| 摘要 |
1,011,610. Tube coupling. IMPERIALEASTMAN CORPORATION. Oct. 11, 1963 [Oct. 11, 1962], No. 40317/63. Heading F2G. A tube coupling comprises a tube T receiving on one end a sealing ring 12, a body member 11 sealingly engaging with said ring and a first member 13 engaging the body member to deform the sleeve into sealing engagement with the tube. The sleeve 12 is flanged 21 at one end to abut the end 22 of the tube T and this end is received within a frustoconical bore of the body member on connection of the coupling. The body member carries a screw thread 27 co-operating with a thread on the first member or nut 13. On connecting the two members 11, 13 a cam surface 25 on the nut deforms the ring 12 such that teeth 24 on the ring bite into the tube. The nut 13 is provided with an outer extension 28 having a thread to receive nut 14 and having an inner cylindrical surface of larger diameter than the outside diameter of the tube. A thread 29 is provided on the inner surface of the extension 28 the teeth of the thread having a right triangular section with the surface 30 extending substantially perpendicular to the tube axis (Fig. 5). A series of slots 34 in the extension allows the extension to be deformed so that the thread 29 bites into the tube when a nut 14 having an internal tapered thread is screwed on to the extension. The nut 14 is provided with an inturned flange 35 to preclude entry of dirt into the fitting. Specification 978,899 is referred to. |
