Diffuser for aeration systems
AssigneeAshland Vault Incorporated
InventorEdward T. Loughridge
Life of this patent
Estimating the term…
Abstract
There is provided a simple gas diffusing apparatus composed of a top member having gas permeable perforations, a bottom member including a plurality of larger openings for removal of solid and semi-solid accretions, a gas inlet nipple for introduction of a gas, e.g. air, into the cavity formed by the assembly of the top and bottom members, a valve, a valve seat disposed on the inner surface of the bottom member, and stop means for the valve for confining the valve between a seated position and an unseated position.
Claims7
A diffuser for submerged gas treatment of a liquid system comprising a body assembly formed of a material which is non-porous and providing vertically spaced horizontally extending top and bottom wall portions cooperating at least in part to define an internal cavity, said bottom portion being formed with a centrally located inlet passage and an upwardly facing valve seat around said passage, said top wall portion being imperforate above said valve seat and providing a plurality of perforations in a pattern laterally around said valve seat, said bottom wall portion having a plurality of cut out openings laterally around said valve seat each having a greater open area than any individual perforation, and normally seated valve means positioned against said valve seat and closing said inlet passage, said valve means being movable under the influence of gas under pressure supplied through said inlet passage to an open unseated position, said body assembly providing means to confine the movement of said valve between said seated and unseated positions.
A diffuser for submerged aeration of a liquid comprising a top member formed of a non-porous material and providing a generally horizontally extending top wall portion having an imperforate central portion and a plurality of perforations therethrough generally symmetrically positioned around said central portion, said top member providing a depending perpheral flange, a bottom member providing a generally horizontal bottom wall space from said top wall and an upstanding peripheral flange dimensioned and configured for mating coaction with the depending peripheral flange of said top member to define an internal cavity, said bottom member providing a centrally located inlet gas nipple having an inlet passage therethrough and a valve seat within said cavity extending around said inlet passage beneath said central portion, said bottom member providing a plurality of cut out openings generally symmetrically positioned around said valve seat for removal of solid and semi-solid accretion within said cavity, a ball valve member positioned by gravity against said seat, and stop means on said top member for confining the movement of said ball between a seated position and a non-seated position.
Dependencies are inferred from the claim text.