Hose coupling

Claim 1

A coupling comprising a first conduit having a first end portion; a second conduit having a second end portion with an external projection; a tubular connector having a first section concentric with and permanently bonded to said first end portion and extending into said second end portion, and a second section surrounding said first end portion and having at least one pallet releasably engaging said projection to hold said first section against extraction from said second end portion, said first end portion and said first section having coaxial internal surfaces with substantially identical diameters, the width of said pallet in the circumferential direction of said conduits decreasing in a direction from said second toward said first section, at least one of the parts including said first end portion and said first section containing a synthetic thermoplastic material, said first end portion containing an elastomeric material and being received in said second section in compressed condition, said second section having an annular flange which flares radially outwardly away from said first end portion and is integral with said pallet, said projection including a circumferentially extending rib having at least one passage and said pallet having an inner side provided with a tooth constituting a protuberance registerable with said passage to facilitate insertion of said first section into or extraction of said first section from said second end portion, said pallet including an arcuate portion which is integral with the end portion of said second section and a second portion extending in substantial parallelism with the axis of said connector and having an end portion provided with said protuberance, said protuberance engaging said rib and the thickness of the second portion of said pallet decreasing radially of said conduits in a direction from said second toward said first section, said rib having a first flank extending substantially radially of said second end portion and facing away from said first conduit and a second flank which tapers toward the common axis of said end portions in a direction away from said first flank, said protuberance having a first flank extending substantially radially of said conduits and engageable with said rib and a second flank tapering radially outwardly in a direction away from said first end portion; and annular sealing means remote from said flange and surrounding said first section in said second end portion, said sealing means comprising at least one external sealing lip engaging said second end portion.