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. 02, 2001
Filed:
Jan. 13, 2000
Frank Stähle, Neunkirch, CH;
Frideco AG, , CH;
Abstract
The present invention relates to a device for regulating the pumping capacity of constant-speed vertical-axis centrifuge pumps having an admission cross section with a weir, a suction orifice of a pump submerged in a reservoir that is open on top, an impeller axis, and a fluid inlet opening that emerges tangentially in the direction of the impeller rotation. The fluid inlet opening forms an opening in the weir and is located below the upper edge of the weir. The lower portion of a cylindrical reservoir wall is provided so that a rotational flow can be created in the reservoir. In the portion of the admission cross section that lies above the weir, and on the side of the fluid inlet opening that lies below the weir, there is a deflector plate, so that the fluid is deflected around the pump axis in the direction of rotation opposite to the above-mentioned rotational flow in the reservoir.