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:
Jun. 30, 1987
Filed:
Jun. 03, 1985
Applicant:
Inventor:
Hannu Sarvanne, Vantaa, FI;
Assignee:
Oy E. Sarlin AB, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04D / ;
U.S. Cl.
CPC ...
4152 / ; 416185 ;
Abstract
An impeller for a pump, especially a vortex pump, provided with one or more straight or curved vanes arranged radially. Vortex pumps are used e.g. for pumping sewage, for which purpose they are well adapted. However, a drawback with such pumps known so far has been a rather low efficiency and a low lift curve. In the vortex pump of the invention, this problem is eliminated by providing the edges of the vanes with flanges essentially perpendicular to the vane surface.