Liquid purification or separation – Filter – Vacuumized filtrate receiver
Patent
1987-08-10
1988-12-20
Hart, Charles
Liquid purification or separation
Filter
Vacuumized filtrate receiver
2104161, 210475, 210479, 2104331, B01D 2900
Patent
active
047923989
ABSTRACT:
A manual liquid filtration device includes a housing having an open lower end providing access to an internal vacuum chamber, and defining a liquid specimen receiving chamber at its upper end adapted for flow communication with the vacuum chamber. An elastic diaphragm extends across the lower open end of the housing and upwardly along its outer peripheral surface so as to cooperate with air orifices in the housing to define valve means enabling unidirectional air flow from the vacuum chamber. A porous membrane filter element is interposed between the specimen receiving chamber and the vacuum chamber and when dry enables air to pass therethrough from the vacuum chamber upon flexing of the diaphragm into the vacuum chamber. When wetted by water, the filter element maintains vacuum in the vacuum chamber but enables liquid from a liquid specimen to be drawn through the filter element so as to retain solid particulate on the filter element for diagnosis or further reagent washing.
REFERENCES:
patent: 2842267 (1958-07-01), Shire et al.
patent: 2879207 (1959-03-01), Poitras
patent: 2896787 (1959-07-01), Roman
patent: 3501012 (1970-03-01), Ryan
patent: 4301010 (1981-11-01), Eddleman et al.
Beiser Robert S.
Hart Charles
Marion Laboratories, Inc.
LandOfFree
Manual vacuum filtration device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Manual vacuum filtration device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Manual vacuum filtration device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1908448