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| Number | Title | Issue Date |
| 7452191 | Vacuum pump and method for generating sub-pressure According to the invention, a vacuum pump is disclosed comprising a screw-rotor pump having a compression section (8) and an expansion section (7), and wherein a discharge (10) from the compression section communicates with at least one ejector ... | 11/18/2008 |
| 6612633 | Double bellows vacuum operated lifting apparatus A vacuum operated lifting apparatus includes a piston having a pressure side and a suction side, respectively, and being movably received in a cylinder, wherein a piston shaft projects through a bottom of the cylinder from the pressure side of the piston ... | 09/02/2003 |
| 6561769 | Filter and muffler for a vacuum pump Ejector type vacuum pump, comprising a rotationally symmetric ejector body (4) arranged in a house to be contained in a vacuum chamber (3) that extends axially and opens through a wall of the house, a dust filter (15) running concentrically about the ejec... | 05/13/2003 |
| 6464262 | Mechanical interface connection for vacuum ejectors, and a modular assembly for supplying negative pressure to an industrial process by means of at least one vacuum ejector driven by compressed air An assembly for generating a negative pressure in an industrial process includes a plurality of interconnected units formed with wedge-shaped connections in their mutually contacting surfaces. Intermediate units in the assembly, such as an ejector housing... | 10/15/2002 |
| 6394760 | Vacuum ejector pump An ejector includes two or more nozzles arranged in series. A stream of air fed at high velocity through the nozzle is used to create a negative pressure in an outer, surrounding space. The surrounding space is in flow communication with at least one slot... | 05/28/2002 |
