Shielding a bearing and seal assembly from undesirable matter

Details Shielding a bearing and seal assembly from undesirable matter Shielding a bearing and seal assembly from undesirable matter

2007-07-31

2007-07-31

Look, Edward K. (Department: 3745)

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between shaft or shaft sleeve and...

Seal

C415S231000

Reexamination Certificate

active

10524973

ABSTRACT:
A rotary pump includes an impeller mounted on a shaft (12) supported for rotation in bearings. A bearing and bearing casing assembly (26) proximate the impeller is prone to ingress of undesirable matter. A shield assembly (40) includes the shaft (12) and a shield (40) rotatable with the shaft and positioned intermediate the impeller and the bearing assembly (26). The shield comprises an integral, moulded, disc (42) and composite rim (44), which includes a lip (50) having an inwardly proud beading (52) normally touching an outer periphery (34.1) of the bearing assembly. A cowl (48) surrounds the lip with clearance when the shaft (12) rotates. The beading (52) dilates under centrifugal force to provide running clearance.

REFERENCES:
patent: 4428587 (1984-01-01), Forch
patent: 6485256 (2002-11-01), Iketani
patent: 2322458 (1974-11-01), None
patent: 19543764 (1997-05-01), None
patent: 1 050 700 (2000-11-01), None
patent: 507842 (1937-06-01), None
patent: 2369413 (2002-05-01), None
patent: 7 332 377 (1995-12-01), None
English Abstract of EP 1 050 700 dated Nov. 8, 2000.
English Abstract of JP 7 332 377 dated Dec. 22, 1995.

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