E - Fixed Constructions – 03 – B
Patent
E - Fixed Constructions
03
B
190/18, 61/2.4
E03B 11/14 (2006.01) F16K 17/18 (2006.01)
Patent
CA 1206009
ABSTRACT The pressure-vacuum vent is adapted to communicate an internal storage chamber with atmosphere at predetermined pressure and vacuum conditions. The vent includes a poppet valve member that moves upwardly within a body to vent the chamber to atmosphere when the pressure build up in the chamber reaches a predetermined level. A non-deforming mass is supported on the upper wall of the valve member for preventing the member from moving upwardly until the predetermined pressure build up in the storage chamber is reached. A hood assembly overfits the body and includes external and internal hoods. The internal hood is contained within the upper open end of the vent and includes an internal cavity facing upwardly to receive rain and other foreign matter. The external hood includes a sidewall that flairs outwardly from an upper opening in vertical alignment with the cavity in the internal hood to a lower end overlying the sidewall of the vent body. The flared sidewall of the external hood is spaced outwardly from the internal hood to provide an unrestricted vertical passage for upward vapor discharge.
454347
Kirby Eades Gale Baker
Universal Valve Co. Inc.
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