Patent ID: 6813837
Filing Date: 2004-11-09
Classification: B24B,B26B,B27B,Y10T

Abstract:
A bi-directional rotation pneumatic cutting machine comprising an operation section which has an actuator to drive an output shaft to rotate in two directions and a fastening mechanism coupled on the output shaft, wherein the fastening mechanism includes:a coupling head which has two ends communicating with each other and first reverse threads formed in the interior for fastening to the output shaft; an anchor member which has two ends communicating with each other and second reverse threads formed on an outer wall of one end thereof to engage with the coupling head; and a fastener which has one end with first positive threads formed thereon to run through the anchor member and engage with second positive threads formed on the output shaft; wherein the positive threads and the reverse threads are engageable with each other to allow the pneumatic cutting machine to rotate in a positive direction or a reverse direction according to different requirements without loosening and direct sparks, cutting debris or dusts generated in cutting processes in a desired direction without polluting environment or hurting people and working pieces.