Finishing washer
AssigneeBuell Industries, Inc.
InventorFrancis C. Peterson
Life of this patent
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Abstract
A finishing washer 10 is presented. Finishing washer 10 comprises a frustoconical perforated disk 15 having a plurality of tabs 20 extending inward from disk 15. When applied to a screw 50, finishing washer 10 provides a wider bearing area to the screw head 52, to establish a wear point between screw 50 and the material finishing washer 10 will bear on. In this manner, the material is not damaged by friction or pressure when screw 50 is tightened. Further, stripping of screws is lessened due to the use of finishing washer 10 of this invention.
Claims9
A screw assembly comprising a threaded screw and a finishing washer disposed between the uppermost threads of said screw and a frustoconical head of said screw, said finishing washer comprising a frustoconical perforated disk having a continuous horizontally oriented upper edge and a plurality of tabs extending inwardly only from said disk, said tabs defining openings in the side of said disk, wherein said tabs are shaped such that the internal sides of said frustoconical perforated disk are not contacted by the head of said screw.
A screw assembly comprising a threaded screw having a substantially frustoconical head and a finishing washer disposed between the uppermost threads of said screw and the head of said screw, said finishing washer comprising a frustoconical perforated disk having a substantially continuous horizontal upper edge and a substantially vertical lower edge, said finishing washer further comprising about two to about five tabs extending inwardly only from said frustoconical perforated disk, said tabs defining openings in the side of said disk, wherein said tabs are shaped such that the internal sides of said frutoconical perforated disk are not contacted by the head of said screw.
Dependencies are inferred from the claim text.