Patent ID: 8851451
Filing Date: 2014-10-07
Classification: C10B,F16K,Y10T

Abstract:
1. A valve actuator for opening and closing a gate of a valve comprising: a support tower having at least one longitudinal groove, each longitudinal groove forming opposing internal surfaces; a housing assembly having a threaded internal surface and at least one wear block that extends into the at least one longitudinal groove to prevent the housing assembly from rotating, wherein rotation is prevented when the at least one wear block contacts one of the opposing internal surfaces of the at least one longitudinal groove; a rotating screw comprising a threaded external surface structured to directly engage the threaded internal surface of the housing assembly to axially displace the housing assembly when the rotating screw rotates, wherein when the housing assembly is axially displaced, the at least one wear block slides axially within the at least one longitudinal groove; and a valve stem coupled at a first end to the housing assembly and coupled at a second end to the gate of the valve.