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:
Nov. 26, 2013
Filed:
May. 14, 2009
Thomas Krause, Wolfen, DE;
Udo Peper, Halle/Saale, DE;
Steffen Zwarg, Wolfen, DE;
René Sowa, Pouch, DE;
Thomas Krause, Wolfen, DE;
Udo Peper, Halle/Saale, DE;
Steffen Zwarg, Wolfen, DE;
René Sowa, Pouch, DE;
Heraeus Quarzglas GmbH & Co. KG, Hanau, DE;
Abstract
The invention relates to a known method for the production of a cylinder from quartz glass, comprising a step, wherein an SiObody which comprises a porous SiOsoot layer and has a lower end, an upper end, and an outer casing, is sintered to form said quartz glass cylinder in a vitrification furnace, and is being held in a vertical orientation by means of a retaining device, which comprises an upper retaining element connected at the upper end of the SiObody, and a lower retaining element disposed on the lower end. In order to provide a method based thereon, by means of which even heavy bodies made of porous SiOcan be safely retained during vitrification, the invention provides that the retaining device has a dimensionally stable connecting part, which extends inside the vitrification furnace along the outer casing of the SiObody and which connects the upper and the lower retaining elements to each other.