# US 9,433,812 B2 · Sports or exercise training device for hand-swung implements

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- Number: US 9,433,812 B2
- Document ID: US9433812B2
- Status: Granted
- Kind: B2
- Application number: 14/817,130
- Filed: 2015-08-03
- Published: 2015-11-26
- Granted: 2016-09-06
- Earliest claimed: 2013-12-30
- Applicants: Francisco J. Sillik
- Inventors: Francisco J. Sillik
- Web page: https://patentgrep.com/patent/US9433812B2

## CPC

- A63B 15/005: {with a weight movable along the longitudinal axis of the club due to centrifugal forces}
- A63B 59/50: Substantially rod-shaped bats for hitting a ball in the air, e.g. for baseball
- A63B 60/42: Devices for measuring, verifying, correcting or customising the inherent characteristics of golf clubs, bats, rackets or the like, e.g. measuring the maximum torque a batting shaft can withstand
- A63B 69/0002: {for baseball}
- A63B 60/50: with through-holes (A63B60/18 takes precedence; for stringing purposes A63B49/00)
- A63B 2069/0008: {for batting}
- A63B 2102/18: Baseball, rounders or similar games
- A63B 2208/0204: Standing on the feet
- A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H)

## Abstract

A hand-held sports or exercise training device configured to improve the swing of a user that includes a hollow body defining a interior volume extending within the device and a slidable mass having an passage that extends through the mass in the direction of movement, or, alternative, one or more passages that allow air flow are contained in a sleeve housing the slidable mass and/or in the bat end. The slidable mass is contained within the interior volume or an added sleeve and is in contact with an interior circumference of the hollow body or sleeve. As a user swings the device, the moment of inertia for the device changes such that swing mechanics and/or timing can be improved.

## Claims

### Claim 1

A sports or exercise training device configured to be swung by one or both hands of a user, comprising:
a hollow body defining a interior volume; and
a slidable mass, wherein the slidable mass is contained and slides within a generally cylindrical sleeve having a first end and a second end and the generally cylindrical sleeve is in nested arrangement with an interior circumference of said hollow body, and wherein said sleeve includes at least a pair of openings disposed proximally to each sleeve end or in a device end and an opposite end of said sleeve, and wherein one of said at least a pair of openings is larger than the other.

### Claim 2 (depends on 1)

The training device of claim 1, wherein said generally cylindrical sleeve is held in nested arrangement by a plurality of struts.

### Claim 3 (depends on 1)

The training device of claim 1, wherein said slidable mass is free from contact with any structure within said hollow body except an inner surface of said generally cylindrical sleeve and an end cap of the device or end fitting of the sleeve.

### Claim 4 (depends on 1)

The training device of claim 1, wherein a magnet is disposed at a handle end and the slidable mass includes at least a magnetic portion configured to seat the slidable mass through magnetic attraction to the magnet.

### Claim 5

A sports or exercise training device configured to be swung by one or both hands of a user, comprising:
a hollow body defining a interior volume within said training device; and
a slidable mass having a passage that extends through the mass in the direction of movement, wherein the slidable mass is contained within said interior volume and, wherein said passage that extends through the mass has a different diameter at each end of said mass.

### Claim 6 (depends on 5)

The training device of claim 5, wherein said hollow body includes a magnet disposed at a handle end of said device and said slidable mass includes at least a magnetic portion configured to seat the slidable mass through magnetic attraction to said magnet and to unseat the slidable mass from said magnet upon the application of a swinging force by said user.

### Claim 7 (depends on 5)

The training device of claim 5, wherein said slidable mass is free from contact with any structure within said hollow body except an inner surface of said interior volume and an end cap of the device.