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:
Jan. 03, 2017
Filed:
Mar. 08, 2012
Applicant:
Sigurd Ree, Loddefjord, NO;
Inventor:
Sigurd Ree, Loddefjord, NO;
Assignee:
ENHANCED DRILLING AS, Straume, NO;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D 1/14 (2006.01); F04D 29/24 (2006.01); F04D 29/44 (2006.01); F04D 29/62 (2006.01); F04D 5/00 (2006.01); F04D 7/04 (2006.01); F04D 29/60 (2006.01);
U.S. Cl.
CPC ...
F04D 1/14 (2013.01); F04D 5/001 (2013.01); F04D 7/04 (2013.01); F04D 29/242 (2013.01); F04D 29/445 (2013.01); F04D 29/605 (2013.01); F04D 29/628 (2013.01);
Abstract
A pump varies output flow. For all cross-sections, which are vertical to the axis of rotation between axial outer positions for the cross-sectional areas of flow at the periphery of the impeller, the inner wall of the pump housing forms approximately circular profiles. The approximately circular profiles are mainly concentric and have a continuously increasing radius from one toward the other one of the axial outer positions. A tongue, which truncates the outlet or diffuser of the pump from an annulus of the pump housing, does not contact the circular profiles between the axial outer positions.