| 摘要 |
A coupling member (1) for use in forming a spin-welded joint between adjacent ends (6, 7) of plastics pipes (8, 9) comprises an elongate sleeve (2) having a longitudinal bore (3), opposite ends (4, 5) of the bore (3) constituting sockets each to receive an end (6, 7) of two adjacent pipe lengths (8, 9) to be joined, with formations (12, 13) on the surface (11) of the bore (3) projecting radially inwardly of the bore (3), so as to result in positive contact between the formations (12, 13) of each socket and the external periphery (17, 18) of the pushed-in pipe end (6, 7), at least the surface (11) of the bore (3), and also the formations (12, 13), being formed from an appropriate plastics material compatible with the plastics material of the pipes (8, 9) to be joined, whereby, upon spinning the coupling member (10, a spin-welded joint may be effected. The invention also includes portable apparatus (19) for producing a spin-welded pipe joint comprising clamp members (20, 21) and a drive belt (27) engageable with a coupling member (1). |
