Patent GB-765984-A (GB)
Title: Improvements in or relating to detachable hose coupling
Inventor: EBERHART ARTHUR HAROLD
IPC: A47L9/24
Filed: 1955-02-15
Abstract: 765,984. Hose couplings. WESTING- HOUSE ELECTRIC INTERNATIONAL CO. Feb. 15, 1955, No. 4461/55. Class 99(1) In a hose coupling particularly for a vacuum cleaner 10 and including spigot and socket members 16, 18, means for automatically latching those members together comprise a resilient member 26 disposed in an opening 24 in the wall 22 of the socket and lying partly within the confines of that wall, the spigot having an annular cam member 34 for deflecting the member 26 to permit insertion of the spigot into the socket, and the member 34 being provided with an abutment surface for engaging the member 26 to lock the members 16, 18 together; a manually-movable sleeve 42 carried by the spigot engages and deflects the member radially outward to allow withdrawal of the spigot. As shown, the socket 18 has a frusto-conical portion 23 and oppositely disposed, elongated openings 24 normal tu the axis of the socket, and the member 26 comprises a helically wound spring having the ends thereof threaded into each other to form a closed loop which is provided with sufficient tension to ensure that the portions 29, Fig. 2, of the spring received in the openings 24 extend inwardly of the latter in chordal fashion. A rubber ring 30 having a U-shaped cross-section is disposed about the spring 26 to seal the openings 24. The spigot 16 comprises a tube 32 fixedly received in the hose 12 and the annular cam member 34 attached to the free end of the tube has a cylindrical portion 38 and a frusto-conical portion 35 which nests with the portion 23 of the socket 18 and serves to limit the extent of insertion of the spigot into the socket. The sleeve 42 which is slidable on the tube 32 is provided with an annular recess 44 and an annular part 46 and is biased to a locking position by a helical compression spring 48 disposed between the end of the hose 12 and a reduced portion 50 of the sleeve; the distance which the sleeve is movable against the bias of the spring and to the unlocking position is limited by an annular member 49 carried on the inner surface of the sleeve and abutting the end of the hose. To connect the spigot 16 to the socket 18 the former is inserted into the latter until the member 36 abuts the portion 23 of the socket, the member contacting and deflecting the portions 29 of the spring 26 and those portions returning to their original position and into tangential contact with the recess 44 of the sleeve 42. The rear edge of the portion 38 abuts the portions 29 of the spring to prevent withdrawal of the spigot and the coupling is free to turn in response to a twisting force exerted on the hose. To disconnect the hose the sleeve is pulled back against the bias of the spring 48 to bring the portion 46 into engagement with the portions 29 and to deflect the latter outwardly, Fig. 3, and during the withdrawing movement of the spigot the chamfered rear edge 51 of the portion 38 is urged against the spring to deflect the latter further outwardly, Fig. 4, and thereby free the spigot from the socket.