Close Proximity Seal (e.g., Contactless, Fluent, Etc.) Patents (Class 277/301)
  • Patent number: 6059292
    Abstract: A speed reducer apparatus includes an auxiliary seal assembly to inhibit ingress of particulate matter. Preferably, the seal assembly is located axially outboard of a primary seal, such as a land riding seal. The seal assembly includes a plate defining a hole through which a rotatable member extends. The hole is sized to provide a predetermined gap between the inside surface of the plate and the outside surface of the rotatable member. An annular bead member is set in place from a viscous state about the rotatable member. In particular, the annular bead member extends across the gap between the plate and the rotatable member, functioning as a dam. Methods of forming the auxiliary seal assembly are also disclosed.
    Type: Grant
    Filed: May 8, 1997
    Date of Patent: May 9, 2000
    Assignee: Reliance Electric Industrial Company
    Inventor: Charles R. Firestone
  • Patent number: 5952080
    Abstract: A method for designing bearings, of improved performance, the load-bearing surfaces of which feature micropores about 2 to 10 microns deep and, preferably, aspect ratios on the order of 7 to 20. The hydrodynamic pressure distribution of a suite of bearing surfaces with different micropore geometries and densities is modeled numerically. The load-bearing surfaces of the bearings are fabricated with micropores having the optimal density and geometry determined by the numerical modeling. Conical micropores may be created by single laser pulses, with the pore size and shape controlled by controlling the laser beam profile, the laser beam power, and the optical parameters of the focusing system.
    Type: Grant
    Filed: June 3, 1998
    Date of Patent: September 14, 1999
    Assignee: Surface Technologies Ltd.
    Inventors: Izhak Etsion, Ofer Kinrot
  • Patent number: 5834094
    Abstract: A method for designing bearings, of improved performance, the load-bearing surfaces of which feature micropores about 2 to 10 microns deep and, preferably, aspect ratios on the order of 7 to 20. The hydrodynamic pressure distribution of a suite of bearing surfaces with different micropore geometries and densities is modeled numerically. The load-bearing surfaces of the bearings are fabricated with micropores having the optimal density and geometry determined by the numerical modeling. Conical micropores may be created by single laser pulses, with the pore size and shape controlled by controlling the laser beam profile, the laser beam power, and the optical parameters of the focusing system.
    Type: Grant
    Filed: September 30, 1996
    Date of Patent: November 10, 1998
    Assignee: Surface Technologies Ltd.
    Inventors: Izhak Etsion, Ofer Kinrot
  • Patent number: 5799951
    Abstract: A rotating sealing device for sealing between a wall separating two mediums under substantially different pressure and a rotatable shaft utilizes a combination of a liquid meatal seal comprising at least one liquid metal ring and a shield means which prevents contamination of the metal ring by gases coming into contact with the liquid metal. Magnetic fluid seal, a ring of an oil material, or inert gas may be used as a shield to protect the liquid metal.
    Type: Grant
    Filed: November 21, 1996
    Date of Patent: September 1, 1998
    Assignee: Varian Associates, Inc.
    Inventors: Weston A. Anderson, John E. Richardson