Shredding apparatus including overload protection of drive line
US4609155A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 1985 |
| Grant date | Sep 2, 1986 |
| Priority date | — |
| Expiry date | Apr 9, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C2018/164
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Apparatus and method for its use for protecting an electric motor and the mechanical drive line of a material comminuting machine of the type having intermeshing overlapping cutters on rotary shafts, against damage caused by overloading. A torque-limiting coupling located in the drive line between the motor and the cutter shafts is provided with rotation sensors on both the input and output sides of the torque-limiting coupling. A motor controller is responsive to significant differences in the amounts of rotation of the input and output sides of the torque-limiting coupling to stop the motor in case of excessive slippage, in order to protect the motor and the torque-limiting coupling. Where a current-sensing overload device is provided in the case of use of the device with an electric motor, the motor controller can be programmed to respond with sensitivity different from that of the electrical overload protection device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.