Filtration unit having means for preventing reuse of filter

Details Filtration unit having means for preventing reuse of filter Filtration unit having means for preventing reuse of filter

1992-01-27

1993-10-19

Drodge, Joseph W.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Position or extent of motion

210232, 210282, 210455, 210473, B01D 2710

Patent

active

052542424

ABSTRACT:
A water cleaning device (1) is provided which has a housing (10) arranged to be supported by a surface, for example stood upon a work surface (50). The housing (10) defines a receptacle (2) for water (100) to be cleaned. A water filtration unit (20) is mounted to the housing (10) and has an outlet (21) for filtered water (101). An electrically operated pump (30) and control means (16,17,25,26,27,28,40) for controlling the pump (30) are provided within the housing (1) for pumping water through the filtration unit (20) to provide cleaned filtered water (101) at the outlet (21). The filtration unit (20) carries a collar (29) which, when the filtration unit (20) is removed from its mounting support (12), is fixed in position relative to the filtration unit (20) so that the filtration unit (20) cannot be mounted to the mounting support (12) again after the filtration unit (20) has once been removed from the housing. This prevents accidental re-use of an old filtration unit which is clogged or otherwise not fully operational.

REFERENCES:
patent: 3539009 (1970-11-01), Kudlaty
patent: 3700112 (1972-10-01), Maeshiba
patent: 3746171 (1973-07-01), Thomsen
patent: 3950253 (1976-04-01), Stern
patent: 4608166 (1986-08-01), Cain
patent: 4678572 (1987-07-01), Hehl
patent: 4772386 (1988-09-01), Grout et al.
patent: 4857189 (1989-08-01), Thomsen et al.
patent: 5133858 (1992-07-01), Walz et al.

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