# US 12,108,844 B2 · Rope tightener

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- Number: US 12,108,844 B2
- Document ID: US12108844B2
- Status: Granted
- Kind: B2
- Application number: 18/323,683
- Filed: 2023-05-25
- Published: 2024-02-29
- Granted: 2024-10-08
- Earliest claimed: 2022-08-26
- Assignees: Kau Shen Industrial Co., Ltd.
- Applicants: Kau Shen Industrial Co., Ltd.
- Inventors: Po-Chun Chang
- Web page: https://patentgrep.com/patent/US12108844B2

## CPC

- A43C 7/00: Holding-devices for laces
- A43C 11/165: {characterised by a spool, reel or pulley for winding up cables, laces or straps by rotation}
- A43C: FASTENINGS OR ATTACHMENTS OF FOOTWEAR; LACES IN GENERAL

## Abstract

A rope tightener includes a bottom seat having a bottom plate and an annular body portion, a roll-up disc having a pivot hole, and a cover having ratchet teeth and fixed to the roll-up disc. The bottom seat has an accommodating space, and a rotation axle disposed in the pivot hole. The annular body portion has at least one pawl corresponding to the ratchet teeth. The cover drives the roll-up disc to rotate or displace between pressed-down and pulled-up positions relative to the bottom seat. When the cover is located at the pressed-down position, the ratchet teeth are engaged with the pawl, enabling the cover to drive the roll-up disc to rotate about the rotation axle in a single direction. When the cover is located at the pulled-up position, the ratchet teeth are separated from the pawl, enabling the cover to drive the roll-up disc to rotate freely.

## Claims

### Claim 1

A rope tightener comprising:
a bottom seat having a bottom plate, an annular body portion extending upwardly from the bottom plate, an accommodating space formed by the bottom plate and the annular body portion, and a rotation axle extending upwardly from the bottom plate and located in the accommodating space, the annular body portion having at least one pawl;
a roll-up disc having a pivot hole, the pivot hole being sleeved onto the rotation axle to make the roll-up disc rotatably disposed in the accommodating space and slidable upwardly and downwardly along the rotation axle; and
a cover fixedly connected to the roll-up disc, thereby capable of driving the roll-up disc to rotate, the cover having a plurality of ratchet teeth, the ratchet teeth and said at least one pawl corresponding to each other, the cover being able to drive the roll-up disc to displace relative to the bottom seat between a pressed-down position and a pulled-up position, when the cover is located at the pressed-down position, the ratchet teeth being engaged with said at least one pawl, enabling the cover to drive the roll-up disc to rotate about the rotation axle in a single direction, when the cover is located at the pulled-up position, the ratchet teeth being separated from said at least one pawl, enabling the cover to drive the roll-up disc to rotate freely; and
an elastic member mounted to the roll-up disc and provided with two elastic abutted portions;
wherein an outer peripheral surface of the rotation axle of the bottom seat has a first annular groove and a second annular groove; when the cover is located at the pressed-down position, the elastic abutted portions of the elastic member are wedged in the first annular groove of the rotation axle; when the cover is located at the pulled-up position, the elastic abutted portions of the elastic member are wedged in the second annular groove of the rotation axle.

### Claim 2 (depends on 1)

The rope tightener as claimed in claim 1, wherein the roll-up disc has a bottom plate; the bottom plate comprises a first bottom portion, a second bottom portion disposed separately from the first bottom portion, and a connecting portion connected between the first and second bottom portions; the elastic abutted portions of the elastic member are abutted against two sides of the connecting portion of the roll-up disc respectively.

### Claim 3 (depends on 2)

The rope tightener as claimed in claim 2, wherein the roll-up disc further has an accommodating groove; the accommodating groove is located between the first and second bottom portions and the connecting portion; the elastic member further has an arc-shaped body portion located between the elastic abutted portions; the arc-shaped body portion of the elastic member is accommodated in the accommodating groove of the roll-up disc so that the elastic member and the roll-up disc are driven by the cover together to slide upwardly and downwardly relative to the rotation axle.