# US 7,407,349 B2 · Boring tool

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- Number: US 7,407,349 B2
- Document ID: US7407349B2
- Status: Granted
- Kind: B2
- Application number: 11/182,969
- Filed: 2005-07-15
- Published: 2006-01-19
- Granted: 2008-08-05
- Earliest claimed: 2004-07-15
- Assignees: Heinz Kaiser AG
- Inventors: Heinz Kaiser; Ernst Hänggi; Ralph Stadelmann
- Web page: https://patentgrep.com/patent/US7407349B2

## CPC

- B23B 29/03421: {by pivoting the tool carriers or by elastic deformation}
- Y10T 279/13: Angularly adjustable or indexing
- Y10T 408/858: Moving means including wedge, screw or cam
- Y10T 408/8595: Pivotable tool-support
- Y10T 408/8598: Screw extending perpendicular to tool-axis
- B23B: TURNING; BORING (arrangements for copying or controlling B23Q)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The boring tool having a basic body (2) in which a tool bit (27) is arranged which has a cutting edge (29) at a front end (27b). The basic body (2) has an opening (3) in which the tool bit (27) is pivotably mounted. Setting means (7) serve to set the pivoted position of the tool bit (27) relative to the basic body (2). Means (16) serve to fix the tool bit (27) in the set pivoted position. The tool bit (27) is pivotable about a pivot point (P) which is essentially neutral in terms of unbalance. The tool bit (27) is preferably connected at a rear end (27a) to a radially adjustable slide (7). The slide (7) can be finely adjusted radially, for example with a micrometer screw (9).

## Claims

### Claim 1

A boring tool, comprising:
a rod-shaped tool bit comprising a front end and a rear end wherein the front end comprises a cutting edge;
a basic body comprising:
an opening defining a front end of the basic body in which the rod-shaped tool bit is pivotably mounted;
setting means comprising a radially adjustable slide in contact with the rear end of said rod-shaped tool bit for slidable movement for setting a pivoted position of the rod-shaped tool bit relative to the basic body; and
fixing means for fixing the rod-shaped tool bit in the set pivoted position, wherein the rod-shaped tool bit is pivotable by a radial displacement of the slide about a pivot point between the front and rear ends of the rod-shaped tool bit which is essentially neutral in terms of balance and wherein the pivot point is formed at a lateral surface of the rod-shaped tool bit.

### Claim 2 (depends on 1)

The boring tool of claim 1, including a micrometer screw for finely adjusting the radial position of said setting means.

### Claim 3 (depends on 2)

The boring tool of claim 2, wherein a sliding means includes a recess, from which the rear end of the rod-shaped tool bit projects.

### Claim 4 (depends on 1)

The boring tool of claim 1, wherein the pivot point is at a substantially smaller distance from the front end of the basic body than from the rear end of the inserted rod-shaped tool bit.

### Claim 5 (depends on 1)

The boring tool of claim 1, including a projection means projecting into said opening for defining the pivot point.

### Claim 6 (depends on 5)

The boring tool of claim 5, wherein the projecting means comprises a ball.

### Claim 7 (depends on 1)

The boring tool of claim 1, including a radially adjustable clamping part extending essentially over an entire depth of the opening for fixing the rod-shaped tool bit.

### Claim 8 (depends on 7)

The boring tool of claim 7, wherein the adjustable clamping part is configured to also clamp the setting means.

### Claim 9 (depends on 1)

The boring tool of claim 1, including a spring loaded pin for pressing the rod-shaped tool bit against said pivot point in a spring-loaded manner.

### Claim 10

A boring tool, comprising:
a rod-shaped tool bit comprising a front end and a rear end wherein the front end comprises a cutting edge;
a basic body comprising:
an opening defining a front end of the basic body in which the rod-shaped tool bit is pivotably mounted;
setting means comprising a radially adjustable slide in contact with the rear end of said rod-shaped tool bit for slidable movement for setting a pivoted position of the rod-shaped tool bit relative to the basic body; and
fixing means for fixing the rod-shaped tool bit in the set pivoted position, wherein the rod-shaped tool bit is pivotable by a radial displacement of the slide about a pivot point between the front and rear ends of the rod-shaped tool bit which is essentially neutral in terms of balance and wherein the pivot point is at a substantially smaller distance from the front end of the basic body than from the rear end of the inserted rod-shaped tool bit.