Patent ID: 7850751
Filing Date: 2010-12-14
Classification: B01D,F16J,Y10T

Abstract:
1. An access cover for use on a piping or vessel, comprising: a cover plug configured to fit within an opening of the piping or vessel adjacent an annular groove in the piping or vessel; an actuator cam positioned adjacent the cover plug; a plurality of idler cam plates surrounding the actuator cam, each of the plurality of idler cam plates pivotably connected to the plug cover and including exterior edges configured to cooperate with the annular groove; and a plurality of mechanisms, each of the plurality of mechanisms attached to the actuator cam and one of the plurality of idler cam plates, wherein when the cover plug is fitted within the opening, rotation of the actuator cam in a first direction or a second direction causes each of the plurality of mechanisms to push or pull, respectively, each of the plurality of idler cam plates, thereby pivoting the plurality of idler cam plates such that the exterior edges engage or disengage with the annular groove, respectively.