Torpedo

Claim 1

A TOPEDO FOR INSTALLING UNDERGROUND FLUID SPRINKLING SYSTEMS AND THE LIKE IN A LAWN COMPRISING A VERTICALLY EXTENDING BLADE HAVING A LEADING KNIFE EDGE ADAPTED TO CUT THROUGH SUCH LAWN, AN ELONGATED CYLINDRICAL BODY EXTENDING HORIZONTALLY AND SECURED TO THE BOTTOM OF SAID BLADE, A LONGITUDINALLY EXTENDING FLUID PASSAGE IN SAID BODY, SAID PASSGE TERMINATING IN A LEADING ENLARGED INTERNALLY THREADED RECESS ADJACENT THE LEADING END THREOF, REMOVABLE NOSE PIECE HAVING AN ELONGATED THREADED SHANK FITTED IN SAID INTERNALLY THREADED RECESS IN SAID BODY, EXTERNAL LONGITUDINALLY EXTENDING GROOVES RUNNING THE ENTIRE LENGTH OF SAID SHANK AND TERMINATING IN RADIALLY OUTWARDLY EXTENDING GROOVES IN SAID NOSE PIECE, SAID LONGITUDINALLY AND RADIALLY EXTENDING GROOVES BEING IN FLUID COMMUNICATION WITH SAID LONGITUDINALLY EXTENDING FLUID PASSAGE IN SAID BODY, SAID RADIALLY EXTENDING GROOVES EXTENDING TO THE EXTERIOR SURFACE OF SID TORPEDO, AND MEANS PROVIDED ON SAID BODY FOR SECURING AN ELONGATED FLUID PIPE OR THE LIKE THERETO IN FLUID COMMUNICATION WITH SAID FLUID PASSAGE, WHEREBY WTER MAY BE FORCED THROUGH SAID PIPE, THROUGH SAID TORPEDO BODY, AND OUTWARDLY THROUGH THE PASSAGE IN SAID NOSE PIECE TO LUBRICATE SAID TORPEDO AS IT IS DRIVEN THROUGH THE GROUND.