Patents Assigned to Atlas Fluid Controls Inc.
  • Patent number: 5467800
    Abstract: A rotary servo valve includes a valve body having a longitudinal bore therethrough. A sleeve fits into the bore. The wall of the sleeve is perforated by two groups of port openings, each group includes a plurality of sets of radially-disposed ports. In each group, the central longitudinal axis of one set of ports is radially displaced from the central longitudinal axis of one other set of ports by a preselected angular displacement. At least a third set of ports in one group is in continuous fluid communication with a source of pressurized fluid; at least a third set of ports in the other group in continuous fluid communication with a return sump. A hollow rotary control member consists of two internal chambers. Each chamber includes a number of sets of apertures that are radially disposed around the walls of the chambers, spaced-apart by a preselected angular separation.
    Type: Grant
    Filed: November 10, 1994
    Date of Patent: November 21, 1995
    Assignee: Atlas Fluid Controls Inc.
    Inventor: John J. Sallas
  • Patent number: 5235746
    Abstract: A servo valve body is made by first boring a central cylindrical passageway, for receiving a valve spool, through an elongated, substantially rectangular valve block of tool steel. A plurality of cross slots are cut through the valve block, from one side through to the opposite side, at intervals along the length of the block, orthogonally to the axis of the passageway. The cross slots are cut by use of electronic discharge machining technology. The cross slots serve as fluid flow chambers when the cross slots are terminated by transition plates secured to the opposite sides of the valve block. The transition plates provide fluid inlet, outlet and drain ports. The valve block in combination with the transition plates comprises the servo valve body.
    Type: Grant
    Filed: March 19, 1992
    Date of Patent: August 17, 1993
    Assignee: Atlas Fluid Controls Inc.
    Inventor: Marc B. Leonard