A method and apparatus for drilling a curved bore are disclosed, wherein the apparatus includes a handle (20) and a removable cartridge (174) in which cutting bits (240) are disposed to produce the bore. The handle includes a trigger (66), (66'), or (66"), which the user squeezes toward a grip (24) of...http://www.google.de/patents/US5509918?utm_source=gb-gplus-sharePatent US5509918 - Method and apparatus for drilling a curved bore in an object
