Apparatus for sensing empty hoppers
US4445628A · kind A · utility
10Cited by
16References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 24, 1981 |
| Grant date | May 1, 1984 |
| Priority date | — |
| Expiry date | Dec 24, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27D2099/008
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A gravity operated conical hopper having a sliding closure plate which is pneumatically activated as soon as the hopper has been emptied. An apparatus and method is also disclosed for pneumatically detecting and automatically closing the hopper to stop the flow of contained material after material has been discharged to a particular level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.