Flexible hose constructions and methods of making the same

Details Flexible hose constructions and methods of making the same Flexible hose constructions and methods of making the same

F - Mech Eng,Light,Heat,Weapons

16

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F16L 11/112 (2006.01) B29C 63/18 (2006.01) B29D 23/00 (2006.01) B29D 23/18 (2006.01) F16L 11/115 (2006.01) B29C 47/00 (2006.01) B29C 53/58 (2006.01)

Patent

CA 2066257

Methods are provided for providing novel flexible hose constructions. In one embodiment, the improvement includes the steps of forming an inner corrugated hose of polymeric material to have a plurality of outwardly convex projections with recesses therebetween, then disposing an outer sleeve of reinforcing material in telescoping relation on the inner hose, and then disposing an outer sleeve of polymeric material in telescoping relation on the sleeve of reinforcing material. A tube of polymeric material is disposed between the sleeve of reinforcing material and the inner hose by extruding the tube onto the inner hose before disposing the sleeve of reinforcing material thereon. The inner hose is formed with an outer layer of one thermoplastic material and an inner layer of a different thermoplastic material. The tube is formed from the same thermoplastic polymeric material that forms the outer layer of the inner hose. The outer sleeve is formed of the same thermoplastic polymeric material that forms the tube by the steps of extruding to cause the tube to be bonded to the projections of the inner hose. The bonding of the sleeve of polymeric material is caused to be bonded to the tube of polymeric material through the sleeve of reinforcing material by extruding the sleeve of polymeric material onto the sleeve of reinforcing material. One embodiment of the flexible hose construction of this invention comprising an inner corrugated hose which is made of polymeric material and which has a plurality of outwardly convex projections with recesses therebetween which extend from one end thereof to the other end thereof. An outer sleeve of reinforcing material is disposed in telescoping relation on the inner hose, and a tube of polymeric material is disposed between the sleeve of reinforcing material and the inner hose and extends into a generally-straight-line manner from projection to projection of the inner hose. In this way the flexibility characteristics of the inner hose is not substantially reduced.

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