Dynamic lip seal using ferrofluids as sealant/lubricant

Details Dynamic lip seal using ferrofluids as sealant/lubricant Dynamic lip seal using ferrofluids as sealant/lubricant

1977-04-04

1979-10-23

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

F16S 1556

Patent

active

041718186

ABSTRACT:
A seal for rotatable shafts utilizes a ferrofluid as a sealant and lubricant. As a sealant, the ferrofluid acts to exclude particulate matter from passing through the seal area contaminating internal mechanism elements, while as a lubricant, the ferrofluid forms a film between the shaft and the elastomer-material seal element; thus, cooling and lubricating the contact interface and acting to extend the life of the related components. The seal assembly has permanent magnetic elements which create a magnetic-field gradient, causing magnetic-field maxima at points immediately surrounding the contact point between the seal-elastomer material and the shaft. The ferrofluid is entrained magnetically within the interface region; thus, insuring continual lubrication of the contacting surfaces, while further, the entraining forces prevent leakage of the ferrofluid from the region.

REFERENCES:
patent: 3612549 (1970-05-01), Berkowitz
patent: 3659306 (1972-05-01), Stoltze et al.
patent: 3848879 (1974-11-01), Hudgins

Affiliated with

Also associated with

Rating

Dynamic lip seal using ferrofluids as sealant/lubricant does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dynamic lip seal using ferrofluids as sealant/lubricant, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamic lip seal using ferrofluids as sealant/lubricant will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-407182