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:
Oct. 25, 1994
Filed:
Oct. 15, 1993
Arnold Jager, 3167 Burgdorf, DE;
Other;
Abstract
An eccentric screw pump having a rigid rotor, which is embodied as a spiral and has a circular cross-sectional configuration, and also having a stator that is provided with an elastic lining that delimits a cavity which accommodates the rotor and has the form of a spiral with a cross-sectional configuration that essentially has the shape of a rectangle bounded on opposite sides by a respective semicircle. The sides of the essentially rectangular portion that interconnect the semicircles, proceeding essentially from the semicircles, are provided with projections that bulge convexly in a direction toward an interior of the cavity of the stator. In the vicinity of the inlet end of the stator, the projections bulge inwardly to a lesser extent than at the pressure side of the stator.