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Fluorocarbon hose assembly including integral foamed fluorocarbon layer
| Details |
Inventors: Martucci, Norman S.;
Assignee: Teleflex Incorporated (Plymouth Meeting, PA)
Primary Examiner: Bryant, III; James E.
Assistant Examiner:
Attorney, Agent or Firm: Kohn & Associates
A lightweight hose assembly of the type adapted for carrying fuels and other corrosive fluids. The assembly (10, 110, 210) includes a tubular member (11, 111, 211) and coupling members (20). The tubular member (11, 111, 211) includes an inner liner (12, 112, 212) of a fluorocarbon polymer. The assembly (10, 110, 210) further includes an outer layer (14, 114, 214) of closed cell fluorocarbon polymer foam. A conductive strip (16, 116, 216) is formed on the inner liner (12, 112, 212) for dissipating electrical charges accumulated in the inner liner (12, 112, 212). A fabric braided layer (118, 218) may be disposed about the exterior of the inner liner (112) or the outer foam layer (214) respectively for adding strength to the assembly (10). |
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DETAILED DESCRIPTION OF THE DRAWINGS A hose assembly made in accordance with the instant invention is generally shown at 10 is FIG.
1.
The assembly 10 includes a tubular member, generally indicated at 11, and a coupling means, generally indicated at 20, for connecting the ends of the tubular member 11 to fittings for conducting fluid therethrough.
The tubular member 11 includes an inner organic polymeric liner 12.
The liner 12 is preferably extruded and has a wall thickness of between 0.
003 and 0.
012 inches.
The inner liner 12 is made of a fluorocarbon polymer.
Specifically, the inner liner is made of the polymer of tetrafluoroethylene (PTFE), the polymer of fluorinated ethylene propylene (FEP), the polymer of perfluoroalkoxy resin (PFA), or the polymer of ethelyne-tetrafluoroethylene (ETFE).
The fluorocarbon polymers PTFE, FEP, PFA are sold under the trademark TEFLON by Dupont.
The polymer ETFE is sold under the trademark TEFZEL by Dupont.
The inner liner 12 is impervious to fluid flow through the wall.
Since the inner liner is preferably made of a fluorocarbon polymer material, it is resistant to heat and chemical degradation.
This allows a variety of fluids to pass through the interior of the liner 12 without corroding the liner 12.
The tubular member 11 further includes an outer organic polymeric layer 14.
As shown in the Figures, the outer layer 11 is integrally with the inner layer 12.
As shown in the figures, the outer layer 14 is integrally connected with the inner layer 12.
By integral, it is meant that the outer layer 14 is connected to the inner layer 12, forming a single layer between the fluorocarbon polymers comprising each layer 12, 14.
The opposing surfaces of the hose assembly layers, i.
e.
, the outer surface of the inner liner 12 and the inner surface of the outer layer 14, blend or fuse to produce the connection between the layers, thereby forming an intergral tubular member 11.
The outer layer 14 preferably has a wall thickness of between 0.
010 inches and 0.
030 inches
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Manufacturing Materials 
