# US 11,896,885 B2 · Golf putting practice device and auxiliary fastening unit for putter head

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- Number: US 11,896,885 B2
- Document ID: US11896885B2
- Status: Granted
- Kind: B2
- Application number: 17/600,601
- Filed: 2020-04-13
- Published: 2022-06-23
- Granted: 2024-02-13
- Earliest claimed: 2019-05-08
- Applicants: Jong Kap Na
- Inventors: Jong Kap Na
- Web page: https://patentgrep.com/patent/US11896885B2

## CPC

- A63B 69/3676: {for putting (A63B69/3608, A63B69/3661, A63B69/3667 and A63B69/3697 take precedence)}
- A63B 69/3685: {Putters or attachments on putters, e.g. for measuring, aligning (A63B69/3614 takes precedence)}
- A63B 21/02: using resilient force-resisters
- A63B 53/0487: {for putters (A63B53/065 takes precedence)}
- A63B 69/36211: {Mechanical guides guiding the club head end during the complete swing, e.g. rails}
- A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H)

## Abstract

The present disclosure relates to a putting practice device for developing a putting motion for accurately striking a golf ball to a target spot, wherein the putting practice device can be used irrespective of a trajectory and curvature formed by a putter head when striking the golf ball. In addition, the present disclosure includes an auxiliary fastening unit for fastening the putter head to a mounting part.

## Claims

### Claim 1

A golf putting practice device, comprising:
a support;
a rotary body installed in the support rotatably around a rotation axis installed at a central part, including parallel rails, and having a greater curvature than a trajectory formed by a putter head when putting;
an elastic member installed on one or two sides of the rotary body with respect to the rotation axis to apply an elastic force to allow the rotary body to make a rotational motion such that two front ends of the rotary body move up and down in an alternating manner; and
a mounting part which is movable along the parallel rails,
wherein the mounting part is installed such that the putter head is detachably attached to the mounting part, and
the mounting part moves along the parallel rails with the movement of the putter head when putting, and in response to the trajectory formed by the putter head, the rotary body makes the rotational motion around the rotation axis by overcoming the elastic force of the elastic member such that the two front ends of the rotary body move up and down in an alternating manner, and accordingly the mounting part and the parallel rails are kept in close contact, and the mounting part is kept tightly fastened to the putter head.

### Claim 2 (depends on 1)

The golf putting practice device according to claim 1, wherein the elastic member is an elastic spring or an elastic plate installed between the support and the rotary body, and in response to the movement of the mounting part along the parallel rails, the elastic member applies the elastic force to the rotary body to push up or pull down the rotary body.

### Claim 3 (depends on 1)

The golf putting practice device according to claim 1, wherein two parallel rails are formed in parallel along a lengthwise direction of the rotary body, and
the mounting part includes:
two wheels movably installed along the two parallel rails;
a connecting member connecting the two wheels; and
a protrusion which protrudes from the connecting member, and is inserted into a fastening groove of the putter head.

### Claim 4 (depends on 3)

The golf putting practice device according to claim 3, wherein the connecting member includes:
two ends fastened to the wheels; and
a central part connecting the two ends, and having a protrusion, and
wherein the central part is formed at a lower height than the two ends and has at least a longer width than the putter head, thereby the putter head strikes a golf ball at a low height.

### Claim 5 (depends on 3)

The golf putting practice device according to claim 3, wherein the rotary body includes a cover, and the cover extends along the parallel rails above the parallel rails to prevent separation of the wheels.