| 摘要 |
A pipe coupling comprises two substantially cylindrical pipe end sections (1, 2) each terminating in a flange (3, 4), an annular sealing member (5) for sandwiching between opposed end faces (6, 7) of such flanges, and circumferential clamping means (8) adapted to generate, on tightening, forces which urge the flanges (3, 4) together along a common axis (9) to compress a sandwiched sealing member (5) to form a sealed joint. Each pipe end section is associated with a member (3, 10) which comprises castellations constituted by axially directed teeth (11) and indentations (12) for accommodating the teeth (11) of the other such member, which teeth (11) and indentations (12) are arranged so as to lie radially outside the sealing member (5) and are so shaped that (a) the teeth (11) are long enough in the axial direction that the castellations (11, 12) must be intercalated in order to allow compression of the sealing member (5) and sealing of the coupling, and (b) such compression of the sealing member (5) and sealing of the coupling can be achieved without the tops of the teeth (11) of one castellation bottoming out in indents (12) of the other castellation.
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