Tubular article
US5070597A · kind A · utility
115Cited by
35References
52Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1989 |
| Grant date | Dec 10, 1991 |
| Priority date | — |
| Expiry date | Jun 20, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1386
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.