# US 7,607,237 B2 · Nut and bolt sizing tool

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- Number: US 7,607,237 B2
- Document ID: US7607237B2
- Status: Granted
- Kind: B2
- Application number: 11/730,774
- Filed: 2007-04-04
- Published: 2008-11-13
- Granted: 2009-10-27
- Earliest claimed: 2006-04-18
- Inventors: Douglas Wayne Schafer
- Web page: https://patentgrep.com/patent/US7607237B2

## CPC

- G01B 3/34: Ring or other apertured gauges, e.g. "go/no-go" gauge
- G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS

## Abstract

A tool for nut or bolt sizing, the tool comprising a plurality of relatively thin finger members, at least some of the finger members being provided with a measuring slot or notch which can be used to determine the size of the nut or bolt, and identification means being provided such that the size of the slot or notch can be quite readily determined, the finger members able to move between a first position where the finger members substantially overlie each other and are at least partially restrained into the first position, and a second position where a finger member can be moved to a position where it can be used to size a nut or bolt.

## Claims

### Claim 1

A tool for nut or bolt sizing, the tool comprising a plurality of relatively thin finger members, at least some of the finger members being provided with a measuring slot or notch which can be used to determine the size of the nut or bolt, and identification means being provided such that the size of the slot or notch can be quite readily determined, the finger members able to move between a first position where the finger members substantially overlie each other, and a second position where a finger member can be moved to a position where it can be used to size a nut or bolt, at least some of the finger members being provided with two separate slots, one slot being a metric size and the other slot being an imperial size which is close to the metric size, the finger members being at least partially restrained into the first position by a projection on one side of the finger member and a recess on the other side of the finger member, whereby the projection on one finger member engages with the recess on an adjacent finger member when in the first position to restrain the finger members into the first position, the projection also functioning to facilitate movement of the finger member into the first position by the projection on one finger member contacting and deflecting away an adjacent finger member upon movement of the one finger member into the first position.

### Claim 2 (depends on 1)

The tool as claimed in claim 1, wherein the slot is open ended.

### Claim 3 (depends on 2)

The tool as claimed in claim 2, comprising between 5-30 finger members.

### Claim 4 (depends on 3)

The tool as claimed claim 3, wherein the measuring slots are on opposed longitudinal edges of the finger member.

### Claim 5 (depends on 4)

The tool as claimed in claim 4, wherein the measuring slot is substantially U-shaped in configuration.

### Claim 6 (depends on 5)

The tool as claimed in claim 5, wherein the measuring slot is positioned substantially at the end of the finger member.

### Claim 7 (depends on 1)

The tool as claimed in claim 1, wherein the projection is on one side of the finger member and the recess is on the other side of the finger member, the recess being immediately behind the projection.

### Claim 8 (depends on 7)

The tool as claimed in claim 7, wherein the projection is about midway across the finger member and in the lower half of the finger member.

### Claim 9 (depends on 1)

The tool as claimed in claim 1, wherein at least some and preferably all the finger members are pivotally connected relative to each other about a pivot pin.

### Claim 10 (depends on 8)

The tool as claimed in claim 8, including a cover between which the finger members can be stored.

### Claim 11 (depends on 10)

The tool as claimed in claim 10, wherein the pivot pin comprises a bolt extending through the cover and including a nut to allow the degree of friction between the finger members to be adjusted by tightening or loosening the nut about the bolt.