# US 7,611,449 B2 · Recoil shock absorber

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- Number: US 7,611,449 B2
- Document ID: US7611449B2
- Status: Granted
- Kind: B2
- Application number: 11/830,247
- Filed: 2007-07-30
- Published: 2009-02-05
- Granted: 2009-11-03
- Earliest claimed: 2007-07-30
- Assignees: Kellion Corporation
- Inventors: Yong Woo Kim
- Web page: https://patentgrep.com/patent/US7611449B2

## CPC

- A63B 15/005: {with a weight movable along the longitudinal axis of the club due to centrifugal forces}
- A63B 60/04: Movable ballast means {(A63B15/005 takes precedence)}
- A63B 60/54: with means for damping vibrations
- A63B 69/3623: {for driving (A63B69/3608, A63B69/3658, A63B69/3661, A63B69/3667 and A63B69/3691 take precedence)}
- A63B 21/023: {Wound springs}
- A63B 60/06: Handles
- A63B 2071/0063: {Shock absorbers}
- A63B 2209/00: Characteristics of used materials
- A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H)

## Abstract

A golf exerciser in the form of a swingable tube containing a movable mass supported by an extension spring is provided with a shock absorber cooperating with a proximal end mount for the spring. This absorbs recoil movement of the mass, the spring, the connector, and reduces recoil impact shock that otherwise could be felt by the hands of the person exercising.

## Claims

### Claim 1

In a golf swing exerciser that moves a weight against a resistance of an extension spring during a simulated golf swing, an improvement comprising:
the weight being fixed to a distal end of the extension spring;
a connector fixed to a proximal end of the extension spring to hold the proximal end against an extension force from movement of the weight;
a proximal end stop spaced from the connector;
a mount supported by the end stop and extending to the connector;
the mount allowing the connector and the proximal end of the extension spring to move in a recoil motion toward the end stop;
the mount limiting motion of the connector and the proximal end of the extension spring away from the end stop in response to the extension force; and
a resilient shock absorber arranged between the connector and the stop to cushion the recoil motion.

### Claim 2 (depends on 1)

The golf swing exerciser of claim 1 wherein the fixing of the connector to the extension spring is by terminal convolutions of the extension spring being threaded to the connector.

### Claim 3 (depends on 1)

The golf swing exerciser of claim 1 wherein the mount is a bolt allowing the connector to slide toward and away from the end stop.

### Claim 4

An exercising device used in a simulated golf swing, the device including an extension spring mounted to resist movement of a weight toward a distal end of the device during the golf swing, the device comprising:
the weight being securely attached to a distal end of the extension spring;
a spring connector securely attached to a proximal end of the extension spring;
a proximal end stop spaced from the connector on a proximal side of the connector opposite the spring;
a mount supporting the spring connector relative to the proximal end stop to limit motion of the spring connector and the proximal end of the spring away from the proximal end stop as the weight moves;
a resilient shock absorber disposed between the proximal end stop and the spring connector so that the shock absorber cushions a recoil motion of the spring and the connector toward the proximal end stop; and
the mount allows movement of the spring connector toward the proximal end stop.

### Claim 5 (depends on 4)

The exercising device of claim 4 wherein the mount is a bolt extending from the proximal end stop, and the connector is slidably mounted on the bolt.

### Claim 6 (depends on 4)

The exercising device of claim 4 wherein the shock absorber is supported by the mount.

### Claim 7 (depends on 6)

The exercising device of claim 6 wherein the mount is a bolt and the bolt extends through the shock absorber.

### Claim 8

A golf exerciser that is moved in a simulated golf swing and includes a handle affording a grip to swing the exerciser, and an end stop in a proximal region of the handle, an extension spring mounted to extend toward a distal end of the exerciser, a weight attached to a distal end of the spring, and the spring and weight being arranged so that the weight extends the spring to move toward the distal end of the exerciser when the exerciser is moved in a simulated golf swing, the exerciser comprising:
a connector attached to a proximal end of the spring to resist extending of the spring;
the connector being spaced from the end stop;
a lost motion mount extending across the space from the end stop to the connector;
the mount supporting the connector to allow and to limit movement of the connector and the proximal end of the spring away from the end stop as the weight moves;
the mount also allowing the connector and the proximal end of the spring to move toward the end stop in a recoil movement; and
a resilient recoil shock absorber supported by the mount and arranged in the space between the end stop and the connector so that the shock absorber cushions the recoil movement of the spring connector and the proximal end of the spring toward the end stop.

### Claim 9 (depends on 8)

The golf exerciser of claim 8 wherein the mount is a bolt extending from the end stop, and the spring connector is slidably mounted on the bolt.

### Claim 10 (depends on 9)

The golf exerciser of claim 9 wherein the bolt extends through the shock absorber.

### Claim 11 (depends on 8)

The golf exerciser of claim 8 wherein the spring connector threadably engages the insides of terminal coils of the proximal end of the spring.