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:
Sep. 27, 2005
Filed:
Jun. 30, 2003
Scott Lee Christopherson, Rochester, MN (US);
Edward Charles Gillard, Mantorville, MN (US);
Don Alan Gilliland, Rochester, MN (US);
Scott Lee Christopherson, Rochester, MN (US);
Edward Charles Gillard, Mantorville, MN (US);
Don Alan Gilliland, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Methods and apparatus are disclosed for a tunable inductor. A coil of electrically conducting material is wrapped around a coilform, preferably generally cylindrical in shape. The coilform is constructed having a threaded portion of screw-like ridges with troughs between the ridges. The coilform may also have an unthreaded portion. The ridges and troughs of the threaded portion may run along substantially all of the coilform or just a portion of the coilform. As the coilform is rotated, the electrical conductor is engaged in the threads, changing the shape of the coil, and thereby also changing the inductance of the coil.