F - Mech Eng,Light,Heat,Weapons – 16 – J
Patent
F - Mech Eng,Light,Heat,Weapons
16
J
277/59
F16J 15/50 (2006.01) G01M 3/02 (2006.01)
Patent
CA 1053284
ABSTRACT OF THE DISCLOSURE A packing for use in a steel-pipe hydraulic testing apparatus includes an annular body made of resilient material and having an annular cut in its inner peripheral portion and a plurality of hard backing pieces of an arcuate shape fastened to the wall of the annular cut at a given circumferential spacing and extending in the radial direction. A plurality of adapter pieces are embedded in the inner peripheral walls of the annular body of the packing at a given circumferential spacing and are exposed to the annular cut. The aforesaid plurality of backing pieces are each slidable on the surfaces of a pair of adjoining adapter pieces. This packing is contracted due to a hydraulic pressure being applied to the outer periphery of the body of the packing, and as a result the respective adapter pieces will slide on the surfaces of the adapter pieces in the circumferential direction of the packing. Each backing piece is provided with a pair of cuts on diagonally-opposing paired corners thereof. The edges of the respective backing pieces may be overlapped one on top of another as viewed in the axial direction. The packing is particularly useful for the portion of the apparatus which must be main- tained watertight for the pipe.
261036
Furukawa Wataru
Sasaki Kazuo
Yamaguchi Takashi
Yoshida Mitsuo
Kabushiki Kaisha Yamamoto Suiatsu Kogyosho
Nihon Valqua Kogyo Kabushiki Kaisha
Sumitomo Kinzoku Kogyo Kabushiki Kaisha
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