Patents Assigned to ABB Vetco Gray (Brasil) S.A.
  • Balanced retention valve
    Patent number: 5195723
    Abstract: A retention balanced valve, particularly for great depth oil prospection, has a plunger and a plunger guide displaceable inside a cylindrical valve body which is closed in one extremity. The plunger provides the sealing of lateral openings of the valve body and covers seal rings. When the plunger is displaced by an external actuation force against the force of a spring, it deobstructs the openings and allows the displacement of the plunger guide until a protection nut associated to the plunger guide covers the sealing rings.
    Type: Grant
    Filed: May 28, 1992
    Date of Patent: March 23, 1993
    Assignee: ABB Vetco Gray (Brasil) S.A.
    Inventors: Bruno Schauerte, Ricardo Moreira Seixas