Device switch for electric hand-held tools
US6927353B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 2004 |
| Grant date | Aug 9, 2005 |
| Priority date | — |
| Expiry date | Jun 2, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H9/061
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device switch (2) for a hand-held tool, particularly for a screw drill or drilling machine, having a control device (50) which is arranged in a switch housing (4), a trigger (6) which is movably supported at the switch housing (4), the rotational speed of a driving motor (52) of the hand-held tool being controlled by the control device (50) depending on the position of the trigger (6) relative to the switch housing (4), and a pressure increasing arrangement (10) with a contacting area (14) on a contacting element (12) which makes pressing contact with a contact region (26) of a mechanical resistance element (24) in a trigger pressure position of the trigger (6) between a zero load position and a full load position, the displacement resistance of the trigger (6) being increased by this mechanical resistance element (24). The contact region (26) is arranged outside the switch housing (4).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.