Tape measure device and method of manufacturing blade therefor
US7490500B2 · kind B2 · utility
3Cited by
18References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2007 |
| Grant date | Feb 17, 2009 |
| Priority date | — |
| Expiry date | Feb 9, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B3/1003
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A tape measure device has an elongated blade with a central concave-convex segment with at least one planar segment adjoining edgewise the central concave-convex segment to form a junction that extends substantially along the entire length of the elongated blade. During formation of the blade the junction is annealed to avoid formation of a flaw or incipient fracture along the junction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.