Patent ID: 7992593
Filing Date: 2011-08-09
Classification: B65D,E03F,Y10T

Abstract:
1. A method of electrically grounding a confined space ventilation system during ventilation of a confined space in order to dissipate static electricity, comprising the step of placing the confined space end of a ventilation conduit in a confined space and the blower end thereof outside of the confined space, the conduit comprising a rigid hollow first section forming a portion of a circle in cross section, the first section being formed of a non-metallic conductive material, wherein the conduit can be used to ventilate the confined space with less obstruction of the port to the confined space than if the first section had a hollow circular cross section of equal area, and wherein the non-metallic conductive material forming the ventilation conduit is sufficiently conductive so that it is not necessary to have a separate metallic grounding wire pass from within the confined space through the port to ground outside of the confined space in order to dissipate static electricity, wherein the method further comprises the step of connecting the conduit to ground wherein the connection to ground is made external of the confined space.