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Title: Process for manufacturing flexible hoses of elastomeric material having a cavity wall

Abstract: In the described process for the manufacture of reinforced hoses of elastomeric material having a hollow space in their wall, said hollow space is formed by means of a structural shape helically positioned between the two assemblies of layers which constitute in their whole the wall of the hose, and during curing the hollow space is filled with a material inert to curing, which is discharged in liquid state from the hollow space after curing.


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Inventors: Torghele, Flavio (Milan, IT)

Application Number: 479166
Filing Date: 1974-06-13
Publication_date: 1976-01-20
Assignee: Treg S.p.A. (Veniano, IT)
Primary Class(es): 156/143 138/134, 138/138, 138/148, 156/155, 156/156, 156/190, 156/195
Other Classes:
US Patent Ref:
2755216Jul, 1956Lemons156/155.
3762982Oct, 1973Whittington156/190.
3766949Oct, 1973Champleboux et al.138/133.
3821050Jun, 1974Ambrose et al.156/143.

Other Refs:
Primary Examiner: Drummond, Douglas J.
Assistant Examiner: Lewis, Basil J.
Attorney: Stevens, Davis, Miller & Mosher