Patent US4059129A successfully refreshed from Google Patents.
US4059129A
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Cylindrical body provided with means for counteracting vibrations resulting from a transversely flowing fluid
Assignee: Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
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Filing: 1976-02-06
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Granted: 1977-11-22
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Expires: 1996-02-06
Abstract
Abstract Cylindrical body the outer periphery of which is provided with means to counteract vibrations occurring in that body as a result from transverse flow against it, these means comprising a number of small planes mounted according to a certain pattern and placed substantially perpendicular to the outer periphery of the body, which planes form an angle of from 5° to 25° with the cross-section of this cylindrical body; the surfaces of these planes at the most amounting to 2.5% of the surface of the cross-section of the cylindrical body and their lengths at most to 20% of the diameter of this body.
Inventors
- 👤 Nikolaas Feis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:15
CPC Classifications
F; F15; F15D; F15D1/00; F15D1/10; E; E01; E01D; E01D11/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
96 words
A cylindrical body that at the outer periphery is provided with means for counteracting vibrations of said body resulting from a transverse flow against the outside of said body, wherein said means comprise a plurality of small planes which extend on substantially a perpendicular direction from the outer surface of said cylindrical body and which form an angle of 5°-25° with a cross-section of said cylindrical body which is perpendicular to the axis of said body and have a greater length than width which are mounted substantially perpendicular to the outer surface of said cylindrical body.
Claim 2
Dependent Claim
96 words
A cylindrical body that at the outer periphery is provided with means for counteracting vibrations of said body resulting from a transverse flow against the outside of said body, wherein said means comprise a plurality of small planes which extend on substantially a perpendicular direction from the outer surface of said cylindrical body and which form an angle of 5°-25° with a cross-section of said cylindrical body which is perpendicular to the axis of said body and have a greater length than width which are mounted substantially perpendicular to the outer surface of said cylindrical body.
Claim 3
Dependent Claim
45 words
A cylindrical body according to claim 1, wherein the surface of the vertical planes at the most amounts to 2.5% of the surface of the cross-section of the cylindrical body and their length at the most to 20% of the diameter of the cylindrical body.
Claim 4
Dependent Claim
16 words
A cylindrical body according to claim 1, wherein the vertical planes are constructed streamline-shaped in cross-section.
Claim 5
Dependent Claim
41 words
A cylindrical body according to claim 1, wherein the mutual distances between the vertical planes seen in the longitudinal direction of the cylindrical body amount to not less than 0.5 and to not more than twice the diameter of this body.
Claim 6
Dependent Claim
51 words
A cylindrical body according to claim 1, wherein the vertical planes are located according to describing lines, which at the upstream side between 30° and 90° lie to the left and to the right of the plane of symmetry in the direction of flow through the axis of the cylindrical body.
Claim 7
Dependent Claim
33 words
A cylindrical body according to claim 1 wherein the vertical planes are located according to describing lines in the form of a number of helices with pitch angles of from 5° to 15°.
Claim 8
Dependent Claim
46 words
A cylindrical body according to claim 6, wherein the vertical planes on the one describing line or helix have pitch angles that are directed either in the same direction as or in the direction opposite to the vertical planes on the other describing line or helix.
Claim 9
Dependent Claim
27 words
A cylindrical body according to claim 1, wherein the vertical planes on each of the describing lines per plane or per group alternately have opposite pitch angles.
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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) | 1980-11-21 | 1981-05-23 | 1981-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-21 | 1985-05-23 | 1985-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-21 | 1989-05-23 | 1989-11-22 | $7700.00 | Window Closed / Lapsed |