Fastening device for cladding panel

Claim 1

THE COMBINATION OF A SUBSTANTIALLY VERTICAL, CLAD BUILDING WALL CONSISTING OF CLADDING PANELS FIXED IN GENERALLY PARALLEL SPACED RELATIONSHIP WITH RESPECT TO THE CLAD SURFACE OF SAID WALL, SAID WALL AND SAID PANELS HAVING A MULTIPLICITY OF CONNECTING MEANS INTERPOSED THEREBETWEEN CONSISTING OF PRIMARY HOOKS FORMED OF RESILIENT SHEET METAL HAVING SUBSTANTIALLY FLAT SHANKS, SAID FLAT SHANKS HAVING A LONGITUDINAL AXIS WHICH IS GENERALLY VERTICAL, SAID PRIMARY HOOKS FIXED TO SAID WALL BY NAILING MEANS DRIVEN THROUGH SAID SHANKS AND INTO SAID WALL, THE SAID PRIMARY HOOKS HAVING RETURN CURVES EMANATING FROM SAID SHANKS AND TERMINATING IN RESPECTIVE FREE LEGS TO DESCRIBE GENERALLY U CONFIGURATIONS WITH RESPECT TO SAID SHANKS, SAID PRIMARY HOOKS HAVING RESPECTIVELY FLANGES ON THE SURFACES OF SAID SHANKS CONTIGUOUS WITH THE RESPECTIVE CONCAVE SURFACES OF SAID U''S, SAID FREE LEGS OF SAID PRIMARY HOOKS IN NON-CONTACTING RELATIONSHIP TO SAID WALL, SAID FREE LEGS OF SAID PRIMARY HOOKS RESPECTIVELY TERMINATING IN SUBSTANTIALLY STRAIGHT EDGES, GENERALLY PARALLEL TO SAID FLANGE, BOTH SAID FLANGE AND SAID STRAIGHT EDGES GENERALY HORIZONTAL, SECONDARY HOOKS IN HOOKED RELATIONSHIP WITH SAID PRIMARY HOOKS, SAID SECONDARY HOOKS COMPOSED OF SHEET METAL HAVING, RESPECTIVELY, SHANKS, SAID SECONDARY HOOKS FIXED TO THE INTERIOR SURFACE OF SAID PANELS BY WELDING MEANS, SAID SECONDARY HOOKS HAVING RETURN CURVES EMANATING FROM THEIR SHANKS RESPECTIVELY AND TERMINATING IN RESPECTIVE FREE LEGS TO DESCRIBE INVERTED U''S WITH RESPECT TO SAID PRIMARY HOOKS, SAID FREE LEGS RESPECTIVELY OF SAID SECONDARY HOOKS HAVING ON THEIR RESPECTIVE SURFACES, WHICH ARE CONTIGUOUS WITH THE CONVEX SURFACE OF SAID INVERTED U''S THEREOF, LOCKING LUGS ENGAGING SAID FLANGES ON SAID PRIMARY HOOKS, THE LOOP OF THE INVERTED U OF SAID SECONDARY HOOKS RESTING RESPECTIVELY IN SUPPORTED CONTACT WITH THEIR CONCAVE SURFACES ON, AND CARRIED BY, SAID SUBSTANTIALLY STRAIGHT EDGE OF SAID FREE LEGS OF SAID PRIMARY HOOKS, THE THUS ENGAGED RELATIONSHIP OF SAID LOCKING LUGS AND SAID FLANGE RESTRAINING VERTICAL DISPLACEMENT OF SAID PANEL.