Patent ID: 8128130

Claim:
A plug-in hose coupling for a non-detachable connection of a tube or hose made of plastic or elastomeric material, said coupling comprising: a housing input part defining an interior and having a receiving bore formed therein; said receiving bore defining a plug-in opening for receiving an end of said hose and having an end region facing toward said interior and away from said plug-in opening and said receiving bore being widened in said end region thereof; a tubular support sleeve projecting concentrically into said interior and extending from said end region and said tubular support sleeve being adapted to accommodate said hose thereon when pushed into said receiving bore in a push-in direction; said support sleeve having an end stop for receiving the end of said hose thereagainst when pushed over said tubular support sleeve; said tubular support sleeve having an annular collar at one end thereof defining said end stop and said annular collar being configured to coact with said housing input part to sealingly clip said tubular support sleeve into said widened end region; said housing input part having an inner periphery at said end region; at least one annular seal bearing against said inner periphery in said widened end region; said annular seal being arranged concentrically in a space which is formed by said annular collar of said tubular support sleeve and the housing input part in the area of said widened end region of said receiving bore; an annular holding element bearing axially against said annular seal; said holding element being configured for the hose end of said hose pushed through said plug-in opening and into said receiving bore; said annular holding element being arranged concentrically in said space and bearing against said annular seal; said housing input part having an inner conical support surface in the area of said widened end region of said receiving bore with said inner conical support surface being tapered to narrow conically in a direction counter to said plug-in direction; said holding element being supported against said inner conical support surface; said holding element having an inner periphery and encircling cutting edges on said inner periphery for engaging the hose end; a fastening part having a throughflow bore aligned with said receiving bore; said fastening part being configured to attach said plug-in hose coupling to a motor vehicle unit; and, an overmold structure fixedly and directly joining said fastening part to said housing input part and said tubular support sleeve so as to provide a direct and uninterrupted seal-tight connection therebetween completely devoid of a separate sealing element.