Patent ID: 6835248
Filing Date: 2004-12-28
Classification: B05B,B25J

Abstract:
A robotic paint applicator located in an enclosed paint booth having a potentially combustible atmosphere, said robotic paint applicator comprising: a first substantially air-tight housing enclosure including a first explosion proof electric motor therein, a second substantially air-tight housing enclosure mounted on said first housing enclosure containing a second explosion proof electric motor therein, and a robot arm mounted on said second housing enclosure having a paint applicator, said first and second explosion proof electric motors each including an enclosed motor housing, a gas inlet and a gas outlet, a source of non-combustible gas located outside said enclosed paint booth, a first gas line connected to said source of non-combustible gas and separate gas lines connecting said first gas line to each of said gas inlets of said motor housings directing non-combustible gas into said motor housings through said gas inlets of said motor housings, creating a positive pressure of non-combustible gas in said motor housings, preventing entry of said potentially combustible atmosphere and said non-combustible gas received in said first and second enclosures from said gas outlets of said motor housings creating a positive pressure of non-combustible gas in said in said first and second housing enclosures, preventing entry of said potentially combustible atmosphere in said first and second enclosures, a valve controlling flow of non-combustible gas through said first gas line and a pressure sensitive control connected to said valve maintaining a predetermined pressure of non-combustible gas in said housing enclosures.