Patent ID: 8997793
Filing Date: 2015-04-07
Classification: F02M,F16L

Abstract:
1. A tubing incorporated into a vehicle fuel tank system, comprising: an elongated and flexible tubular shaped body having an enclosing wall defining a hollow interior, said wall exhibiting, in cross sectional cutaway., pluralities of alternating inner and outer diameter spaced locations; said inner diameter locations including a first plurality of outwardly protruding and annularly extending ribs, said first plurality of ribs each further having a substantially “V” profile; said outer diameter locations exhibiting a second plurality of ribs annularly projecting outwardly beyond said first ribs, each of said second plurality of ribs including a pair of substantially radially outwardly extending and spaced apart sidewalls terminating in an inwardly concave end surface, said sidewalls and concave end surface defining an annular pocket projecting outwardly from said wall, said second plurality of ribs each further exhibiting greater linear and radial dimensions than said first plurality of ribs; and said alternating arrangement of first and second pluralities of ribs interacting with an inner airflow profile established within said body to retard the generation of sound associated with the airflow.