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:
Jun. 26, 2001
Filed:
Jul. 29, 1998
Carl Bergman, Västerås, SE;
Abstract
A method of treating parts (,) in a treatment chamber (,) by hot-isostatic pressing with an inert gas as pressure medium and in the presence of a purifying agent (,) for the inert gas comprises the steps of reducing the pressure in the treatment chamber (,), increasing the pressure again by introducing the inert gas, increasing the temperature in the treatment chamber (,) by activating heating elements (,), and, after a certain holding time, reducing the pressure and the temperature again. Especially if the purifying agent (,) is of the same material as the parts (,) being treated, the purifying effect of the purifying agent becomes insufficient. The effect of the purifying agent (,) is improved according to the invention by bringing the inert gas, at least when being introduced, to circulate such that it is heated, passes through the purifying agent and is thereafter cooled before contacting the parts. The invention also relates to a device for carrying out the method.