End fittings for conduits

Claim 1

An end fitting for a conduit of the kind having a convoluted tube and an outer reinforcing sheath comprising, a tubular member having a first portion adjacent one end thereof that includes means for co-operating with the convoluted tube of said conduit to facilitate screwing of the first portion into the bore of said convoluted tube, a second portion remote from the said one end of the tubular member defining a frusto-conical surface which gradually tapers inwardly away from the said one end and which is to receive the outer sheath of the conduit therearound, a third portion intermediate said first and second portions which defines a generally plain cylindrical surface of less overall diameter than the first and second portions around which convolutions of the convoluted tube of the conduit adjacent its end are to be received and a radially-extending shoulder adjacent the second portion against which the end of the convoluted tube is to abut, and means for clamping the sheath against the said tapered frusto-conical surface of the second portion, said clamping means comprising an annulus which extends around the tapered frusto-conical surface of the second portion of the said tubular body and which is deformable so as to reduce its internal diameter and conform with said frusto-conical surface, thereby to clamp the sheath of the conduit against the frusto-conical surface.