US 11,754,112 B2Granted

Locking thread fasteners

OwnerEmanuele Salvucciinventor

Life of this patent

Estimating the term…

Loading patent…

Abstract

The present specification discloses a locking fastener that includes a first threaded fastener axially positioned within an axial through hole of a second threaded fastener, and captured therein by a rotating joint that permits rotation of the first threaded fastener and the second threaded fastener relative to one another about a common thread axis. In one or more embodiments, the first threaded fastener thread handedness is opposite to the second threaded fastener thread handedness. Additionally disclosed, is a screwdriver tool configured to simultaneously engage and oppositely rotate the first threaded fastener and the second threaded fastener into a mating component having a first mating thread and a second mating thread configured to receive the first threaded fastener and the second threaded fastener, respectively, driven at the same axial advance distance for each turn. Once tightened, the present locking fastener resists loosening and provides a tamper-resistant hold.

Claims20

Dependent claims

A fastener comprising:

a first fastener component having a first head portion, a first cylindrical body portion extending from the first head portion along a first cylindrical axis, a first thread formed on the first cylindrical body portion about the first cylindrical axis, the first thread having a first thread handedness;
a second fastener component having a second head portion, a second cylindrical body portion extending from the second head portion along a second cylindrical axis, a through hole formed through the second head portion and the second cylindrical body portion along the second cylindrical axis, a second thread formed on the second cylindrical body portion about the second cylindrical axis, the second thread having a second thread handedness opposite the first thread handedness, at least a part of the first cylindrical body portion of the first fastener being positioned within the through hole such that the first threads are situated within the through hole and the first cylindrical axis is substantially coaxial with the second cylindrical axis to form an axis of rotation;
and
a rotating joint that captures the part of the first cylindrical body portion of the first fastener within the through hole of the second fastener component to limit substantial prohibit axial movement between the first fastener component and the second fastener component along the axis of rotation and permits axial rotation between the first fastener component and the second fastener component about the axis of rotation;
wherein the first fastener component is configured to be rotated in a first rotational direction about the axis of rotation and simultaneously the second fastener component is configured to be rotated in a second rotational direction about the axis of rotation, the second rotational direction being opposite the first rotational direction.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/000,816Filed 9 Jun 2021 · us provisional application
Priority: 9 Jun 2020
Published: US 2023/0193944 A122 Jun 2023
Granted: 12 Sep 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

F16B 41/005
Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins: measures against unauthorised…
B25B 13/485
For special purposes: for theft-proof screws, bolts or nuts
B25B 13/488
For special purposes: for connections where two parts must be turned in opposite directions by one tool
B25B 13/50
For special purposes: for operating on work of special profile, e.g. pipes