Fastener assembly for use in vibratory material handling apparatus

Claim 1

IN A VIBRATORY MATERIAL HANDLING APPARATUS COMPRISING A DECK PLATE OVER WHICH MATERIAL IS PASSED AND A TRANSVERSE FRAME MEMBER SECURED TO THE UNDERSURFACE THEREOF THROUGH WHICH VIBRATORY MOTION IS TRANSMITTED TO THE DECK PLATE, THE INVENTION COMPRISING A FASTENING DEVICE FOR CONNECTING THE PLATE TO THE FRAME MEMBER, COMPRISING, (A) A BOLT PASSING THROUGH THE PLATE AND FRAME WITH ITS HEAD CONFINED AGAINST ROTATION IN THE FRAME AND WITH ITS THREADED SHANK PROJECTING BEYOND THE TOP OF THE PLATE, (B) DISC SPRINGS ON THE PROJECTING END OF THE BOLT, (C) A WASHER OVER THE SPRINGSHAVING A CAVITY ON ITS UNDERSURFACE IN WHICH THE SPRINGS ARE CONFINED AND COMPRESSED AGAINST THE PLATE, THE WASHER HAVING A DEPENDING PORTION OUTSIDE THE SPRINGS BEARING AGAINST THE PLATE OF LIMITING THE COMPRESSION UNDER WHICH THE SPRINGS ARE PLACED, AND (D) A NUT ON THE THREADED END OF THE BOLT ADAPTED TO JAM THE DEPENDING PORTION OF THE WASHER AGAINST THE PLATE AND TO COMPRESS THE SPRINGS AND HOLD THE FRAME MEMBER TIGHTLY CLAMPED TO THE PLATE.