| 摘要 |
<p>A pipe joint, which can be used (a) to repair a break or other damage to a pipe or (b) to provide for expansion and contraction of the pipe, thereby compensating for earth movements and temperature changes, comprises an outer sleeve (11) which is a first length of pipe of greater diameter than either of two pipes to be joined, the outer sleeve having a pre-moulded or "O"-ring seal (14) and seal retainer (15) on its inner surface adjacent one end thereof and an annular stop (16) on its inner surface adjacent the other end thereof; and an inner sleeve (12) which is a second length of pipe being substantially identical to the inner diameter of the "O"-ring seal (14). The inner and outer sleeves are slidably engageable, the limits of their relative movement being determined by the positioning of the stopped end of the inner sleeve (12) within the outer sleeve (11). Alternatively, the pre-moulded or "O"-ring seal (14) and retainer (15) are attached to the outer surface of the inner sleeve (in place of its annular stop (17)) instead of to the inner surface of the outer sleeve.</p> |
