Patents Assigned to Fetterolf Corporation
  • High pressure valve
    Patent number: 4867197
    Abstract: An arrangement for providing access to the seal rings of a seatless high pressure valve includes an aperture in the valve body and a demountable sealed closure for the aperture. The sleeve within the valve body for transmitting the gland force to the seal rings is made in segments small enough for removal through the aperture to permit access to the seal rings. The valve seal rings may accordingly be replaced without disassembly of the major valve components including the valve plunger and gland.
    Type: Grant
    Filed: February 15, 1989
    Date of Patent: September 19, 1989
    Assignee: Fetterolf Corporation
    Inventors: Andrew M. Ritter, John S. Fetterolf, James W. Williams, 3rd
  • Spectacle line blind with vent
    Patent number: 4452278
    Abstract: A spectacle line blind includes a pivotable or rotatable spectacle plate having at one end a conventional full opening providing little obstruction to flow of liquid or gas. On the other end of the spectacle valve plate a blank disc seals one of said inlet and outlet ducts. The opposite side of this blank disc includes spacers having axial and radial openings therebetween which permit gases to vent to the atmosphere from the other duct.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: June 5, 1984
    Assignee: Fetterolf Corporation
    Inventor: Joseph Quinn
  • Line blind
    Patent number: 4343332
    Abstract: A line blind includes seal rings on either side of a spectacle plate interposed in a pipe, and a special camming arrangement including two cooperating sets of longitudinally directed sloping teeth circularly arranged which operate on slight rotational movement of one, while the other is held stationary, to force engagement under pressure between the seal rings and the plate.
    Type: Grant
    Filed: August 27, 1979
    Date of Patent: August 10, 1982
    Assignee: Fetterolf Corporation
    Inventors: James W. Williams, 3rd, John S. Fetterolf