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:
Sep. 08, 2020
Filed:
Dec. 18, 2013
Xerex Ab, Taby, SE;
Peter Tell, Akersberga, SE;
PIAB AKTIEBOLAG, Taby, SE;
Abstract
A multi-stage ejector for generating a vacuum from a source of compressed air or fluid by passing the compressed air or fluid through a series of nozzles, accelerating and entraining the compressed air or fluid so as to form a jet flow in one or more stages and generate a vacuum across each stage. The multi-stage ejector may include a first drive stage; a second stage; and a converging-diverging nozzle provided in the series of nozzles between the first drive stage and the second stage. The multi-stage ejector, in use, may receive jet flow from the first drive stage, accelerate the jet flow to form a second stage air jet and direct the second stage air jet into an inlet of an outlet nozzle of the second stage. The converging-diverging nozzle may be formed in a molded nozzle piece mounted in the multi-stage ejector.