Screwdriver having a variable torque-limiting in-line drive
US6640674B1 · kind B1 · utility
37Cited by
20References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 21, 2002 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | May 21, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B23/1427
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A screwdriver of the type having a variable torque-limiting in-line drive with a handle having a cavity and a drive bit disposed in the cavity. Over-ride drive members are disposed in the cavity and a spring exerts a force on the drive members for transmitting only a maximum force to a bit in the screwdriver. Two adjustable controls are at a back end of the tool and they are used to apply a varying force to the spring and thus limit the amount of maximum torque to be transmitted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.