Pneumatically or hydraulically loosening, removing or dislodging undesirable matter

Official title: {Pneumatically or hydraulically loosening, removing or dislodging undesirable matter, e.g. removing by blowing, suction or flushing (flushing devices incorporated in tramay tracks E01B21/02); Loosening or removing by means of heat (built-in heating, blowing or liquid applying devices for switches E01B7/24)}

E01H8/125 (Pneumatically or hydraulically loosening, removing or dislodging undesirable matter) appears on 6 US grants and 10 published applications in this corpus.