Rotary kinetic fluid motors or pumps – Axially opposed working fluid paths to or from runner – Pump impeller means
Patent
1985-06-14
1987-04-07
Garrett, Robert E.
Rotary kinetic fluid motors or pumps
Axially opposed working fluid paths to or from runner
Pump impeller means
415143, 415170B, 4151994, F03B 1310, F04D 2916
Patent
active
046556818
ABSTRACT:
A multi-stage metallic pump or chemical pump with plural impellers arranged in series. The impeller of the 1st-stage is integrally provided with radial flow ribs on the under surface of the impeller and with backside radial ribs on the upper surface of the impeller, which are larger than the front radial flow ribs as regards the diameter of the circle formed by the tips of the respective ribs. A flange is formed as an extension beyond the circumference of the 1st-stage impeller and is integrally provided with a protruding ring on the upper surface of the flange. The protruding ring rotates in a fixed recess formed in a casing, with a certain gap kept. Because of the rotation, the liquid which flows into the clearance between the fixed wall of the casing and the rotating ring creates a turbulent flow there, preventing movement of air there through. As for liquid leaks, since the backside radial ribs are larger in outer diameter, they are higher in peripheral speed and pressure and thus force back the liquid migrating from the radial flow ribs. Thus the liquid is stopped. Therefore, no seal member is required.
REFERENCES:
patent: 1821772 (1931-09-01), Ruthman
patent: 1999163 (1935-04-01), Allen
patent: 2155452 (1939-04-01), Stelzer
patent: 3102680 (1963-09-01), Fogleman et al.
patent: 3190226 (1965-06-01), Judd
patent: 4526507 (1985-07-01), Bingler
patent: 4527947 (1985-07-01), Elliott
Mori Youji
Satou Kenichi
Garrett Robert E.
Pitko Joseph M.
World Chemical Co., LTD.
LandOfFree
Seal-less pump does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Seal-less pump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Seal-less pump will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1083793