Title: Electrically conducting plastic pipe system

Abstract: A conducting plastic pipe system comprising a male plastic pipe part and a female plastic pipe part with conducting covering layers which are interconnected by means of a conducting sealing ring between the male and female part. In case of outer covering layers on the pipe part the covering layer extends onto the inner side of the muff end of the female pipe part.

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Inventors: de Putter, Warner Jan (Hardenberg, NL)

Application Number: 647242
Filing Date: 1976-01-07
Publication_date: 1978-10-17
Assignee: Wavin B.V. (Zwolle, NL)
Primary Class(es): 138/145 138/155, 174/47, 285/55, 285/918, 361/215
Other Classes:
US Patent Ref:

1867984	Jul, 1932	Pistor	138/145.
2798509	Jul, 1957	Bergquist	138/145.
3187071	Jun, 1965	Radiejowski	174/102.
3288171	Nov, 1966	Hucks	138/145.

Other Refs:
Primary Examiner: Smith, Robert I.
Assistant Examiner:
Attorney: Wilkinson, Mawhinney & Theibault