Anti-rotation structure, a tube structure and a photographic support
US10451214B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2018 |
| Grant date | Oct 22, 2019 |
| Priority date | — |
| Expiry date | Oct 30, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16M2200/028
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An anti-rotation structure, a tube structure, or photographic support with the anti-rotation structure comprises a first tube including a first groove or a first rib axially thereof. A second tube fitting to the first tube having an exterior thereof comprises a corresponding second rib second groove to the first groove or the first rib. When the first tube moving relative to the second tube, the first rib or the second rib moves along the corresponding second groove or the first groove. The groove defines the movement of the rib when the first tube moves relative to the second tube to effectively ensure the movement between the first tube and the second tube in a linear or straight line direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.