| 摘要 |
The present invention comprises couplings which require no adhesives or cold welding or similar techniques for joining lengths of pipe of any known composition. The couplings, in their various shapes, are molded from Ultra high Molecular Weight Polyethylene (UHMWP). Within each end of each coupling form there are a plurality of spaced apart inwardly extending flexible rings, each ring terminating in an angular tip portion which is deformed in the direction of the inserted pipe end and forms a plurality of locking annular seals around the inserted pipe end portion, UHMWP has an inherent self-lubricity which facilitates the insertion of the pipe end portion. UHMWP is chemically inert.
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