Level control system for a rotary cone-type feed hopper
US4071168A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 1976 |
| Grant date | Jan 31, 1978 |
| Priority date | — |
| Expiry date | Apr 22, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/226
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A level control system involving both an apparatus and a method for a rotary feed hopper of the inverted, open-ended, truncated cone-type, wherein heavy paste-like viscous material which is fed into the large open upper end of the feed hopper is delivered or discharged through the small lower end of the hopper. A load meter in connected relation with the motor which drives the hopper senses the power required to drive the hopper and thus indirectly indicates the quantity of the material in the hopper, and consequently, the height or level of the material. When the load on the motor reaches a predetermined maximum the feed of material to the hopper is discontinued thus preventing overflow. When the load on the motor reaches a predetermined minimum the feed of material into the hopper is resumed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.