EP0051288A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A blood sampling set
Assignee: Radiometer AS
•
Filing: 1981-10-29
•
Granted: —
•
Expires: 2001-10-29
Abstract
Abstract A capillary tube (12) containing a sample is anaerobicly sealed by means of closure caps each comprising an end wall (9) and a skirt portion (13). Each open end of the capillary tube is sealed by inserting the open tube end into the cap skirt portion, and in orderto avoid that a volume of air is forced into the capillary tube, the space defined between the open tube end and the cap end wall is vented to the atmosphere through one or more venting passages (3) defined in the walls of the closure cap or between the inner surface of the cap skirt portion and the adjacent outer peripheral surface of the capillary tube. The open tube end is brought into sealing engagement with sealing means (4) on the cap end wall (9), and frictional engagement established between the inner surface of the cap skirt portion (13) and adjacent outer peripheral surface parts of the capillary tube secures that said sealing engagement is maintained.
Inventors
- 👤 Flemming Aas
- 👤 Borge Jeppesen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 08:51
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5082; B01L3/50825; Y; Y10; Y10S; Y10S220/00; Y10S220/19
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
178 words
A method of anaerobicly sealing an open end of a capillary tube (12), which is filled with a liquid sample, by means of a closure cap (1) comprising an end wall (9) and a skirt portion (13) extending axially therefrom, said open tube end being inserted into said skirt portion and brought into engagement with said cap end wall, and frictional engagement being established between inner surface parts (11) of the cap skirt portion and adjacent outer surface parts of the capillary tube so as to retain said cap end wall in engagement with said open tube end, characterized in that the space, which is gradually reduced and defined between the cap end wall (9) and the open tube end while the latter is being inserted into the cap skirt portion (13), is vented to the atmosphere through one or more venting passages (3) defined in or by the skirt portion and/or the end wall of the cap, and that the open tube end is brought into sealing engagement with sealing means (4) on said end wall (9).
Claim 2
Independent Claim
178 words
A method of anaerobicly sealing an open end of a capillary tube (12), which is filled with a liquid sample, by means of a closure cap (1) comprising an end wall (9) and a skirt portion (13) extending axially therefrom, said open tube end being inserted into said skirt portion and brought into engagement with said cap end wall, and frictional engagement being established between inner surface parts (11) of the cap skirt portion and adjacent outer surface parts of the capillary tube so as to retain said cap end wall in engagement with said open tube end, characterized in that the space, which is gradually reduced and defined between the cap end wall (9) and the open tube end while the latter is being inserted into the cap skirt portion (13), is vented to the atmosphere through one or more venting passages (3) defined in or by the skirt portion and/or the end wall of the cap, and that the open tube end is brought into sealing engagement with sealing means (4) on said end wall (9).
Claim 3
Dependent Claim
49 words
A method according to claim 1, characterized in that the sealing means comprises a tapered sealing member (4) extending axially from the inner surface of the end wall (9), said sealing member being received in the open tube end when the latter is inserted into said skirt portion (13).
Claim 4
Dependent Claim
43 words
A method according to claim 1 or 2, characterized in that said space is vented through one or more venting passages (3) defined between the inner surface of the cap skirt portion (13) and the outer peripheral surface of the capillary tube (12).
Claim 5
Dependent Claim
39 words
A method according to claim 1 or 2, characterized in that said space is vented through one or more venting passages (3) extending transversely through the wall of the skirt portion (13) adjacent to the cap end wall (9).
Claim 6
Dependent Claim
86 words
A method according to claim 3, characterized in that the skirt portion (13) has a cylindrical inner surface with a diameter substantially exceeding the outer diameter of the capillary tube (12), the frictional engagement between the cap skirt portion and the capillary tube being established by inserting the tube end and the closure cap (100) applied thereto through a restricted passage defined in a compression member (101) so as to compress the skirt portion radially into contact with the outer surface of the capillary tube (12).
Claim 7
Dependent Claim
19 words
A method according to claim 5, characterized in that the compression member (101) is made of an elastic material.
Claim 8
Dependent Claim
149 words
A closure cap for anaerobicly sealing an open end of a capillary tube (12) filled with a liquid sample, said cap (1) comprising an end wall (9) and an annular skirt portion (13) extending axially therefrom, the inner surface of the end wall being adapted to engage with the open tube end, and the inner surface of the skirt portion being adapted to frictionally engage with the outer peripheral surface of the capillary tube for maintaining the end wall in engagement with the open tube end, characterized in that one or more venting passages (3) extending from the ambient atmosphere to a position adjacent to the inner surface of the cap end wall (9) is/are defined in or by the end wall and/or skirt portion (13), and that sealing means (4) for sealing engagement. with said open tube end is provided on the inner surface of the end wall.
Claim 9
Dependent Claim
149 words
A closure cap for anaerobicly sealing an open end of a capillary tube (12) filled with a liquid sample, said cap (1) comprising an end wall (9) and an annular skirt portion (13) extending axially therefrom, the inner surface of the end wall being adapted to engage with the open tube end, and the inner surface of the skirt portion being adapted to frictionally engage with the outer peripheral surface of the capillary tube for maintaining the end wall in engagement with the open tube end, characterized in that one or more venting passages (3) extending from the ambient atmosphere to a position adjacent to the inner surface of the cap end wall (9) is/are defined in or by the end wall and/or skirt portion (13), and that sealing means (4) for sealing engagement. with said open tube end is provided on the inner surface of the end wall.
Claim 10
Dependent Claim
43 words
A closure cap according to claim 7, characterized in that the sealing means comprises a tapered stopper member (4) which extends axially from the inner surface of the cap end wall and is adapted to be sealingly received in the open tube end.
Claim 11
Dependent Claim
69 words
A closure cap according to claim 7, characterized in that the cross section of the inner surface of the annular skirt portion (13) is non-circular at least adjacent to said cap end wall (9), so as to define said venting passage or passages (3) between the inner surface of the skirt portion and the outer peripheral surface of the capillary tube (12) when the cap (1) is mounted thereon.
Claim 12
Dependent Claim
24 words
A closure cap according to claim 9, characterized in that the cross section of the inner surface of the skirt portion (13) is polygonal.
Claim 13
Dependent Claim
64 words
A closure cap according to any of the claims 7 - 10, characterized in that the inner surface of the skirt portion (13) defines a blind hole (2) having an open end with a cross sectional area, which exceeds the cross sectional area of the hole adjacent to the cap end wall (9) so as to facilitate insertion of the open tube end therein.
Claim 14
Dependent Claim
30 words
A closure cap according to any of the claims 9 - 11, characterized in that the non-circular cross section is shaped so as to define 3 - 6 venting passages.
Claim 15
Dependent Claim
69 words
A closure cap according to claim 7, characterized in that cross section of the inner surface of the annular skirt portion (13) is circular at least adjacent to said cap end wall (9), that said inner surface is adapted to fit snugly around the outer peripheral surface of the capillary tube (12), and that the venting passage or passages (3) is/are formed within the wall parts of the cap.
Claim 16
Dependent Claim
128 words
A closure cap according to any of the claims 7 - 9, characterized in that the cross section of the inner surface of the skirt portion (13) is circular and has a diameter substantially exceeding the outer diameter of the capillary tube (12), that the closure cap further comprises a skirt compression member (101) having a passage defined therein for receiving said cap (100) when mounted on the capillary tube, and that the cross section of the passage is sized so as to compress said skirt portion (13) radially inwardly into frictional contact with the outer peripheral surface of the capillary tube when the cap skirt portion is inserted into the passage, whereby the end wall (9) may be maintained in sealing engagement with the open tube end.
Claim 17
Dependent Claim
49 words
A closure cap according to claim 14, characterized in that the skirt compression member (101) is connected to the skirt portion (13) and/or end wall (9) by flexible connecting means (103), the passage and the skirt portion extending substantially coaxially on opposite sides of the cap end wall (9).
Claim 18
Dependent Claim
33 words
A method according to claim 14 or 15, characterized in that the passage is defined by an annular bead or ridge (103) formed on an inner annular surface of the compression member (101).
Claim 19
Dependent Claim
21 words
A method according to claim 16, characterized in that the annular ridge or bead (102) is made from an elastic material.
References Cited (Backward Citations)
GB819758A
Cited
GB917300A
Cited
US3085705A
Cited
FR1527058A
Cited
FR1583447A
Cited
DE7106198U
Cited
US4066067A
Cited
US4204606A
Cited
US4070249A
Cited
WO1980001047A1
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.