초록 ▼

The running board of the present invention provide the structural integrity to withstand the static and dynamic loads to which articles of this type are normally subjected. The design of the running board in terms of its configuration, the components making up the running board, namely, the blow mol

The running board of the present invention provide the structural integrity to withstand the static and dynamic loads to which articles of this type are normally subjected. The design of the running board in terms of its configuration, the components making up the running board, namely, the blow molded exterior shell and the foam core, have specific structural characteristics. For example, the foam core has a density in the range of 100 kg/m.sup.3 to 150 kg/m.sup.3 and has sufficient resiliency to permit the part to return to substantially its original shape following removal of a load of predetermined magnitude.

대표청구항 ▼

[ We claim:] [1.] A running board having an original shape comprising:an outer shell of molded plastic defining a cavity; anda core of polyurethane foam having a density in the range of 110 kg/m.sup.3 to 150 kg/m.sup.3, the foam having sufficient resiliency to permit the running board to return to s

[ We claim:] [1.] A running board having an original shape comprising:an outer shell of molded plastic defining a cavity; anda core of polyurethane foam having a density in the range of 110 kg/m.sup.3 to 150 kg/m.sup.3, the foam having sufficient resiliency to permit the running board to return to substantially its original shape following removal of a load of predetermined magnitude;the running board extending from a first end to a second end and having an upwardly facing portion positioned to receive a load placed thereon and a downwardly facing portion, wherein the running board, when supported by a plurality of brackets and when subjected to a 305 pound vertical load placed on the upwardly facing portion at a location on center between brackets, has a maximum deflection no greater than 15 millimeters and a maximum permanent set no greater than 5 millimeters.