Magnetic seal
AssigneeInpro Companies, Inc.
InventorsDavid C. Orlowski, Heinz P. Bloch
Life of this patent
Estimating the term…
Abstract
A magnetic seal for rotating shafts having a first and second annular members. Each of the annular members having a source of magnetic force with the lines of magnetic force being axially aligned with the shaft. A stationary insert positioned in said housing and having a sealing face adjacent the annular members. The first and second annular rings being rotatively connected with the second ring being sealed to the shaft and a face related to the second member for sealing contact with the face of the insert. The first of the rings secured to the shaft for annular rotation.
Claims17
A magnetic-type seal for sealing a rotating shaft exiting a housing comprising:
- a housing;
- a shaft extending through said housing;
- a first annular member surrounding said shaft including a source of magnetic force secured therein with the magnetic force applied axially, means for securing said first annular member to said shaft;
- a second annular member surrounding said shaft including a source of magnetic force secured therein with the magnetic force being of like polarity to said magnetic force in said first annular member and applied axially to repel said annular members, means for sealing said second annular member around said shaft;
- a sealing face surrounding said shaft on the side of said second annular member opposite from said first annular member;
- drive means for rotatively connecting said first and second annular members;
- a stationary insert positioned in said housing surrounding said shaft and sealed to said housing, said insert having a face perpendicular to said shaft and aligned with said sealing face and said second annular member, said repelling magnetic forces forcing said sealing face into compressive contact with said face on said stationary insert to seal said housing.
Dependencies are inferred from the claim text.