# US 2019/0316626 A1 · One-piece self-locking nut > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0316626 A1 - Document ID: US20190316626A1 - Status: Published application - Kind: A1 - Application number: 16/401,579 - Filed: 2019-05-02 - Published: 2019-10-17 - Earliest claimed: 2013-03-24 - Assignees: Crushlock, Inc. - Applicants: Crushlock, Inc. - Inventors: Arnold R. Limatoc - Web page: https://patentgrep.com/patent/US20190316626A1 ## CPC - F16B 39/34: Locking by deformable inserts or like parts - F16B 39/026: {by swaging the nut on the bolt, i.e. by plastically deforming the nut} - F16B 39/122: {foreseen with mating surfaces inclined, i.e. not normal, to the bolt axis} - F16B 39/284: Locking by means of elastic deformation ({F16B39/2825, F16B39/36,} F16B39/38 take precedence) - F16B 39/286: caused by saw cuts - F16B: DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING (couplings for transmitting rotation F16D) ## Abstract A self-locking nut includes a main-nut body and a deformable-nut body. The main-nut body has a recess leading into an interior threaded bore forming x turns of an internal thread therein. The deformable-nut body has an outer flange and an interior threaded bore forming y turns of an internal thread therein. The outer flange of the deformable-nut body is fixed to the main-nut body such that a relief space is formed between the deformable-nut body and the recess. A ratio of x:y is about 2:1. ## Claims ### Claim 1 A self-locking nut comprising: a main-nut body having a recess leading into an interior threaded bore forming more than three turns of an internal thread therein; and a deformable-nut body having an outer flange and an interior threaded bore forming less than three turns of an internal thread therein, wherein the outer flange of the deformable-nut body is fixed to the main-nut body such that a relief space is formed between the deformable-nut body and the recess. ### Claim 2 (depends on 1) The self-locking nut of claim 1, wherein the outer flange of the deformable-nut body is fixed to the main-nut body such that a generally cylindrical portion of the relief space is established between the interior threaded bore of the deformable-nut body and the interior threaded bore of the main-nut body, and wherein the generally cylindrical portion of the relief space has a first maximum height prior to installation of the self-locking nut on a threaded bolt shaft and wherein the generally cylindrical portion of the relief space has a second maximum height after installation of the self-locking nut on the threaded bolt shaft, the second maximum height being less than the first maximum height. ### Claim 3 (canceled) ### Claim 4 (depends on 2) The self-locking nut of claim 2, wherein second maximum height is less than fifty percent of the first maximum height. ### Claim 5 (depends on 1) The self-locking nut of claim 1, wherein the relief space provides an area for the deformable-nut body to deform into during installation of the self-locking nut on a threaded bolt shaft. ### Claim at position 6 6-12. (canceled) ### Claim 13 (depends on 1) The self-locking nut of claim 1, wherein the outer flange of the deformable-nut body is fixed to the main-nut body such that the deformable-nut body cannot rotate relative to the main-nut body. ### Claim 14 (depends on 1) The self-locking nut of claim 1, wherein the recess extends from a front surface of the main-nut body towards an opposing back surface of the main-nut body, and wherein the recess is an inwardly tapered recess. ### Claim at position 9 15-16. (canceled) ### Claim 17 (depends on 1) The self-locking nut of claim 1, wherein the interior threaded bore of the main-nut body forms between about 3.25 and about 6 turns of the internal thread and the interior threaded bore of the deformable-nut body forms between about 0.5 and about 2.75 turns of the internal thread. ### Claim 18 (canceled) ### Claim 19 (depends on 1) The self-locking nut of claim 1, wherein the outer flange of the deformable-nut body is relatively thinner than the rest of the deformable-nut body such that the outer flange deforms during installation of the self-locking nut on a threaded bolt shaft. ### Claim 20 (depends on 19) The self-locking nut of claim 19, wherein the self-locking nut is made from a first material having a first elastic modulus and the threaded bolt shaft is made from a second material having a second elastic modulus that is greater than the first elastic modulus. ### Claim 21 (canceled) ### Claim 22 A self-locking nut comprising: a main-nut body having (i) a front surface, (ii) an opposing back surface, (iii) an outer surface configured to be engaged by a tool to rotate the self-locking nut about a threaded bolt shaft thereby causing the main-nut body to move axially in a first direction towards an object, (iv) an interior threaded bore forming a plurality of turns of an internal thread therein, and (v) a recess in the front surface extending into the main-nut body; and a deformable-nut body having (i) a front surface configured to engage the object thereby limiting axial movement of the deformable-nut body, (ii) an opposing back surface, (iii) an outer surface, (iv) an interior threaded bore forming at least a portion of a turn of an internal thread therein, and (v) an outer flange; wherein the outer flange of the deformable-nut body is attached to the front surface of the main-nut body such that a relief space is formed between a portion of the opposing back surface of the deformable-nut body and the recess, the relief space providing an area for the deformable-nut body to deform into during installation of the self-locking nut on the threaded bolt shaft. ### Claim at position 16 23-28. (canceled) ### Claim 29 (depends on 22) The self-locking nut of claim 22, wherein the internal thread of the main-nut body has the same pitch as the internal thread of the deformable-nut body. ### Claim 30 (depends on 22) The self-locking nut of claim 22, wherein the front surface of the main-nut body is welded to the outer flange of the deformable-nut body. ### Claim at position 19 31-57. (canceled) ### Claim 58 A self-locking nut comprising: a main-nut body having a recess leading into an interior threaded bore forming x turns of an internal thread therein; and a deformable-nut body having an outer flange and an interior threaded bore forming y turns of an internal thread therein, wherein the outer flange of the deformable-nut body is fixed to the main-nut body such that a relief space is formed between the deformable-nut body and the recess, and wherein x is greater than y. ### Claim 59 (depends on 58) The self-locking nut of claim 58, wherein a ratio of x:y is about 2:1. ### Claim 60 (depends on 58) The self-locking nut of claim 58, wherein a ratio of x:y is about 3:1. ### Claim 61 (depends on 58) The self-locking nut of claim 58, wherein a ratio of x:y is about 4:1.