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. 01, 2021
Filed:
Mar. 07, 2018
Polytec Plastics Germany Gmbh & Co. KG, Lohne, DE;
Christian Berding, Lohne, DE;
Christoph Leson, Dinklage, DE;
Polytec Plastics Germany GMBH & CO. KG, Lohne, DE;
Abstract
The invention relates to a single-stage or multistage suction jet pump comprising a propelling nozzle (), one or more suction nozzles (), a diffuser (), and a volume flow limiting valve in or directly in front of the propelling nozzle. The volume flow limiting valve has a valve element () in the overpressure region () of the suction jet pump, said valve element having an opening () with a cross-sectional area which is smaller than the cross-sectional area of the propelling nozzle (). The valve element spans at least one additional gap opening () which first releases the cross-section of the gap opening () when the pressure difference between the overpressure region () and the suction region () increases and which switches in the event of a defined large pressure drop and the valve element () reduces or closes the cross-section of the gap opening () such that the volume flow flowing over the opening () is limited to a defined level even in the event of a further increasing pressure difference.