Self-pumping pump shaft seal

Details Self-pumping pump shaft seal Self-pumping pump shaft seal

1984-11-14

1986-08-19

Vrablik, John J.

Rotary expansible chamber devices

Heat exchange or non-working fluid lubricating or sealing

With pump for non-working fluid

418104, 418206, 415170B, 277 961, 277133, F04C 218, F04C 1500, F16J 1534, F16J 1554

Patent

active

046067124

ABSTRACT:
A positive displacement pump is provided with an impeller drive shaft seal assembly to prevent material in the pumping chamber from reaching an adjacent drive shaft chamber. The seal assembly comprises a rotary seal member mounted on the impeller having an outer surface spaced a non-uniform distance from the inner surface of a member defining the drive shaft chamber so that when the drive shaft is rotated the changing distance between the inner and outer surfaces causes a pumping action to occur so that material is continually pumped around the seal assembly.

REFERENCES:
patent: 1699385 (1929-01-01), Whittingham
patent: 2108701 (1938-02-01), Amberg
patent: 2672823 (1954-03-01), Thomson et al.
patent: 2768011 (1956-10-01), Mosher
patent: 3031198 (1962-04-01), Hudson
patent: 3746350 (1973-07-01), Mayer et al.
patent: 3799713 (1974-03-01), Cloots et al.
patent: 3843140 (1974-10-01), Mayer et al.
patent: 4026564 (1977-05-01), Metcalfe
patent: 4095806 (1978-06-01), Dempsey
patent: 4128362 (1978-12-01), Shepherd et al.
patent: 4323255 (1982-04-01), Wiese

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