Dowell & Dowell
Swivel hose coupling with threaded nipple
 A swivel coupling for terminating the end of a hose made of resilient material, the coupling having a tubular nipple with a barbed hose receiving portion at one end and a cylindrical end extending from the hose and having an O-ring seal extending therearound, and the coupling including a screw threaded fitting surrounding the cylindrical end of the nipple and sealed thereto by the O-ring and having an annular abutment adjacent to the hose, and the coupling further including an annular collar, separable into sectors in the form of shell portions which surround the hose and squeeze it against the barbed nipple, the collar having a grooved structure overlying the annular abutment of the screw fitting and retaining the fitting close to the hose while permitting it to swivel with respect to its axis, and the nipple having female wrench flats in its outer end and having external screw threads at its inner end beyond the barbed portion whereby the nipple can be screwed into the hose bore after the screw fitting and collar have been assembled to it. 
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inventional inventional inventional inventional
Sergio
Campanini