Patents Assigned to Umar, Inc.
  • Vertically adjustable manhole adjusting ring section
    Patent number: 5221155
    Abstract: A manhole adjusting ring includes ring sections each having a vertically disposed connecting plate which is selected from an inventory of different sized connecting plates to interconnect an outer ring portion to an inner ring portion. The resulting adjusting ring section will compliment the dimensions of the manhole casting including the distance from the top peripheral edge to the casting ledge on the inner wall.
    Type: Grant
    Filed: September 24, 1991
    Date of Patent: June 22, 1993
    Assignee: Umar, Inc.
    Inventor: Ronald E. Neil