Patents Assigned to Sigmon Corporation
  • Patent number: 3977648
    Abstract: A valve in which a valve member is mounted for rotary valving motion within a valve casing and an actuator in which at least one pair of expansible bellows engaging opposite sides of a vane and acting in opposition one to the other give rise to rotary motion. The bellows preferably are free from any direct fixation to the vane or the like, and have a particular configuration as described.
    Type: Grant
    Filed: June 27, 1974
    Date of Patent: August 31, 1976
    Assignee: Sigmon Corporation
    Inventor: James W. Sigmon