Abstract: A pneumatic tool for joining steel decking includes a pneumatic actuator assembly which drives a push rod. The push rod is coupled to a linkage assembly including a rocker link having one end coupled to the frame of the tool, a punch arm having one end coupled to the frame, and a coupler link rotatably coupled to both the rocker link and the punch arm. At the bottom of the tool, a punching mechanism is formed. A trigger mechanism releases a flow of pressurized air into the actuator assembly, thereby driving the push rod out of the housing of the actuator assembly. Movement of the push rod causes the rocker link to rotate about a joint link, thereby driving the coupler link toward the punch arm and causing the punch to rotate about the joint link and mate with the fixed die.

Abstract: A pneumatic tool for joining steel decking includes a pneumatic actuator assembly which drives a push rod. The push rod is coupled to a linkage assembly including a rocker link having one end coupled to the frame of the tool, a punch arm having one end coupled to the frame, and a coupler link rotatably coupled to both the rocker link and the punch arm. At the bottom of the tool, a punching mechanism is formed. A trigger mechanism releases a flow of pressurized air into the actuator assembly, thereby driving the push rod out of the housing of the actuator assembly. Movement of the push rod causes the rocker link to rotate about a joint link, thereby driving the coupler link toward the punch arm and causing the punch to rotate about the joint link and mate with the fixed die.