Patent ID: 8070844
Filing Date: 2011-12-06
Classification: B01D,Y10T

Abstract:
1. A blowback dust removal attachment for a vacuum loader, comprising: a) a housing comprising three coaxial contiguous cylindrical sections having uniform diameter, the interior of a first one of the sections defining a high pressure chamber, the interior of a third one of the sections defining a pilot air chamber, an intermediate chamber within a second one of the sections and a one inch diameter exhaust port from the intermediate chamber of the housing opening outwardly to the exterior through the second cylindrical section in a direction perpendicular to the axis of the cylindrical sections which is adapted for connection to vacuum loader proximate a dust filter located therewithin; b) a single diaphragm valve within the second cylindrical section of the housing opening responsively to increase in pressure in the pilot air chamber and providing a openable seal between the high pressure chamber and the intermediate chamber, comprising; c) a fitting for connecting an air supply to the pilot air chamber to move the diaphragm in response to pressurized air furnished to the pilot air chamber; and d) the high pressure chamber of the housing being adapted for connection to a source of high pressure air e) a first disk member retained by and fitting snugly within an end portion of the first cylindrical section to define one end of the housing; f) a second disk member retained by and fitting snugly within an end portion of the third cylindrical section to define a remaining end of the cylindrical housing; g) a plurality of rods extending between and through the disk members, central portions of the rods passing through the diaphragm and being within the cylindrical housing, ends of the rods being threaded; h) fasteners in threaded engagement with the rods on both ends of the rods outboard of the disks, to retain the rods in place and the cylindrical sections in tight contacting engagement.