The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 11, 2000
Filed:
Mar. 04, 1998
David A Smith, Cumnor Hill, GB;
Astec International Limited, , HK;
Abstract
An improved low profile transformer is disclosed. The transformer has desirable characteristics for switch mode power supplies such as minimum high frequency resistance, improved coupling of primary and secondary windings, and reduced eddy current losses. The transformer has a primary winding comprised of an insulated conducting foil that is folded into a staircase-shaped winding. One or more secondary winding segments comprised of U-shaped conducting sheets are interleaved with the primary winding to form a minimally separated primary and secondary winding. The windings are substantially surrounded by an E-shaped magnetic core to facilitate the magnetic coupling of the windings.