Patent ID: 6305890
Filing Date: 2001-10-23
Classification: B60B,F16B,Y10S

Abstract:
A nut covering device for covering a nut member screwed onto a bolt, in order to prevent rotation of said nut member, comprising:a cover assembly, comprising: an inner cover, fitting around, in a rotatable manner, at least a portion of said nut member; an outer cover, fitting around said inner cover in a manner allowing for relative rotation and covering an outer perimeter of said nut member; and a first constraining mechanism, which constrains so that there is no relative motion of said outer cover with respect to said inner cover in an axis direction;a second constraining mechanism, which constrains so that there is no relative motion of said inner cover with respect to said nut member in said axis direction;a third constraining mechanism, which constrains so that there is no relative motion of said outer cover with respect to said nut member in said axis direction in at least a direction of removal;said nut covering device being constructed so that said cover assembly is detachable from said nut member by releasing said second and third constraining mechanisms by matching a circumferential phase of said inner cover and said outer cover with respect to said nut member with a pre-determined specified phase.