초록 ▼

A powered surface maintenance machine having an exhaust air system for dust control is equipped with air filters for removing dust from the air before exhausting it to atmosphere. Automatic means are provided to mechanically shake dust from the filters whenever enough has accumulated on them to adve

A powered surface maintenance machine having an exhaust air system for dust control is equipped with air filters for removing dust from the air before exhausting it to atmosphere. Automatic means are provided to mechanically shake dust from the filters whenever enough has accumulated on them to adversely affect dust control. This filter cleaning is accomplished with no attention from the machine operator and does not interrupt the operation of the machine or the air flow needed for dust control.

대표청구항 ▼

An unattended air cleaning system for use in a powered mobile surface maintenance machine having an air exhaust system for dust control, said unattended air cleaning system comprising: a minimum of two air filters in the air exhaust system arranged such that part of the air stream normally flows thr

An unattended air cleaning system for use in a powered mobile surface maintenance machine having an air exhaust system for dust control, said unattended air cleaning system comprising: a minimum of two air filters in the air exhaust system arranged such that part of the air stream normally flows through each filter, valve means to selectively isolate each of the filters one at a time from the air stream, said valve means also being capable of readmitting airflow through each filter, means to shake or jolt each of the filters individually to remove accumulated dust from it, means to sense the differential air pressure across at least one of the filters to determine when it is at a predetermined level, control means to initiate and carry out an unattended filter cleaning cycle when the predetermined level of differential air pressure is determined, said filter cleaning cycle comprising: isolating a first filter from the air stream, then shaking or jolting said first filter for a predetermined period of time, thereby cleaning it, while it is isolated from the air stream, meanwhile allowing the air stream to flow through the balance of the filters, subsequently readmitting airflow through the first filter, and subsequently dealing in the same way with each of the other filters in turn until all have been cleaned.