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US 2015/0316089 A1Published application
Fastener system comprising an externally threaded bolt and an internally threaded nut for the avoidance of cross-threading of the mating threads during assembly
AssigneeResearch Engineering & Manufacturing, Inc.
InventorAlan Pritchard
Life of this patent
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Abstract
A threaded fastener system, incorporating a bolt and a nut assembly, wherein the bolt has a threaded lead entry point whose pitch and helix angle are of a higher magnitude than that of those on the body/shank of the bolt.
Claims12
A system comprising:
- a shank of a bolt, having an external thread formed to engage a pre-threaded internal thread in a nut member, wherein the external thread of the shank and the internal thread of the nut member have a same thread pitch and a same thread helix angle;
- a lead entry point on the bolt, having a threaded entry point, wherein the threaded entry point has an entry point thread pitch higher in magnitude than the thread pitch of the body/shank and wherein the threaded entry point has an entry point helix angle higher in magnitude than the thread helix angle, of the body/shank of the bolt and
- wherein an outside diameter of the lead entry point being approximately equal to a minor thread diameter of the nut member.
Dependencies are inferred from the claim text.