# US 11,077,537 B2 · Adjustable chain wrench and method of use

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- Number: US 11,077,537 B2
- Document ID: US11077537B2
- Status: Granted
- Kind: B2
- Application number: 16/273,571
- Filed: 2019-02-12
- Published: 2020-08-13
- Granted: 2021-08-03
- Earliest claimed: 2019-02-12
- Applicants: Clair D. Niles
- Inventors: Clair D. Niles
- Web page: https://patentgrep.com/patent/US11077537B2

## CPC

- B25B 13/52: Chain or strap wrenches
- B25B 23/16: Handles (in general B25G)
- B25B: TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING

## Abstract

A chain wrench which utilizes ordinary high-speed drive chain to form an adjustable, replaceable chain wrench of unlimited length potential. A sprocket for gripping at the head of the wrench, and allows the chain to nearly completely wrap about the object to be turned or held, preventing the need for a gripping portion which tends to damage or crush the object being turned or held. Multiple such chains could be used simultaneously.

## Claims

### Claim 1

A chain wrench comprising:
a handle with a gripping end and a wrench end;
said wrench end comprising a first sprocket connected to said wrench end via a first pin, said pin fixing said first sprocket about said wrench end;
a first pivot arm pivotally connected to said first sprocket, said first pivot arm ending in a chain connector;
a first chain comprising a high speed chain of a first length having a first end affixed to said chain connector and a second end extending away from said chain connector;
said first chain configured to be wrapped about a body, such that said second end of said first chain is wrapped about said body and placed over said first sprocket;
said first sprocket and first chain are radially spaced from a first side of said handle;
a second sprocket connected to said wrench end via a second pin, said second pin fixing said second sprocket about said wrench end;
a second pivot arm pivotally connected to said second sprocket, said second pivot arm ending at said chain connector;
a second chain comprising a high-speed chain of a second length having a first end affixed to said chain connector and a second end extending away from said chain connector;
said second chain configured to be wrapped about said body, such that said second end of said second chain is wrapped about said body and placed over said second sprocket;
said second sprocket and second chain are radially spaced from a second side of said handle, said second side of said handle being opposite to said first side;
whereby said first chain is tightened about said body, such that said second chain wraps a perimeter comprising at least 90% of a perimeter of said body; and
whereby said first chain is tightened about said body, such that said first chain wraps a perimeter comprising at least 90% of a perimeter of said body.

### Claim 2 (depends on 1)

The chain wrench of claim 1, further comprising:
said sprocket configured to tighten said chain about said body by rotating said handle while chain lengths of said chain are received within teeth of said sprocket.

### Claim 3 (depends on 1)

The chain wrench of claim 1, wherein said body comprises a circular cross section.

### Claim 4 (depends on 1)

The chain wrench of claim 1, further comprising:
said first chain configured to be disconnected from said chain connector; and
a second chain configured to be connected in place of said first chain, wherein said second chain comprising a high speed chain of a second length having a first end affixed to said chain connector and a second end extending away from said chain connector; and
whereby said second chain is tightened about said body, such that said second chain wraps a perimeter comprising at least 90% of a perimeter of said body.

### Claim 5

A chain wrench comprising:
a handle with a gripping end and a wrench end;
said wrench end comprising a first sprocket connected to said wrench end via a first pin, said first pin fixing said first sprocket about said wrench end;
said wrench end further comprising a second sprocket connected to said wrench end via a second pin, said second pin fixing said second sprocket about said wrench end;
a first pivot arm pivotally connected to said first sprocket, said first pivot arm ending in a chain connector;
a second pivot arm pivotally connected to said second sprocket, said second pivot arm ending in said chain connector;
a first chain comprising a high speed chain of a first length having a first end affixed to said chain connector and a second end extending away from said chain connector;
said first chain configured to be wrapped about a body, such that said second end of said first chain is wrapped about said body, under said chain connector, and placed over said first sprocket;
a second chain comprising a high speed chain of a first length having a first end affixed to said chain connector and a second end extending away from said chain connector;
said second chain configured to be wrapped about a body, such that said second end of said second chain is wrapped about said body, under said chain connector, and placed over said second sprocket;
said first sprocket and first chain are radially spaced from a first side of said handle;
said second sprocket and second chain are radially spaced from a second side of said handle, said second side of said handle being opposite to said first side; and
whereby said first chain is tightened about said body, such that said first chain wraps a perimeter comprising at least 90% of a first circumference of said body and said second chain is tightened about said body, such that said second chain wraps a perimeter comprising at least 90% of a second circumference about said body.

### Claim 6 (depends on 5)

The chain wrench of claim 5, further comprising:
said first and second chains configured to be disconnected from said chain connector;
a third chain and a fourth chain each being of a second length and each configured to be connected to said chain connector to replace a respective one of said first and second chains; and
wherein said second length differs from said first length.

### Claim 7

A method of turning a body with a chain wrench, the method comprising the steps:
wrapping a first chain about a body, said first chain having a first end connected to a chain connector and a second end being free;
wrapping said first chain second end around said body, under said chain connector, and onto a first sprocket such that said first chain contacts at least 90% of a perimeter about said body, said first sprocket being connected to said chain connector via a first pivot arm;
linking links of said first chain into teeth of said first sprocket and tightening said first chain about said body;
rotating a handle connected to said sprocket, pivot arm, and chain connector such that said first chain further tightens about said body;
wrapping a second chain about said body, said second chain having a first end connected to said chain connector and a second end being free;
wrapping said second chain second end around said body, under said chain connector, and onto a second sprocket such that said second chain contacts at least 90% of a perimeter about said body, said second sprocket being connected to said chain connector via a second pivot arm;
linking links of said second chain into teeth of said second sprocket and tightening said second chain about said body;
wherein said first sprocket and first chain are radially spaced from a first side of said handle;
wherein said second sprocket and second chain are radially spaced from a second side of said handle, said second side of said handle being opposite to said first side; and
rotating said body by rotating said handle as said first chain grips said body.

### Claim 8 (depends on 7)

The method of claim 7, further comprising the steps:
disconnecting said first chain from said chain connector;
connecting a second chain to said chain connector;
wherein said first chain is of a first length; and
wherein said second chain is a of a second length, said second length different from said first length.

### Claim 9 (depends on 7)

The method of claim 7, wherein said first chain comprises a standard high speed chain.