Corrugated hose assembly

Abstract

According to the present invention, there is provided a hose assembly with an inner fluoropolymer layer having a smooth inner surface and an outer polyamide layer having an undulated surface.

1 - 13 . (canceled)  
     
     
         14 . A method of making a hose assembly including the steps of: forming a smooth inner fluoropolymer layer; forming an outer polyamide layer over the inner fluoropolymer layer while adhering said outer and inner layers together; and corrugating said outer polyamide layer.  
     
     
         15 . A method as set forth in  claim 14 , said first forming a smooth inner fluoropolymer layer.  
     
     
         16 . A method as set forth in  claim 14 , forming step being further defined as extruding the outer polyamide layer over the smooth inner fluoropolymer layer.  
     
     
         17 . The method as set forth in  claim 14 , further characterized by depositing at least one braided layer between said inner and said outer layers.  
     
     
         18 . The method as set forth in  claim 14 , further characterized by positioning an integral conductive strip in the inner layer which is co-extensive for the length of the inner layer for conducting electrical charges along the length of the inner layer.  
     
     
         19 . The method as set forth in  claim 14 , said corrugating step further defined as forming a spiral corrugation on the outer polyamide layer.  
     
     
         20 . The method as set forth in  claim 14 , said corrugation step further defined as forming a circular corrugation on the outer polyamide layer.  
     
     
         21 . A hose assembly comprising: 
 an inner fluoropolymer layer having an entirely smooth non-corrugated inner surface; and    an outer polyamide layer extruded about said inner layer, said outer layer having a corrugated outer surface, said hose assembly being used in a fuel line.    
     
     
         22 . An assembly as set forth in  claim 21 , further characterized by including at least one braided layer disposed on said outer layer.