Patent US3687296A successfully refreshed from Google Patents.
US3687296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid separator
Assignee: Ewi Research & Dev Corp
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Filing: 1971-03-26
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Granted: 1972-08-29
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Expires: 1991-03-26
Abstract
Abstract A fluid separator having a tubular member slideably mounted in an entrance opening of an outer container by means of a first stopper. A porous filter is mounted on the inner end of said tubular member while a second stopper is provided on the other end thereof. The outer container is substantially evacuated, said second stopper being adapted to permit the passage of a hollow needle therethrough for the insertion of the fluid to be separated into said tubular member. Said filter means separates the fluid from heavier materials therein upon the withdrawal of said tubular member from said outer container.
Inventors
- 👤 Dom Spinosa
- 👤 John Varga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:48
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5082; B01D; B01D33/00; B01D33/01; G; G01; G01N; G01N33/00; G01N33/48; G01N33/483; G01N33/487; G01N33/49; G01N33/491
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
177 words
A fluid separator, comprising an outer container having at least one entrance opening; a tubular member having openings in both ends dimensioned to pass through said outer container entrance opening and positioned in said opening with an inner end thereof projecting into said outer container; first stopper means mounted in said outer container entrance opening for slideably receiving said tubular member and for sealing the portion of said entrance opening outside of said tubular member; porous filter means mounted across the opening and defining the inner end of said tubular means; and second stopper means sealing the opening defining the other end of said tubular member, said fluid separator being adapted to permit the substantial evacuation of said outer container and tubular member, said second stopper means being adapted to permit the insertion therethrough into said tubular member of the fluid to be separated without substantially affecting said vacuum, whereby the filtrate portion of said fluid passes through said filter medium into said outer container when said tubular member is longitudinally displaced outwardly of said outer container.
Claim 2
Dependent Claim
177 words
A fluid separator, comprising an outer container having at least one entrance opening; a tubular member having openings in both ends dimensioned to pass through said outer container entrance opening and positioned in said opening with an inner end thereof projecting into said outer container; first stopper means mounted in said outer container entrance opening for slideably receiving said tubular member and for sealing the portion of said entrance opening outside of said tubular member; porous filter means mounted across the opening and defining the inner end of said tubular means; and second stopper means sealing the opening defining the other end of said tubular member, said fluid separator being adapted to permit the substantial evacuation of said outer container and tubular member, said second stopper means being adapted to permit the insertion therethrough into said tubular member of the fluid to be separated without substantially affecting said vacuum, whereby the filtrate portion of said fluid passes through said filter medium into said outer container when said tubular member is longitudinally displaced outwardly of said outer container.
Claim 3
Dependent Claim
42 words
A fluid separator as recited in claim 1, wherein said tubular member is formed with a vent hole therethrough on a portion thereof intermediate the normal fluid level and the point of engagement between said first stopper means and said tubular member.
Claim 4
Dependent Claim
95 words
A fluid separator as recited in claim 1, wherein said first stopper means is provided with a central opening through which said tubular member extends, said first stopper means engaging the periphery of said tubular member in sealing relation while permitting the longitudinal displacement thereof, said first stopper member being formed with a flexible arm portion projecting therefrom and a cap portion mounted to the end of said arm portion and dimensioneD for selectively sealingly engaging the central opening of said first stopper means for sealing said outer container after withdrawal of said tubular member.
Claim 5
Dependent Claim
85 words
A fluid separator as recited in claim 1, wherein said second stopper means is provided with a thinned region as viewed axially relative to said tubular member, said second stopper means being dimensioned so that a compressive force is applied to said thinned region by said tubular member when said second stopper means is inserted therein, whereby said thinned region of said second stopper means may be pierced by a hollow needle for insertion of fluid into said tubular body without substantially affecting said vacuum.
Claim 6
Dependent Claim
15 words
A fluid separator as recited in claim 1, wherein said porous filter medium is inert.
Claim 7
Dependent Claim
38 words
a fluid separator as recited in claim 1, including a ring-shaped resilient mounting member for securing said filter medium to said tubular member, said filter member being pressingly engaged to said tubular member by said ring-shaped retaining member.
Claim 8
Dependent Claim
57 words
A fluid separator as recited in claim 1, including a porous support member extending across the opening defining said inner end of said tubular member, said filter medium being supported on the inner surface of said porous support member, whereby the filtrate passing through said filter medium passes through said porous support member into said outer container.
Claim 9
Dependent Claim
19 words
A fluid separator as recited in claim 7, wherein said filter medium and porous support member are both inert.
Claim 10
Dependent Claim
63 words
A fluid separator as recited in claim 1, including adapter means having first and second hollow needles projecting therefrom, at least one of said hollow needles being adapted for insertion through said second stopper means; a fluid passage between said first and second hollow needles; and valve means for selectively opening and closing said fluid passage to control the passage of fluid therethrough.
Claim 11
Dependent Claim
57 words
A fluid separator as recited in claim 9, wherein said second stopper means is provided with a portion projecting longitudinally beyond said tubular member, said adapter means being provided with a mounting portion for cooperatively engaging said projecting portion of said second stopper means for the releasable securing of said adapter means to said second stopper means.
Claim 12
Dependent Claim
81 words
A fluid separator as recited in claim 9, wherein said fluid passage includes a length of flexible tubing, said valve means including a pair of displaceable valve members positioned on opposed sides of said flexible tubing for displacement relative to said tubing in a first open position and a second position at which said flexible tubing is engaged between said valve members to close said fluid passage, and means for selectively displacing said valve means between said first and second position.
Claim 13
Dependent Claim
73 words
A fluid separator as recited in claim 11, wherein said adapter means includes a support portion having apertures therethrough; said valve members being dimensioned to project through said apertures at said first position and being normally biased in said first position, said displacing means including a member displaceable into and out of registration with said apertures and dimensioned to displace said valve members into said second position when in registration with said apertures.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |