US4578664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio interference suppression choke with a low leakage field
Assignee: Siemens AG
•
Filing: 1985-07-29
•
Granted: 1986-03-25
•
Expires: 2005-07-29
Abstract
Abstract A radio interference suppression choke with a low leakage field, includes a ring core formed of magnetically soft material, a plurality of windings each formed of a respective continuous wire wound on the core in separate respective series-connected winding sections, the windings having mutually adjacent transition regions, and an insulating cap disposed on the core separating the windings at least at the mutually adjacent transition regions thereof.
Inventors
- 👤 Hans Kinzler
- 👤 Jurgen Kaiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:16
CPC Classifications
H; H01; H01F; H01F17/00; H01F17/04; H01F17/06; H01F17/062; H01F27/00; H01F27/02; H01F27/027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
Radio interference suppression choke with a low leakage field, comprising; an electrically insulated ferrite ring core; a first winding having first and second series-connected winding sections wound directly on said core diametrically opposite each other; an annular one-piece insulating cup disposed on said core and on said first winding; and a second winding having first and second series-connected winding sections wound on said cup diametrically opposite each other; said first and second windings being offset relative to each other by substantially 90°, forming a double choke and said cup having segments of enlarged cross section and width disposed on and spanning said winding sections of said first winding and segments of reduced cross section supporting said winding sections of said second winding.
Claim 2
Dependent Claim
122 words
Radio interference suppression choke with a low leakage field, comprising; an electrically insulated ferrite ring core; a first winding having first and second series-connected winding sections wound directly on said core diametrically opposite each other; an annular one-piece insulating cup disposed on said core and on said first winding; and a second winding having first and second series-connected winding sections wound on said cup diametrically opposite each other; said first and second windings being offset relative to each other by substantially 90°, forming a double choke and said cup having segments of enlarged cross section and width disposed on and spanning said winding sections of said first winding and segments of reduced cross section supporting said winding sections of said second winding.
References Cited (Backward Citations)
CA642616A
Cited
US1897604A
Cited
US2216863A
Cited
US3068381A
Cited
US3032729A
Cited
US3027526A
Cited
FR1350868A
Cited
GB1105294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-24 | 1989-09-23 | 1990-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-24 | 1993-09-23 | 1994-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-24 | 1997-09-23 | 1998-03-25 | $7700.00 | Window Closed / Lapsed |