US Patent 10357862 Pneumatically operated percussive tool driver with integral debris suction apparatus

A pneumatically operated tool driver has a debris suction apparatus including a dust gathering assembly fastened to the front head of tool driver and surrounding the tool, a venturi element mounted on the tool driver, and an air diverting apparatus that uses pressurized air to establish an airflow through the venturi element to create a suction upstream of the venturi element that draws debris from the dust gathering assembly to a dust collection site. The air diverting apparatus obtains the pressurized air from an exhaust diverter that captures pressurized exhaust air expelled through the tool driver's exhaust port, and from a capillary tube coupled to the tool driver's inlet air port.