	US 11,950,749 B2
	Vacuum cleaner filter cartridge
Ian Lawrence, Somerset (GB); Marcus Aston, Somerset (GB); James Forrest, Somerset (GB); and Ian Bevis, Somerset (GB)
Assigned to Numatic International Limited, (GB)
Appl. No. 17/435,341
Filed by Numatic International LTD, Camberley (GB)
PCT Filed Mar. 3, 2020, PCT No. PCT/GB2020/050504 § 371(c)(1), (2) Date Aug. 31, 2021, PCT Pub. No. WO2020/178573, PCT Pub. Date Sep. 10, 2020.
Claims priority of application No. 1902895 (GB), filed on Mar. 4, 2019.
Prior Publication US 2022/0133107 A1, May 5, 2022
Int. Cl. B01D 53/22 (2006.01); A47L 9/12 (2006.01); A47L 9/14 (2006.01); B01D 46/02 (2006.01); B01D 46/42 (2006.01); B01D 46/54 (2006.01); F16K 15/14 (2006.01)

CPC A47L 9/127 (2013.01) [A47L 9/1436 (2013.01); B01D 46/02 (2013.01); B01D 46/4272 (2013.01); B01D 46/543 (2013.01); F16K 15/145 (2013.01); B01D 2265/04 (2013.01); B01D 2265/06 (2013.01); B01D 2271/02 (2013.01); B01D 2275/203 (2013.01); B01D 2279/55 (2013.01)]

11 Claims

1. A filter cartridge for a vacuum cleaner comprising first and second opposite end walls, a side wall or walls which extend between the end walls so as to define an enclosure which surrounds a filter interior, wherein one or more of the walls comprises filter membrane material, the cartridge having an opening provided through a first end wall for receiving air entrained detritus into the interior, the opening being defined by a rigid support structure which spans and supports the first end wall of the cartridge, wherein structural reinforcement of one or more of the side wall or walls, and/or second end wall, is provided so that the enclosure is self-supporting but collapsible, so that the cartridge may adopt an erect use configuration, and in a collapsed configuration the side wall or walls and second end are drawn together onto the rigid support structure of the first end so as to be flat-packed.