Advanced Nut and Bolt

Patent metadata

Field	Value
Publication number	US-2019203758-A1
Application number	US-201916298843-A
Country	US
Kind code	A1
Filing date	Mar 11, 2019
Priority date	Nov 26, 2013
Publication date	Jul 4, 2019
Grant date	—

Abstract

A fastener including a bolt having an elongated shank having a first end, a second end opposite the first end, and a threaded portion having an external bolt thread, the bolt thread including a bolt pitch. The fastener includes a nut having a first end, a second end opposite the first end of the nut, and an internal nut thread extending between the first and second ends of the nut and adapted to engage threadedly the bolt thread of the bolt. The nut thread includes a nut pitch and a hardness that changes gradationally between the first and second ends of the nut. The bolt pitch of the bolt thread of the bolt is mismatched with the nut pitch of the nut thread of the nut.

First claim

What is claimed is:

1 . A nut, comprising:
a first end, a second end opposite the first end, an internal nut thread extending from the first end to the second end, and a hardness, wherein the hardness of the nut gradationally changes between the first and second ends but remains constant about a thickness of the nut in a radial direction thereof.

2 . The nut of claim 1 , wherein the nut includes a first hardness area extending between the first end and a first boundary located intermediate the first and second ends, a second hardness area extending from the first boundary to a second boundary located distal from the first boundary and towards the second end, and a third hardness area extending from the second boundary to the second end.

3 . The nut of claim 2 , wherein the hardness within the first hardness area includes a first hardness, the hardness within the second hardness area includes a second hardness, and the hardness within the third hardness area includes a third hardness.

4 . The nut of claim 3 , wherein the first hardness is selected from a range of approximately Rb 20 to approximately Rb 100, the second hardness is selected from a range of approximately Rb 20 to approximately Rc 60, and the third hardness is selected from a range of approximately Rc 20 to approximately Rc 60.

5 . The nut of claim 4 , wherein the hardness increases gradually from the first end to the second end.

6 . The nut of claim 1 , further comprising a flange located at the second end thereof.

7 . A fastener, comprising:
a bolt including an elongated shank having a first end, a second end opposite the first end, and a threaded portion having an external bolt thread, wherein the bolt thread includes a bolt pitch; and a nut including a first end, a second end opposite the first end of the nut, an internal nut thread extending between the first and second ends of the nut and adapted to engage threadedly the bolt thread of the bolt, wherein the nut thread includes a nut pitch, and wherein the nut includes a hardness that changes gradationally between the first and second ends of the nut but remains constant about a thickness of the nut in a radial direction thereof, wherein the bolt pitch of the bolt thread of the bolt is mismatched with the nut pitch of the nut thread of the nut, wherein the nut pitch of the nut thread of the nut is shorter than the bolt pitch of the bolt thread of the bolt, and wherein when the nut thread of the nut engages the bolt thread of the bolt, an initial contact and engagement between the nut thread and the bolt thread is located at a pitch of the nut pitch that is closest to the first end of the nut.

8 . The fastener of claim 7 , wherein the nut includes a flange located at the second end thereof.

9 . The fastener of claim 7 , wherein the nut includes a first hardness area extending between the first end and a first boundary located intermediate the first and second ends, a second hardness area extending from the first boundary to a second boundary located distal from the from the first boundary and towards the second end, and a third hardness area extending from the second boundary to the second end.

10 . The fastener of claim 9 , wherein the hardness within the first hardness area includes a first hardness, the hardness within the second hardness area includes a second hardness, and the hardness within the third hardness area includes a third hardness.

11 . The fastener of claim 10 , wherein the first hardness is selected from a range of approximately Rb 20 to approximately Rb 100 the second hardness is selected from a range of approximately Rb 20 to approximately Rc 60, and the third hardness is selected from a range of approximately Rc 20 to approximately Rc 100.

12 . The fastener of claim 11 , wherein the hardness increases gradually from the first end to the second end.

Assignees

• Arconic Inc

Inventors

• Busby Donald C
• Franklin Richard
• Wollard James L

Classifications

• F16B39/30 Primary

  Locking exclusively by special shape of the screw-thread · CPC title

• F16B35/00

  Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws ({F16B33/008 takes precedence; joining sheets or plates using screws with two separate threads F16B5/0275; using screws with adjustment sleeves F16B5/0283}; thread cutting screws F16B25/00) · CPC title

• F16B37/00

  Nuts or like thread-engaging members {(specially shaped for rotations by a tool F16B23/00)} · CPC title

• F16B39/284 Primary

  Locking by means of elastic deformation ({F16B39/2825, F16B39/36,} F16B39/38 take precedence) · CPC title