Tubular article

Metal working – Method of mechanical manufacture – Electrical device making

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428 349, 428 351, 428 357, 428 368, 138103, 174 84R, 285 97, H01B 1900

Patent

active

050705970

ABSTRACT:
A double-walled article in the form of a tube having a small volume filling of a friction-reducing liquid or solid between its two walls. The article is able to revolve over a substrate by relative sliding motion between its two walls, to provide environmental or electrical protection.

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29th Intr Wire & Cable Symposium Proceedings, 1980, pp. 151.158, Conf. Proceeding Cherry Hill, N.J., by K. Yokoyama et al.

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