Method and layering for convoluted hose
OwnerRoy Herron, Stephen Mountford +2inventors
InventorsRoy Herron, Stephen Mountford, Thomas Dove, Wei Lan
Life of this patent
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Abstract
An improved flexible hose is described. The flexible hose may have a helical wire core with at least one thermoplastic layer over the core forming the hose. The helical wire forms a plurality of peaks separated by adjacent valleys on the hose. The peaks have a protective strip over the peaks that may extending along the peaks on the hose. The protective strip covers substantially only the peaks while leaving a major portion of the valleys uncovered by the strip.
Claims15
An improved flexible hose, said flexible hose being comprised of a helical wire, said helical wire having disposed thereon at least one thermoplastic layer forming said hose, said helical wire forming a plurality of peaks separated by adjacent valleys, said peaks having thereon a protective strip, said protective strip extending along the peaks on the hose, said protective strip covering said peaks while leaving a major portion of said valleys uncovered by said strip.
A flexible hose construction comprising a corrugated hose made of at least one layer of a polymeric material, said polymeric layer having a plurality of outwardly convex projections with recessed portions therebetween, said outwardly convex projections being formed by a helically wound material under said polymeric material, said outwardly convex projection having a protective strip thereon, said recesses being substantially uncovered by said protective strip.
A method for assembling a hose onto a wire of a coil spring comprising the steps of:
- a) providing a coil spring, said spring having a first end and a second end and a middle portion between said first and second ends;
- b) placing said spring into an assembly fixture such that the first end of the wire of the spring is accessible, at least one winding being proximal to said first end of the wire of the spring;
- c) extruding a thermoplastic polymer material over said spring to form a flexible hose, said flexible hose having a plurality of peaks separated by adjacent valleys, said peaks being formed by said coil spring;
- d) applying a protective strip over the peaks of said flexible hose such that a substantial portion of each adjacent valley is uncovered by said strip.
Dependencies are inferred from the claim text.