US 12,280,971 B2
High containment discharge station
Frédéric Dietrich, Jr., Morrens (CH)
Assigned to Fydec Holding SA, Ecublens (CH)
Appl. No. 17/294,494
Filed by Fydec Holding SA, Ecublens (CH)
PCT Filed Nov. 15, 2018, PCT No. PCT/EP2018/081372
§ 371(c)(1), (2) Date May 17, 2021,
PCT Pub. No. WO2020/098940, PCT Pub. Date May 22, 2020.
Prior Publication US 2022/0055850 A1, Feb. 24, 2022
Int. Cl. B08B 15/02 (2006.01); B65B 69/00 (2006.01); B65G 69/18 (2006.01)
CPC B65G 69/181 (2013.01) [B08B 15/02 (2013.01); B65B 69/00 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An unloading device for unloading loose material hazardous to health from rigid or flexible containers, the unloading device comprising:
an unloading chamber comprising a discharge opening discharging the material after removal from a container of the rigid or flexible containers,
an insertion opening for at least partial insertion of the container into the unloading chamber,
wherein the unloading chamber has a ventilation opening which is disposed on a side of the unloading chamber opposite the insertion opening and which is connected to pump means to generate an airflow inside the unloading chamber, the airflow causing a laminar airflow from the insertion opening in a direction of the ventilation opening,
wherein
a partition wall having a variable passage opening is disposed between the insertion opening and the unloading chamber inside the unloading chamber, wherein the variable passage opening is designed and dimensioned in such a manner that the container to be emptied passes through the variable passage opening, and the variable passage opening is also designed in such a manner that no airtight sealing or closure is achieved by the partition wall in any state during the emptying, and wherein
a nozzle arrangement is disposed in an area of the insertion opening, the nozzle arrangement being connected to pump means to generate an airflow in the direction of the ventilation opening, and wherein the ventilation opening is configured for extraction of a volume of flow proportional to a size or surface of the insertion opening.