# US 11,027,406 B2 · Hand machine tool

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- Number: US 11,027,406 B2
- Document ID: US11027406B2
- Status: Granted
- Kind: B2
- Application number: 14/406,480
- Filed: 2013-05-29
- Published: 2015-06-04
- Granted: 2021-06-08
- Earliest claimed: 2012-06-13
- Assignees: Hilti Aktiengesellschaft
- Applicants: Hilti Aktiengesellschaft
- Inventors: Helmut Burger; Thomas Thanner; Rene Richter
- Web page: https://patentgrep.com/patent/US11027406B2

## CPC

- B25F 5/02: Construction of casings, bodies or handles {(B25F5/006, B25F5/008 take precedence)}
- B25F 5/006: {Vibration damping means}
- H02K 7/145: {Hand-held machine tool}
- B25F: COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR {(machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass B23P23/00 and subgroups)}
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

The hand machine tool according to the invention has an integrated tool or a tool holder 2 to receive a tool 4. An electric motor 5 serves to drive the tool 4 or the tool holder 2. A battery pack 18 for supplying power to the electric motor 5 can be pushed into a guide 23 in a first direction. A plurality of electrical contacts 31 for contacting counter contacts 32 of the battery pack 18 are disposed in a contact holder 36. Wires 40, which are connected in each case to one of the electrical contacts 31, have cores which extend in a wave-like manner in the first direction 28 adjacent to the electrical counter contact 32.

## Claims

### Claim 1

A hand machine tool comprising:
an integrated tool or a tool holder for accommodating a tool;
an electric motor for driving the integrated tool or the tool holder;
a guide insertable into a battery pack along a first direction for supplying the electric motor with power; and
a contact holder, wherein multiple electrical contacts are situated in the contact holder for contacting counter contacts of the battery pack;
at least one strand connected to one of the electrical contacts situated in the contact holder of the hand machine tool and having wires having a wave-shaped progression along the first direction adjoining the electrical contact.

### Claim 2 (depends on 1)

The hand machine tool as recited in claim 1 wherein the wires of the strand are braided.

### Claim 3 (depends on 1)

The hand machine tool as recited in claim 1 wherein an entirety of the strand has a wave-shaped progression adjoining the electrical contact.

### Claim 4 (depends on 1)

The hand machine tool as recited in claim 1 wherein the contact holder includes a terminal strip, and one end of the strand is attached in the terminal strip and another end of the strand is attached to one of the contacts.

### Claim 5 (depends on 4)

The hand machine tool as recited in claim 4 wherein a length of the strand is greater than a distance of the terminal strip to the one contact.

### Claim 6 (depends on 4)

The hand machine tool as recited in claim 4 wherein the strand has no insulating tubing between the terminal strip and the contact.

### Claim 7 (depends on 1)

The hand machine tool as recited in claim 1 wherein the electrical contacts are movably mounted in the contact holder.

### Claim 8 (depends on 1)

The hand machine tool as recited in claim 1 wherein the at least one strand is clamped to the electrical contact.

### Claim 9 (depends on 1)

The hand machine tool as recited in claim 1 wherein the at least one strand is in the contact holder.

### Claim 10 (depends on 9)

The hand machine tool as recited in claim 9 wherein the at least one strand is in a channel in the contact holder.