Abstract: A safety device for a power stapler includes a pushing member movably received in a magazine of a power stapler. The pushing member has a protrusion extending from a top thereof and a block is fixedly connected to a side of the protrusion. A sliding member is slidably connected to the barrel of the power stapler and a recess defined in an end of the sliding member. When the last staple runs out, the block on the pushing member is engaged with the recess of the sliding member to stop the movement of the sliding member and the ejecting mechanism.

Abstract: An exhausted air dispensing device for a hydraulic power nailer includes a ring engaged with a flange extending from a recessed area defined in an end cap of the body of the nailer. The flange has a plurality of notches which communicate with a passage from which the exhausted air of the nailer flows. The flange has a plurality of blocks extending from the ring and located in alignment with the notches in the flange so that the speed of the exhausted air is reduced when the exhausted air blows against the blocks. A cover has an opening defined in a periphery of the cover which is rotatably engaged with the recessed area. A positioning pin biasedly extends from the end cap and the cover has a plurality of dents in the bottom thereof so that the positioning pin is engaged with one of the dents of the cover.

Abstract: A power stapler includes a barrel with a cylinder received therein and a piston is movably received in the cylinder. An end cap is connected to the rear end of the barrel and a frame is movably engaged with the inside of the end cap. A seal part is engaged with an annular space in the outside of the frame and contacts the cylinder. A plurality of passages are defined through the frame and communicate with the annular space so that the seal part is securely positioned because the pressure in the passages is lower than the outside of the seal part. A fixed member is connected to the end cap and a pad is engaged with the fixed member. The pad has notches in the distal end thereof which contacts the piston so that air trapped between the pad and piston is released via the notches when the piston moves back to the original position after a shot.