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US 4,889,160 AGranted
Antitamper vent arrangement for a receptacle or enclosure
OwnerJohnny S. Sheetsinventor
Life of this patent
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OwnerJohnny S. Sheetsinventor
Estimating the term…
A two-way tamper-proof vent arrangement especially constructed for food grade receptacles and tanks is disclosed. The vent arrangement includes inner and outer stainless steel inverted cup members which are nested together and are concentrically mounted on a bracket over a tubular vent opening in the receptacle or tank. The outer cup member has a lower circumferential edge which bears on the surface of the receptacle or tank surrounding the vent opening so that tubes or other instruments cannot gain access to the vent opening. The inner cup member has a lower circumferential edge spaced from the surface of the receptacle surrounding the vent opening. The outer cup member is provided with a plurality of small openings to permit the inflow and outflow of venting air along a labyrinth path formed by the inner and outer cup members between the exterior of the outer cup member and the vent opening.
A vent for a receptacle comprising a vent opening structure and inner and outer cup members, bracket means mounted to the vent opening structure for securing the inner and outer cup members to the vent opening structure, said vent opening structure comprising a tubular neck mounted to the receptacle, said bracket means comprising a vent nut for removable connection to the tubular neck and an upstanding bracket mounted to said vent nut, each cup member comprising a tubular wall having one closed end and one open end, the inner cup member having a cross-sectional area and an end-to-end height less than the corresponding area and height of the outer cup member, said outer cup member having flow openings in the wall thereof, the inner cup member being nested in the outer cup member and the nested cup members being mounted to said upstanding bracket.
A vent for a receptacle having a vent opening structure comprising inner and outer cup members, each cup member comprising a tubular wall having one closed end and one open end, the inner cup member having a cross-sectional area and an end-to-end height less than the corresponding area and height of the outer cup member, said outer cup member having flow openings in the wall thereof, said inner cup member being disposed within the outer cup member, the open ends of said cup members covering the vent opening structure in the receptacle to provide a labyrinth path for the inflow and outflow of air through said vent, the walls of said cup members being cylindrical, said inner cup member being coaxially nested in the outer cup member to form an annular space between the cylindrical walls of said cup members, and filter means disposed in said annular space for filtering the air flow along the labyrinth path of the vent.
A tamper-proof two-way vent for a receptacle or enclosure having a vent opening structure comprising a bracket mounted on said vent opening structure, a first inverted, cylindrical cup member mounted to said bracket over said opening, said first cup member having an open end defined by an annular edge, the annular edge of the first cup member being spaced from the surface of the receptacle or enclosure, a second inverted, cylindrical cup member mounted to said bracket over said first cup member, said second cup member having an open end defined by an annular edge, the annular edge of the second cup member contacting the surface of the receptacle or enclosure, and a plurality of flow openings in said second cup member disposed at a height above the annular edge of the first cup member to provide a labyrinth path of inflow and outflow of air through said vent.
A vent for a receptacle having a vent opening structure comprising inner and outer cup members, each cup member comprising a tubular wall having one closed end and one open end, the inner cup member having a cross-sectional area and an end-to-end height less than the corresponding area and height of the outer cup member, said outer cup member having flow openings in the wall thereof, said inner cup member being disposed within the outer cup member, the open ends of said cup members covering the vent opening structure in the receptacle to provide a labyrinth path for the inflow and outflow of air through said vent, the walls of said cup members being cylindrical, said inner cup member being coaxially nested in the outer cup member to form an annular space between the cylindrical walls of said cup members, said cup members each having an annular edge at the open end thereof, said open ends confronting the receptacle surface surrounding the vent opening, the annular edge of the outer cup member being in contact with said receptacle surface, the annular edge of the inner cup member being spaced from said receptacle surface to form a passage from the annular space around the annular edge of the open end of the inner cup member and to the interior of the inner cup member.
Dependencies are inferred from the claim text.