Composite hose for conveying refrigerant fluids in automotive air-conditioned systems
AssigneeHarvard Industries, Inc.
InventorStephen Palinchak
Life of this patent
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Abstract
A composite hose for use in automotive air conditioning systems employing "Refrigerant 12" (dichlorodifluoromethane) including an innermost three-ply tube having an elastomer inner tube ply, a middle tube ply of a thermoplastic polymer bonded to the inner tube ply, and an outer tube ply of an elastomer bonded to the middle tube ply. At least one textile yarn, cord or fabric reinforcement layer surrounds the three-ply tube and a specially compounded elastomer cover overlies the textile reinforcement. Suitable adhesives maybe applied between the inner and middle tube and between the middle and outer tube to provide a consolidated, co-acting tube element. A hose fitting is attached to an end of the composite hose to form a hose assembly.
Claims17
A composite hose for conveying refrigerant fluids and lubricating fluids in automotive air conditioning systems, comprising:
- an innermost three-ply tube adapted to be in direct communication with said refrigerant fluids;
- a textile fiber reinforcing layer surrounding said three-ply tube;
- and
- a cover surrounding said reinforcing layer;
- wherein the three-ply tube comprises,
- an inner ply of an elastomer compound,
- a middle ply of a thermoplastic polymer bonded to the inner ply, and
- an outer ply of an elastomer compound bonded to the middle ply, and
- first and second adhesive layers respectively provided between said inner and middle plies and said middle and outer plies of said three-ply tube to bond the three plies of the three-ply tube together;
- said inner ply of the three-ply tube being an elastomer compound selected from the group consisting of nitrile-butadiene rubber (NBR), chloro-sulfonyl-polyethylene rubber (CSM), chloroprene rubber (CR), epichlorohydrin polymer (CO), epichlorohydrin copolymer (ECO), and chloropolyethylene (CM);
- said middle ply of the three-ply tube comprising a thermoplastic polyamide polymer;
- and
- said outer ply of the three-ply tube being an elastomer compound selected from the group consisting of chloroprene rubber (CR), chloro-sulfonyl-polyethylene rubber (CSM), ethylenepropylene copolymer (EPM), ethylene-propylene-diene terpolymer (EPDM), isobutene-isoprene rubber (IIR), bromo-isobutene-isoprene rubber (BIIR), chloroisobutene-isoprene rubber (CIIR), and chloropolyethylene (CM).
A hose assembly for conveying refrigerant fluids and lubricating fluids, in an automotive air conditioning systems, said hose assembly comprising:
- a composite hose having opposed ends and comprising an innermost three-ply tube adapted to be in communication with said refrigerant fluids, a textile reinforcing layer surrounding said three-ply tube, and an outermost cover surrounding said reinforcing layer;
- and
- a hose fitting attached to one end of the composite hose;
- wherein said three-ply tube of said composite hose comprises,
- an inner ply of an elastomer compound, a middle ply of a thermoplastic polymer bonded to the inner ply,
- an outer ply of an elastomer compound bonded to the middle ply, and
- first and second adhesive layers respectively provided between the inner and middle plies and the middle and outer plies of said three-ply tube to bond the three plies of said three-ply tube together;
- said inner ply of the three-ply tube being an elastomer compound selected from the group consisting of nitrile-butadiene rubber (NMR), chloro-sulfonyl-polyethylene rubber (CSM), chloroprene rubber (CR), epichlorohydrin polymer (CO), epichorohydrin copolymer (ECO), and chloro-polyethylene (CM);
- the middle ply of the three-ply tube comprising a thermoplastic polyamide polymer;
- and
- the outer ply of the three-ply tube being an elastomer compound selected from the group consisting of chloroprene rubber (CR), chloro-sulfonyl-polyethylene rubber (CSM), ethylene-propylene copolymer (EPM), ethylene-propylene-diene terpolymer (EPDM), isobutene-isoprene rubber (IIR), bromo-isobutene-isoprene rubber (BIIR), chloro-isobutene-isoprene rubber (CIIR), and chloro-polyethylene (CM).
Dependencies are inferred from the claim text.