Tubular article

Metal working – Method of mechanical manufacture – Assembling or joining

Patent

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Details

29235, 174135, H01R 500

Patent

active

048689670

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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