Importance

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Abstract

A spigot coupling (5; 20; 30; 40) to an externally-threaded tubular end-fitting (7; 21) of a hose (6), is formed with a circumferential bead (3; 23) at an intermediate location of the length of the spigot (2; 24) entered into the end-fitting through an internally-threaded nut (12) and an elastomeric ring (13). Internal threads (16) of the nut are engaged with the externally-threaded head (8; 29) of the end-fitting to screw the nut onto the end-fitting with the elastomeric ring squeezed circumferentially between the head and an inclined face (15) of an internal shoulder of the nut. This secures the spigot to the end-fitting and establishes a fluid connection with the hose. Where the spigot (24) is of extended length it may project further into the end-fitting (21) through a further elastomeric ring (25) trapped inside the end-fitting. The spigot (31; 41) may have a frusto-conical distal-end (32; 42) with a shoulder (33; 47) instead of the bead for providing the squeezing action onto the inclined face (39; 44). The end-fitting of one coupling (40) may be an adaptor (46) that enables a screw-threaded connection to the spigot.

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First Claim