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:
Mar. 20, 2018
Filed:
Feb. 06, 2014
Applicant:
Wilo SE, Dortmund, DE;
Inventors:
Guenter Strelow, Bochum, DE;
Thomas Mueller, Dortmund, DE;
Roland Stracke, Unna, DE;
Viktor Warkentin, Dortmund, DE;
Assignee:
WILO SE, Dortmund, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04C 2/107 (2006.01); F04C 14/28 (2006.01); F01C 1/10 (2006.01);
U.S. Cl.
CPC ...
F04C 14/28 (2013.01); F01C 1/10 (2013.01); F04C 2/1075 (2013.01); F04C 2/1076 (2013.01); F04C 2250/30 (2013.01);
Abstract
An eccentric screw pump comprising an outer part () and an inner part () therein, one of the parts () being driven rotatably and the other part () being able to move eccentrically relative to the other part (). The screwthreads () of the outer part () extend angularly over less than an entire helix along the axial length (L) of the part, so that during operation pumping chambers that are open to both ends are created, through which sudden pressure relief takes place.