Device for use in beating or refining machines

Details Device for use in beating or refining machines Device for use in beating or refining machines

1977-01-24

1978-10-03

McCarthy, Edward J.

Agitating

Stationary mixing chamber

366244, 366262, B01F 700

Patent

active

041188004

ABSTRACT:
Sealing device for preventing leakage of pressurized medium from the housing of a defibrator, refiner and the like, in which lignocellulosic pulp material is ground between two grinding discs, one of which is mounted on a drive shaft to rotate relative to the other within the pressurized housing. The sealing device comprises a pump having a stationary housing sealed to the defibrator housing and spaced from the drive shaft to define a gap extending into the interior of the defibrator housing. The pump impellers are mounted to rotate with the drive shaft to pump a sealing fluid to a pressure higher than that prevailing within the defibrator housing and propel the thus pressurized fluid through the gap into the defibrator housing to thereby prevent leakage of the pressurized medium through the drive shaft opening in the defibrator housing.

REFERENCES:
patent: 1489786 (1924-04-01), Povey
patent: 2441711 (1948-05-01), McFadden
patent: 2477929 (1949-08-01), Hetherington
patent: 3752489 (1973-08-01), Latineh
patent: 3921962 (1975-11-01), Feger

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