Pipe inspection systems with asymmetric drag force bearings
US10907690B1 · kind B1 · utility
2Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 9, 2018 |
| Grant date | Feb 2, 2021 |
| Priority date | — |
| Expiry date | Jan 18, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/183
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An asymmetric bearing device automatically decreases, without the need for manual adjustment, an amount of friction exerted against rotation of a drum or other mechanism upon reversal of the direction of rotation of the drum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.