US 12,012,341 B2
Water purification device
Mikkel Vestergaard Frandsen, Lausanne (CH); Daniel Frauchiger, Prilly (CH); Jean-Luc Madier de Champvermeil, Divonne les Bains (FR); Jean-Marc Pascal, Voreppe (FR); and Luc Stoops, Tilburg (NL)
Assigned to LIFESTRAW SARL, Lausanne (CH)
Filed by Vestergaard SA, Lausanne (CH)
Filed on Jul. 1, 2021, as Appl. No. 17/364,940.
Application 17/364,940 is a continuation of application No. 15/134,760, filed on Apr. 21, 2016, granted, now 11,053,141.
Prior Publication US 2021/0340029 A1, Nov. 4, 2021
Int. Cl. C02F 1/44 (2023.01); B01D 61/18 (2006.01); B01D 63/02 (2006.01); B01D 65/02 (2006.01); C02F 1/00 (2023.01); C02F 1/50 (2023.01); C02F 1/68 (2023.01)
CPC C02F 1/444 (2013.01) [B01D 61/18 (2013.01); B01D 63/02 (2013.01); B01D 65/02 (2013.01); C02F 1/002 (2013.01); B01D 2313/10 (2013.01); B01D 2313/12 (2013.01); B01D 2313/16 (2013.01); B01D 2313/20 (2013.01); B01D 2313/24 (2013.01); B01D 2313/50 (2013.01); B01D 2313/90 (2013.01); B01D 2321/04 (2013.01); C02F 1/006 (2013.01); C02F 1/50 (2013.01); C02F 1/688 (2013.01); C02F 2201/005 (2013.01); C02F 2201/007 (2013.01); C02F 2301/043 (2013.01); C02F 2303/16 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A portable device (1) for water purification, the device (1) comprising a dirt water container (2) for accumulating dirt water and a purification unit (5) for purifying the dirt water, wherein the dirt water container (2) is arranged above the purification unit (5) for driving water through the purification unit (5) by gravity; wherein the purification unit (5) comprises a filter housing (5′) enclosing a purification medium that is separating an upstream side (52) of the purification unit (5) from a downstream side (53) of the purification unit (5) such that water in the purification unit (5) can flow from the upstream side (52) to the downstream side (53) only through the purification medium; the filter housing (5′) having a downstream outlet (29A) from the downstream side (53); wherein the purification unit (5) is a filtration unit (5) and the purification medium is a microporous filtration membrane; wherein the dirt water container (2) has a container outlet (10), and the filter housing (5′) has an upstream inlet (19) to the upstream side, wherein the container outlet (10) and the upstream inlet (19) are fluid-flow-connected by a first flow connector (9) for receiving dirt water from the dirt water container (2) into the upstream side of the purification unit (5); wherein the device comprises a clean water tank (3) fluid-flow connected to the downstream side (53) through the downstream outlet (29A) for receiving purified water from the downstream side (53), wherein a backwash tube (12, 12A) is provided which is connected to the upstream side (52) for receiving contaminated backwash water from the upstream side (52) of the filtration unit (5) and connected to a backwash receptacle (8) for dispensing the backwash water into the backwash receptacle (8) when water is pressed from the downstream side (53) of the filtration unit (5) through the membrane to the upstream side (52) by compression of a backwash bulb (7) and further from the upstream side (52) through the backwash tube (12, 12A) into the backwash receptacle (8); wherein the backwash receptacle (8) is different and separate from the dirt water container (2) and tube-connected only to the filter housing (5′), and wherein the backwash receptacle is configured so that it is detachable from the backwash tube and is emptyable and replaceable.