Pump system

Details Pump system Pump system

2004-10-15

2010-06-01

Freay, Charles G (Department: 3746)

Pumps

Motor driven

Electric or magnetic motor

C417S423100, C415S172100, C415S170100, C604S891100

Reexamination Certificate

active

07726955

ABSTRACT:
A pump system having a pump module (10) comprising a stator housing (28) with a chamber (30), a rotor (32) rotatably and axially slidably received in the chamber and comprising a first axial extension (46) with a liquid supply channel (50) and a second axial extension with a liquid supply channel (52), the first and second axial extensions having different diameters, and first and second sealing rings (54, 56), mounted around the first and second axial extensions.

REFERENCES:
patent: 3045134 (1962-07-01), Mould, Jr.
patent: 3647314 (1972-03-01), Laessig
patent: 4152098 (1979-05-01), Moody et al.
patent: 4883467 (1989-11-01), Franetzki et al.
patent: 5219276 (1993-06-01), Metzner et al.
patent: 5704767 (1998-01-01), Johnson
patent: 6179596 (2001-01-01), Weisener et al.
patent: 2009/0123309 (2009-05-01), Hilber et al.

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