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. 18, 2011
Filed:
Aug. 11, 2006
Eugen Schmidt, Merbelsrod, DE;
Franz Pawellek, Lautertal, DE;
Eugen Schmidt, Merbelsrod, DE;
Franz Pawellek, Lautertal, DE;
Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt, Merbelsrod, DE;
Abstract
A controllable coolant pump for internal combustion engines driven by torque transmission elements has a pump housing, a driven shaft mounted in the pump housing, an impeller wheel arranged fixedly in terms of rotation on a free, flow-side end of the shaft, and a pressure-activated valve slide having an outer cylinder covering the outflow region of the impeller wheel in a variable manner. The valve slide is of annular configuration and is arranged on piston rods mounted displaceably in the pump housing. An annular piston mounted in an annular groove in the pump housing and movable in a defined manner in the annular groove via excess pressure or vacuum is arranged on the piston rods in a manner lying opposite the valve slide.