Grooved pumping seal

Details Grooved pumping seal Grooved pumping seal

1998-04-14

2000-11-21

Knight, Anthony

Seal for a joint or juncture

Seal between relatively movable parts

Close proximity seal

277430, F16J 1540

Patent

active

061491616

ABSTRACT:
An improved seal for a hydrodynamic bearing which aids in making the bearing less sensitive to changes in load and rotational speed, which is especially useful in hydrodynamic bearing motor in which the bearing is open at both the upper and lower ends. Additionally, a hydrodynamic bearing open at both ends in which the balance of fluid flow or pressure within the total system is maintained, and a seal usable to make a hydrodynamic bearing which is as stiff or stiffer than known standard spindle motors with hydrodynamic bearings which are supported only at one end. Also, a pumping seal useful in a hydrodynamic bearing design to maintain balanced internal fluid pressures during operation to minimize the likelihood of any lubricating fluid being lost during operation is disclosed.

REFERENCES:
patent: 2526594 (1950-10-01), Voysey
patent: 4726693 (1988-02-01), Anderson et al.
patent: 5112142 (1992-05-01), Titcomb et al.
patent: 5559651 (1996-09-01), Grantz et al.
patent: 5631761 (1997-05-01), Lee
patent: 5667309 (1997-09-01), Nose

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