOL WORKS, ILLINOIS TOOL WORKS INC.
Application year: 1998
Main classification: B60K15
IPC codes: B60K15, B05B15