Dead man-type electrical control device for power tools
US4857681A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1987 |
| Grant date | Aug 15, 1989 |
| Priority date | — |
| Expiry date | Dec 23, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2300/026
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control for an electrical tool, particulary of the garden tool type, comprises a housing containing an electrical switch having a projecting actuator and a handle assembly for switching the electrical switch from a deactivated condition to an activated condition by contact with the actuator. The handle assembly comprises an elongated handle projecting from the housing and pivotably attached to the housing by a pivot with one end of the handle adjacent to one side of the actuator. The handle assembly also includes an elongated trigger pivotably attached to the handle with an end projecting outside the housing and the other end adjacent to another side of the switch actuator. The handle further includes a spring biasing the handle and therefore the actuator towards the adjacent end of the trigger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.