Abstract: The present invention is a muffler for pneumatic tools. The invention includes a hollow nozzle, with the exhaust port being reduced, and some orifices placed at the center thereof. A connector is assembled into the air inlet of the nozzle that allows it to be coupled to a pneumatic tool. A cover is mated externally onto the exhaust port of the nozzle to accommodate an orifice and air vent of the nozzle. Some exhaust holes are provided onto the surface of cover. A noise deadener is installed between the surface of the cover and orifice of nozzle. The air vents are placed at a reduced wall around an orifice of the nozzle, such that some fluid can flow through the unreduced cross-section, thus maintaining proper pressure and reducing the noise level for an improved performance.

Abstract: An air-guiding structure for an air sander includes a muffler assembly integrally formed from plastic material, a main passageway and a sub-passageway formed in the muffler assembly, a dust collection port formed at a bottom end of the sub-passageway, and a baffle integrally formed within the main passageway to divide the main passageway into a front section and a rear section. One side of the main passageway communicates with the sub-passageway, and the main passageway has a joint port and an exhaust port opposite to the joint port. The joint port and the dust collection port of the muffler assembly connect to the outlet port and joint port of the air sander, respectively. The baffle is formed with a predetermined number of thin holes to communicate the front section with the rear section, wherein the rear section of the main passageway communicates with the sub-passageway.

Abstract: An air-guiding structure for an air sander includes a muffler assembly integrally formed from plastic material, a main passageway and a sub-passageway formed in the muffler assembly, a dust collection port formed at a bottom end of the sub-passageway, and a baffle integrally formed within the main passageway to divide the main passageway into a front section and a rear section. One side of the main passageway communicates with the sub-passageway, and the main passageway has a joint port and an exhaust port opposite to the joint port. The joint port and the dust collection port of the muffler assembly connect to the outlet port and joint port of the air sander, respectively. The baffle is formed with a predetermined number of thin holes to communicate the front section with the rear section, wherein the rear section of the main passageway communicates with the sub-passageway.

Abstract: A flexible shroud for an air sander. The flexible shroud has a sealing edge contacting a sanding member of the air sander at a rim of the shroud, wherein the sealing edge is bent inward to form a contact surface in surface contact with the sanding member.