Liquid purification or separation – Flow – fluid pressure or material level – responsive – Check valve
Reexamination Certificate
2000-05-08
2001-12-18
Drodge, Joseph W. (Department: 1723)
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Check valve
C137S606000, C137S545000, C210S339000, C210S435000
Reexamination Certificate
active
06331246
ABSTRACT:
BACKGROUND
1. Field of the Invention
This invention is directed to a filter system, in general, and, more particularly, to a filter system for removing solids or semi-solids from a fluid or liquid carrier.
2. Prior Art
There are many uses for filter systems and/or devices for removing certain types of materials from a carrier. One such application is the removal of solid or semi-solid detritus such as bone chips, flesh, blood clots or the like from the waste material generated by a medical procedure or operation. This removal process permits the liquid or fluid carrier to be treated separately from the other debris which is trapped by the filtration process. Of course, filtration processes are not limited to the medical field, per se, but can be used in areas such as clean rooms or other sterile environments.
SUMMARY OF THE INSTANT INVENTION
The invention relates to a filter system which is especially useful in the treatment of waste material, in particular liquid waste material which may include particulate matter therein. The filter system includes filtration means, for example, a series of filters of increasingly finer porosity in order to selectively eliminate particulate and/or or semi-particulate matter from a fluid or liquid carrier material passing through the filter system. The filters are mounted within a housing which includes one or more inlet ports and at least one outlet port so that multiple input sources can be accommodated, if so desired. The system includes appropriate check valve devices to establish unidirectional flow to prevent reverse flow of effluent therethrough. The filter materials are intended (but are not required) to be disposable. The housing may also be disposable, if preferred.
REFERENCES:
patent: Re. 24255 (1956-12-01), Lund
patent: 110136 (1870-12-01), Hemenway
patent: 493378 (1893-03-01), Gibson
patent: 4141379 (1979-02-01), Manske
patent: 4443336 (1984-04-01), Bennethum
patent: 4915688 (1990-04-01), Bischof
Beckham Scott
Emis Dale
Patel Nilesh
Cecil Terry K.
Drodge Joseph W.
Stryker Corporation
Weber, Jr. G. Donald
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