Branch shears tool
US5867909A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1997 |
| Grant date | Feb 9, 1999 |
| Priority date | — |
| Expiry date | Apr 23, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB26B15/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Branch shears (1) having two blades (11, 12) that are movable in relation to each other, of which one blade (11) is rigidly connected with a housing (2) and the other blade (12) can be moved by an electric motor (5) via a threaded spindle (8), a threaded nut (21) arranged on the threaded spindle and a rod assembly connected to the threaded nut. A control switch (41) having two reversing switches (42, 43) connected to the circuit of the electric motor (5) is provided. In addition, a control link (51) is attached to the spindle nut (21), onto which the operating cams (53, 54, 55) interacting with the reversing switches (42, 43) are formed. With the aid of the control switch (41), it is possible to stop, continue or reverse the movements of the pivotable blade (12) at any time in a simple manner, thus the movements of this blade can be controlled as desired. In addition, it is ensured that the branch shears (1) will always open automatically by the force of the electric motor (5) if the control switch is released.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.