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. 25, 2001
Filed:
Jun. 18, 1999
Applicant:
Inventor:
Sebastian Jäger, Hannover, DE;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 4/00 ;
U.S. Cl.
CPC ...
E21B 4/00 ;
Abstract
A Moineau machine has an outer tubular member and an inner tubular member mounted in the outer tubular member whereby the inner tubular member is movable in the axial direction of the outer tubular member but is axially securable in a desired position relative to the outer tubular member. The inner tubular member has an inner surface. An inner elastomer lining is fixedly connected to the inner surface. The inner tubular member has a wall thickness smaller than the outer tubular member. The inner tubular member has opposed ends wherein at least one of the opposed ends is sealed relative to the inner wall of the outer tubular member.