A surgical instrument that includes a distal member configured to receive a pneumatically operated tool assembly therein. The instrument may also include an elongate shaft assembly that has a distal end portion that is coupled to the distal member and a proximal end portion. A drive member may be supported...http://www.google.ca/patents/US20080029574?utm_source=gb-gplus-sharePatent US20080029574 - Pneumatically powered surgical cutting and fastening instrument with actuator at distal end
