Withdrawal of particulate material from a hopper
US4221510A · kind A · utility
15Cited by
6References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 9, 1979 |
| Grant date | Sep 9, 1980 |
| Priority date | — |
| Expiry date | Feb 9, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G53/24
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Pneumatically-conveyable particulate material is withdrawn from a hopper using vacuum wands extending into the interior of the hopper. The wands are operated in a cyclic sequence, with material being withdrawn from each wand in turn. This permits material to be withdrawn substantially continuously where the material tends to compact together in flow-preventing bridges and the invention can be put into practice employing a relatively simply applied attachment connected on the exterior of the hopper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.