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.]. .Iadd.a .Iaddend.polyamide material for increasing the strength of said hose assembly (10).Iadd.,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).Iaddend..   
     
     
       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. 
     
     
         . 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.]. .Iadd.1 .Iaddend.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.]. .Iadd.6,6.Iaddend.;   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; .Iadd.and .Iaddend.   
     
     
       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). 
     
     
          . 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. .Iadd.14.  An assembly as set forth in claim 1 further characterized by said polyamide 
     
     
        material of said outer liner (14) being expanded..Iaddend..Iadd.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)..Iaddend..Iadd.16. An assembly as set forth in claim 15 further characterized by said polymeric fluorocarbon material being chemically resistant to fuels and fuel additives..Iaddend..Iadd.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..Iaddend..Iadd.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)..Iaddend..Iadd.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)..Iaddend..Iadd.20. An assembly as set forth in claim 19 further characterized by said intermediate coating (28) essentially comprising a fluorocarbon material..Iaddend..Iadd.21. An assembly as set forth in claim 20 further characterized by said braided layer (26) comprising glass 
     
     
        fibers..Iaddend..Iadd.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..Iaddend..Iadd.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..Iaddend..Iadd.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)..Iaddend..Iadd.25. An assembly as set forth in claim 24 further characterized by said integral conductive means (16) including carbon black..Iaddend..Iadd.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..Iaddend.