Patent ID: 8881963

Claim:
A pneumatic tool actuation device for use in an associated pneumatic tool having a naked trigger valve pin comprising: a housing having a piston drive chamber and an air inlet chamber formed therein, the housing having a fastener receiving opening, wherein the fastener receiving opening is configured to attach the actuation device to the pneumatic tool; a piston disposed within the piston drive chamber and configured to slidably move within the piston drive chamber, the piston having a piston head and a support plate, a shaft and an annular groove formed between the piston head and the support plate, the piston actuatable between a first condition where the piston is urged toward an open end of the drive chamber and a second condition where the piston is not urged toward the open end of the drive chamber; and an O-ring, wherein the O-ring is disposed in the annular groove and wherein the O-ring forms a seal between the piston and the piston drive chamber, and wherein movement of the piston actuates the trigger valve pin directly, without contact with a trigger of the pneumatic tool, wherein the piston drive chamber and the air inlet chamber are contiguous.