Percussive dental extractor

Abstract

A pneumatically operated percussive dental extractor includes a main body having a central longitudinal chamber. A replaceable hook member is attached to the distal end of the main body. Mounted in the longitudinal chamber at a proximal end thereof is an anvil. Reciprocally mounted in the longitudinal chamber for movement from a distal end thereof to engagement with the anvil is a piston. A driving device selectively drives the piston pneumatically from the distal end of the chamber into percussive engagement with the anvil. A return device automatically returns the piston from engagement with the anvil to the distal end of the chamber. The driving device includes a coupling located at the proximal end of the main body for connecting the driving device to a source of pneumatic pressure and a trigger device for selectively connecting the source of pneumatic pressure to the distal end of the chamber. The trigger device includes an actuator which is radially moved to connect the pneumatic source to the distal end of the chamber. The driving device further includes a control device for controlling the pneumatic pressure exerted on the piston and a hollow shaft which extends from the proximal end to the distal end of the chamber with an air outlet at a distal end thereof into the distal end of the chamber. The piston is then mounted for movement about the hollow shaft, and the return device includes a compression spring located about the hollow shaft between the piston and the anvil.

Dependencies are inferred from the claim text.