Patent ID: 6955698
Filing Date: 2005-10-18
Classification: F02B,F02M,Y10S

Abstract:
1. An intake arrangement for combustion air of an internal combustion engine including an internal combustion engine of a portable handheld work apparatus, the combustion air being laden with dust, the intake arrangement comprising: an air filter assembly mounted upstream of said engine for purifying said combustion air of said dust; said air filter assembly including a filter housing and an air filter mounted in said filter housing for separating said dust from said combustion air; said filter housing having an opening formed therein through which said combustion air laden with dust passes to said air filter whereat the dust is deposited; carrier airflow means for conducting a carrier airflow; a shutoff device connected between said filter housing and said carrier airflow means; and, said shutoff device being movable between a closed position and an open position whereat an underpressure developed by said carrier airflow causes said dust to be drawn through said shutoff device so that said dust is conveyed away in said carrier airflow.