Patent ID: 7077632
Filing Date: 2006-07-18
Classification: F04D

Abstract:
1. A blower comprising: a housing; a single blower pipe connected to said housing; an internal combustion engine for providing an adjustable power output and said engine being located within said housing; a blower wheel driven by said engine for generating a blower air flow wherein all of said blower airflow passes through said single blower pipe; a reduction device mounted in said air flow downstream of said blower wheel for changing the clear flow cross section of said blower pipe in dependence upon the adjusted power output of said engine; a mechanical actuating element; and, said mechanical actuating element being operatively connected to said reduction device for controlling the latter; and, said mechanical actuating element being a throttle lever for adjusting the power output of said internal combustion engine having a position coupled to the position of said reduction device so as to reduce said clear flow cross section during idle operation of said engine and thereby reducing the engine power required to move the air flow; and that during full load operation, said reduction device being in its open position.