Spanner with prevention of disengagement of fasteners
US7673542B2 · kind B2 · utility
2Cited by
17References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2008 |
| Grant date | Mar 9, 2010 |
| Priority date | — |
| Expiry date | Apr 8, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B23/0071
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A spanner comprises a box end that has an inner periphery consisting of a number of wall faces to define a first polygonal receiving space. Each wall face includes a groove defined therein. The grooves of the wall faces together define a second polygonal receiving space. At least one of the grooves includes a closed first end and an open second end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.