Patent ID: 6146074
Filing Date: 2000-11-14
Classification: F16B

Abstract:
A structure for protecting a nut from loosening, the structure comprising:a washer for accompanying the nut when the nut is threaded on a bolt with a prescribed torque so as to fasten an article, the washer comprising an annular washer body having a central aperture for insertion of a shank of the bolt, the washer body having an upper face and a lower face, at least one of the faces being gently slanted at an inclination `.alpha.` relative to the other so as to provide a seat face;wherein the inclination .alpha. is such that, when the nut is threaded on the bolt with the prescribed torque, the lower face of the nut is in forced whole surface contact with the upper face of the washer, the lower face of the washer is in forced whole surface contact with an upper face of the article, and,concurrently therewith, a substantially vertical pressure is imparted to the upper face of the article;wherein the inclination `.alpha.` is about 2 to about