Patent ID: 7275355
Filing Date: 2007-10-02
Classification: A01D

Abstract:
1. A method of cutting grass with a lawn cutting machine having a motor with an output shaft, a rotatable cutting blade and a driven shaft with a driven wheel coupled thereto, said output shaft operably coupled to said cutting blade and said driven shaft, said driven wheel engagable with the ground for propelling said machine at a ground speed, said method comprising: monitoring the speed of said cutting blade; communicating the speed of said cutting blade to an electronic control unit; and by means of the electronic control unit comparing the actual blade speed to a desired substantially constant blade speed value and adjusting one or both of the speed of said cutting blade and said ground speed to maintain the speed of said cutting blade at the desired substantially constant blade speed value while simultaneously allowing the ground speed of said machine to be varied by an operator of the lawn cutting machine.