# US 5,344,139 A · Racket shaft mounting device

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- Number: US 5,344,139 A
- Document ID: US5344139A
- Status: Granted
- Kind: A
- Application number: 08/149,300
- Filed: 1993-11-09
- Granted: 1994-09-06
- Earliest claimed: 1993-11-09
- Assignees: Jan Sports Products Corp.
- Inventors: Chao-I Wu
- Web page: https://patentgrep.com/patent/US5344139A

## CPC

- A63B 49/03: characterised by throat sections, i.e. sections or elements between the head and the shaft
- A63B 49/032: T-shaped connection elements
- A63B 49/02: Frames
- A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H)

## Abstract

A racket shaft mounting device includes a head frame to hold a network of catgut, and a tubular shaft having a front end connected to the head frame by a connecting device and a rear end terminated to a hand grip, wherein the head frame has two opposite ends fitted one into the other; the connecting device includes a connecting rod having one end fitted into a through hole through the connected two opposite ends of the head frame and an opposite end fitted into the tubular shaft, and a covering layer directly molded on the connecting area between the head frame and the tubular shaft.

## Claims

### Claim 1

A racket shaft mounting device comprising a head frame to hold a network of catgut, a shaft having a rear end terminated to a hand grip and a front end connected to said head frame by a connecting device, wherein said head frame is made in the shape of an open loop having a projecting rod with a first through hole on one end thereof, a recess and a second through hole on an opposite end thereof, said projecting rod being fitted into said recess permitting said first and second through holes to be aligned; said connecting device comprises a connecting rod having one end fitted into said first and second through hole and an opposite end fitted into a hole on the front end of said shaft, and a thermosetting covering layer covered over the connecting area between said head frame and said shaft.

### Claim 2 (depends on 1)

The racket shaft mounting device of claim 1 wherein said covering layer is made of plastics directly molded on the connecting area between said head frame and said shaft.

### Claim 3 (depends on 1)

The racket shaft mounting device of claim 1 wherein said covering layer is made of a thermosetting fiber compound and molded on the connecting area between said head frame and said shaft through a laminate molding process.

### Claim 4 (depends on 1)

The racket shaft mounting device of claim 1 wherein the strength of structure of said connecting rod is stronger than that of said shaft.