Arrangement for jointing pile sections

Claim 1

IN A SECTIONAL REINFORCED CONCRETE PILE CONSTRUCTION INCLUDING A PLURALITY OF END-TO-END ABUTTING CAST CONCRETE PILE SECTIONS EACH HAVING LONGITUDINALLY-EXTENDING REINFORCING RODS THEREIN, THE ADJUSTMENT ABUTTING ENDS OF ADJACENT PILE SECTIONS HAVING SIMILAR FLAT FACE STRUCTURES RESPECTIVELY LOCATED IN PLANES AT RIGHT ANGLES TO THE LONGITUDINAL AXES OF SAID ADJACCENT SECTIONS, WHICH AXES ARE IN ALIGNMENT WITH EACH OTHER, THE REINFORCING RODS IN SAID ADJACENT SECTIONS RESPECTIVELY EXTENDING TO THE ADJACENT ENDS THEREOF, MEANS INTERCONNECTING SAID ABUTTING ADJACENT ENDS AND THE ENDS OF THE REINFORCING RODS THEREAT OF BOTH ADJACENT SECTIONS PROVIDING A STRUCTURE HAVING THE EQUIVALENT OF A UNITARY CONCRETE PILE PROVIDED WITH THROUGH-EXTENDING METAL REINFORCING RODS, SAID INTERCONNECTING MEANS INCLUDING A THREADED NUT WELDED TO THE END PORTIONS OF THE LONGITUDINALLY EXTENDING METAL REINFORCING RODS AT EACH OF SAID ADJACENT ENDS AND LOCATED WITH ITS OUTER FACE IN SAID PLATE AT RIGHT ANGLES TO THE AXIS OF THE PILE SECTION, AND SAID INTERCONNECTING MEANS ALSO INCLUDING AN EXTERNALLY THREADED MEMBER THREADED INTO THE NUTS OF SAID ADJACENT ENDS OF ADJACENT SECTIONS JOINING THE FLAT END FACES OF SAID ADJACENT END TIGHTLY TOGETHER IN ENDTO-END ALIGNMENT AND THEREBY PROVIDING A COHERENT UNITY IN WHICH THE LONGITUDINALLY EXTENDING REINFORCING RODS OF SAID ADJACENT SECTIONS ARE RIGIDLY INTERCONNECTED BY THE RENSION APPLIED THERETO BY SAID EXTERNALLY THREADED MEMBER.