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:
Nov. 10, 2009
Filed:
Feb. 22, 2006
Ann Valerie Van Der Heggen, Kasterlee, BE;
Benjamin Moens, Schelle, BE;
Ann Valerie Van Der Heggen, Kasterlee, BE;
Benjamin Moens, Schelle, BE;
Atlas Copco Airpower, Naamloze Vennootschap, Wilrijk, BE;
Abstract
Improved water-injected screw compressor element which mainly consists of a housing () on the one hand, confining a rotor chamber () with an inlet () on one far end and an outlet () on the other far end and in which two co-operating rotors () are provided which are bearing-mounted in the housing () with their shaft () by means of water-lubricated bearings (), characterised in that for every rotor are provided two pistons, a first piston () and a second piston () respectively, which can be each axially shifted in a guide, whereby each of these pistons () makes contact with the rotor () concerned with one side or is part of it, and makes contact with a pressure chamber () with an opposite side, in order to partly or almost entirely compensate for axial force components exerted by the compressed gasses on the rotors.