Variable flow water pump

Details Variable flow water pump Variable flow water pump

2007-03-06

2007-03-06

Look, Edward K. (Department: 3745)

Rotary kinetic fluid motors or pumps

With control means responsive to non-cyclic condition...

Temperature or fluid force responsive member

C415S131000, C415S157000

Reexamination Certificate

active

10182082

ABSTRACT:
A variable flow water pump includes a housing having an impeller mounted on a rotatable shaft. The pump impeller has a plurality, of vanes fixed to a back plate or flange. A circumferentially surrounding shroud is axially movable within the housing and may move between an open position and a covering position to expose or surround the vane portions and therefore control the effective working capacity of the pump. The shroud is controlled by an actuator and shift fork arrangement that responds to sensor measurements of temperature and/or engine speed to supply a sufficient quantity of coolant tailored to the actual need of the engine and without unwanted power loss caused by excessive flow.

REFERENCES:
patent: 2341985 (1944-02-01), Green
patent: 4726325 (1988-02-01), Itakura
patent: 4752183 (1988-06-01), Sakurai
patent: 4798517 (1989-01-01), Katsumoto et al.
patent: 4828454 (1989-05-01), Morris et al.
patent: 5169286 (1992-12-01), Yamada
patent: 6074167 (2000-06-01), Olifirov et al.
patent: 6796766 (2004-09-01), Hesse

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