Hose assembly

Abstract

A lightweight hose assembly (10) of the type adapted for conveying fuels and other corrosive fluids. The assembly (10) includes a tubular inner liner (12) comprising a polymeric fluorocarbon material resistant to chemical and heat degradation, and is characterized by including an outer liner (14) comprising an expanded polyamide material disposed about the inner liner (12). The assembly (10) further includes a conductive strip (30) formed along the inner liner (12) for dissipating electrical charges accumulating along the inner liner (12).

What is claimed:  
     
       1. A hose assembly (10) comprising: 
       a tubular inner line (12) and an outer liner (14) disposed about said inner liner (12), said inner liner (12) comprising a polymeric fluorocarbon material resistant to chemical and heat degradation, said assembly characterized by said outer liner (14) comprising an expanded  a polyamide material for increasing the strength of said hose assembly (10),wherein said inner liner (   12   )  includes an outer surface  (   20   )  having an irregular configuration  (   22   )  and said outer liner  (   14   )  includes an inner surface  (   24   )  in mating engagement with said outer surface  (   20   )  of said inner liner  (   12   )  to limit relative movement between said inner liner  (   12   )  and said outer liner  (   14   ).  
     
     
       2. An assembly as set forth in claim 1 further characterized by said polymeric fluorocarbon material being chemically resistant to fuels and fuel additives. 
     
     
       3. An assembly as set forth in claim 2 further characterized by said inner liner (12) including an outer surface (20) having an irregular configuration (22) and said outer liner (14) including an inner surface (24) in mating engagement with said outer surface (20) of said inner liner (13) to limit relative movement between said inner liner (12) and said outer liner (14). 
     
     
       4. An assembly as set forth in claim 2 further characterized by including at least one braided layer (26) disposed between said inner (12) and outer (14) liners. 
     
     
       5. An assembly as set forth in claim 4 further characterized by including an intermediate coating (28) dispersed in said braided layer (26) for securing said inner liner (12) to said outer liner (14). 
     
     
       6. An assembly as set forth in claim 5 further characterized by said intermediate coating (28) including an outer surface (29) having an irregular configuration (31) and said outer liner (14) including an inner surface (24) in mating engagement with said outer surface (29) of said intermediate coating (28) to limit relative movement between said inner liner (12) and said outer liner (14). 
     
     
       7. An assembly as set forth in claim 6 further characterized by said intermediate coating (28) essentially comprising a fluorocarbon material. 
     
     
       8. An assembly as set forth in claim 7 further characterized by said braided layer (26) comprising glass fibers. 
     
     
       9. An assembly as set forth in either claim  3   1 or 4 further characterized by said expanded  polyamide material of said outer liner (14) including a material selected from the group consisting of: 
       nylon 6;  
       nylon  6 . 6   6 , 6 ;  
       nylon 11; and  
       nylon 12.  
     
     
       10. An assembly as set forth in claim 9 further characterized by said polymeric fluorocarbon material of said inner liner (12) including a material selected from the group consisting of: 
       polytetrafluoroethylene;  
       perfluorinated ethylene-propylene;  
       perfluoralkoxy fluorocarbon resin; and  
       polyfluoroethylene.  
     
     
       11. An assembly as set forth in claim 10 further characterized by said inner liner (12) including an integral conductive means (16) coextensive with the length of said inner liner (12) for conducting electrical charges along the length of said inner liner (12). 
     
     
       12. An assembly as set forth in claim 11 further characterized by said integral conductive means (16) including carbon black. 
     
     
       13. An assembly as set forth in claim 12 further characterized by including a coupling means (18) adapted to engage the ends of said hose assembly (10) for interconnecting said hose assembly (10) to a flow of fluid. 
     
     
       14. An assembly as set forth in  claim 1  further characterized by said polyamide material of said outer liner (   14   )  being expanded.   
     
     
       15. A hose assembly (   10   )  comprising:    
         a tubular inner liner  (   12   )  and an outer liner  (   14   )  disposed about said inner liner  (   12   ) , said inner liner  (   12   )  comprising a polymeric fluorocarbon material resistant to chemical and heat degradation, said assembly characterized by said outer liner  (   14   )  comprising an expanded polyamide material for increasing the strength of said hose assembly  (   10   ).  
     
     
       16. An assembly as set forth in  claim 15  further characterized by said polymeric fluorocarbon material being chemically resistant to fuels and fuel additives. 
     
     
       17. An assembly as set forth in  claim 16  further characterized by including at least one braided layer (   26   )  disposed between said inner  (   12   )  and outer  (   14   )  liners.   
     
     
       18. An assembly as set forth in  claim 17  further characterized by including an intermediate coating (   28   )  dispersed in said braided layer  (   26   )  for securing said inner liner  (   12   )  to said outer liner  (   14   ). 
     
     
       19. An assembly as set forth in  claim 18  further characterized by said intermediate coating (   28   )  including an outer surface  (   20   )  having an irregular configuration  (   31   )  and said outer liner  (   14   )  including an inner surface  (   24   )  in mating engagement with said outer surface  (   29   )  of said intermediate coating  (   28   )  to limit relative movement between said inner liner  (   12   )  and said outer liner (     14   ). 
     
     
       20. An assembly as set forth in  claim 19  further characterized by said intermediate coating (   28   )  essentially comprising a fluorocarbon material.   
     
     
       21. An assembly as set forth in  claim 20  further characterized by said braided layer (   26   )  comprising glass fibers.   
     
     
       22. An assembly as set forth in  claim 15  further characterized by said expanded polyamide material of said outer liner (   14   )  including a material selected from the group consisting of:    
       
         nylon  6 ;  
       
       
         nylon  6 , 6 ;  
       
       
         nylon  11 ; and  
       
       
         nylon  12 . 
       
     
     
       23. An assembly as set forth in  claim 22  further characterized by said polymeric fluorocarbon material of said inner liner (   12   )  including a material selected from the group consisting of:    
       
         polytetrafluoroethylene;  
       
         perfluorinated ethylene - propylene;    
       
         perfluoroalkoxy fluorocarbon resin; and  
       
       
         polyfluoroethylene. 
       
     
     
       24. An assembly as set forth in  claim 23  further characterized by said inner liner (   12   )  including an integral conductive means  (   16   )  coextensive with the length of said inner liner  (   12   )  for conducting electrical charges along the length of said inner liner  (   12   ). 
     
     
       25. An assembly as set forth in  claim 24  further characterized by said integral conductive means (   16   )  including carbon black.   
     
     
       26. An assembly as set forth in  claim 25  further characterized by including a coupling means (   18   )  adapted to engage the ends of said hose assembly  (   10   )  for interconnecting said hose assembly  (   10   )  to a flow of fluid.   
     
     
       27. An assembly as set forth in  claim 1 , wherein said outer surface of said irregular configuration is etched for preventing relative movement between said inner  12  and outer  14  liners.  
     
     
       28. A assembly according to  claim 27  wherein said etched irregular configuration is more specifically defined as chemical etching, acid treatment, plasma treatment, corona discharge treatment or mechanical scuffing.