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. 24, 2013
Filed:
Aug. 06, 2009
Sigurd Ree, Loddefjord, NO;
Sigurd Ree, Loddefjord, NO;
AGR Subsea AS, Straume, NO;
Abstract
An outer rotor of a progressive cavity pump includes at least one inner helical rotor with Z external thread starts and at least one adapted outer rotor with a helical cavity with Z+1 internal thread starts. The at least one outer rotor is assembled from several concentric rotor inserts axially following closely one after another, with helical cavities and Z+1 internal thread starts. Each rotor insert is closely surrounded by and concentrically fixed in a common rigid rotor sleeve. There is detachably connected to the rotor sleeve at least one removable end piece with a principally concentric hollow axially extending through it. The through hollow of the end piece or end pieces forms a gradual transition between a principally circular cross section furthest out and a cross section adapted to the helical cavities of the rotor inserts nearest to them.