# US 8,784,003 B2 · Road construction machine particularly a road finisher or road finisher feeder

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- Number: US 8,784,003 B2
- Document ID: US8784003B2
- Status: Granted
- Kind: B2
- Application number: 13/051,396
- Filed: 2011-03-18
- Published: 2011-09-29
- Granted: 2014-07-22
- Earliest claimed: 2010-03-23
- Assignees: Joseph Vogele AG
- Applicants: Michael Heindtel
- Inventors: Michael Heindtel
- Web page: https://patentgrep.com/patent/US8784003B2

## CPC

- E01C 19/48: for laying-down the materials and consolidating them, or finishing the surface {, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ (E01C19/002, E01C23/065 take precedence; devices for guiding or controlling the machines along a predetermined path E01C19/004)}
- E01C: CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR (forming roads or like surfaces by compacting or grading snow or ice E01H)

## Abstract

A road construction machine, particularly a road finisher or a feeder for a road finisher, with a primary drive unit including at least one combustion engine driving a three-phase generator, and further including at least one connection means for at least one conventional alternating current standard consumer, at least one stabilized voltage supply unit is connected between the connection means and the three-phase generator, wherein the voltage supply unit provides standard mains voltage with a permanently stable frequency at the connection means independent of the speed of the combustion engine driving the three-phase generator.

## Claims

### Claim 1

A road finisher or a feeder for a road finisher with a primary drive unit, comprising
at least one electrical heating apparatus operable with alternating voltage with varying frequency,
a combustion engine driving at least one three-phase generator for supplying the at least one electrical heating apparatus with alternating voltage with varying frequency, and
at least one connection means for at least one conventional alternating current consumer,
a stabilized voltage supply unit having at least one universal conversion circuit including a bridge rectifier or an intermediate circuit containing a controlled power supply, respectively for first generating an intermediate voltage and secondly generating a standard mains voltage with a permanently stable frequency from the intermediate voltage, the stabilized voltage supply unit being connected between the connection means and the three-phase generator to provide the standard mains voltage at the connection means which is connected via a connection line to the universal conversion circuit, the voltage supply unit being connected directly to the three-phase generator or to a securing system or a secured supply line of the at least one electrical heating apparatus.

### Claim 2 (depends on 1)

A road finisher or feeder for a road finisher as claimed in claim 1, wherein the connection means comprises at least one grounded socket.