Patents Assigned to RP Oy Teollisuuden ja Rakentaijain Palvelukeskus
  • Conduit collar and method of installing the collar
    Patent number: 5340166
    Abstract: The invention relates to a conduit collar and method for installing the conduit collar in a circular hole through concrete and stone structures used in industrial construction work. The conduit collar includes at least one circumferential rib with an outer perimeter having a diameter larger than the diameter of the hole before the collar is installed into the hole. The outer perimeter of at least one of the circumferential ribs conforms to fit inside the hole when the collar is installed into the hole.
    Type: Grant
    Filed: July 10, 1992
    Date of Patent: August 23, 1994
    Assignee: RP Oy Teollisuuden ja Rakentaijain Palvelukeskus
    Inventors: Martti Puttonen, Vesa Juusti, Pekka Juusti