Controllable coolant pump

Details Controllable coolant pump Controllable coolant pump

2006-08-11

2011-10-18

Kramer, Devon C (Department: 3746)

Pumps

Motor driven

Electric or magnetic motor

C417S423140, C123S041090

Reexamination Certificate

active

08038419

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.

REFERENCES:
patent: 2824520 (1958-02-01), Bartels
patent: 4828455 (1989-05-01), Kinbara et al.
patent: 7334543 (2008-02-01), Pawellek
patent: 2002/0012583 (2002-01-01), Hesse
patent: 2006/0216166 (2006-09-01), Pawellek
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International Serch Report, Jan. 15, 2007.
“Die Kreiselpumpen” [Impeller-driven pumps] by C. Pfleiderer, Springer-Verlag, 4thEdition (1955), pp. 421-422 (with English translation of pertinent portions).

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