Patent GB-1190859-A (GB)
Title: A Hose Coupling Device
IPC: F16L37/36
Filed: 1968-10-30
Abstract: 1,190,859. Hose couplings. ETABS. R. PONS ET COMPAGNIE. 30 Oct., 1968 [30 Nov., 1967], No. 51491/68. Heading F2G. A coupling device for transferring liquids comprises a filling connector 1 including a valve 11 and adapted to be connected at 3 to a filler hose which is connected at the other end thereof to a supply of liquid under pressure, and a truck unit 2 adapted to be stationarily mounted on a tanker vehicle and also having a valve 81, the connector 1 and unit 2 being each provided respectively with smooth-walled cylindrical end pieces 8, 72 provided with a seal 74, 76 and adapted to fit one within the other. The valves 11, 81 are coaxial with the end pieces 8, 72 the valve 11 being urged by a spring 31 inwardly against a seat 9 and the valve 81 being pressed against a seat 82 by springs 105. Means operable from the exterior of the device couple the valves temporarily in the closed position thereof, and means, also operable exteriorly of the device, are adapted to open one of the valves and consequently the assembly consisting of both coupled valves in opposition to the springs 31, 105 whilst fluid-tightly coupling the filling connector and truck unit. The filling unit 1 consists in a shell 6 formed with a filler duct 7 leading to a cylinder 18, a rotatable coupling rod 21 passing through the hollow stem 14 of the valve 11, a piston 17 and a counter plate 22 fixed to the rod and provided with pins 51 which are engageable in holes 52 in a plate 46 keyed to a shaft 44 and urged forwardly by a spring 58; the shaft is mounted in a friction ring 55 and carries a hand wheel 43, and the rod 21 has a screw-thread 41 for engagement within a screw thread 113 of the valve 81. The end piece 8 is protected by a bead 118 fitted with a covering strip 119 of plastics material. The diameter of the cylinder 18 is substantially equal to that of the valve seat 9 so that the assembly of the valve 11 and piston 17 is balanced hydraulically under the action of pressure fluid admitted to the duct 7, the valve therefore being applied to the seat by a pressure equal to that of the spring 31. For ease of manipulation handles 61, 62 are provided and a hole 64 enables the connector to be suspended from a hook. The truck unit 2 comprises a shell 71 formed with a connecting flange 116 and the end piece 72 has a bead 76 to contact the sealing ring 74. The valve head 81 is carried on a stem 86 mounting a piston 87 slidable in a cylinder 88 supported by ribs 89 and connected by a duct 111 to an external source of pressure fluid. Rotational locking of the valve head 81 is achieved by tubes 101 which enclose the springs 105 and are located in recesses 102 in the valve head and bores 103 in the cylinder. The unit may include a halfcoupling 121 adapted to fit between the end piece 8 and bead 118 and to connect with a half coupling fitted to a drain hose. In operation, the end pieces 8, 72 being engaged, by rotation of the hand-wheel 43 the rod 21 is screwed into the stem 86 of the valve 81 during which movement the bead 76 moves towards the seal 74. Opening of the valves simultaneously is achieved by admitting pressure fluid, via the duct 111, to the cylinder 88, the pins 51 being disengaged from the plate 46. Upon uncoupling, pressure fluid is released from the cylinder 88 so that the valves moved to the closed position thereof and the pins 51 again engage in the plate 46 whereby rotation of the hand wheel causes the rod 21 to be unscrewed from the stem 86 and enables the connector and unit to be drawn apart.