Advanced nut and bolt

Patent metadata

Field	Value
Publication number	US-10655669-B2
Application number	US-201916298843-A
Country	US
Kind code	B2
Filing date	Mar 11, 2019
Priority date	Nov 26, 2013
Publication date	May 19, 2020
Grant date	May 19, 2020

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 inner periphery extending from the first end to the second end,
an outer periphery extending from the first end to the second end,
a thickness extending from the inner periphery to the outer periphery,
an internal nut thread extending from the first end to the second end,
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,
a hardness, 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,
wherein the hardness of the nut gradationally changes between the first and second ends but the first hardness is constant about the thickness in the first hardness area, the second hardness is constant about the thickness in the second hardness area, and the third hardness is constant about the thickness in the third hardness area, and
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.

2. The nut of claim 1 , wherein the hardness increases gradually from the first end to the second end.

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

4. 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; and
a nut including a first end, a second end opposite the first end of the nut, internal nut thread extending between the first and second ends of the nut and adapted to engage threadedly the bolt thread of the bolt, and wherein the nut includes
an inner periphery extending from the first end of the nut to the second end of the nut,
an outer periphery extending from the first end of the nut to the second end of the nut,
a thickness extending from the inner periphery to the outer periphery,
a first hardness area extending between the first end of the nut and a first boundary located intermediate the first and second ends of the nut, a second hardness area extending from the first boundary to a second boundary located distal from the first boundary and towards the second end of the nut, and a third hardness area extending from the second boundary to the second end of the nut,
a hardness, 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,
wherein the hardness changes gradationally between the first and second ends of the nut but the first hardness is constant about the thickness in the first hardness area, the second hardness is constant about the thickness in the second hardness area, and the third hardness is constant about the thickness in the third hardness area, and
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 fastener of claim 4 , wherein the nut includes a flange located at the second end thereof.

6. The fastener of claim 4 , 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

• F16B37/00

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

• F16B39/284 Primary

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