Ferrofluid seal apparatus and method

Details Ferrofluid seal apparatus and method Ferrofluid seal apparatus and method

1984-01-27

1984-10-23

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 1, 277135, F16J 1540, F16J 1554

Patent

active

044784244

ABSTRACT:
A ferrofluid seal apparatus and method, which ferrofluid seal apparatus comprises at least one ferrofluid seal about the surface of a rotatable shaft, the ferrofluid retained in a sealing relationship by magnetic flux from the ends of two pole pieces which define a cavity therebetween, and an interstage gap between the two pole pieces, which seal apparatus provides, within the single O-ring ferrofluid seal, a plurality of three separate regions of different magnetic-flux density, each of the regions having a different pressure value, the ferrofluid O-ring seal defining a ferrofluid exclusion seal between a first and second environment and the cavity, whereby the ferrofluid O-ring seal permits gas pressures from the cavity and the region environments to be transferred, on variations in pressures.

REFERENCES:
patent: 4340233 (1982-07-01), Yamamura et al.
patent: 4380356 (1983-04-01), Weghaupt

Affiliated with

Also associated with

Rating

Ferrofluid seal apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ferrofluid seal apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ferrofluid seal apparatus and method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1595476