Portable well-driving rig

Claim 1

A PORTABLE WELL-DRIVING RIG FOR DRIVING A LENGTH OF PIPE OR THE LIKE INTO THE GROUND WHICH COMPRISES AN OPENENDED CYLINDER, SAID CYLINDER HAVING A PORTION ADJACENT THE LOWER END THEREOF CUT AWAY, MEANS ADJACENT THE LOWER END OF SAID CUT-AWAY PORTION AND ADAPTED TO SURROUND THE LENGTH OF PIPE, MEANS ADJACENT THE UPPER END OF SAID CUTAWAY PORTION PROVIDING A RADIALLY INWARDLY EXTENDING FLANGE ADAPTED TO ENGAGE THE FLANGE OF CAP PROVIDED ON THE UPPER END OF THE PIPE THEREBY RESTRAINING THE CYLINDER AGAINST DOWNWARD MOVEMENT, A PLUNGER ADAPTED TO BE RECIPROCATED IN SAID CYLINDER, SAID CYLINDER HAVING A SLOT EXTENDING VERTICALLY THERETHROUGH, A LUG ON SAID PLUNGER EXTENDING INTO SAID SLOT, AN ENDLESS DRIVE MEMBER SUPPORTED ON SAID CYLINDER WITH A REACH THEREOF EXTENDING ADJACENT SAID SLOT, A MEANS ON SAID CYLINDER FOR DRIVING SAID ENDLESS DRIVE MEMBER A LUG ON SAID ENDLESS DRIVE MEMBER ADAPTED TO ENGAGE THE LUG ON SAID PLUNGER, AND ELEVATE THE PLUNGER AND THEREAFTER TO MOVE PAST THE LUG ON SAID PLUNGER TO RELEASE THE PLUNGER FOR VERTICAL DOWNWARD MOVEMENT UNDER THE ACTION OF GRAVITY INTO CONTACT WITH THE CAM MEMBER ON SAID PIPE.