US4710736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible waveguides with 45° corrugations to allow bending and twisting of waveguides
Assignee: Individual
•
Filing: 1984-07-05
•
Granted: 1987-12-01
•
Expires: 2004-07-05
Abstract
Abstract A flexible waveguide (1) has corrugated seamless walls (2) the corrugations of which are inclined to the transverse planes of the waveguide, that is, planes perpendicular to the longitudinal axis of the waveguide, at an angle of substantially 45°. The inclined corrugations, which may be annular or helical, permit both flexing and twisting of the waveguide.
Inventors
- 👤 Alan G. Stidwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:29
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/12; H01P3/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
44 words
A waveguide capable of being bent and twisted through substantial angles, and formed of discontinuity-free metal tubing with continuous corrugations of the wall of the waveguide extending all around the waveguide at an angle of substantially 45° to the longitudinal direction of the waveguide.
Claim 2
Dependent Claim
44 words
A waveguide capable of being bent and twisted through substantial angles, and formed of discontinuity-free metal tubing with continuous corrugations of the wall of the waveguide extending all around the waveguide at an angle of substantially 45° to the longitudinal direction of the waveguide.
Claim 3
Dependent Claim
17 words
A flexible waveguide according to claim 1, characterised in that the corrugations have a rectangular transverse profile.
Claim 4
Dependent Claim
18 words
A flexible waveguide according to claim 1, characterised in that the corrugations have a substantially sinusoidal transverse profile.
Claim 5
Dependent Claim
32 words
A waveguide according to claim 1 having substantially circular cross-section wherein the corrugations are continuous multi-start interwound helical corrugations at an angle of substantially 45° to the longitudinal direction of the waveguide.
Claim 6
Dependent Claim
32 words
A waveguide according to claim 1 having substantially rectangular cross-section wherein the corrugations are continuous multi-start interwound helical corrugations at an angle of substantially 45° to the longitudinal direction of the waveguide.
Claim 7
Dependent Claim
43 words
A waveguide according to claim 1 having substantially rectangular cross-section wherein the corrugations are oblique continuous annular corrugations in which the individual corrugations on each wall of the waveguide are at an angle of substantially 45° to the longitudinal direction of the waveguide.
Claim 8
Dependent Claim
36 words
A waveguide capable of being bent and twisted through substantial angles and consisting of seamless metal tubing with continuous multi-start interwound helical corrugations at an angle of substantially 45° to the longitudinal direction of the waveguide.
Claim 9
Dependent Claim
36 words
A waveguide capable of being bent and twisted through substantial angles and consisting of seamless metal tubing with continuous multi-start interwound helical corrugations at an angle of substantially 45° to the longitudinal direction of the waveguide.
Claim 10
Dependent Claim
17 words
A flexible waveguide according to claim 7, characterised in that the corrugations have a rectangular transverse profile.
Claim 11
Dependent Claim
18 words
A flexible waveguide according to claim 7, characterised in that the corrugations have a substantially sinusoidal transverse profile.
References Cited (Backward Citations)
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FR2528240A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-30 | 1999-06-01 | 1999-12-01 | $7700.00 | Window Closed / Lapsed |