US3814079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid collecting and filtering device
Assignee: Pharmacia and Upjohn Co
•
Filing: 1972-04-28
•
Granted: 1974-06-04
•
Expires: 1992-04-28
Abstract
Abstract A pair of telescopically arranged tubes defining an expansible, closed chamber in which the pressure is initially and substantially below ambient pressure. The inner tube has an inlet end with a perforable closure member thereon and an outlet end which communicates with the outer tube. A cannula is supported upon said inlet end for movement between a position spaced from said closure member and a position penetrating through said closure member to communicate with said chamber. Filter means is disposed in said inner tube so that liquid moving from the inlet end through the outlet end of said inner tube must pass through the filter.
Inventors
- 👤 Roy R Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:43
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/15; A61B5/150007; A61B5/150015; A61B5/15003; A61B5/150206; A61B5/150236; A61B5/150251; A61B5/150267; A61B5/150351; A61B5/150374; A61B5/150381; A61B5/150389; A61B5/150473; A61B5/150496; A61B5/150534; A61B5/15058; A61B5/150587; A61B5/150694; A61B5/150717; A61B5/150732; A61B5/150755; A61B5/153; A61B5/154
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
242 words
In a device for collecting a sample of blood removed from a patient by cannula means and thereafter separating the serum from the clot of cellular material, the combination comprising: an elongated and rigid cylindrical inner tube having openings at both ends thereof and defining an elongated passageway therethrough; resiliently flexible closure means supported upon one end of said inner tube for sealingly closing said one end of said inner tube, said closure means having a perforable axial end wall; ringlike annular seal means on said inner tube near the other end thereof; an elongated and rigid cylindrical outer tube having a closed end and an open end, said inner tube having a length substantially greater than the length of said outer tUbe; an elongated part of said outer tube near said open end being freely slidably telescoped on a portion of said inner tube, the annular seal means on said inner tube being slidably and sealingly engaged with the interior wall of said outer tube for permitting free slidable telescopic movement of said inner and outer tubes relative to one another, said inner tube, said outer tube, said closure means and said annular seal means defining an air-tight chamber, the pressure within said chamber being materially below ambient pressure prior to collection of said sample; and filter means positioned within said inner tube and extending across said passageway and through which said serum can pass, but which blocks said blood clot.
Claim 2
Dependent Claim
242 words
In a device for collecting a sample of blood removed from a patient by cannula means and thereafter separating the serum from the clot of cellular material, the combination comprising: an elongated and rigid cylindrical inner tube having openings at both ends thereof and defining an elongated passageway therethrough; resiliently flexible closure means supported upon one end of said inner tube for sealingly closing said one end of said inner tube, said closure means having a perforable axial end wall; ringlike annular seal means on said inner tube near the other end thereof; an elongated and rigid cylindrical outer tube having a closed end and an open end, said inner tube having a length substantially greater than the length of said outer tUbe; an elongated part of said outer tube near said open end being freely slidably telescoped on a portion of said inner tube, the annular seal means on said inner tube being slidably and sealingly engaged with the interior wall of said outer tube for permitting free slidable telescopic movement of said inner and outer tubes relative to one another, said inner tube, said outer tube, said closure means and said annular seal means defining an air-tight chamber, the pressure within said chamber being materially below ambient pressure prior to collection of said sample; and filter means positioned within said inner tube and extending across said passageway and through which said serum can pass, but which blocks said blood clot.
Claim 3
Dependent Claim
54 words
A device according to claim 1, wherein the perforable end wall of said closure means is constructed from an elastomeric self-sealing material so as to permit same to be penetrated by a cannula, said material being self-sealing for closing the opening created by said cannula after withdrawal of said cannula from said closure means.
Claim 4
Dependent Claim
114 words
A device according to claim 1, further including elongated sleeve means snugly and slidably mounted upon said inner tube adjacent said one end thereof, said sleeve means projecting outwardly beyond said one end of said inner tube and having a reduced diameter hub portion, double-pointed cannula means fixedly mounted on the hub portion of said sleeve means, one end of said cannula means being positioned to penetrate axially and completely through the perforable end wall of said closure means upon slidable movement of said sleeve means relative to said inner tube in a direction toward said outer tube, and the axial end wall of said closure means being constructed of a self-sealing elastomeric material.
Claim 5
Dependent Claim
60 words
A device according to claim 1, wherein said filter means comprises an elongated flexible bag closed at one end and open at the other end thereof and having a plurality of small perforations therethrough, said bag extending over a major portion of the length of said passageway, the open end of said bag being sealingly engaged with said closure means.
Claim 6
Dependent Claim
130 words
A device according to claim 1, wherein said annular seal means comprises an annular plug of elastomeric material fixedly secured to said inner tube adjacent said other end thereof, said plug having an axial passage extending completely therethrough and including an annular shank portion projecting into and fixedly and sealingly connected to said inner tube, said plug also having an annular flange portion disposed exteriorly of said other end of said inner tube and positioned in sealing and sliding engagement with the interior wall of said outer tube, and said filter means comprising an axially elongated substantially cylindrical filter member constructed from a porous material, said filter member being disposed within the passageway formed by said inner tube and positioned in abutting engagement with the shank portion of said plug.
Claim 7
Independent Claim
174 words
A device for collecting a sample containing a liquid and thereafter filtering said liquid from said sample, comprising: first elongated tubular means having open ends and defining a passageway therethrough; perforable closure means tightly closing and sealing one end of said first tubular means; second elongated tubular means having a closed end and an open end, said second tubular means being sealingly and slidably telescoped upon said first tubular means so as to cover the other end thereof; elongated sleeve means snugly and slidably mounted upon said one end of said first tubular means for movement lengthwise thereof; cannula means pointed at both ends and coaxially supported by said sleeve means exteriorly of and adjacent said one end of said first tubular means, one end of said cannula means being positioned to penetrate axially and completely through said closure means for communication with said passageway as said sleeve means is moved lengthwise along said first tubular means toward said Second tubular means; filter means in said first tubular means extending completely across said passageway.
Claim 8
Independent Claim
174 words
A device for collecting a sample containing a liquid and thereafter filtering said liquid from said sample, comprising: first elongated tubular means having open ends and defining a passageway therethrough; perforable closure means tightly closing and sealing one end of said first tubular means; second elongated tubular means having a closed end and an open end, said second tubular means being sealingly and slidably telescoped upon said first tubular means so as to cover the other end thereof; elongated sleeve means snugly and slidably mounted upon said one end of said first tubular means for movement lengthwise thereof; cannula means pointed at both ends and coaxially supported by said sleeve means exteriorly of and adjacent said one end of said first tubular means, one end of said cannula means being positioned to penetrate axially and completely through said closure means for communication with said passageway as said sleeve means is moved lengthwise along said first tubular means toward said Second tubular means; filter means in said first tubular means extending completely across said passageway.
Claim 9
Dependent Claim
125 words
A device according to claim 6, wherein said first tubular means has a length substantially greater than the length of said second tubular means, said first tubular means being normally substantially fully telescoped within said second tubular means so that said other end of said first tubular means is disposed closely adjacent the closed end of said second tubular means, the one end of said first tubular means being spaced outwardly a substantial distance from the open end of said second tubular means when in said fully telescoped position, whereby said sleeve means can be slidably moved relative to said first tubular means in a direction toward the open end of said second tubular means for causing said cannula means to penetrate said closure means.
Claim 10
Dependent Claim
69 words
A device according to claim 6, wherein said filter means is an elongated flexible bag closed at one end and open at the other end thereof and having a plurality of small perforations therethrough, the open end of said bag being sealingly engaged with said closure means near said first tubular means so that the adjacent end of said cannula means can communicate with the interior of said bag.
References Cited (Backward Citations)
US3162195A
Cited
US3481477A
Cited
US3366103A
Cited
US3326206A
Cited
US3503386A
Cited
US3539300A
Cited
US3512940A
Cited
US3586064A
Cited
US3660037A
Cited
US3706305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |