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US Patent 7275355 Blade and ground speed control system

Patent 7275355 was granted and assigned to Tecumseh Products (company) on October, 2007 by the United States Patent and Trademark Office.

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Patent
Patent
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Patent attributes

Current Assignee
‌
Tecumseh Products (company)
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Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
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Patent Number
72753550
Patent Inventor Names
Arcady Royzen0
G. Michael Adams0
Gordon E Rado0
Date of Patent
October 2, 2007
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Patent Application Number
110697030
Date Filed
March 1, 2005
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Patent Primary Examiner
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Thomas B. Will
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Patent abstract

A self-propelled mower with blade and ground speed controls. The mower includes a motor with an output shaft and a rotatable cutting blade mounted on a blade shaft. The motor may be an internal combustion engine. A torque transmitting mechanism such as a variable diameter pulley defines a rotational speed ratio between the output shaft and the blade shaft. A transmission is coupled to the output shaft. Sensors provide an electronic control unit with the blade speed, ground speed and engine speed. The ECU may be used to maintain either a desired blade speed or a desired ground speed. To maintain a desired blade speed, the ECU monitors the blade speed and, when the blade speed diverges from the desired speed, adjusts either the rotational speed ratio of the output shaft and blade shaft or the ground speed of the mower to maintain the desired blade speed.

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