Method of producing a composite foam wire reinforced hose
AssigneeThe Gates Rubber Company
InventorsHerbert W. Gray, Roger A. Payne
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Abstract
A hose of improved impulse life is described including an inner polymeric tube which has a relatively hard outer surface, a tightly packed wire reinforcement e.g., braid or spiral, telescoped over the tube, and an expanded polymeric cushion matrix encapsulating at least a portion of the strands of the reinforcement and also promoting wire-to-wire and tube-to-wire adhesion. A method for producing the hose employing a foamable material applicator is also disclosed.
Claims10
A method for producing wire-reinforced hose comprising the steps of:
- forming a self-supporting polymeric tube;
- applying a coating of an expandable polymeric material onto the outer surface of the tube;
- twining a tightly packed sheath of stranded wire reinforcement over the coated tube;
- interspaces being defined between the reinforcement and tube and between individual strands of the reinforcement;
- and
- expanding the polymeric material into a cellular cushion matrix at least partially filling said interspaces.
A method for producing wire-reinforced hose comprising the steps of:
- extruding a self-supporting flexible polymeric tube;
- applying a liquid coating of an expandable polymeric material onto the outer surface of the tube;
- twining a tightly packed sheath of stranded wire reinforcement over the tube, interspaces being defined between the reinforcement and tube and between individual strands of the reinforcement;
- and
- expanding the polymeric material into a cellular cushion matrix at least partially filling said interspaces.
A method for producing wire-reinforced hose comprising the steps of:
- forming a self-supporting polymeric tube;
- applying a liquid coating of an expandable polymeric material onto the outer surface of the tube;
- twining a tightly packed sheath of stranded wire reinforced over the coated tube, interspaces being defined between the reinforcement and tube and between individual strands of the reinforcement;
- and thereafter
- expanding the polymeric material located between the tube and wire reinforcement into a cellular cushion matrix at least partially filling said interspaces.
A method for producing wire-reinforced thermoplastic hose comprising the steps of:
- extruding a self-supporting thermoplastic tube having a durometer (Shore A) of at least about 75 with a maximum internal diameter of about 2 inches;
- applying a coating of an expandable polymeric material onto the outer surface of the thermoplastic tube;
- telescoping at least one wire reinforcement layer over the tube substantially without imbedding the reinforcement in the outer surface of the tube, interspaces being defined between the wire reinforcement and tube and between individual wire strands of the reinforcement;
- thereafter
- expanding the polymeric material while positioned on the tube into a cellular cushion matrix at least partially said interspaces;
- and
- applying a protective cover over the reinforcement sheath after the polymeric material has undergone expansion.
Dependencies are inferred from the claim text.