Wrenches having two driving stems pivotally connected with each other
US6443039B1 · kind B1 · utility
5Cited by
5References
6Claims
0Family size
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Key dates
| Filing date | Aug 28, 2000 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Aug 28, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25G1/063
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A wrench having two driving stems pivotally connected with each other. One of the driving stems has a main stem and a female joint protruding from a rectangular or cylindrical section of the main stem with a hole at a center thereof. The other driving stem has the other main stem and a male joint projecting out of the center of a rectangular or cylindrical section of the main stem. The male joint and the female joint are engaged with each other via a coupler such as a roll pin. Therefore, without using an additional hinge or other mechanical coupler, these two driving stems are pivotally connected with each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.