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:
Aug. 12, 2014
Filed:
Aug. 28, 2010
Knut Lindner, Kelkheim, DE;
Thoralf Krause, Leipzig, DE;
Arnd Greding, Hofheim, DE;
Rothenberger AG, Kelkheim, DE;
Abstract
A device for expanding a hollow body includes a plurality of sector-shaped expandable jaws disposed in a holder and distributed about a central axis. The expandable jaws extend along the axis to a free end and are radially movable with respect to the axis. Each of the expandable jaws includes: a cylindrical surface having a radius corresponding to a radius of the expanded hollow body and an inward radial taper at an area of the free end; and a plurality of projections and recesses disposed in a joint region and arranged in an alternating manner with each other along the axis and at least partially extending into the area of the free end. The cylindrical surfaces are rounded off to transition to respective outer surfaces of the projections. The outer surfaces of the projections extend, at least at ends of the projections, radially inward with respect the cylindrical surfaces.