Replaceable ladder rung

Claim 1

A RUNG ASSEMBLY DESIGNED TO REPLACE A DEFECTIVE RUNG OF A LADDER WHICH COMPRISES A CYLINDRICAL RUNG CONTAINING AT LEAST IN ONE END THEREOF A FIRST DIAGONALLY CUTAWAY SUBSTANTIALLY HOLLOW CYLINDRICAL ELEMENT, A SECOND DIAGONALLY CUT-AWAY SUBSTANTIALLY HOLLOW CYLINDRICAL ELEMENT WHICH EXTENDS WITHOUT SAID RUNG TO A DISTANCE EQUIVALENT TO THE WIDTH OF THE RAIL OF A LADDER WITH WHICH IT WILL BE USED, SAID FIRST AND SAID SECOND DIAGONALLY CUT-AWAY CYLINDRICAL ELEMENTS BEING POSITIONED WITH RESPECT TO EACH OTHER SO THAT EACH ELEMENT COMPRISES ONE END OF A TWO-PIECE SUBSTANTIALLY UNIFORM CYLINDER, A COIL SPRING UNDER COMPRESSION POSITIONED BETWEEN SAID ELEMENTS AND WITHIN THE HOLLOW PORTIONS THEREOF, MEANS FOR MOVING THE RESPECTIVE ELEMENTS TOWARD EACH OTHER ALONG THE LONGITUDINAL AXIS THEREOF, WHEREBY SAID ELEMENTS WILL TEND TO MOVE IN A VERTICAL PLANE WITH RESPECT TO EACH OTHER AND THUS SECURE SUFFICIENT CONTACT WITHIN SAID CYLINDRICAL RUNG.