One-piece self-locking nut

• US 10,184,508 B2
• Filed: 10/20/2015
• Issued: 01/22/2019
• Est. Priority Date: 03/24/2013
• Status: Active Grant

• Current Assignee: Arnold Permanent Nut, LLC
• Original Assignee: Arnold Permanent Nut, LLC
• Inventors: Limatoc, Arnold R.
• Primary Examiner(s): Saether, Flemming
• Application Number:
  US14/918,035
• Publication Number:
  US 20160040708A1
• Time in Patent Office: 1,190 Days
• Field of Search: 411277, 411278, 411285, 411288, 411290
• CPC Class Codes: F16B 39/026 by swaging the nut on the bolt, i.e. by plastically deforming the nut
• CPC Class Codes: F16B 39/34 Locking by deformable inserts or like parts

Abstract

A self-locking nut is formed with a rear nut body with internal threading and a front nut body having circumferentially arranged, crush-locking lips provided on a forward contact face of the front nut body and being spaced from the internal threading of the rear nut body by an internal relief cut for accommodating deformation of the crush-locking lips therein. When the nut is tightened down on an object on a fastener bolt, the crush-locking lips are forced inwardly and deformed on the threaded shaft of the fastener bolt into the space of the internal relief cut in order to form a permanent lock on the fastener bolt. In another preferred embodiment, the self-locking nut has a front “flying saucer” shaped part configured to work like a “jam nut” portion, and a rear “nut body” part having a front indentation space configured to work like an inner relief cut. The two parts are joined together by circumferential welding and flattening of the “flying saucer” part into the inner relief cut space of the “nut body” part while leaving a small gap between the parts.

Claims

1. A self-locking nut comprising:

a front flying saucer shaped part including threads; and

a rear nut body part including threads and having a front indentation space providing an inner relief space, the front flying saucer shaped part and the rear nut body part being joined together by welding and flattening of the flying saucer shaped part into the inner relief space of the rear nut body part such that a front face of the entire front flying saucer shaped part is generally flat while leaving a small gap between a back face of the flying saucer shaped part and a front face of the rear nut body part such that the threads of the front flying saucer shaped part and the threads of the rear nut body part are in-phase prior to installation of the self-locking nut,

wherein responsive to the nut being tightened down on an object on a fastener bolt, the front flying saucer shaped part is forced inwardly and deforms on a threaded shaft of the fastener bolt and into the inner relief space of the rear nut body part in order to form a permanent lock on the fastener bolt.

2. The self-locking nut according to claim 1, responsive to the self-locking nut being threaded on a bolt against an object, the collapsing volume of the flying saucer shaped part into the rear nut body part creates a permanent lock that prevents the self-locking nut from rotating or backing off of the bolt due to vibration.

3. The self-locking nut of claim 1, wherein the flying saucer shaped part has a thickness of about 33.3 percent of a standard nut height.

4. The self-locking nut of claim 1, wherein the flying saucer shaped part is formed symmetrically about a transverse plane with inclined front and rear faces at an actuate angle of about 25.74 degrees.

5. The self-locking nut of claim 1, wherein the rear nut body part has the front indentation space formed with an inclined front face at an angle of about 45 degrees inclined to an inner height of about 27.4 percent of a standard nut height.

6. The self-locking nut of claim 5, wherein responsive to the front flying saucer shaped part and the rear nut body part being joined together by welding and flattening, the small gap is about 5.9 percent of a standard nut height.

7. The self-locking nut of claim 1, wherein the front flying saucer shaped part, the rear nut body, or both include brass, steel, stainless steel, titanium, plastic, nylon, or any combination thereof.

8. The self-locking nut of claim 1, wherein the front flying saucer shaped part includes a first material and the rear nut body includes a second material.

9. The self-locking nut of claim 8, wherein the first material is different than the second material.

10. The self-locking nut of claim 8, wherein the first material is the same as the second material.

11. A self-locking nut comprising:

a front flying saucer shaped part; and

a rear nut body part having a front indentation space providing an inner relief space, the front flying saucer shaped part and the rear nut body part being joined together by welding and flattening of the flying saucer shaped part into the inner relief space of the rear nut body part while leaving a small gap between a back face of the flying saucer shaped part and a front face of the rear nut body part,

wherein responsive to the nut being tightened down on an object on a fastener bolt, the front flying saucer shaped part is forced inwardly and deforms on a threaded shaft of the fastener bolt and into the inner relief space of the rear nut body part in order to form a permanent lock on the fastener bolt, and

wherein the flying saucer shaped part has a thickness of about 33.3 percent of a standard nut height and is formed symmetrically about a transverse plane with inclined front and rear faces at an acute angle of about 25.74 degrees, and the rear nut body part has the indentation space formed with an inclined front face at an angle of about 45 degrees inclined to an inner height of about 27.4 percent of a standard nut height.

12. The self-locking nut according to claim 11, responsive to the front flying saucer shaped part and the rear nut body part being joined and flattened together, the small gap remaining between the flying saucer shaped part and the inner height of the indentation space of the rear nut body part is about 5.9 percent of a standard nut height.

13. The self-locking nut of claim 11, wherein the front flying saucer shaped part, the rear nut body, or both include brass, steel, stainless steel, titanium, plastic, nylon, or any combination thereof.

14. The self-locking nut of claim 11, wherein the front flying saucer shaped part includes a first material and the rear nut body includes a second material.

15. The self-locking nut of claim 14, wherein the first material is different than the second material.

16. The self-locking nut of claim 14, wherein the first material is the same as the second material.