초록 ▼

Apparatus for attachment to the side wall of a hopper or bin, having connections to an extenal source of pressurized air, and having an annular orifice internal to the hopper or bin, wherein the annular orifice is covered by a resilient ring, thereby pemitting the flow of pressurized air outwardly t

Apparatus for attachment to the side wall of a hopper or bin, having connections to an extenal source of pressurized air, and having an annular orifice internal to the hopper or bin, wherein the annular orifice is covered by a resilient ring, thereby pemitting the flow of pressurized air outwardly through the annular orifice while protecting the annular orifice from contamination and plugging by materials stored in the bin or hopper.

대표청구항 ▼

1. An apparatus attachable to a wall surface for directing a pressure wave of air radiating outwardly in all directions normal to a central passage, comprising (a) a threaded member having a length sufficient to pass through a wall surface, said threaded member having a central passage therethrou

1. An apparatus attachable to a wall surface for directing a pressure wave of air radiating outwardly in all directions normal to a central passage, comprising (a) a threaded member having a length sufficient to pass through a wall surface, said threaded member having a central passage therethrough; (b) a raised flange on one end of said threaded member, said flange comprising a circular shoulder concentrically positioned about said central passage; a truncated conical section having a maximum diameter less than the diameter of said circular shoulder, projecting concentrically from said shoulder and terminating in a reduced diameter flat surface; at least two spacers projecting from said flat surface, and said central passage opening through said flat surface between said spacers; (c) an end cap comprising a circular shoulder of substantially the same diameter as said flange shoulder; a truncated conical section having a maximum diameter less than the diameter of said shoulder, projecting concentrically from said shoulder and terminating in a flat surface; and holes through said end cap alignable with said at least two spacers; (d) means for removably fastening said end cap to said flange with said respective flat surfaces of said truncated conical sections in facing and spaced apart relationship, thereby forming an annular gap in the space between said conical sections, said gap being in air flow communication with said central passage; and (e) a resilient O-ring seated against said respective truncated conical sections, said O-ring being sized for compressible fit about said conical sections to cover said facing portions and the spaced apart gap formed therebetween. 2. The apparatus of claim 1, further comprising a pressure valve attached to said threaded member. 3. The apparatus of claim 2, further comprising a source of pressurized air attached to said pressure valve. 4. The apparatus of claim 3, further comprising means for actuating said pressure valve for brief periods of time.