Bolt with extension to prevent thread misalignment
AssigneeMeidoh Co., Ltd.
InventorTakashi Kato
Life of this patent
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Abstract
A bolt is provided in the present invention. When said bolt is screwed in a nut, said bolt is guided by engaging the spiral guide groove of said guide boss with the thread of the nut to prevent the encroaching, the seizure, or the racing between the bolt and the nut.
Claims6
A bolt which is screwed into a female screw, said bolt having an axle with a thread and a guide boss extending from the front end of said axle wherein said thread has a root and said guide boss has an external diameter smaller than an internal diameter of a female screw in which said bolt is screwed and a spiral guide groove is formed on said guide boss, and said spiral guide groove connects to said thread of said axle, said spiral groove has the same pitch as a pitch of said thread of said axle, and the root of said spiral guide groove is situated at a deeper position than the root of said thread except for both end parts of said spiral guide groove.
Dependencies are inferred from the claim text.