US3908702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing fluid components
Assignee: Individual
•
Filing: 1973-05-04
•
Granted: 1975-09-30
•
Expires: 1993-05-04
Abstract
Abstract Portions of fluid components are mixed during transport through a tube by continuously disturbing their flow pattern in a controlled manner during their passage through the tube. The disturbance is created by providing the tube with a radially inward profile which in a preferred form is an internal screwthread of a thickness 0.25 to 0.75 times the internal diameter of the tube and having a pitch 0.75 to 1.5 times the internal diameter of the tube.
Inventors
- 👤 Jan Arie Klosse
- 👤 Klaas Klosse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:37
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/08; B; B01; B01F; B01F25/00; B01F25/40; B01F25/42; B01F25/43; B01F25/433; B01F23/00; B01F23/40; B01F23/47; Y; Y10; Y10T; Y10T436/00; Y10T436/11; Y10T436/117497; Y10T436/16; Y10T436/166666
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
60 words
A mixing tube for use in transversely mixing fluid components together, said tube having an inner wall surface provided with a rounded male screw-thread configuration that provides a helical bore therethrough and having a height of about 0.5 times the diameter of the tube, and a pitch of from about 0.9 to about 1.1 times the diameter of the tube.
Claim 2
Dependent Claim
60 words
A mixing tube for use in transversely mixing fluid components together, said tube having an inner wall surface provided with a rounded male screw-thread configuration that provides a helical bore therethrough and having a height of about 0.5 times the diameter of the tube, and a pitch of from about 0.9 to about 1.1 times the diameter of the tube.
Claim 3
Dependent Claim
22 words
A mixing tube as recited in claim 1 wherein angles formed by a profile of said male screw-thread configuration are uniformly rounded.
Claim 4
Dependent Claim
27 words
A mixing tube as claimed in claim 1, wherein said tube is made at least in part of synthetic plastics material inert to materials to be processed.
Claim 5
Dependent Claim
19 words
A mixing tube as claimed in claim 1, wherein said tube is made at least in part of polytetrafluoroethylene.
References Cited (Backward Citations)
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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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |