Pneumatic impact tool and piston for a pneumatic impact tool
AssigneeIMT Integral Medizintechnik AG
InventorGeorges Mandanis
Life of this patent
Estimating the term…
Abstract
The impact tool is provided with a piston (15) oscillating within a cylinder (10). For selecting, with which piston impact surface the piston (15) impacts on the head (7) of a tool holder (2) and accordingly for the selection whether the impact tool generates forward or rearward strikes, respectively, the cylinder (10) is displaced pneumatically between two positions. The displacement occurs depending on the position of a switch (21). This changing of the impact direction is simple and makes it possible to fix the tool holder in the housing (1) making the impact tool sturdy.
Claims10
A pneumatic impact tool, particularly for surgical use, comprising:
- a housing;
- a tool holder held by said housing and having a first section inside said housing and a second section outside of said housing, said first section being provided at a free end thereof with a head having a first and a second impact surface, and said second section being provided at a free end thereof with a working tool holding means;
- a cylinder provided within said housing;
- a piston provided within said cylinder and having an inner hollow space enclosing said head, said piston being driveable by pneumatic pressure to oscillate within said cylinder, and
- a manually operable switch means provided for selectively slidably displacing said cylinder within said housing and relative to said head from a first position to a second position, and wherein in said first position of said cylinder said oscillating piston impacts only on said first impact surface of said head and in said second position of said cylinder said oscillating piston impacts only on said second impact surface of said head.
Dependencies are inferred from the claim text.