Drilling machine with a fluid pressure feed motor

Claim 1

A DRILLING MACHINE COMPRISING A SUPPORT, A SPINDLE MEMBER ROTATABLE AND LONGITUDINALLY SLIDABLE IN SAID SUPPORT, A FIRST MEANS OPERATIVELY ASSOCIATED WITH THE SPINDLE MEMBER FOR IMPARTING ROTATION TO THE SPINDLE MEMBER ON ITS LONG AXIS, ONE END OF THE SPINDLE MEMBER BEING ADAPTED TO MOUNT A DRILL AXIALLY THEREOF, A COLLAR FIXED AROUND THE SPINDLE MEMBER AND HAVING A HUB PORTION THEREOF IN ENGAGEMENT WITH THE SPINDLE MEMBER, A CYLINDER MOUNTED ON THE SUPPORT AND EXTENDING PARALLEL TO THE SPINDLE MEMBER, THE WALL OF THE CYLINDER HAVING A SLOT FORMED THEREIN, A PISTON MEMBER IN THE CYLINDER AND HAVING A CIRCUMFERENTIAL GROOVE THEREAROUND, THE COLLAR EXTENDING THROUGH SAID SLOT AND HAVING A RIM PORTION THEREOF IN ENGAGEMENT WITH THE GROOVE IN SAID PISTON MEMBER WHEREBY MOVEMENT OF THE PISTON MEMBER AXIALLY IN THE CYLINDER WILL IMPART AXIAL MOVEMENT TO THE SPINDLE MEMBER, SAID SPINDLE MEMBER BEING ROTATABLE WITH RESPECT TO THE COLLAR, FLUID PASSAGE MEANS COMMUNICATING WITH THE CYLINDER FOR INTRODUCING FLUID PRESSURE BEHIND THE PISTON MEMBER TO MOVE THE PISTON MEMBER IN THE DIRECTION OF SAID ONE END OF THE SPINDLE MEMBER, AND FURTHER MEANS OPERATIVELY ASSOCIATED WITH THE SUPPORT AND WITH THE PISTON MEMBER TO URGE THE PISTON MEMBER IN AN OPPOSITE DIRECTION.