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:
Dec. 17, 2013
Filed:
Feb. 26, 2010
Detlef Gneuss, Bad Oeynhausen, DE;
Detlef Gneuss, Bad Oeynhausen, DE;
Gneuss Kunststofftechnik GmbH, Bad Oeynhausen, DE;
Abstract
A liquid ring vacuum pump for degassing molten plastic has an inlet where gases are drawn in and an outlet through which gases are blown out. A closed circulation path for the compression fluid holds a replaceable filter insert for filtering coarse contaminants out of the compression liquid, a precondensation unit upstream of the pump inlet for filtering fine contaminants out of the compression liquid, and only one continuously operating fine or ultrafine filter in the closed circulation path. The closed circulation path is closed even when the fine filter or ultrafine filter is replaced. A controller connected to the continuously operating filter directs replacement of the filter element as a function of degree of contamination, filtering time, pressure conditions, or flow velocity conditions at the filter.