Differing Capillary Properties Patents (Class 384/411)
  • Bearing assembly for a miniature motor
    Patent number: 5899572
    Abstract: A bearing assembly 10 comprising an oil impregnated sintered bushing 15 supported by a bearing retainer 20 and a sintered oil collector 14 disposed in direct physical contact with an external surface of the bushing 15 to remove excess oil from the bushing. The oil collector 14 is preferably substantially oil free or non-impregnated, has a volume at least 10% that of the bushing and has a porosity which is 5 to 10% greater than the porosity of the bushing.
    Type: Grant
    Filed: April 8, 1997
    Date of Patent: May 4, 1999
    Assignee: Johnson Electric S.A.
    Inventor: Georg Strobl
  • Shaft bearing assembly for a miniature electric motor
    Patent number: 5098206
    Abstract: A shaft bearing assembly, particularly for a miniature electric motor. In the case of the present shaft bearing assembly, an oil-impregnated dampening disc made of an absorbent material the capillary action of which is greater than that of the porous bearing block is disposed between the thrust collar of the shaft and the axial end face of the bearing block. The shaft bearing assembly is particularly suitable for electric motors of smaller size and is effective in reducing motor noise.
    Type: Grant
    Filed: February 22, 1991
    Date of Patent: March 24, 1992
    Assignee: Interelectric AG
    Inventor: Bodo Futterer