Patent US4675110A successfully refreshed from Google Patents.
US4675110A
Expired / Lapsed
US
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Filter device and apparatus with multiple gas return passages
Assignee: Biomedical Polymers Inc
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Filing: 1986-01-31
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Granted: 1987-06-23
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Expires: 2006-01-31
Abstract
Abstract A filter device and apparatus for filtering liquid from a collection vessel into a receptacle vessel, including a conduit, a filter in the conduit, and a rim spaced from the filter and forming an interference fit with the interior surface of the collection vessel. The rim has a plurality of openings spaced about its periphery. The device and apparatus further include means for removably securing the conduit to the receptacle vessel and a plurality of gas return passages, arranged about the exterior of the conduit, which connect the receptacle vessel to the openings in the rim.
Inventors
- 👤 John E. Fay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:45
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/01; A; A61; A61B; A61B10/00; A61B10/0038; B01D36/00; B01D36/001; A61B10/0096
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
113 words
A device comprising: means for filtering liquid from a collection vessel into a otherwise closed receptacle vessel, including, a conduit; a filter in said conduit; a rim spaced from said filter and forming an interference fit with the interior surfaces of the collection vessel, said rim having a plurality of openings spaced about its periphery; means for removably, securing said conduit to the receptacle vessel; and a plurality of gas return passages, arranged about the exterior of said conduit, which connect the receptacle vessel to the openings in said rim to equalize pressure between the receptacle vessel and its exterior during filtration and enhance transfer of liquid while minimizing clogging of said openings.
Claim 2
Independent Claim
113 words
A device comprising: means for filtering liquid from a collection vessel into a otherwise closed receptacle vessel, including, a conduit; a filter in said conduit; a rim spaced from said filter and forming an interference fit with the interior surfaces of the collection vessel, said rim having a plurality of openings spaced about its periphery; means for removably, securing said conduit to the receptacle vessel; and a plurality of gas return passages, arranged about the exterior of said conduit, which connect the receptacle vessel to the openings in said rim to equalize pressure between the receptacle vessel and its exterior during filtration and enhance transfer of liquid while minimizing clogging of said openings.
Claim 3
Dependent Claim
35 words
The filter device of claim 1 in which said passages include a plurality of channels in the exterior surfaces of said conduit proximate a region of engagement between said conduit and said means for securing.
Claim 4
Dependent Claim
20 words
The filter device of claim 1 in which said passages include a plurality of vents in said means for securing.
Claim 5
Dependent Claim
33 words
The filter device of claim 3 in which said vents include a plurality of recesses in said means for securing proximate a region of engagement between said means for securing and said conduit.
Claim 6
Dependent Claim
24 words
The filter device of claim 1 in which said passages include a plurality of apertures established between said means for securing and said conduit.
Claim 7
Dependent Claim
18 words
The filter device of claim 1 in which said conduit is tapered from said rim toward said filter.
Claim 8
Dependent Claim
20 words
The filter device of claim 6 in which said conduit is a conical section between said rim and said filter.
Claim 9
Dependent Claim
20 words
The filter device of claim 1 in which said means for securing includes means for threadably engaging the receptacle vessel.
Claim 10
Dependent Claim
29 words
The filter device of claim 1 further including means for guiding the open end of the collection vessel proximate the juncture of said conduit and said means for securing.
Claim 11
Dependent Claim
29 words
The filter device of claim 9 in which said means for guiding includes collar means for forming an interference fit with at least the opening of the collection vessel.
Claim 12
Dependent Claim
19 words
The filter device of claim 10 in which said collar means is integrally connected to said means for securing.
Claim 13
Dependent Claim
30 words
The filter device of claim 9 in which said means for guiding includes a plurality of external ribs disposed on said conduit and oriented from said rim toward said filter.
Claim 14
Dependent Claim
13 words
The filter device of claim 12 in which said ribs are axially oriented.
Claim 15
Dependent Claim
22 words
The filter device of claim 1 in which said conduit includes means for forming a snap fit with said means for securing.
Claim 16
Dependent Claim
26 words
The filter device of claim 14 in which said means for forming a snap fit includes a projection which is received by said means for securing.
Claim 17
Dependent Claim
14 words
The filter device of claim 15 in which said projection is an annular ridge.
Claim 18
Dependent Claim
30 words
The filter device of claim 15 in which said conduit further includes stop means, spaced above said projection, for limiting axial engagement of said conduit with said means for securing.
Claim 19
Dependent Claim
17 words
The filter device of claim 1 in which said filter is a screen of predetermined mesh size.
Claim 20
Dependent Claim
25 words
The filter device of claim 18 in which each opening in said rim is no greater in size than the mesh size of said screen.
Claim 21
Independent Claim
136 words
A device comprising: means for filtering liquid during closed system transfer of the liquid from a collection vessel into a receptacle vessel, including, a conduit; a filter in said conduit; a rim spaced from said filter and forming an interference fit with the interior surfaces of the collection vessel, said rim having a plurality of openings spaced about its periphery; means for removably securing said conduit to the receptacle vessel; means for guiding the open end of the collection vessel proximate the juncture of said conduit and said means for securing; and a plurality of gas return passages, arranged about the exterior of said conduit, which connect the receptacle vessel to the openings in said rim to equalize pressure between the vessels during filtration and enhance transfer of the liquid while minimizing clogging of said openings.
Claim 22
Independent Claim
136 words
A device comprising: means for filtering liquid during closed system transfer of the liquid from a collection vessel into a receptacle vessel, including, a conduit; a filter in said conduit; a rim spaced from said filter and forming an interference fit with the interior surfaces of the collection vessel, said rim having a plurality of openings spaced about its periphery; means for removably securing said conduit to the receptacle vessel; means for guiding the open end of the collection vessel proximate the juncture of said conduit and said means for securing; and a plurality of gas return passages, arranged about the exterior of said conduit, which connect the receptacle vessel to the openings in said rim to equalize pressure between the vessels during filtration and enhance transfer of the liquid while minimizing clogging of said openings.
Claim 23
Dependent Claim
14 words
The apparatus of claim 1 in which said receptacle vessel is a centrifuge tube.
Claim 24
Independent Claim
143 words
An apparatus for filtering liquid during closed system transfer of the liquid, comprising: a collection vessel having an open end; a receptacle vessel for receiving liquid from said collection vessel; a conduit; a filter in said conduit; a rim associated with said conduit, spaced from said filter, and forming an interference fit with the interior surfaces of said collection vessel, said rim having a plurality of openings spaced about its periphery; means for removably securing said conduit to said receptacle vessel; a plurality of gas return passages, arranged about the exterior of said conduit, which connect said receptacle vessel to the openings in said rim; and said collection vessel and said receptacle vessel establishing a closed system between them, and said gas return passages equalizing pressure between said vessels during filtration and enhancing transfer of the liquid while minimizing clogging of said openings.
Claim 25
Independent Claim
143 words
An apparatus for filtering liquid during closed system transfer of the liquid, comprising: a collection vessel having an open end; a receptacle vessel for receiving liquid from said collection vessel; a conduit; a filter in said conduit; a rim associated with said conduit, spaced from said filter, and forming an interference fit with the interior surfaces of said collection vessel, said rim having a plurality of openings spaced about its periphery; means for removably securing said conduit to said receptacle vessel; a plurality of gas return passages, arranged about the exterior of said conduit, which connect said receptacle vessel to the openings in said rim; and said collection vessel and said receptacle vessel establishing a closed system between them, and said gas return passages equalizing pressure between said vessels during filtration and enhancing transfer of the liquid while minimizing clogging of said openings.
References Cited (Backward Citations)
US4485015A
Cited
US4525276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |