F - Mech Eng,Light,Heat,Weapons – 16 – J
Patent
F - Mech Eng,Light,Heat,Weapons
16
J
277/12
F16J 15/14 (2006.01) F16J 15/43 (2006.01)
Patent
CA 1208249
ABSTRACT A ferrofin magnetic-fluid seal is provided for hermetically sealing the space between a portion of a rotating member of magnetically permeable material and a portion of a close-fitting, spaced-apart stationary member also fabricated from magnetically permeable material and comprising a part of a housing for journalling the rotating member. The ferrofin magnetic-fluid seal is comprised of a plurality of concentric, fin-like projections of magnetically permeable material formed on each of the rotating member and the stationary member in spaced-apart opposing relation to define a purality of magnetic gap regions. The magnetic ferrofluid is disposed within the magnetic gap regions. A magnetic field producing means is magnetically coupled in closed magnetic circuit relationship with at least the portions of the rotating and stationary members, the opposed fin-like projections and the magnetic ferrofluid trapped in the magnetic gaps defined between the opposing ends of the fin-like projections. The new and improved ferrofin magnetic-fluid seal can be used either alone or in conjunction with a centrifugal seal to form a combination magnetic/ centrifugal fluid-seal.
424155
Pinkus Oscar
Walowit Jed
Johnson & Hicks
Mechanical Technology Incorporated
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