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:
May. 21, 1991
Filed:
Jan. 29, 1990
Rudolf Schieg, Graz, AT;
Johann Tesch, Graz, AT;
Maschinenfabrik Andritz Actiengesellschaft, Graz, AT;
Abstract
The invention relates to processes for the treatment of in particular medium and highly consistent material-gas mixtures to be pumped, preferably gas-containing, in particular air-containing fibrous material suspensions, a separation of the gas being effected prior to the pumping operation. The invention is mainly characterized in that the material-gas mixture, preferably the gas-containing fibrous material suspension, is subjected in a separate container separate from the pump housing for the separate gas separation, in particular air separation, preceding the pumping operation, to a conveniently high-speed rotation of in particular between 1,200 and 3,400 rpm, preferably of about 3,000 rpm, while at least in operation, gas, in particular air, is sucked off or a vacuum is generated approximately in the center of the rotating motion of the material-gas mixture. The invention further relates to plants and devices e.g. suitable for carrying out these processes. Conveniently, separate housings are provided for the degassing device and the pump.