Patents Assigned to R.M.I. Holland B.V.
  • Gate valves and methods of connecting same
    Patent number: 5285951
    Abstract: A method of connecting pipes to a gate valve assembly includes the steps of turning a wedge-shaped valve member having a heat sensitive sealing disc to a fully open position so that the disc is further away from a weld seam than when the disc is in a closed position. A pipe is then sealed to the gate valve assembly while the heat sensitive sealing disc is in the open position. Heat from the sealing operation is thus prevented from damaging the heat sensitive sealing disc.
    Type: Grant
    Filed: February 3, 1992
    Date of Patent: February 15, 1994
    Assignee: R.M.I. Holland B.V.
    Inventors: Andreas P. A. Dierikx, deceased, by Johannes Kranenburg, legal representative, Arthur A. J. M. Van Hooijdonk
  • Gate valves
    Patent number: 5085403
    Abstract: The gate valve assembly forms a very efficient seal which incorporates a wedge-shaped valve body assembly having resilient valve-sealing elements which are made of such material as to be sensitive to destruction or detrimental effect from excess heat during manufacture of the gate valve.
    Type: Grant
    Filed: July 20, 1990
    Date of Patent: February 4, 1992
    Assignee: R.M.I. Holland B.V.
    Inventor: Petrus A. Dierikx