US3882024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Header for stagnation-sensitive liquids
Assignee: Dow Chemical Co
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Filing: 1974-04-19
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Granted: 1975-05-06
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Expires: 1994-04-19
Abstract
Abstract A generally cup-shaped header has a rim grooved to receive an Oring. The inner wall of the groove is not as high as the outer wall and is smoothly contoured at the top and base. When an Oring is compressed into the groove and against a generally flat opposing surface, a seal is effected without leaving zones where liquid can stagnate. The header has particular utility in directing the flow of liquids like blood or high polymer solutions which tend to clot, gel or phase-separate in quiescent zones.
Inventors
- 👤 George W Holmes
- 👤 Charles E Savage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:20
CPC Classifications
B; B01; B01D; B01D65/00; B01D63/00; B01D63/02; B01D2313/00; B01D2313/21
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
172 words
A header having the general shape of a cup, pierced by at least one fluid passageway and having a generally cylindrical rim comprising outer and inner wall members, Wo and Wi, projecting generally parallel to the axis of the rim in a direction such as to increase the volume of fluid containable by the header and having concentric, opposed, generally cylindrical faces of greater and lesser radii, ro and ri, respectively, defining an annular land having a bottom width equal to (ro-ri) and of greater and lesser heigths, ho and hi, respectively, said inner wall member Wi having a tapered cross section and comprising a rounded uppermost portion having a thickness ti measured along a radius through any point in the circle of juncture between the cylindrical and non-cylindrical surfaces of Wi, the ratio of ho to (ro-ri) being from about 0.6 to about 0.8, the ratio of hi to (ro-ri) being from about 0.45 to about 0.65 and the ratio of ti to (ro-ri) being from about 0.2 to about 0.3.
Claim 2
Dependent Claim
172 words
A header having the general shape of a cup, pierced by at least one fluid passageway and having a generally cylindrical rim comprising outer and inner wall members, Wo and Wi, projecting generally parallel to the axis of the rim in a direction such as to increase the volume of fluid containable by the header and having concentric, opposed, generally cylindrical faces of greater and lesser radii, ro and ri, respectively, defining an annular land having a bottom width equal to (ro-ri) and of greater and lesser heigths, ho and hi, respectively, said inner wall member Wi having a tapered cross section and comprising a rounded uppermost portion having a thickness ti measured along a radius through any point in the circle of juncture between the cylindrical and non-cylindrical surfaces of Wi, the ratio of ho to (ro-ri) being from about 0.6 to about 0.8, the ratio of hi to (ro-ri) being from about 0.45 to about 0.65 and the ratio of ti to (ro-ri) being from about 0.2 to about 0.3.
Claim 3
Dependent Claim
15 words
A header as in claim 1 comprising means for connecting said passageway to a conduit.
Claim 4
Dependent Claim
29 words
A header as in claim 2 wherein said connecting means is a nipple extending from the outer surface of the header and integrally molded therewith from a thermoplastic resins.
Claim 5
Dependent Claim
53 words
A header as in claim 3 wherein the inner, generally cylindrical surface of Wo, has a minimum radius ro and is inclined at an angle Alpha to said axis so that said land is wider at the top than at the bottom, Alpha having a magnitude of from about 4.5* to about 5.5*.
Claim 6
Dependent Claim
38 words
A header as in claim 3 having the shape of a shallow, generally flat bottomed cup, wherein the side of said inner wall member distal from said land is joined to said rim by a smooth, concave surface.
Claim 7
Dependent Claim
25 words
A header as in claim 5 in which the back surface of said rim is generally flat and parallel to the bottom of said land.
Claim 8
Dependent Claim
31 words
A header as in claim 1 in which the width of said land is restricted at circumferentially spaced apart pinch points consisting of small bulges in either of said opposed surfaces.
Claim 9
Dependent Claim
28 words
A header as in claim 1 having inserted in said land a resilient O-ring having an uncompressed cross-sectional diameter of from about 0.7 (ro-ri) to about 0.95 (ro-ri).
Claim 10
Dependent Claim
77 words
A header as in claim 8 operatively coupled to a generally cylindrical shell containing a plurality of hollow fibers having end portions potted in a resinous tubesheet and opening upon a generally flat surface thereof, said tubesheet having a cylindrical peripheral surface bonded in sealing engagement with the adjacent end portion of said shell and said resilient O-ring being compressed in said land and urged in sealing engagement with a peripheral annular portion of said flat surface.
Claim 11
Dependent Claim
34 words
A header as in claim 1 in which the ratio of hi to ho is from about 0.75 to about 0.85 and the ratio of ti to (ro-ri) is 0.25 + or - 0.01.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |