Rotation speed and direction control for tool with pneumatic drive system has control member at rear end of tool with air ports lining up with ports in valve body

摘要

The airflow control system (10) incorporates a cylinder (20) with ports (23,24) connected to the central air chamber. A valve body (30) fits into the end of the cylinder body (21) and has extension air ports (32) and air outlet apertures (33) in its outside diameter. There are air inlet ports (34) in the central channel (311). A rotatable control body (40) fits inside central channel and has air ports (42).