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US Patent 7770553 Manual working machine

Patent 7770553 was granted and assigned to Dolmar on August, 2010 by the United States Patent and Trademark Office.

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Patent
Patent

Patent attributes

Current Assignee
Dolmar
Dolmar
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
7770553
Date of Patent
August 10, 2010
Patent Application Number
10577283
Date Filed
October 19, 2004
Patent Primary Examiner
‌
Stephen K. Cronin
Patent abstract

In order to provide a handheld work machine that does not require expensive start circuitry for the critical start-up phase of the combustion engine, and in which nevertheless the required constant supply voltage for the engine is present in order to achieve optimum starting behavior, a handheld work machine is provided with at least one combustion engine which in operation requires a supply voltage, and with a voltage generator that supplies a generator voltage that depends on the rotary speed of the combustion engine, which generator voltage is used to generate the supply voltage, wherein the handheld work machine is electrically connected to an additional voltage source that prior to starting the combustion engine provides the required supply voltage that at this point in time is not yet present.

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