Filtration apparatus

Details Filtration apparatus Filtration apparatus

1998-11-30

2000-04-04

Coggins, Wynn Wood

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

22218906, A61M 500, B67D 558

Patent

active

060455403

ABSTRACT:
Filtration apparatus suitable for use as a bladder evacuator includes a hinged, perforate flap 4 that is resiliently biased to extend across an opening 8 through the neck 7 of a squeezable bottle 1 for filtering out solids from liquid discharged when the bottle 1 is squeezed. Return of the liquid when the bottle 1 is released deflects the perforate flap 4 away from the opening 8 against the bias to allow solids to enter the bottle 1 with the returning liquid. A hinged imperforate flap 5 overlies the perforate flap 4 to be deflected with it by the returning liquid, but separates from it across the opening 8 when the bottle 1 is squeezed. The two flaps 4,5 are part of a folded sheet that is clamped onto a rim 6 of the bottle-neck 7 under a shoulder 12 of the bottle-cap 2; the shoulder 12 holds the perforate flap 4 against deflection away from the opening 8 when the bottle 1 is squeezed. As an alternative to a bottle, a squeeze-bulb 20 coupled to a cylinder 21 may be used with a single, perforate flap 24.

REFERENCES:
patent: 1963080 (1934-06-01), Featherstone
patent: 3938513 (1976-02-01), Hargest
patent: 4389314 (1983-06-01), Petretti
patent: 5174892 (1992-12-01), Davis
patent: 5836484 (1998-11-01), Gerber
patent: 5858007 (1999-01-01), Fagan et al.

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