US3585540A
Expired / Lapsed
US
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Flexible waveguide having means to reduce deformation of internal cross section
Assignee: Telefunken Patentverwertungs GmbH
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Filing: 1968-07-17
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Granted: 1971-06-15
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Expires: 1988-07-17
Abstract
Abstract A flexible waveguide for the correct transmission of electromagnetic waves, comprising a relatively thin, seamless metal waveguide tube having a noncircular internal cross section, the edges or profile which is free of abrupt changes of direction. Means are provided, according to the invention, for imparting a rigidity to the waveguide tube which will reduce to a minimum any deformation of the internal cross section, when the waveguide is bent or twisted.
Inventors
- 👤 Erich Schuttloffel
- 👤 Heinz Zanzinger
- 👤 Gerhard Schickle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:35
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/12; H01P3/14
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
119 words
A flexible waveguide for the correct transmission of electromagnetic waves comprising: a seamless metal waveguide tube having a relatively thin wall of constant thickness and a noncircular internal cross section, the profile of which is continuous and free of abrupt changes of direction; and means for imparting a rigidity to said waveguide tube at selected locations such that when said waveguide is bent or twisted, the deformation of said internal cross section is reduced to a minimum, said means including a waveguide jacket made of dielectric material surrounding the outer surface of said waveguide tube, said jacket having different thicknesses in profile with the thickness being smallest in the region of the principal cross-sectional axes of said waveguide tube.
Claim 2
Dependent Claim
119 words
A flexible waveguide for the correct transmission of electromagnetic waves comprising: a seamless metal waveguide tube having a relatively thin wall of constant thickness and a noncircular internal cross section, the profile of which is continuous and free of abrupt changes of direction; and means for imparting a rigidity to said waveguide tube at selected locations such that when said waveguide is bent or twisted, the deformation of said internal cross section is reduced to a minimum, said means including a waveguide jacket made of dielectric material surrounding the outer surface of said waveguide tube, said jacket having different thicknesses in profile with the thickness being smallest in the region of the principal cross-sectional axes of said waveguide tube.
Claim 3
Dependent Claim
112 words
A flexible waveguide for the correct transmission of electromagnetic waves having a relatively thin walled seamless metal waveguide tube with a noncircular internal cross section and with the inner and outer cross-sectional profiles of said wall being continuous and free of abrupt changes in direction, said waveguide tube having two principal cross-sectional axes, the wall of said waveguide tube having different thicknesses in profile and being thinner in the region of said two axes than in the other regions thereof so that said wall imparts a rigidity to the waveguide tube such that the deformation of said internal cross section is reduced to a minimum when the waveguide is bent or twisted.
Claim 4
Dependent Claim
112 words
A flexible waveguide for the correct transmission of electromagnetic waves having a relatively thin walled seamless metal waveguide tube with a noncircular internal cross section and with the inner and outer cross-sectional profiles of said wall being continuous and free of abrupt changes in direction, said waveguide tube having two principal cross-sectional axes, the wall of said waveguide tube having different thicknesses in profile and being thinner in the region of said two axes than in the other regions thereof so that said wall imparts a rigidity to the waveguide tube such that the deformation of said internal cross section is reduced to a minimum when the waveguide is bent or twisted.
Claim 5
Dependent Claim
19 words
The waveguide defined in claim 2, wherein said internal cross section is symmetrical with respect to said two axes.
Claim 6
Dependent Claim
16 words
The waveguide defined in claim 2, wherein said two principal cross-sectional axes are of differing length.
Claim 7
Dependent Claim
23 words
The waveguide defined in claim 4, wherein the ratio of the shorter to the longer of said two axes is larger than 0.45.
Claim 8
Dependent Claim
21 words
The waveguide defined in claim 2, wherein said waveguide tube has at least one indentation extending parallel to its longitudinal axis.
Claim 9
Dependent Claim
18 words
The waveguide defined in claim 6, wherein said inner cross-sectional profile of said wall describes a Cassinian curve.
Claim 10
Dependent Claim
32 words
The waveguide defined in claim 2, wherein the thickness of said wall is chosen so that the bendability of said waveguide in the plane of said two principal axes is approximately equal.
Claim 11
Dependent Claim
17 words
The waveguide defined in claim 2, wherein said waveguide tube is formed by a drawn aluminum tube.
Claim 12
Dependent Claim
93 words
A flexible waveguide for the correct transmission of electromagnetic waves having a relatively thin walled drawn aluminum waveguide tube with a noncircular internal cross section, the inner and outer cross-sectional profiles of said wall being continuous and free of abrupt changes in direction, the wall of said waveguide having a varying thickness in profile with a minimum thickness in the region of the two principal cross-sectional axes, and a maxImum wall thickness in the regions therebetween, whereby undesirable deformations of said internal cross section are prevented during bending and/or twisting of said waveguide.
Claim 13
Dependent Claim
93 words
A flexible waveguide for the correct transmission of electromagnetic waves having a relatively thin walled drawn aluminum waveguide tube with a noncircular internal cross section, the inner and outer cross-sectional profiles of said wall being continuous and free of abrupt changes in direction, the wall of said waveguide having a varying thickness in profile with a minimum thickness in the region of the two principal cross-sectional axes, and a maxImum wall thickness in the regions therebetween, whereby undesirable deformations of said internal cross section are prevented during bending and/or twisting of said waveguide.
Claim 14
Dependent Claim
19 words
A flexible waveguide as defined in claim 2 wherein the outer cross-sectional profile of the waveguide wall is nonlinear.
Claim 15
Dependent Claim
28 words
A flexible waveguide as defined in claim 11 wherein the outer cross-sectional profile of the waveguide wall curves inwardly in the regions of said two principal cross-sectional axes.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |