Universal joint

Claim 1

A UNIVERSAL JOINT COMPRISING A CROSS BLOCK HAVING A PAIR OF MUTUALLY PERPENDICULAR BORES FORMED THERETHROUGH OPENING OUTWARDLY OF SAID BLOCK AT OPPOSITE ENDS THROUGH PAIRS OF PARALLEL OPPOSITE SIDE FACES DISPOSED AT RIGHT ANGLES RELATIVE TO EACH OTHER, A PAIR OF YOKES EACH INCLUDING A PAIR OF GENERALLY PARALLEL ARMS HAVING ALIGNED THREADED BORES FORMED THERETHROUGH LARGER IN DIAMETER THAN SAID MUTUALLY PERPENDICULAR BORES AND WHOSE ADJACENT ENDS OPEN THROUGH GENERALLY PARALLEL INNER FACES, SAID YOKES EACH BEING DISPOSED WITH ITS ARMS EMBRACING SAID BLOCK AND GENERALLY PARALLELING THE CORRESPONDING PAIR OF SAID SIDES AND ITS THREADED BORES ALIGNED WITH THE OPPOSITE ENDS OF THE CORRESPONDING ONE OF SAID MUTUALLY PERPENDICULAR BORES, AND FORU PIVOT PINS EACH INCLUDING A SMALL DIAMETER JOURNAL END PORTION AND A LARGER DIAMETER THREADED END PORTION THREADEDLY ENGAGED IN SAID THREADED BORES WITH SAID JOURNAL END PORTIONS EXTENDING INTO AND ROTATABLY RECEIVED IN THE ADJACENT END OF THE CORRESPONDING BORE, SAID PIVOT PINS EACH INCLUDING A GENERALLY RADIALLY OUTWARDLY PROJECTING SHOULDER BETWEEN SAID END PORTIONS, WHEREIN SAID MUTUALLY PERPENDICULAR BORES BEING LARGER IN DIAMETER THAN SAID JOURNAL END PORTIONS, CYLINDRICAL BEARING MEANS DISPOSED IN SAID MUTUALLY PERPENDICULAR BORES ROTATABLY JOURNALING SAID JOURNAL END PORTIONS, A DISHED THRUST WASHER SNUGLY DISPOSED ON WAHC OF SAID JOURNNAL END PORTIONS COMPRESSIVELY ENGAGED BETWEEN THE CORRESPONDING SIDE FACE OF SAID BLOCK AND THE CONFRONTING FACE OF THE CORRESPONDING SHOULDER AND INNER FACE, THE OUTER ENDS OF SAID CYLINDRICAL BEARING MEANS TERMINATING A SPACE DISTANCE INWARDLY OF THE CORRESPONDING OPPOSITE ENDS OF SAID MUTUALLY PERPENDICULAR BORES, RESILIENT ANNULAR SEALING WASHERS DISPOSED ABOUT EACH OF SAID JOURNAL END PORTIONS INWARDLY OF THE CORRESPONDING ONE OF SAID THRUST WASHERS, THE OPPOSITE ENDS OF SAID MUTUALLY PERPENDICULAR BORES INCLUDING COUNTERBORES IN WHICH SAID SEALING WASHERS ARE COMPRESSIVELY SEATED, SAID MUTUALLY PERPENDICULAR BORES SPACED INWARDLY FROM SAID COUNTERBORES EACH INCLUDING A REDUCED DIAMETER PORTION DEFINED BY A PAIR OF ANNULAR SHOULDERS AT ITS OPOSITE ENDS DEFINING INNER ABUTMENTS FOR SAID CYLINDRICAL BEARING MEANS.