# US 7,607,372 B2 · Method for making a wrench

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- Number: US 7,607,372 B2
- Document ID: US7607372B2
- Status: Granted
- Kind: B2
- Application number: 11/798,953
- Filed: 2007-05-16
- Published: 2008-11-20
- Granted: 2009-10-27
- Earliest claimed: 2007-05-16
- Assignees: Proxene Tools Co., Ltd.
- Inventors: Arthur Wu
- Web page: https://patentgrep.com/patent/US7607372B2

## CPC

- B25B 13/14: by rack and pinion, worm or gear
- B22D 19/06: for manufacturing or repairing tools
- B25B: TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
- B22D: CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES (shaping of plastics or substances in a plastic state B29C; metallurgical processing, selection of substances to be added to metal C21, C22)

## Abstract

A method for making a wrench includes a step of making a mediate member, a movable jaw and an adjusting member, a step of applying heat treatment to the mediate member, the movable jaw and the adjusting member, a step of cleaning respective surfaces of the mediate member, the movable jaw and the adjusting member, and coating a anti-rusting layer on the mediate member, the movable jaw and the adjusting member, and a step of combination to put the mediate member in a mold and making a body by way of injection to integrally connect the mediate member to a head of the main body, the movable jaw and the adjusting member are installed to the body.

## Claims

### Claim 1

A method for making a wrench, comprising:
a step of formation: making a mediate member, a movable jaw and an adjusting member, which are made of metal;
a step of heat treatment: applying heat treatment to the mediate member, the movable jaw and the adjusting member to enhance rigidity;
a step of surface treatment: cleaning respective surfaces of the mediate member, the movable jaw and the adjusting member, coating an anti-rusting layer on the mediate member, the movable jaw and the adjusting member, and
a step of combination: putting the mediate member in a mold and making a body by way of injection, wherein a material making up the body is selected from nonmetallic material or non-iron material, the body including a handle and a head, the mediate member integrally combined with the head of the body, and then the movable jaw and the adjusting member being moveably inserted within the mediate member;
wherein as the material making up the body is nonmetallic material, the nonmetallic material is selected from carbon fibers or glass fibers;
wherein the material making up the body is non-iron material, the non-iron material is selected from aluminum alloy or zinc alloy.

### Claim 2 (depends on 1)

The method as claimed in claim 1, wherein the mediate member is made by way of powder metallurgy, precision casting or metal ejection.

### Claim 3 (depends on 1)

The method as claimed in claim 1, wherein the adjusting member includes a worm member and a shaft extending through the worm member.

### Claim 4 (depends on 1)

The method as claimed in claim 1, wherein the adjusting member includes a restriction member, a male part and a female part, the restriction member is sandwiched between the male part and the female part.

### Claim 5

A method for making a wrench, comprising:
a step of formation: making a mediate member, a movable jaw and an adjusting member, which are made of metal;
a step of heat treatment: applying heat treatment to the mediate member, the movable jaw and the adjusting member to enhance rigidity;
a step of surface treatment: cleaning respective surfaces of the mediate member, the movable jaw and the adjusting member, coating an anti-rusting layer on the mediate member, the movable jaw and the adjusting member, and
a step of combination: putting the mediate member in a mold and making a body which is made of nonmetallic material, the body integrally connected with the mediate member, the movable jaw and the adjusting member being moveably inserted within the mediate member;
wherein the nonmetallic material is selected from carbon fibers or glass fibers.

### Claim 6 (depends on 5)

The method as claimed in claim 5, wherein the mediate member is made by way of powder metallurgy, precision casting or metal ejection.

### Claim 7 (depends on 5)

The method as claimed in claim 5, wherein the adjusting member includes a worm member and a shaft extending through the worm member.

### Claim 8 (depends on 5)

The method as claimed in claim 5, wherein the adjusting member includes a restriction member, a male part and a female part, the restriction member is sandwiched between the male part and the female part.