Portable electric tool
US5002135A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1989 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Jul 11, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01G3/037
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A portable electric tool, such as, for example, shears or secateurs suitable for pruning and/or harvesting work, comprises at least one moving working component disposed at the front and of a hollow frame one part of which forms the handle of the tool and inside which are housed an electric motor and a speed reducer. The outlet of the speed reducer is connected to the moving working component by means of a transmission system which comprises a moving gear unit. The tool also includes a trigger which protrudes outside the frame and operates an electric control device. The trigger and the electric control device are connected to the moving gear unit of the moving working component and follow the movements of the component. The trigger and the control device can occupy different relative positions, so that each movement made by the trigger from a neutral position, activates the control device, which in turn starts the electric motor to move the whole unit: i.e. the moving gear unit, the trigger, and the control device which then returns automatically to the neutral position at which the trigger is immobilized either by the limit stops, or manually.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.