FERROFLUID SEALING APPARATUS FOR A RECIPROCATING SHAFT
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
Sep 8, 2011
app pub date -
Mar 4, 2011
filing date -
Mar 8, 2010
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A ferrofluid sealing apparatus for a reciprocating shaft, in which the first bearing, the first magnetism isolating rings, the first pole piece, the first O-shaped rubber seal, a magnet, the second O-shaped rubber seal, the second pole piece, the second magnetism isolating ring, and the second bearing are sandwiched between the two inner bosses of the outer casing in series, an end cover is fixed on the outer casing by means of screws so that the second bearing is pressed, there are provided with three step holes in the inner torus of the second (13) pole piece as the left step hole, the middle step hole, and the right step hole, in which N+1 of elastic rings (T) and trapezoidal teeth (C) are arranged closely with interval of the middle step hole, where N is a positive integer in 1 to 8, the teeth and rings are connected with the second pole piece by means of screws and shield rings (15), the N of trapezoidal teeth (C) are arranged with the same expanding direction of their inner holes, the first pole piece has the same structure with the second pole piece. The invention can overcome the problems of loss of ferrofluid, decrease of the sealing life, and increase of the leakage rate.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully