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:
Apr. 01, 2008
Filed:
May. 26, 2006
Applicant:
Ennio Cattani, Parma, IT;
Inventor:
Ennio Cattani, Parma, IT;
Assignee:
Esam S.p.A., Parma, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04D 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An impeller, set in rotation by a motor, provided with blades and enclosed in a casing which defines a circumferential annular conduit in which the blades turn. The annular conduit exhibits two openings, respectively an induction mouth for aspirating fluid from outside the machine, and a delivery mouth from which the fluid exits from the machine. The machine also comprises a further opening which is neither the induction mouth nor the delivery mouth, afforded on the casing and defining a passage which places an inside of the casing in communication with an outside environment.