DISPOSITIF POUR LA FERMETURE DE TUBES METALLIQUES A PAROIS MINCES ET EN PARTICULIER DE TUBES A BASSE RESISTANCE MECANIQUE

摘要

978,377. Pipe stoppers. EUROPEAN ATOMIC ENERGY COMMUNITY (EURATOM). April 3, 1963 [April 4, 1962], No. 13264/63. Heading F2P. [Also in Division G6] In a device for closing the end of a tube 1, e.g. a nuclear reactor fuel element can, an internally tapered, expandible collet 2 is expanded against the inside of the tube by an externally tapered, collet-expanding element 3 movable axially of the collet, and a support ring 5 surrounds the tube externally in the region of the collet. As shown, the aluminium collet is formed with slots 8 and has a curved end portion 7 which is flattened to form a fluid seal against the lip 6 of the ring 5; alternatively, the collet has a single helical slot.