Abstract: A firearm trigger assembly is provided. The firearm trigger assembly includes first and second trigger elements having independent pivot points. The first and second trigger elements can also each incorporate rolling contact elements to minimize frictional contact between one another and the remainder of a firing mechanism incorporating the trigger assembly.

Abstract: A fluid powered gripper assembly includes a central cavity between gripper arms for such things as receiving a sensor or receiving a tool to work the workpiece or for receiving a part for mounting to a top portion of a workpiece held between gripper arms. The fluid powered gripper assembly generally comprises a housing which includes a body defining a cylindrical piston chamber, a cover which encloses the piston chamber and a sleeve extending through the body and the cover to provide a through hole. The through hole extends through a first side of the cover and a second side of the body at a point generally intermediate the gripper arms. This provides access to the top side of the workpiece held between gripper arms or alternatively provides a mechanism for mounting a sensing unit intermediate the gripper arms for sensing a characteristic of the workpiece held between gripper arms. The gripper assembly includes a pneumatically powered piston mounted for reciprocation in the piston chamber.