# US 12,006,962 B2 · Anti-vibration anti-loosening threaded fastener

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- Number: US 12,006,962 B2
- Document ID: US12006962B2
- Status: Granted
- Kind: B2
- Application number: 17/199,753
- Filed: 2021-03-12
- Published: 2022-09-15
- Granted: 2024-06-11
- Earliest claimed: 2021-03-12
- Assignees: Shoxproof Technology Co., Ltd.
- Applicants: Huixiang Precision Co., Ltd.
- Inventors: Sheng-Hsiung Shih
- Web page: https://patentgrep.com/patent/US12006962B2

## CPC

- F16B 2/18: using cams, levers, eccentrics, or toggles {(for connections of rods or tubes engaged telescopically F16B7/1418, F16B7/1427, F16B7/1454)}
- F16B 41/002: {Measures against loss of bolts, nuts or pins (devices for fastening nuts to surfaces F16B37/04)}
- F16B 35/044: {Specially-shaped ends}
- F16B 35/06: Specially-shaped heads (special shape in order to rotate the bolt F16B23/00 {; separate hook adaptors for bolts F16B43/025})
- F16B 37/14: Cap nuts; Nut caps or bolt caps
- F16B 39/28: by special members on, or shape of, the nut or bolt (F16B39/26 takes precedence; locknuts F16B39/12)
- 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

An anti-vibration anti-loosening threaded fastener is revealed. The threaded fastener includes a bolt and a nut. The bolt consists of a head, a stud disposed on a bottom surface of the head, and a through hole mounted axially in the stud. The nut is composed of a threaded slotted portion provided with an opening facing upward and fastened to the stud by threaded connection, and a post protruding from central area of a bottom of the threaded slotted portion. The post and the through hole are disposed eccentrically to each other so that forces that pull the bolt and the nut together are generated when the bolt and the nut are threaded and fastened with each other and the post is mounted into the through hole. Thereby the bolt and the nut are fastened more tightly and the threaded fastener is vibration resistant and anti-loosening.

## Claims

### Claim 1

An anti-vibration anti-loosening threaded fastener comprising:
a bolt having a head, a threaded stud extending from a bottom surface of the head, the stud having a bore formed axially in the stud;
a nut having a cavity formed therein, the cavity having opposing open and closed ends and a threaded portion formed on a circumferential wall of the cavity, the open end of the cavity being configured for threaded engagement with the stud; and
a post protruding axially from a central area of a bottom of the cavity and passing into the bore of the stud,
wherein one of the bore or the post is eccentrically disposed with respect to an axis of the stud and they are thereby eccentrically mated one with respect to the other and forcibly contact one another when the bolt and the nut are threadedly fastened to each other to thereby resist loosening of the nut relative to the bolt.

### Claim 2 (depends on 1)

The threaded fastener as claimed in claim 1, wherein the bore is a round hole while the post is a cylinder configured to be received within the bore.

### Claim 3 (depends on 2)

The threaded fastener as claimed in claim 2, wherein the bore penetrates the head.

### Claim 4 (depends on 3)

The threaded fastener as claimed in claim 3, further comprising a sensor mounted in the bore, wherein the post contacts and presses against the sensor when the bolt is threaded and fastened with the nut securely, wherein the sensor detects a pressing force of the post.

### Claim 5 (depends on 2)

The threaded fastener as claimed in claim 2, further comprising a sensor mounted in the bore, wherein the post contacts and presses against the sensor when the bolt is threaded and fastened with the nut securely, wherein the sensor detects a pressing force of the post.

### Claim 6 (depends on 1)

The threaded fastener as claimed in claim 1, wherein the bore penetrates the head.

### Claim 7 (depends on 6)

The threaded fastener as claimed in claim 6, further comprising a sensor mounted in the bore, wherein the post contacts and presses against the sensor when the bolt is threaded and fastened with the nut securely, wherein the sensor detects a pressing force of the post.

### Claim 8 (depends on 1)

The threaded fastener as claimed in claim 1, further comprising a sensor mounted in the bore, wherein the post contacts and presses against the sensor when the bolt is threaded and fastened with the nut securely, wherein the sensor detects a pressing force of the post.