Air-core coil and process for fabricating the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 8, 2008
Grant Date -
Sep 29, 2005
app pub date -
Dec 9, 2002
filing date -
Jun 11, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention provides an air-core coil 21 wherein one conductor is wound into a spiral form to thereby form consecutively, axially of the coil, a plurality of unit turn portions (25, 26, 27) which are different from each other in inner peripheral length and to form, axially of the coil, unit coil portions comprising the plurality of unit turn portions (25, 26, 27) to produce a partly finished coil 20, and thereafter the partly finished coil 20 is compressed to force the unit turn portion of small inner peripheral length inwardly of the unit turn portion of great inner peripheral length from among the unit turn portions providing each of the unit coil portions to thereby make each of the unit coil portions multi-layered. Thus the air-core coil 21 exhibits a smaller voltage across layers than conventionally and excellent frequency characteristics.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully