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:
Oct. 02, 2001
Filed:
Mar. 25, 1999
Per Gillbrand, Mariefred, SE;
Richard Öhman, Huddinge, SE;
Interproperty N.V., St-Genesius-Rode, BE;
Abstract
A blank (,′) of high-ductility material is formed with closely spaced thin fins (,) using a forming tool (,) which is rotatable about a tool axis (L) and comprises a set of flat circular space-apart forming discs (,) centered on the tool axis (L) and disposed side by side at fixed intervals along the tool axis (L) and in planes perpendicular thereto. The forming tool is displaced relative to the blank (,′) at right angles to the tool axis (L) to cause the peripheral portions of the forming discs (,) during the cyclical movements of the forming tool (,) progressively to penetrate into the blank (,′) and cause blank material to flow into the gaps separating the forming discs (,) and form planar fins (,).