Helically formed cylinder of varying length and diameter
US6904941B2 · kind B2 · utility
17Cited by
40References
24Claims
0Family size
Inventor
Key dates
| Filing date | Sep 18, 2002 |
| Grant date | Jun 14, 2005 |
| Priority date | — |
| Expiry date | Sep 18, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J10/04
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A variable diameter cylinder made from a sheet having first and second edges that are opposite to each other and that slideably connect with each other to form a helical joint of a cylinder such that sliding the edges of the sheet along the joint varies a diameter and length of the cylinder. When marked with a scale, the cylinder acts as a measuring device that is both highly accurate and easy to use. A helical-based scale can be used alone, or a linear scale can be used in combination with a Vernier scale.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.