Self-punching t fittings

Claim 1

A SELF-PUNCHING T FITTING OF THE TYPE DESCRIBED ADAPTABLE FOR AFFIXING TO A PIPE WHEREBY FLUID COMMUNICATION MAY BE PROVIDED WITH SAID PIPE, COMPRISING, IN COMBINATION: A TUBULAR BODY MEMBER ADAPTABLE FOR AFFIXING, AS BY WELDING, AT ONE END THEREOF TO THE EXTERIOR SURFACE OF SAID PIPE WHEREBY SAID BODY MEMBER EXTENDS SUBSTANTIALLY RADIALLY THEREFROM, SAID TUBULAR BODY MEMBER HAVING THREADS FORMED SUBSTANTIALLY THE FULL LENGTH OF THE INTERNAL SURFACE THEREOF; A TUBULAR T MEMBER ENGAGING AND INTEGRALLY FORMED WITH SAID BODY MEMBER INTERMEDIATE THE ENDS THEREOF WHEREBY THE INTERIOR OF SAID TUBULAR T MEMBER COMMUNICATES WITH THE INTERIOR OF SAID BODY MEMBER; AND A CYLINDRICAL PUNCHING MEMBER HAVING THREADS FORMED THEREON ADAPTABLE TO SCREWABLY ENGAGE SAID INTERNAL THREADS OF SAID BODY MEMBER, SAID PUNCH MEMBER HAVING A REDUCED CONCENTRIC CYLINDRICAL END PORTION, SAID REDUCED END PORTION TERMINATING IN A PUNCHING FACE, SAID PUNCHING FACE DEFINED BY AT LEAST THREE AND NOT MORE THAN SIX FLAT FACE AREAS, EACH OF SAID FLAT FACE AREAS FORMED AT AN ANGLE WITH RESPECT TO A PLANE DRAWN PERPENDICULAR TO THE AXIS OF SAID PUNCHING MEMBER, SAID FLAT FACE AREAS INTERSECTING EACH OTHER TO FORM A POINT COINCIDING WITH THE AXIS OF SAID CYLINDRICAL PUNCH MEMBER, AND SAID PUNCH MEMBER HAVING MEANS AT THE END OPPOSITE SAID PUNCHING FACE ADAPTABLE TO RECEIVE A TOOL WHEREBY SAID PUNCH MEMBER MAY BE ROTATED IN ONE DIRECTION TO ENGAGE SAID PUNCHING FACE WITH SAID PIPE TO DISPLACE A PORTION OF THE METAL OF SAID PIPE TO FORM A HOLE THEREIN AND WHEREBY SAID PUNCHING MEMBER MAY BE SUBSEQUENTLY ROTATED IN THE OPPOSITE DIRECTION TO DISPLACE SAID PUNCHING MEMBER WITHIN SAID BODY MEMBER AWAY FROM SAID HOLE TO PROVIDE FLUID COMMUNICATION BETWEEN SAID PIPE AND SAID TUBULAR T MEMBER.