Bearing air seal for vacuum cleaner motor

Details Bearing air seal for vacuum cleaner motor Bearing air seal for vacuum cleaner motor

1984-02-03

1985-07-09

Husar, Cornelius J.

Pumps

Motor driven

Including means utilizing pump fluid for augmenting cooling,...

417423A, F04B 3906

Patent

active

045279608

ABSTRACT:
A combination motor-fan unit for wet pick-up vacuum cleaner applications is provided with a flow of sealing air past the bearing located between the motor and the fan. The housing supporting the bearing is provided with a diffusing chamber on the fan side of the bearing and a restricted air flow path through the housing to the diffusing chamber to utilize the motor cooling air as a source for the bearing sealing air. A check valve is provided in the restricted air flow path.

REFERENCES:
patent: 2031911 (1936-02-01), Smellie
patent: 2422968 (1947-06-01), Jason
patent: 3733150 (1973-05-01), Porter et al.
patent: 4088424 (1978-05-01), Hyatt et al.
patent: 4226575 (1980-10-01), Hyatt et al.

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